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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549





FORM 10-K





(Mark One)

|þ | ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
|- | ------------------------------------------------------------------------------------

For the fiscal year ended December 31, 2010

or



| ̈ | TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
|- | ----------------------------------------------------------------------------------------

For the transition period from
                    to

Commission file number 000-52045





LOGO

Volcano Corporation

(Exact Name of Registrant as Specified in its Charter)





|                                                               |  |                                        
|-------------------------------------------------------------- |  | ---------------------------------------
|Delaware                                                       |  | 33-0928885                             
|(State or Other Jurisdiction of
Incorporation or Organization) |  | (I.R.S. Employer Identification Number)
|                                                               | 
|3661 Valley Centre Drive, Suite 200                            |  |                                        
|San Diego, California                                          |  | 92130                                  
|(Address of Principal Executive Offices)                       |  | (Zip Code)                             

Registrants telephone number, including area code:

(800) 228-4728

Securities registered pursuant to Section 12(b) of
the Act:



|                                         |  |                                          
|---------------------------------------- |  | -----------------------------------------
|Title of each class                      |  | Name of each exchange on which registered
|Common Stock, $0.001 per share par value |  | The NASDAQ Stock Market LLC              

Securities registered pursuant to Section 12(g) of the Act:

None





Indicate by
check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.    Yes  x    No   ̈

Indicate by check mark if the registrant is not required to file reports pursuant
to Section 13 or Section 15(d) of the Act.    Yes   ̈    No  x

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the
Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past
90 days.    Yes  x    No   ̈

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive
Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such
files).    Yes   ̈    No   ̈

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (§229.405 of this chapter)
is not contained herein, and will not be contained, to the best of registrants knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form
10-K.   ̈

Indicate by check mark whether the registrant is a large
accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of large accelerated filer, accelerated filer and smaller reporting company in Rule 12b-2
of the Exchange Act.



|                        |  |                                                 |  |                           |  |  
|----------------------- |  | ----------------------------------------------- |  | ------------------------- |  | -
|                        |  |                                                 | 
|Large accelerated filer |  | x                                               |  | Accelerated filer         |  |  ̈
|                        |  |                                                 | 
|Non-accelerated filer   |  |  ̈ (Do not check if a smaller reporting company) |  | Smaller reporting company |  |  ̈

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the
Act).    Yes   ̈    No  x

The aggregate market value of the voting common equity held by non-affiliates of the registrant, based upon the closing price of a share
of the registrants common stock on June 30, 2010 (which is the last business day of registrants most recently completed second fiscal quarter), as reported on the NASDAQ Global Market was approximately $1.1 billion. Approximately
196,000 shares of common stock held by executive officers and directors on June 30, 2010 have been excluded in that such persons may be deemed affiliates. This determination of affiliate status is not necessarily a conclusive determination for
other purposes.

At February 11, 2011, 51,758,829 shares of Common Stock, par value $0.001, of the registrant were
outstanding.





DOCUMENTS INCORPORATED BY REFERENCE

Part III of this Form 10-K incorporates information by reference to portions of the registrants definitive Proxy Statement for the Annual Meeting of Stockholders to be held on May 2,
2011. Such definitive Proxy Statement will be filed with the Securities and Exchange Commission not later than 120 days after December 31, 2010.









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VOLCANO CORPORATION

ANNUAL REPORT ON FORM 10-K FOR THE YEAR ENDED DECEMBER 31, 2010

TABLE OF CONTENTS



|              |  |                                                                                                               |     |  |     | 
|------------- |  | ------------------------------------------------------------------------------------------------------------- | --- |  | --- | 
|PART I        |  |                                                                                                               | 2   | 
|Item 1.       |  | Business                                                                                                      |     |  | 2   | 
|Item 1A.      |  | Risk Factors                                                                                                  |     |  | 15  | 
|Item 1B.      |  | Unresolved Staff Comments                                                                                     |     |  | 41  | 
|Item 2.       |  | Properties                                                                                                    |     |  | 41  | 
|Item 3.       |  | Legal Proceedings                                                                                             |     |  | 41  | 
|Item 4.       |  | Reserved                                                                                                      |     |  | 41  | 
|              | 
|PART II       |  |                                                                                                               | 42  | 
|Item 5.       |  | Market for Registrants Common Equity, Related Stockholder Matters and Issuer Purchases of Equity
 Securities |     |  | 42  | 
|Item 6.       |  | Selected Financial Data                                                                                       |     |  | 44  | 
|Item 7.       |  | Managements Discussion and Analysis of Financial Condition and Results of
Operations                         |     |  | 46  | 
|Item 7A.      |  | Quantitative and Qualitative Disclosures About Market Risk                                                    |     |  | 66  | 
|Item 8.       |  | Financial Statements and Supplementary Data                                                                   |     |  | 69  | 
|Item 9.       |  | Changes in and Disagreements With Accountants on Accounting and Financial
Disclosure                          |     |  | 113 | 
|Item 9A.      |  | Controls and Procedures                                                                                       |     |  | 113 | 
|Item 9B.      |  | Other Information                                                                                             |     |  | 114 | 
|              | 
|PART III      |  |                                                                                                               | 115 | 
|Item 10.      |  | Directors, Executive Officers and Corporate Governance                                                        |     |  | 115 | 
|Item 11.      |  | Executive Compensation                                                                                        |     |  | 115 | 
|Item 12.      |  | Security Ownership of Certain Beneficial Owners and Management and Related Stockholder
Matters                |     |  | 115 | 
|Item 13.      |  | Certain Relationships and Related Transactions, and Director Independence                                     |     |  | 115 | 
|Item 14.      |  | Principal Accounting Fees and Services                                                                        |     |  | 115 | 
|              | 
|PART IV       |  |                                                                                                               | 116 | 
|Item 15.      |  | Exhibits, Financial Statement Schedules                                                                       |     |  | 116 | 
|SIGNATURES    |  |                                                                                                               | 121 | 
|EXHIBIT INDEX |  |                                                                                                               | 123 | 

|              |  |  |  |  |  | 
|------------- |  |  |  |  |  | 
|EXHIBIT 10.9  |  |  |  |  |  | 
|EXHIBIT 10.11 |  |  |  |  |  | 
|EXHIBIT 10.12 |  |  |  |  |  | 
|EXHIBIT 10.13 |  |  |  |  |  | 
|EXHIBIT 10.14 |  |  |  |  |  | 
|EXHIBIT 10.18 |  |  |  |  |  | 
|EXHIBIT 10.19 |  |  |  |  |  | 
|EXHIBIT 12.1  |  |  |  |  |  | 
|EXHIBIT 21.1  |  |  |  |  |  | 
|EXHIBIT 23.1  |  |  |  |  |  | 
|EXHIBIT 23.2  |  |  |  |  |  | 
|EXHIBIT 31.1  |  |  |  |  |  | 
|EXHIBIT 31.2  |  |  |  |  |  | 
|EXHIBIT 32.1  |  |  |  |  |  | 
|EXHIBIT 32.2  |  |  |  |  |  | 



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This annual report on Form 10-K, or Annual Report, contains forward-looking statements
regarding future events and our future results that are based on current expectations, estimates, forecasts, and projections about the industries in which we operate and the beliefs and assumptions of our management. In some cases, you can identify
these forward-looking statements by words like may, will, should, expects, plans, anticipates, believes, estimates, predicts,
potential or continue or the negative of those words and other comparable words. These statements include, but are not limited to, those concerning the following; our intentions, beliefs and expectations regarding our future
financial performance, anticipated growth and trends in our business; the timing and success of our clinical trials, data presentations, regulatory submissions and anticipated product launches; our belief that our cash and cash equivalents and
available-for-sale investments will be sufficient to satisfy our anticipated cash requirements; our operating results; our expectations regarding our revenues and our customers and distributors; and statements regarding market penetration and
expansion efforts. Forward-looking statements are subject to risks and uncertainties that could cause actual results and events to differ materially. For a detailed discussion of these risks and uncertainties, see the Risk Factors
section of this Annual Report. Any forward-looking statement speaks only as of the date on which it is made, and except as required by law, we undertake no obligation to update forward-looking statements to reflect events or circumstances occurring
after the date of this Annual Report.

Volcano has registered and common law trademarks in the U.S.
and elsewhere in the world including, but not limited to, Axsun®, ChromaFlo®, ComboMap®, ComboWire®, Eagle Eye®, GlyDx, PrimeWire®, Revolution®, s5,
s5i, SpinVision®, VH®IVUS, and VIBE®RX. Other brand
names or trademarks appearing in this Annual Report are the property of their respective holders.

PART I



|Item 1. | Business
|------- | --------

Overview

We design, develop, manufacture and commercialize a broad suite of intravascular ultrasound, or IVUS, and functional measurement, or FM,
products. We believe that these products enhance the diagnosis and treatment of vascular heart disease by improving the efficiency and efficacy of existing percutaneous interventional, or PCI, therapy procedures in the coronary or peripheral
arteries. We market our products to physicians and technicians who perform PCI procedures in hospitals and to other personnel who make purchasing decisions on behalf of hospitals.

Our products consist of multi-modality consoles which are marketed as stand-alone units or as customized units that can be integrated
into a variety of hospital-based interventional surgical suites called catheterization laboratories, or cath labs. We have developed customized cath lab versions of these consoles and are developing additional functionality options as part of our
cath lab integration initiative. Our consoles have been designed to serve as a multi-modality platform for our phased array and rotational IVUS catheters, fractional flow reserve, or FFR, pressure wires, image-guided therapy catheters and
Medtronics Pioneer reentry device. We are developing additional offerings for integration into the platform, including, forward-looking IVUS, or FL.IVUS, catheters, and ultra-high resolution Optical Coherence Tomography, or OCT, systems and
catheters.

Our IVUS products include single-procedure disposable phased array and rotational IVUS imaging catheters and
additional functionality options such as virtual histology, or VH, IVUS tissue characterization and ChromaFlo stent apposition analysis. Our FM offerings include FM consoles and single-procedure disposable pressure and flow guide wires used to
measure the pressure and flow characteristics of blood around plaque enabling physicians to gauge the plaques physiological impact on blood flow and pressure.

We derive our revenues from two reporting segments: medical and industrial. Our medical segment represents our core business, in which we derive revenues primarily from the sale of our multi-modality and
FM consoles and our IVUS and FM single-use disposables. Our industrial segment derives revenues related to the



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sales of micro-optical spectrometers and optical channel monitors by Axsun Technologies, Inc., or Axsun, our wholly owned subsidiary, to telecommunication and industrial companies. We continue
building direct sales capabilities in the U.S., Western Europe, and Japan and have numerous distributor relationships in other geographies. During the year ended December 31, 2010, we generated worldwide revenues of $294.1 million, which
is composed of $271.1 million from our medical segment and $23.0 million from our industrial segment, and had operating income of $10.0 million. Our total assets as of December 31, 2010 were $431.6 million. Our revenue, operating income
and total assets and other financial results for the last three fiscal years are described in the Managements Discussion and Analysis of Financial Condition and Results of Operations and the Consolidated Financial
Statements sections contained in this Annual Report. At December 31, 2010, we had a worldwide installed base of more than 5,900 consoles. We intend to grow and leverage this installed base of consoles to drive recurring sales of our
single-use disposable catheters and guide wires, which accounted for approximately 79% of our medical segment revenues during the year ended December 31, 2010. In 2010, approximately 46% of the Companys revenues were generated in the
U.S., approximately 27% were generated in Japan, and approximately 20% were generated in Europe, the Middle East and Africa, with the balance of sales occurring in other international markets.

Our Strategy

Our
strategy is to offer a multi-modality platform that seeks to deliver all of the benefits associated with conventional IVUS and FM devices, while providing enhanced functionality and proprietary features that address the limitations associated with
conventional forms of these technologies. In addition, we have a number of new offerings under development that will further leverage our multi-modality platform. Factors driving our strategy include:



| |  |  | Accelerating the trend toward less invasive procedures. Our IVUS products offer continuous, real-time three-dimensional imaging, plaque
visualization, color-coded identification of plaque composition, and automatic drawing of lumen and vessel borders allowing for automatic vessel sizing. Our FM products offer physicians a simple pressure and flow based method to determine whether
stenting or additional PCI is required. We believe our combination of IVUS enhancements and FM is instrumental in facilitating less invasive procedures.
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Decreasing the number of interventional devices used per procedure and optimizing their usage. Our FM products offer the opportunity to
physiologically assess lesion severity and determine whether stents are needed. Additionally, our IVUS products provide intra-vascular imaging. As a result, our IVUS and FM products have the potential to reduce the number of devices deployed by
identifying the appropriate lesion for stenting and ensuring that it is placed and expanded correctly, thereby enhancing patient outcomes and lowering treatment costs.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Improving ease of use of IVUS and FM technologies to drive market adoption. We have designed our console offerings to be always there,
always on, and easy to use. Our consoles are easily integrated into an existing or newly constructed cath lab facility.
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Improving the diagnosis of cardiovascular disease.We believe our VH IVUS products can significantly improve the diagnosis of cardiovascular
disease by addressing the limitations of diagnostic angiography, and allowing clinicians to identify patients and lesions at risk for future adverse coronary vascular system events.
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Enhancing the outcomes of PCI procedures. We believe our products, enabled with novel technological enhancements, provide clinically significant
information that improves the outcomes of current and increasingly complex PCI procedures.
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Enabling new procedures to treat coronary artery disease, or CAD, peripheral artery disease, or PAD, and structural heart disease. Current
treatment of a number of vascular and structural heart diseases, including coronary, peripheral and carotid artery disease and atrial fibrillation, is limited by conventional catheter-based techniques and angiography. Because our technologies
address many of
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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| | these current limitations, we believe our products provide the potential to physicians to diagnose and, optimally, treat these diseases percutaneously, and may address limitations in the
treatment of structural heart disease.
| | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Our goal is to establish our IVUS and FM products as the standard of
care for PCI diagnostic and therapeutic procedures and expand the use of IVUS and FM for these procedures. The key elements of our strategy for achieving this goal are to:



| |  |  | Grow existing IVUS and FM Markets globally. We feel that most PCI procedures today, particularly more complex procedures would greatly benefit
from more precise guidance than angiography alone can provide. We feel that by making our devices easier to use, investing in development of technologies that make image interpretation faster, investing in thoughtful clinical studies and registries
that prove the benefit of our technology, educating physicians on the clinical need for our products and existing guidelines, training staff on the procedural use of our products, and providing access to all patients through the expansion of our
installed base, that we can continue to grow and cultivate the current PCI market which represents, on an annual basis, more than three million procedures worldwide. A growing portfolio of image guided therapy devices like our VIBE RX Vascular
Imaging Balloon, or VIBE RX, which combines a semi-compliant balloon catheter with on-board imaging, is another method to reduce friction and move more angiographic guided physicians or procedures to incorporate the precision guidance of our
products.
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Increase market share in existing IVUS and FM markets. We continue to introduce product enhancements to meet physicians needs for improved
visualization, characterization, and ease of use. We believe these enhancements make our products easier to use than competing products while providing substantially more and better information to improve procedural outcomes, thereby driving greater
usage of our IVUS and FM products within the existing PCI market. We believe we are the market leader in the IVUS market and intend to implement several strategies to increase our penetration in the FM market. First, we have addressed limitations of
conventional IVUS such as difficulty in use, lack of automation and grayscale imaging by developing technologies and introducing features such as automatic real-time drawing of lumen and vessel borders, color-coded identification of plaque
composition, and automatic vessel sizing. Second, we developed PC-based IVUS and FM consoles that can be integrated easily into cath labs, thereby making it easier for physicians to adopt and use our products. Third, we have increased the size of
our direct sales force and initiated direct distribution strategies in key geographies. We have also entered into distribution and marketing agreements with leading cath lab equipment and stent manufacturers. We intend to grow and leverage our
installed base of IVUS and FM consoles to drive recurring sales of our single-procedure disposable catheters and guide wires.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Expand into new markets and develop clinical applications for and utilization of our technology in new markets.We plan to leverage our current
technology and develop new technology to expand into new markets and increase clinical applications through clinical studies, conducted by us or in collaboration with other companies. This includes programs for (1) IVUS guided therapy products
that combine IVUS with balloons and potentially other therapeutic devices, (2) OCT light based imaging systems which we believe can be used in coronary, peripheral, and other vascular structures to image anatomy and other cellular activity,
(3) micro-catheter technologies for use in coronary, peripheral and other vascular applications, (4) FL.IVUS for applications including chronic total occlusions in the coronary and peripheral arteries, and Forward-Looking Intra-Cardiac
Echo, or FL.ICE, for other structural heart applications, and (5) unique optical and micro-electro-mechanical systems technologies in telecommunications, industrial spectroscopy or medical OCT applications.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Enhance product capabilities and introduce new products through collaborations or acquisitions. We have a successful track record of acquiring
and licensing technologies and collaborating with third parties to create synergistic product offerings. For instance, we licensed the VH IVUS technology that now forms the core of our ability to determine the composition of plaque from The
Cleveland Clinic Foundation. We also acquired the intellectual property rights allowing us to develop our Revolution
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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| | rotational catheter from Koninklijke Philips Electronics N.V. In December 2007, we acquired CardioSpectra, Inc., or CardioSpectra, whose core product line, based on innovative OCT technology, is
expected to complement our existing product offerings. During 2008, we acquired Novelis, Inc., or Novelis, which is developing FL.IVUS technology; substantially all of the assets of Impact Medical Technologies, LLC, which we are using to develop
innovative micro-catheter technologies; and Axsun which is a developer of optical and laser and non-laser technologies. In August 2010, we acquired Fluid Medical, Inc., or Fluid Medical, which is developing advanced catheter-based forward-looking
imaging technology. The Fluid Medical technology is complementary to our FL.IVUS technology and is expected to enable us to further develop products that address minimally invasive structural heart procedures, such as our FL.ICE program. We believe
there will be additional opportunities to leverage these capabilities through select technology or company acquisitions as well as collaborations that enhance our capabilities or complement our markets.
| | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Our Products

Our
multi-modality consoles are marketed as stand-alone units or units that can be integrated into cath labs. We offer consoles that combine IVUS and FFR technology, which are designed to allow the user to switch seamlessly between each modality. We
also offer systems with either IVUS or FFR. The significantly expanded functionality of our offering enables the networking of patient information, control of IVUS and FM information at both the operating table and in the cath lab control room, as
well as the capability for images to be displayed on standard cath lab monitors. Our products include IVUS catheters, FM guide wires, thrombus aspiration devices, and various options that provide additional functionality. We expect to continue to
develop new products and technologies to expand the market adoption of our offering, and also expect our platform will support IVUS integrated with other interventional devices in the future.

Consoles

We design, develop, manufacture and commercialize
multi-modality consoles that are proprietary, high-speed electronic systems that process the signals received from our IVUS catheters. These consoles generate high-resolution images that can be displayed on a monitor and can be permanently stored on
the system or another medium. Our consoles are mobile, proprietary and high speed electronic systems with different functionalities and sizes designed and manufactured to process the signals received only from our catheters and guide wires. Our IVUS
market strategy includes offering devices to clinicians that are easy to use, require lower procedure times and provide a higher level of information. We have a family of consoles including our PC-based s5 and the IVUS In-Vision Gold, or IVG. The s5
family of consoles, which became our primary console product offering following its full commercial launch in July 2006, is smaller, lighter and less expensive to manufacture than our IVUS IVG console, and has enhanced functionality. The s5 family
includes:



| |  |  | s5: We believe this portable and mobile console is the lightest product on the market, and has a simple and easy user interface.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------



| |  |  | s5i: This console is made up of components that can be customized to each cath labs specifications and integrated into virtually any cath
lab while retaining the full functionality of the s5. When the s5i is integrated into the cath lab, it works seamlessly with the workflow of the cath lab in terms of acquiring and archiving patient images and data.
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Both platforms support digital IVUS, rotational IVUS, VH IVUS, ChromaFlo, and FFR.

Our IVUS Products

Catheters.Our single-use disposable catheters operate and interface solely with our family of consoles. We are the only
company that offers both digital and rotational catheters. We believe this allows us to meet the needs of a greater number of physicians than our competitors. Our IVUS catheters vary in their principal uses, frequencies, shaft sizes, shaft lengths,
guide wire compatibility and distal tip lengths. These differences allow for the use of different catheters in various portions of the vascular system.



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We launched our latest generation digital catheter, the Eagle Eye Platinum Digital IVUS
Catheter, commercially in May 2010. Our Revolution rotational catheter is the highest frequency catheter on the market and we believe it offers better resolution in the area close to the end of the catheter, or near-field, than competitive
rotational catheters.

Additional Functionality. Our IVUS products incorporate key features that add valuable
clinical functionality addressing a number of the historical limitations of conventional IVUS. We intend to develop additional functionality in the future. Currently, we offer:

ChromaFlo.Angiography alone does not always identify malapposed stents because the contrast injection that makes the lumen visible on x-ray can flow inside the stent, and in between the
stent and vessel wall. When this occurs, the stent struts are too small to compete with the dark lumen of the x-ray, leaving the two dimensional image inconclusive or misleading. ChromaFlo stent apposition analysis uses sequential IVUS frames to
differentiate circulating blood from stationary or anchored tissue. ChromaFlo can be particularly important when assessing stent placement as the detailed cross-sectional image clearly identifies moving blood inside and outside of the stent lumen,
prompting physicians in many cases to expand the stent until all of the blood appears inside of the stent lumen. ChromaFlo can also help with the identification of luminal structures such as lumen border, bifurcations, dissections, and thrombus.

VH IVUS. Conventional IVUS allows the visualization of atherosclerotic plaque. However, it
is limited to a subjective, and therefore qualitative, review of vascular and plaque dimensions and composition. Our VH IVUS product allows, for the first time, easy to read and interpret IVUS images with color-coded identification of plaque
composition. Additionally, a key element of the VH IVUS product is the capability to provide automatic identification of lumen and vessel borders. This feature enables automated vessel sizing, which makes it easier and faster to use our IVUS
products. Finally, our VH IVUS functionality offers the potential to determine plaque vulnerability and therefore stratification of risk. We have developed fully functional devices for each of these technologies and used them in clinical studies. In
January 2011, the New England Journal of Medicine published results from our clinical study Providing Regional Observations to Study Predictors of Events in the Coronary Tree, or PROSPECT, an international multi-center study, which demonstrated that
VH® IVUS tissue characterization software enables physicians to more accurately assess the risk of individual
blockages than the use of the current standard-of-careangiographic imagingalone. The PROSPECT results demonstrated the ability to use VH IVUS to identify high-risk plaques that could potentially be treated to prevent future events, and
low-risk plaques that may not need intervention. We are in the process of participating in several additional clinical studies to correlate plaque vulnerability to its clinical significance and risk, and believe that these data will lead to further
utilization of VH IVUS to triage coronary lesions.

Our FM Products

Our FM products consist of pressure and flow consoles and single-procedure disposable pressure and flow guide wires. We believe we are the
only company that offers a full line of pressure and flow guide wires as well as a guide wire that can measure both pressure and flow. In addition, our FM products can be integrated with our s5 family of multi-modality consoles. In August 2010, we
commercially launched PrimeWire PRESTIGE, our latest generation pressure guide wire. We expect to introduce additional next generation FM wires in 2011.

We believe that the release and publication of favorable trial data relating to the measurement of FFR in addition to angiography will lead to further adoption of FM technology by clinicians.



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Product Expansion

We currently have a number of products under development that will leverage our existing platform technology and we believe will expand our presence in interventional medicine and related markets. Our
product pipeline includes:

Image Guided Therapies

As more procedures become PCI-based, there is an opportunity to integrate the imaging capability of IVUS with coronary and peripheral therapeutic devices. We are developing Image Guided Therapy products
that include image guided stents and image guided coronary and peripheral balloons. If commercialized, we believe these products will further expand and differentiate our product offering, drive IVUS utilization and enable us to participate in large
endovascular market opportunities. IVUS can also be integrated with and guide leads for implantable cardiac rhythm management devices, percutaneous valves, abdominal aortic aneurysm grafts, plaque ablation or excision devices, inferior vena cava
filters, and thrombectomy devices. Additionally, there are opportunities to extend the utility of the pressure and flow guide wires into different electrophysiology and structural heart disease applications.

We have obtained approval to affix the CE Mark for the VIBE RX catheter, our first image-guided therapy device. A single VIBE RX catheter
can quickly access, prepare, and assess challenging lesions. IVUS guidance provides precise, targeted balloon dilatation with immediate confirmation of interventional results. We began commercial shipments of our VIBE RX offering in Europe and South
Africa in December of 2010. We are in discussions with regulatory authorities in the U.S. and Japan regarding the clinical development of the VIBE RX catheter in those markets. We expect to launch the VIBE RX catheter in Japan in 2011 and in the
U.S. in 2012.

Optical Coherence Tomography (OCT)

We are developing our OCT products to complement our existing product offerings and further enhance our position as an imaging technology leader in the field of interventional medicine. Our early model
OCT systems have been used in several clinical settings in Europe and South America. We believe our OCT products will be an important addition to our product line, as we expect that it will allow us to expand our reach into clinical situations where
extremely high resolution imaging is paramount. Our goal is to integrate this OCT functionality directly into our s5i integrated imaging suite of products. Our OCT system is designed to allow fast, easy imaging of highly detailed structures in the
vasculature, including vessel wall defects, intra-luminal thrombus and stent struts. The ability to visualize stent expansion and apposition is excellent when using OCT. Our OCT resolution is able to visualize even very thin layers of cells covering
drug eluting stent struts at follow-up. However, unlike IVUS, OCT cannot see through blood and requires contrast injections while imaging. OCT also does not penetrate the vessel wall, so only measurements within the lumen and the first one to two
millimeter of the lumen wall are possible. This means that the user cannot measure the full volume and type of plaque or provide the ability to visualize from vessel wall to vessel wall in the presence of coronary disease. We believe OCT will
complement IVUS in its ability to see small luminal structures. This will predominantly be a clinical research tool initially until further clinical data can be developed to understand how OCT can be applied to daily PCI practice.

Pending the outcome of our Delaware Chancery Court litigation (see Note 4 Commitments and Other Contractual
ObligationsLitigation to our consolidated financial statements) we intend to use a novel integrated non-laser light source developed by Axsun for OCT imaging: the High Definition Swept Source, or HDSS. The HDSS is expected to enable high
resolution at unprecedented speeds in medical imaging systems of 200 kHzapproximately four to ten times faster than commercially available OCT imaging systems. We believe the Axsun acquisition will bolster our ability to pursue a number of
medical OCT applications outside intravascular coronary and peripheral imaging, including application in ophthalmology, dentistry, cancer diagnostics, urology, endoscopy, diagnosis and treatment of peripheral artery disease, and blood glucose
monitoring. We further expect the capabilities of our OCT technology will be highly valued by other device manufacturers as they design and conduct clinical trials to assess the safety and effectiveness of new implantable devices.



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Forward Looking IVUS (FL.IVUS)

A principal area of focus for us is the development of our FL.IVUS offerings, utilizing advanced imaging technology we obtained through
our acquisition of Novelis. This proprietary technology has potential applications for a number of minimally invasive diagnostic and therapeutic applications in the coronary and peripheral vasculature. Our strategy is to integrate these offerings
into our s5 family of consoles and target markets such as chronic total occlusions and other coronary, peripheral and structural heart indications. We currently have two FL.IVUS products under development. The first provides forward looking
ultrasonic guidance and will be used in conjunction with interventional guidewires to cross lesions. The second will incorporate this guidance capability with a therapeutic device that tunnels through lesions.

Clinical Program

Our
clinical studies are generally post-marketing studies using FDA-cleared and/or CE-marked products intended to provide data regarding diagnostic effectiveness and disease treatment outcomes, as well as the potential value of our products in providing
therapy in markets and indications such as stent placement and optimization, vulnerable plaque detection and therapy guidance in the coronary and carotid arteries. The goal of our vulnerable plaque clinical program is to identify, risk assess, and
guide PCI and pharmacologic (relating to the study of drugs, their sources, their nature and their properties) treatments of vulnerable plaque in the coronary and carotid arteries.

Our significant ongoing clinical studies include:

Assessment of Dual Anti-Platelet Therapy with Drug-Eluting Stents (ADAPT-DES)

ADAPT-DES is a prospective, multi-center, registry of up to 15,000 consecutive patients with coronary artery disease undergoing stent-assisted PCI using DES without major procedural complications. The
objectives of this trial are to determine the frequency and timing of DES thrombosis. There is an IVUS sub-study that will enroll patients at sites in the U.S. and Europe. The purpose of the sub-study is to determine whether one or more IVUS
parameters are independent predictors of stent thrombosis. Enrollment was completed in the third quarter of 2010, with over 9,000 patients enrolled in the main study and over 1,900 patients enrolled in the sub-study.

Vascular Evaluation for Revascularization: Defining the Indications for Coronary Therapy: A Pilot Study (VERDICT)

VERDICT is a prospective, global, multicenter study to determine the correlation between FFR and VH IVUS in patients with intermediate
coronary lesions. The objectives of this study are to establish the correlation between FFR and VH IVUS-derived parameters; to assess the ability of operators to accurately assess angiographic and IVUS data and to examine the contemporary use of FFR
and VH IVUS by operators in determining whether intermediate coronary lesions should undergo treatment. Enrollment started in September 2010 and we expect will continue up to four years (including approximately six months for enrollment and three
years of clinical follow-up). Baseline enrollment is expected to be completed in second quarter of 2011 and we expect to present data at the Transcatheter Cardiovascular Therapeutics 2011 Conference, or TCT 2011.

Fractional Flow Reserve and Intravascular Ultrasound Relationship Study (FIRST)

FIRST is a multi-center, prospective registry of patients with intermediate coronary lesions that will undergo both VH IVUS and FFR
interrogation. This study will enroll 300 patients at sites in the U.S. and Europe, who are undergoing a clinically indicated angiogram and who have intermediate coronary lesions. The primary objective of the study is to evaluate the
relationship between angiography, IVUS, VH, and FFR measurements. Enrollment in this study started in September 2010 and is expected to be completed the first quarter of 2011. We expect to present data related to this study at TCT 2011.



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Volcano OCT Image Lesion Analysis using Intravascular Optical Coherence Tomography (VOILA)

The VOILA study will be a randomized, un-blinded, multi-center OCT imaging study in patients scheduled for either
coronary diagnostic catheterization or intervention. There will be approximately 100 patients enrolled at eight sites in the U.S. The primary objective is to evaluate the safety and efficacy of the OCT system in the observation of coronary arteries.
Enrollment is expected to commence in the second quarter of 2011.

Clinical Studies Using IVUS and VH Products

We are, or have been, involved with GlaxoSmithKline plc, Abbott Cardiovascular Systems, Inc., or Abbott, Hoffman-La Roche, Ltd., Novartis
AG, Lipid Sciences, Inc., Tanabe Seiyaku Co., Ltd. and Kowa Company, Ltd. in clinical studies using IVUS and our VH IVUS product. Having been involved in clinical studies with these entities may enable us to participate in a growing number of drug
studies in the future.

Sales, Marketing and Distribution

We sell consoles and disposables through our own direct sales force and distributors. In addition, we sell our consoles through our supply and distribution agreements with third parties. Our strategy is
to leverage our installed base of consoles to drive recurring sales of our proprietary disposables. We provide training and clinical support to users of our products to increase their familiarity with product features and benefits, thereby
increasing usage.

We have direct sales capability in the U.S., Western Europe, Japan and South Africa. We intend to continue
to increase our direct sales personnel over time. At December 31, 2010, we had over 250 direct sales and support professionals, including over 150 in the U.S., over 65 in Japan, and over 35 in Europe and the remaining in other geographies. In
addition, we have numerous distributor relationships in these and other geographic areas.

During 2009, we began implementing
our strategy to convert from a third-party distribution model in Japan to a direct sales model. In addition, we have continued to expand the number of direct sales representatives in the U.S. and in Europe consistent with our direct sales strategy.

In the U.S., we sell our products directly to customers and through our third-party distribution and marketing agreements.
Through August 2009, we sold our IVUS and FM products in Japan primarily through three direct distributors: Goodman Company Ltd., or Goodman, Fukuda Denshi Co., Ltd., or Fukuda, and Johnson & Johnson K.K., Cordis Division, or
Johnson & Johnson. In August 2009, we terminated our distribution relationship with Goodman and implemented a direct sales program to replace that relationship. In September 2010, we entered into an agreement to terminate our distribution
agreement with Fukuda effective November 30, 2010. Johnson & Johnson continues to distribute our IVUS disposable products for endovascular and peripheral applications in Japan. We currently support our Japanese customers through our
Tokyo-based subsidiary, Volcano Japan Co., Ltd., or Volcano Japan. In Europe, we distribute our IVUS and FM products through our subsidiary, Volcano Europe, S.A./N.V., or Volcano Europe. We sell our products directly to customers in certain European
markets and utilize distributors in other European markets.

We have marketing agreements with leading healthcare company
partners or their affiliates, including Medtronic, Inc., or Medtronic, General Electric Company, Siemens AG, Philips Medical Systems Nederland B.V., Johnson & Johnson, and Abbott. These agreements allow us to coordinate our marketing
efforts with our strategic partners while still dealing directly with the customer.

At December 31, 2010, our global
marketing team was comprised of over 35 individuals, covering product management, corporate communications and programs, clinical support, and education and training. We devote significant resources to training and educating physicians in the use
and benefits of our products. We also promote our products through medical society meetings attended by interventionalists.



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Our relationships with physician thought leaders in interventional cardiology are an
important component of our selling and marketing efforts. These relationships are typically built around research collaborations that enable us to better understand and articulate the most useful features and benefits of our products, and to develop
new solutions to challenges in PCI medicine.

Financial Information About Geographic Areas

The following table sets forth our revenues by geography expressed as dollar amounts (in thousands) and as a percentage of revenue by
geography to total revenue:



|                                   |  |                          |         |  |                   |   |         |      |  |   |              |  |  |              |      |   |  |  |       |  
|---------------------------------- |  | ------------------------ | ------- |  | ----------------- | - | ------- | ---- |  | - | ------------ |  |  | ------------ | ---- | - |  |  | ----- | -
|                                   |  | Years Ended December 31, |         |  | Percentage Change |  
|                                   |  | 2010                     |         |  | 2009              |   |         | 2008 |  |   | 2009 to 2010 |  |  | 2008 to 2009 |     
|Revenues (1):                      |  |                          |         |  |                   |   |         |      |  |   |              |  |  |              |      |   |  |  |       |  
|United States                      |  | $                        | 134,645 |  |                   | $ | 110,502 |      |  | $ | 87,513       |  |  |              | 21.8 | % |  |  | 26.3  | %
|Japan                              |  |                          | 79,277  |  |                   |   | 52,339  |      |  |   | 43,582       |  |  |              | 51.5 |   |  |  | 20.1  |  
|Europe, the Middle East and Africa |  |                          | 57,614  |  |                   |   | 47,609  |      |  |   | 33,197       |  |  |              | 21.0 |   |  |  | 43.4  |  
|Rest of world                      |  |                          | 22,610  |  |                   |   | 17,417  |      |  |   | 7,203        |  |  |              | 29.8 |   |  |  | 141.8 |  
|                                   |  |                          |         |  |                   |   |         |      |  |   |              |  |  |              |      |   |  |  |       |  
|                                   |  | $                        | 294,146 |  |                   | $ | 227,867 |      |  | $ | 171,495      |  |  |              | 29.1 |   |  |  | 32.9  |  
|                                   |  |                          |         |  |                   |   |         |      |  |   |              |  |  |              |      |   |  |  |       |  

In 2009 $4.7 million was reclassified from Europe, the Middle East and Africa to
Japan.

At December 31, 2010, approximately 51% of our long-lived assets, excluding financial assets, were
located in the U.S., approximately 34% were located in Japan, and less than 15% were located elsewhere.

Our international
operations expose us and our representatives, agents, and distributors to risks inherent in operating in foreign jurisdictions, including the risks described in Risk FactorsThe risks inherent in our international operations may adversely
impact our revenues, results of operations and financial condition.

Competition

We compete primarily on the basis of our ability to assist in the diagnosis and treatment of vascular diseases safely and effectively,
with ease and predictability of product use, adequate third-party reimbursement, brand name recognition and cost. We believe that we compete favorably with respect to these factors, although there can be no assurance that we will be able to continue
to do so in the future or that new products that perform better than those we offer will not be introduced. We believe that our continued success depends on our ability to:



| |  |  | innovate and maintain scientifically advanced technology;
| | - |  | ---------------------------------------------------------



| |  |  | apply our technology across products and markets;
| | - |  | -------------------------------------------------



| |  |  | successfully market our products;
| | - |  | ---------------------------------



| |  |  | develop proprietary products;
| | - |  | -----------------------------



| |  |  | successfully conduct clinical studies that expand our markets;
| | - |  | --------------------------------------------------------------



| |  |  | obtain and maintain patent protection for our products;
| | - |  | -------------------------------------------------------



| |  |  | obtain and maintain regulatory approvals;
| | - |  | -----------------------------------------



| |  |  | achieve manufacturing efficiencies;
| | - |  | -----------------------------------



| |  |  | attract and retain skilled personnel; and
| | - |  | -----------------------------------------



| |  |  | successfully add complementary offerings and technology through acquisitions, licensing agreements and strategic partnerships.
| | - |  | ------------------------------------------------------------------------------------------------------------------------------



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Our primary IVUS competitor globally is Boston Scientific, Inc., or Boston Scientific, but
we also compete with Terumo Corporation in Japan. In the FM market, our primary competitor is St. Jude Medical, Inc., or St. Jude, which acquired Radi Medical Systems AB, or Radi, in 2008. Because of the size of the vascular market opportunities,
competitors and potential competitors have dedicated and will continue to dedicate significant resources to aggressively promote their products. New product developments that could compete with us more effectively are likely because the vascular
disease market is characterized by extensive research efforts and technological progress. Competitors may develop technologies and products that are safer, more effective, easier to use or less expensive than ours.

We have encountered and expect to continue to encounter potential physician customers who, due to existing relationships with our
competitors, are committed to or prefer the products offered by these competitors.

Through our Axsun subsidiary, we compete
on the basis of leading technology, high quality and the enhanced productivity that our products offer to customers in a variety of industries, including telecommunications, pharmaceutical manufacturing, high-speed industrial process control,
chemical and petrochemical processing, medical diagnostics, and scientific discovery. Products developed by competitors based on lower performance tunable filter technology could compete on the basis of lower cost. In addition, customers may build
similar functionality directly into their products. Our primary competitors in the telecommunications market include Optoplex Corporation, Aegis Lightwave, Inc. and BaySpec, Inc.

We expect that competitive pressures may result in price reductions and reduced margins over time for our products. Our products may be
rendered obsolete or uneconomical by technological advances developed by one or more of our competitors.

Additional
information regarding the risks associated with our competitive position and environment is described in Risk FactorsRisks Related to Our Business and Industry.

Intellectual Property

We believe that in order to maintain a competitive
advantage in the marketplace, we must develop and maintain the proprietary aspects of our technologies. We rely on a combination of patent, trademark, trade secret, copyright and other intellectual property rights and measures to aggressively
protect our intellectual property.

We require our employees and consultants to execute confidentiality agreements in
connection with their employment or consulting relationships with us. We also require our employees and consultants who work on our products to agree to disclose and assign to us all inventions conceived during the term of their employment, while
using our property or which relate to our business. Despite measures taken to protect our intellectual property, unauthorized parties may attempt to copy aspects of our products or to obtain and use information that we regard as proprietary. In
addition, our competitors may independently develop similar technologies.

The medical device industry is characterized by the
existence of a large number of patents and frequent litigation based on allegations of patent infringement. As the number of entrants into our market increases, the risk of an infringement claim against us grows. While we attempt to ensure that our
products and methods do not infringe other parties patents and proprietary rights, our competitors may assert that our products, and the methods we employ, are covered by patents held by them. In addition, our competitors may assert that
future products and methods we may employ infringe their patents. If third parties claim that we infringe upon their intellectual property rights, we may incur liabilities and costs and may have to redesign or discontinue selling the affected
product. For example, in July 2010, St. Jude Medical, Inc., or St. Jude, sued us for patent infringement alleging products that have been on the market for more than ten years infringe upon St. Judes patents. Additional information regarding
our litigation with St. Jude is provided in Note 4 Commitments and Other Contractual Obligations  Litigation to our consolidated financial statements and risks related to our intellectual property rights are described in Risk
FactorsRisks Related to Our Intellectual Property and Potential Litigation.



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Patents and Trademarks

We continue to expand and protect our intellectual property position. At December 31, 2010, we had a broad portfolio of over 450
owned or licensed U.S. and international patents and nearly 250 pending applications for owned or licensed patents. Our patents expire at various dates through 2030. We intend to continue to expand our intellectual property position to protect the
design and use of our products, principally in the areas of IVUS, OCT imaging, image guided therapies and FM for the diagnosis and guidance of treatment of vascular and structural heart disease.

Additionally, we utilize trademarks, trade names or logos in conjunction with the sale of our products. We currently
have registered and common law trademarks in the U.S. and elsewhere in the world including, but not limited to,
Axsun®, ChromaFlo®, ComboMap®, ComboWire®, Eagle Eye®, VH®IVUS, VIBE®RX, GlyDx, PrimeWire®, Revolution®, s5,
s5i and SpinVision®. We continue to invest in internal research and development of concepts within our
current markets and within other potential future markets. This enables us to continue to build our patent portfolio in areas of company interest.

Research and Development

Our research efforts are directed towards the
development of new products and technologies that expand our existing platform of capabilities and applications in support of PCI. At December 31, 2010, our research and development staff consisted of 150 full-time engineers and technicians.
The majority of this staff is located in Rancho Cordova, California. We also have research and development staff in Cleveland, Ohio; Forsyth County, Georgia; San Diego, California; and Billerica, Massachusetts. Our research and development staff is
focused on the development of new multi-modality systems and catheters, FM consoles and guide wires, image-guided therapy systems, OCT and additional clinical applications that support our core business objectives.

Our product development process incorporates teams organized around each of our core technologies, with each team having representatives
from research and development, marketing, regulatory, quality, clinical affairs and manufacturing. Our team sets development priorities based on communicated customer needs. The feedback received from beta testing is incorporated into successive
design iterations until a new product is ready for release.

Our research and development expenses were $42.5 million in 2010,
$37.4 million in 2009, and $26.7 million in 2008. These totals include expenses related to research and development, clinical and regulatory affairs. In addition, in 2010 we recorded a $3.0 million reduction in in-process research and
development expenses related to the reversal of expenses recognized in the prior year for a development milestone related to the acquisition of the FL.IVUS program from Novelis, as we believed we would no longer achieve the milestone. In 2009 we
recognized in-process research and development expense of $14.0 million, which included an $11.0 million milestone payment for our OCT project acquired from CardioSpectra and the accrual of a $3.0 million milestone payment related to our FL.IVUS
project acquired from Novelis. In 2008, we recognized in-process research and development expense of $12.7 million related to our acquisition of Novelis.

Manufacturing

Our manufacturing facilities are located in Rancho Cordova,
California, where we produce multi-modality consoles, FM consoles, IVUS catheters and FM guide wires, and Billerica, Massachusetts, where we produce our optical monitors, laser and non-laser light sources, and optical engines used in OCT imaging
systems as well as micro-optical spectrometers and optical channel monitors.

Our console manufacturing strategy is to use
third-party manufacturing partners to produce circuit boards, CPUs, and mechanical sub-assemblies. We perform incoming inspection, final assembly and product testing to assure quality control. Our manufacturing strategy for our single-procedure
disposable products is to use third-party manufacturing partners for certain proprietary components used in the final assembly. We perform



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incoming inspection on these components, assemble them into finished devices and test the final product to assure quality control. A portion of the scanner and sensor manufacturing is performed
at third party contractors facilities using automated assembly processes and equipment. We are dependent on these third parties for day-to-day control and protection of their systems. We conduct the remaining process operations including final
testing on the scanners and sensors at our Rancho Cordova facility. We aim to continuously improve our manufacturing processes to reduce costs and improve margins. We believe that by moving to PC-based consoles and improving our manufacturing
processes through broad adoption of lean principles, selective use of automation and continuous design enhancements, we will be able to continue to reduce the cost to manufacture our consoles and single-procedure disposable products.

We manufacture our products in a controlled environment and have implemented quality control systems as part of our manufacturing
processes. The control systems for our IVUS and FM products materially comply with the FDA Quality System Regulations, or QSR and other required global regulations. We believe we are in material compliance with the FDA QSR for medical devices, with
ISO 13485 quality standards, and with applicable medical device directives promulgated by the European Union and the policy on the Canadian Medical Devices Conformity Assessment System, which facilitates entry of our products into the European Union
and Canada as well as the Pharmaceutical Affairs Law (PAL) as required for Japanese regulations. The FDA and European Union Notified Body have both inspected our manufacturing facilities during the last 20 months. The control systems for our
optical and laser products are certified under ISO 9001:2008.

Our IVUS and FM manufacturing facility has been inspected by
the FDA, the California Department of Health Services Food and Drug Branch, and the European Union Notified Body and the Pharmaceutical & Medical Device Administration, or PMDA, Japanese regulatory authorities. Observations for improvements
have been noted as well as findings of deficiencies. We believe we have adequately addressed the inspectional observations and we are in material compliance with applicable regulatory directives. We expect to be inspected by the FDA and state and
international authorities again in the future. If the FDA or state or international authorities find significant shortcomings, we could be subject to fines or requirements to recall or halt manufacturing and shipments of affected products. Any of
these enforcement actions could have a material effect on our business, by disrupting our ability to manufacture and sell product, impacting our profitability or harming our reputation or that of our products. See Risk FactorsRisks
Related to Government Regulation.

We plan to build a new facility in Costa Rica which we will use to increase our
manufacturing capacity. During September 2010 we entered into a series of agreements under which we have purchased land and will build a manufacturing facility. We plan to complete construction in first half of 2012 at which time we expect
commercial manufacturing to begin. We expect to invest approximately $40 million in the completion of this facility and related improvements. We will be making key hires through 2011 in order to meet our production target of early 2012.

Government Regulation

Our medical device products are subject to extensive and rigorous regulation by the FDA, as well as other federal and state regulatory bodies in the U.S. and comparable authorities in other countries. We
currently market our products in the U.S. under authorizations from the FDA, which are based on clearances of pre-market notification submissions, or 510(k); or approval of premarket approval applications, or PMA. If we seek to market new products,
or to market new indications for our existing products, we will be required to obtain 510(k) clearance or PMA approval, as applicable. In January 2011, the FDA announced twenty-five action items it intends to take with respect to the pre-market
notification process. Although the FDA has not detailed the specific modifications or clarifications that it intends to make to its guidance, policies and regulations pertaining to the review and regulation of devices such as ours which seek and
receive market clearance through the 510(k) pre-market notification process, the FDAs announced action items signal that additional regulatory requirements are likely. These reforms, when implemented, could impose additional regulatory
requirements upon us which could delay our ability to obtain new clearances, increase the costs of compliance, or restrict our ability to maintain our current clearances.



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FDA regulations govern the following activities that we perform, or that are performed on
our behalf, to ensure that medical products distributed domestically or exported internationally are safe and effective for their intended uses:



| |  |  | product design, development and manufacture;
| | - |  | --------------------------------------------



| |  |  | product safety, testing, labeling and storage;
| | - |  | ----------------------------------------------



| |  |  | clinical trials;
| | - |  | ----------------



| |  |  | record keeping;
| | - |  | ---------------



| |  |  | product marketing, sales and distribution; and
| | - |  | ----------------------------------------------



| |  |  | post-marketing safety surveillance, complaint handling, investigating reports of adverse events and malfunctions, reporting of serious injuries,
including deaths, repairs, and recall of products.
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Failure to comply with applicable regulatory
requirements can result in enforcement action by the FDA, which may be preceded by notices of deficiencies or noncompliance via inspectional observations on form FDA-483, or 483s, general correspondence known as Untitled Letters, and
more formal letters called Warning Letters. If we do not adequately and appropriately address the cited deficiencies or noncompliance, including the repair, replacement or recall of affected products if necessary, within a reasonable
period of time, the FDA may take any one or more the following actions, which could adversely affect our business:



| |  |  | order a mandatory recall;
| | - |  | -------------------------



| |  |  | physically seize the affected products;
| | - |  | ---------------------------------------



| |  |  | seek a court-ordered injunction and consent decree that could include, but may not be limited to, operating restrictions, additional government
oversight of our operations, specific corrective and preventative actions, and partial suspension or total shutdown of production;
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | suspend review or refuse to clear pending 510(k) submissions or approvals pending for new products, new intended uses, or modifications to existing
products;
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | after notice and an opportunity for a hearing, withdraw 510(k) clearances or PMA approvals that have already been granted;
| | - |  | --------------------------------------------------------------------------------------------------------------------------



| |  |  | impose civil monetary penalties; and
| | - |  | ------------------------------------



| |  |  | initiate criminal prosecution.
| | - |  | ------------------------------

See Risk factorsRisks Related to Government Regulation.

Employees

At December 31, 2010, we had 1,144 employees. None of our employees is represented by a labor union, and we believe
our employee relations are good.

Seasonality

Our business is generally seasonal in nature and, historically, demand for our products has been the highest in the fourth quarter. Our working capital requirements vary from period to period depending on
manufacturing volumes, the timing of deliveries and the payment cycles of our customers.



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Corporate Information

We were incorporated in the state of Delaware in January 2000 and until 2003 were a development stage company substantially devoted to the research and development of tools designed to diagnose
vulnerable plaque. In July 2003, we acquired substantially all of the assets related to the IVUS and FM product lines from Jomed, Inc. and commenced the manufacturing, sale and distribution of IVUS and FM products. Our principal executive
offices are located in San Diego, California.

Available Information

Our corporate website is www.volcanocorp.com and our Annual Report on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form
8-K, and amendments to reports filed pursuant to Sections 13(a) and 15(d) of the Securities Exchange Act of 1934, as amended, are available free of charge on our website as soon as reasonably practicable after we electronically file such material
with, or furnish it to, the U.S. Securities and Exchange Commission, or SEC. The SEC maintains an Internet site that contains reports, proxy and information statements, and other information regarding the company, at www.sec.gov. These reports and
other information concerning the company may also be accessed at the SECs Public Reference Room at 100 F Street, NE, Washington, DC 20549. The public may obtain information on the operation of the Public Reference Room by calling the SEC at
1-800-SEC-0330. The contents of these websites are not incorporated into this filing. Further, our references to the URLs for these websites are intended to be inactive textual references only.



|Item 1A. | Risk Factors
|-------- | ------------

Risks
Related to Our Business and Industry

We are dependent on the success of our consoles and catheters and cannot be certain that IVUS
and FM technology or our IVUS and FM products will achieve the broad acceptance necessary to develop a sustainable, profitable business.

Our revenues are primarily derived from sales of our intravascular ultrasound, or IVUS, and functional measurement, or FM products, which include our multi-modality consoles and our single-procedure
disposable catheters and fractional flow reserve wires. IVUS technology is widely used for determining the placement of stents in patients with coronary disease in Japan but the penetration rate in the U.S. and Europe for the same type of procedure
is relatively low. Our wires are used to measure the pressure and flow characteristics of blood around plaque enabling physicians to gauge the physiological impact of blood flow and pressure. We expect that sales of our IVUS and FM products will
continue to account for a majority of our revenues for the foreseeable future, however it is difficult to predict the penetration and future growth rate or size of the market for IVUS and FM technology. The expansion of the IVUS and FM markets
depends on a number of factors, such as:



| |  | physicians accepting the benefits of the use of IVUS and FM in conjunction with angiography;
|- |  | --------------------------------------------------------------------------------------------



| |  | physician experience with IVUS and FM products;
|- |  | -----------------------------------------------



| |  | the availability of, and physicians willingness to participate in, training required to gain proficiency in the use of IVUS and FM products;
|- |  | ---------------------------------------------------------------------------------------------------------------------------------------------



| |  | the additional procedure time required for use of IVUS and FM;
|- |  | --------------------------------------------------------------



| |  | the perceived risks generally associated with the use of new products and procedures;
|- |  | -------------------------------------------------------------------------------------



| |  | the availability of alternative treatments or procedures that are perceived to be or are more effective, safer, easier to use or less costly than IVUS
and FM technology;
|- |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | the availability of adequate reimbursement; and
|- |  | -----------------------------------------------



| |  | the success of our marketing efforts and publicity regarding IVUS and FM technology.
|- |  | ------------------------------------------------------------------------------------



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Even if IVUS and FM technology gain wide market acceptance, our IVUS and FM products may not adequately
address market requirements and may not continue to gain market acceptance among physicians, healthcare payors and the medical community due to factors such as:



| |  | the lack of perceived benefits of information related to plaque composition available to the physician through use of our IVUS products, including the
ability to identify calcified and other forms of plaque;
|- |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | the lack of perceived benefits of information related to pressure and flow characteristics of blood around plaque available to the physician through
the use of our FM products;
|- |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | the actual and perceived ease of use of our IVUS and FM products;
|- |  | -----------------------------------------------------------------



| |  | the quality of the images rendered by our IVUS products;
|- |  | --------------------------------------------------------



| |  | the quality of the measurements provided by our FM products;
|- |  | ------------------------------------------------------------



| |  | the cost, performance, benefits and reliability of our IVUS and FM products relative to competing products and services;
|- |  | ------------------------------------------------------------------------------------------------------------------------



| |  | the lack of perceived benefit of integration of our IVUS and FM products into the catheterization laboratory, or cath lab; and
|- |  | ------------------------------------------------------------------------------------------------------------------------------



| |  | the extent and timing of technological advances.
|- |  | ------------------------------------------------

If IVUS and FM technology generally, or our IVUS and FM products specifically, do not gain wide market acceptance, we may not be able to achieve our anticipated growth, revenues or profitability and our
results of operations would suffer.

The risks inherent in our international operations may adversely impact our revenues, results of
operations and financial condition.

We derive, and anticipate we will continue to derive, a significant portion of our
revenues from operations in Japan and Europe. As we expand internationally, we will need to hire, train and retain qualified personnel for our manufacturing and direct sales efforts, retain distributors and train their and our manufacturing, sales
and other personnel in countries where language, cultural or regulatory impediments may exist. We cannot ensure that distributors, physicians, regulators or other government agencies will accept our products, services and business practices. In
addition, we purchase, and in the future will manufacture, some components in international markets. The manufacture, sale and shipment of our products and services across international borders, as well as the purchase of components from
international sources, subject us to extensive U.S. and foreign governmental trade regulations. Compliance with such regulations is costly. Any failure to comply with applicable legal and regulatory obligations could impact us in a variety of ways
that include, but are not limited to, significant criminal, civil and administrative penalties, including imprisonment of individuals, fines and penalties, denial of export privileges, seizure of shipments and restrictions on certain business
activities. Failure to comply with applicable legal and regulatory obligations could result in the disruption of our manufacturing, shipping and sales activities. Our international sales operations expose us and our representatives, agents and
distributors to risks inherent in operating in foreign jurisdictions, including:



| |  | our ability to obtain, and the costs associated with obtaining, U.S. export licenses and other required export or import licenses or approvals;
|- |  | -----------------------------------------------------------------------------------------------------------------------------------------------



| |  | changes in duties and tariffs, taxes, trade restrictions, license obligations and other non-tariff barriers to trade;
|- |  | ---------------------------------------------------------------------------------------------------------------------



| |  | burdens of complying with a wide variety of foreign laws and regulations related to healthcare products;
|- |  | --------------------------------------------------------------------------------------------------------



| |  | costs of localizing product and service offerings for foreign markets;
|- |  | ----------------------------------------------------------------------



| |  | business practices favoring local companies;
|- |  | --------------------------------------------



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| |  | longer payment cycles and difficulties collecting receivables through foreign legal systems;
|- |  | --------------------------------------------------------------------------------------------



| |  | difficulties in enforcing or defending agreements and intellectual property rights;
|- |  | -----------------------------------------------------------------------------------



| |  | fluctuations in foreign currency exchange rates; and
|- |  | ----------------------------------------------------



| |  | changes in foreign political or economic conditions.
|- |  | ----------------------------------------------------

We cannot ensure that one or more of these factors will not harm our business. Any material decrease in our international revenues or inability to expand our international operations would adversely
impact our revenues, results of operations and financial condition.

We have a limited operating history, have incurred significant
operating losses since inception and cannot assure you that we will achieve and sustain profitability in future periods.

We were formed in January 2000 and only recently have become profitable on a quarterly basis with respect to some of our fiscal quarters.
We achieved our first full year of profitability in 2010. To the extent that we are able to increase revenues, we expect our operating expenses will also increase as we expand our business to meet anticipated growing demand for our products; as we
devote resources to our sales, marketing and research and development activities and as we satisfy our debt service obligations. If we are unable to reduce our cost of revenues and our operating expenses, we may not achieve sustained profitability.
We expect to experience quarterly fluctuations in our revenues due to the timing of capital purchases by our customers and to a lesser degree the seasonality of disposable consumption by our customers. Additionally, expenses will fluctuate as we
make future investments in research and development, selling and marketing and general and administrative activities and as we satisfy our debt service obligations. This will cause us to experience variability in our reported earnings and losses in
future periods. You should not rely on our operating results for any prior quarterly or annual period as an indication of our future operating performance.

We have a significant amount of indebtedness. We may not be able to generate enough cash flow from our operations to service our indebtedness, and we may incur additional indebtedness in the future,
which could adversely affect our business, financial condition and results of operations.

We have a significant amount of
indebtedness, including $115.0 million of indebtedness under our 2.875% convertible senior notes due 2015, or the convertible senior notes. Our ability to make payments on, and to refinance, our indebtedness, including the convertible senior notes,
and to fund planned capital expenditures, research and development efforts, working capital, acquisitions and other general corporate purposes depends on our ability to generate cash in the future. This, to a certain extent, is subject to general
economic, financial, competitive, legislative, regulatory and other factors, some of which are beyond our control. If we do not generate sufficient cash flow from operations or if future borrowings are not available to us in an amount sufficient to
pay our indebtedness, including payments of principal upon conversion of the convertible senior notes or on their maturity or in connection with a transaction involving us that constitutes a fundamental change under the indenture governing the
convertible senior notes, or to fund our liquidity needs, we may be forced to refinance all or a portion of our indebtedness, including the convertible senior notes, on or before the maturity thereof, sell assets, reduce or delay capital
expenditures, seek to raise additional capital or take other similar actions. We may not be able to affect any of these actions on commercially reasonable terms or at all. Our ability to refinance our indebtedness will depend on our financial
condition at the time, the restrictions in the instruments governing our indebtedness and other factors, including market conditions. In addition, in the event of a default with respect to the convertible senior notes, the holders of the convertible
senior notes and/or the trustee under the indenture governing these notes may accelerate the payment of our obligations under these notes, which could have a material adverse effect on our business, financial condition and results of operations. Our
inability to generate sufficient cash flow to satisfy our debt service obligations, or to refinance or restructure our obligations on commercially reasonable terms or at all, would likely have an adverse effect, which could be material, on our
business, financial condition and results of operations.



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In addition, our significant indebtedness combined with our other financial obligations and
contractual commitments could have other important consequences. For example, it could:



| |  | make us more vulnerable to adverse changes in general U.S. and worldwide economic, industry and competitive conditions and adverse changes in
government regulation;
|- |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | limit our flexibility in planning for, or reacting to, changes in our business and our industry;
|- |  | ------------------------------------------------------------------------------------------------



| |  | place us at a competitive disadvantage compared to our competitors who have less debt; and
|- |  | ------------------------------------------------------------------------------------------



| |  | limit our ability to borrow additional amounts for working capital, capital expenditures, acquisitions, debt service requirements, execution of our
business strategy or other purposes.
|- |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Any of these factors could materially and adversely affect our
business, financial condition and results of operations. In addition, if we incur additional indebtedness, which we are not prohibited from doing under the terms of the indenture governing the convertible senior notes, the risks related to our
business and our ability to service our indebtedness would increase.

Competition from companies, particularly those that have longer
operating histories and greater resources than us, may harm our business.

The medical device industry, including the
market for IVUS and FM products, is highly competitive, subject to rapid technological change and significantly affected by new product introductions and market activities of other participants. As a result, even if the size of the IVUS and FM
market increases, we can make no assurance that our revenues will increase. In addition, as the markets for medical devices, including IVUS and FM products, develop, additional competitors could enter the market. To compete effectively, we will need
to continue to demonstrate that our products are attractive relative to alternative devices and treatments. We believe that our continued success depends on our ability to:



| |  | innovate and maintain scientifically advanced technology;
|- |  | ---------------------------------------------------------



| |  | apply our technology across products and markets;
|- |  | -------------------------------------------------



| |  | develop proprietary products;
|- |  | -----------------------------



| |  | successfully conduct, sponsor or participate in clinical studies that expand our markets;
|- |  | -----------------------------------------------------------------------------------------



| |  | obtain and maintain patent protection for our products;
|- |  | -------------------------------------------------------



| |  | obtain and maintain regulatory clearance or approvals;
|- |  | ------------------------------------------------------



| |  | manufacture cost-effectively;
|- |  | -----------------------------



| |  | successfully market our products; and
|- |  | -------------------------------------



| |  | attract and retain skilled personnel.
|- |  | -------------------------------------

With respect to our IVUS products, our biggest competitor is Boston Scientific, Inc., or Boston Scientific. Our FM products compete with the products of St. Jude Medical, Inc., or St. Jude. We also
compete in Japan with respect to IVUS products with Terumo Corporation, or Terumo. Boston Scientific, St. Jude, Terumo and other potential competitors who are substantially larger than us may enjoy competitive advantages, including:



| |  | more established distribution networks;
|- |  | ---------------------------------------



| |  | entrenched relationships with physicians;
|- |  | -----------------------------------------



| |  | products and procedures that are less expensive;
|- |  | ------------------------------------------------



| |  | broader ranges of products and services that may be sold in bundled arrangements;
|- |  | ---------------------------------------------------------------------------------



| |  | greater experience in launching, marketing, distributing and selling products;
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| |  | greater experience in obtaining and maintaining FDA and other regulatory clearances and approvals;
|- |  | --------------------------------------------------------------------------------------------------



| |  | established relationships with healthcare providers and payors; and
|- |  | -------------------------------------------------------------------



| |  | greater financial and other resources for product development, sales and marketing, acquisitions of products and companies, and intellectual property
protection.
|- |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------

For these and other reasons, we may not be able to compete successfully against our current or
potential future competitors, and sales of our IVUS and FM products may decline.

Failure to innovate may adversely impact our
competitive position and may adversely impact our product revenues.

Our future success will depend upon our ability to
innovate new products and introduce enhancements to our existing products in order to address the changing needs of the marketplace. Frequently, product development programs require assessments to be made of future clinical need and commercial
feasibility, which are difficult to predict. Customers may forego purchases of our products and purchase our competitors products as a result of delays in introduction of our new products and enhancements, failure to choose correctly among
technical alternatives or failure to offer innovative products or enhancements at competitive prices and in a timely manner. In addition, announcements of new products may result in a delay in or cancellation of purchasing decisions in anticipation
of such new products. We may not have adequate resources to introduce new products in time to effectively compete in the marketplace. Any delays in product releases may negatively affect our business.

We also compete with new and existing alternative technologies that are being used to penetrate the worldwide vascular imaging market
without using IVUS technology. These products, procedures or solutions could prove to be more effective, faster, safer or less costly than our IVUS products. Technologies such as angiography, angioscopy, multi-slice computed tomography,
intravascular magnetic resonance imaging, or MRI, electron beam computed tomography, and MRI with contrast agents are being used to image the vascular system.

We also develop and manufacture optical monitors, laser and non-laser light sources, and optical engines used in Optical Coherence Tomography, or OCT, imaging systems as well as micro-optical
spectrometers and optical channel monitors with applications in telecommunications, pharmaceutical manufacturing, high-speed industrial process control, and chemical and petrochemical processing, medical diagnostics, and scientific discovery.
Products developed by competitors based on tunable filter technology could compete on the basis of lower cost and other factors. In addition, customers may build similar functionality directly into their products, which in turn could decrease the
demand for our OCT imaging systems and related products.

The introduction of new products, procedures or clinical solutions
by competitors may result in price reductions, reduced margins, loss of market share and may render our products obsolete. We cannot guarantee that these alternative technologies will not be commercialized and become viable alternatives to our
products in the future, and we cannot guarantee that we will be able to compete successfully against them if they are commercialized.

Delays in planned product introductions may adversely affect our business and negatively impact future revenues.

We are currently developing new products as well as product enhancements with respect to our existing products. We have in the past
experienced, and may again in the future experience, delays in various phases of product development and commercial launch, including during research and development, manufacturing, limited release testing, marketing and customer education efforts.
In particular, developing and integrating products and technologies of acquired businesses is time consuming and in has in the past resulted, and may again in the future result, in longer developmental timelines than we initially anticipated. We are
currently engaged in ongoing litigation regarding our High Definition Swept Source, or HDSS, non-laser light source with



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LightLab Imaging, Inc., or LightLab, in Delaware Chancery Court. Depending on the outcome of this litigation, we may experience delays in the commercial launch of our OCT imaging systems. Any
delays in our product launches may significantly impede our ability to successfully compete in our markets and may reduce our revenues.

We and our present and future collaborators may fail to develop or effectively commercialize products covered by our present and future collaborations if:



| |  | our collaborators become competitors of ours or enter into agreements with our competitors;
|- |  | -------------------------------------------------------------------------------------------



| |  | we do not achieve our objectives under our collaboration agreements;
|- |  | --------------------------------------------------------------------



| |  | we are unable to manage multiple simultaneous product discovery and development collaborations;
|- |  | -----------------------------------------------------------------------------------------------



| |  | we develop products and processes or enter into additional collaborations that conflict with the business objectives of our other collaborators.
|- |  | ------------------------------------------------------------------------------------------------------------------------------------------------



| |  | we or our collaborators are unable to obtain patent protection for the products or proprietary technologies we develop in our collaborations; or
|- |  | ------------------------------------------------------------------------------------------------------------------------------------------------



| |  | we or our collaborators encounter regulatory hurdles that prevent commercialization of our products.
|- |  | ----------------------------------------------------------------------------------------------------

In addition, conflicts may arise with our collaborators, such as conflicts concerning the interpretation of clinical data, the
achievement of milestones, the interpretation of financial provisions or the ownership of intellectual property developed during the collaboration. If any conflicts arise with our existing or future collaborators, they may act in their
self-interest, which may be adverse to our best interest.

If we or our collaborators are unable to develop or commercialize
products, or if conflicts arise with our collaborators, we will be delayed or prevented from developing and commercializing products which will harm our business and financial results.

If the clinical studies that we sponsor or co-sponsor are unsuccessful, or clinical data from studies conducted by other industry participants are negative, we may not be able to develop or increase
penetration in identified markets and our business prospects may suffer.

We sponsor or co-sponsor several clinical
studies to demonstrate the benefits of our products in current markets where we are trying to increase use of our products and in new markets. Implementing a study is time consuming and expensive, and the outcome is uncertain. The completion of any
of these studies may be delayed or halted for numerous reasons, including, but not limited to, the following:



| |  | patients die during a clinical study for a variety of reasons that may or may not be related to our products, including the advanced stage of their
disease or other medical problems;
|- |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | regulatory inspections of manufacturing facilities, which may, among other things, require us or a co-sponsor to undertake corrective action or suspend
the clinical studies;
|- |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | changes in governmental regulations or administrative actions;
|- |  | --------------------------------------------------------------



| |  | patients experience adverse side effects, including adverse side effects to our or a co-sponsors drug candidate or device;
|- |  | ---------------------------------------------------------------------------------------------------------------------------



| |  | the FDA institutional review boards or other regulatory authorities do not approve a clinical study protocol or place a clinical study on hold;
|- |  | -----------------------------------------------------------------------------------------------------------------------------------------------



| |  | patients do not enroll in a clinical study or do not follow-up at the expected rate;
|- |  | ------------------------------------------------------------------------------------



| |  | our co-sponsors do not perform their obligations in relation to the clinical study or terminate the study;
|- |  | ----------------------------------------------------------------------------------------------------------



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| |  | third-party clinical investigators do not perform the clinical studies on the anticipated schedule or consistent with the clinical study protocol and
good clinical practices, or other third-party organizations do not perform data collection and analysis in a timely or accurate manner; and
|- |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | the interim results of the clinical study are inconclusive or negative, and the study design, although approved and completed, is inadequate to
demonstrate safety and efficacy of our products.
|- |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Some of the studies that we co-sponsor are designed to
study the efficacy of a third-partys drug candidate or device. Such studies are designed and controlled by the third-party and the results of such studies will largely depend upon the success of the third-partys drug candidate or device.
These studies may be terminated before completion for reasons beyond our control such as adverse events associated with a third-party drug candidate or device. A failure in such a study may have an adverse impact on our business by either the
attribution of the studys failure to our technology or our inability to leverage publicity for proper functionality of our products as part of a failed study.

Clinical studies may require the enrollment of large numbers of patients, and suitable patients may be difficult to identify and recruit. Patient enrollment in clinical studies and completion of patient
follow-up depend on many factors, including the size of the patient population, the study protocol, the proximity of patients to clinical sites, eligibility criteria for the study and patient compliance. For example, patients may be discouraged from
enrolling in our clinical studies if the applicable protocol requires them to undergo extensive post-treatment procedures or if they are persuaded to participate in different contemporaneous studies conducted by other parties. Delays in patient
enrollment or failure of patients to continue to participate in a study may result in an increase in costs, delays or the failure of the study. Such events may have a negative impact on our business by making it difficult to penetrate or expand
certain identified markets. Further, if we are forced to contribute greater financial and clinical resources to a study, valuable resources will be diverted from other areas of our business.

Negative results from clinical studies conducted by other industry participants could harm our results. For example, recently the number
of percutaneous interventional, or PCI, procedures declined due to concerns attributed to late stent thrombosis and the long-term efficacy of drug-eluting stents. If the number of PCI procedures continues to decline, the need for IVUS procedures
could also decline and our business prospects may suffer.

If we choose to acquire new businesses, products or technologies, we may
experience difficulty in the identification or integration of any such acquisition, and our business may suffer.

Our
success depends on our ability to continually enhance and broaden our product offerings in response to changing customer demands, competitive pressures and technologies. Accordingly, we have acquired, and may in the future acquire, complementary
businesses, products or technologies instead of developing them ourselves. We do not know if we will identify or complete any additional acquisitions, or whether we will be able to successfully integrate any acquired business, product or technology
or retain key employees. Integrating any business, product or technology we acquire could be expensive and time consuming, disrupt our ongoing business and distract our management. If we are unable to integrate any acquired businesses, products or
technologies effectively, our business will suffer. We have entered, and may in the future enter, markets through our acquisitions that we are not familiar with and have no experience managing. If we fail to integrate these operations into our
business, our resources may be diverted from our core business and this could have a material adverse effect on our business, financial condition and results of operations.

Our business has become more decentralized geographically through our acquisitions and this may expose us to operating inefficiencies across these diverse locations, including difficulties and
unanticipated expenses related to the integration of departments, information technology systems, and accounting records and maintaining uniform standards, such as internal controls, procedures and policies. In addition, we have, and in the future
may increase, our exposure to risks related to business operations outside the U.S. due to our acquisitions.



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We may also encounter risks, costs and expenses associated with any undisclosed or other
unanticipated liabilities or use more cash and other financial resources on integration and implementation activities than we expect. In addition, any amortization or other charges resulting from acquisitions could negatively impact our operating
results.

If our products and technologies are unable to adequately identify the plaque that is most likely to rupture and cause a
coronary event, we may not be able to develop a market for our vulnerable plaque products or expand the market for existing products.

We are utilizing substantial resources toward developing products and technologies to aid in the identification, diagnosis and treatment of the plaque that is most likely to rupture and cause a coronary
event, or vulnerable plaque. The PROSPECT study demonstrated the ability of IVUS and virtual histology, or VH, to stratify lesions according to risk. However, no randomized controlled trial has been performed to assess the benefit of treating or
deferring treatment in these stratified lesions. If we are unable to develop products or technologies that can identify vulnerable plaque, a market for products to identify vulnerable plaque may not materialize and our business may suffer.

Fluctuations in foreign currency exchange rates could result in declines in our reported revenues and earnings.

We do not engage in foreign currency hedging arrangements for our revenues or operating expenses, and, consequently, foreign currency
fluctuations may adversely affect our revenues and earnings. During the year ended December 31, 2010, 16.1% and 26.9% of our revenues were denominated in the euro and yen, respectively, 9.6% of our operating expenses were denominated in the
euro and 12.5% of our operating expenses were denominated in the yen. Commencing October 2009, we did begin using foreign exchange forward contracts to manage a portion of the foreign currency risk related to our intercompany receivable balances
with our foreign subsidiaries whose functional currencies are the euro and yen. We cannot be assured our hedges will be effective or that the costs of the hedges will not exceed their benefits. Fluctuations in the rate of exchange between the U.S.
dollar and foreign currencies, primarily the euro and the yen, could result in material amounts of cash being required to settle the hedge transactions or could adversely affect our financial results. In periods of a strengthening U.S. dollar
relative to the yen or the euro, we would record less revenues and our results of operations could be negatively impacted.

General
national and worldwide economic conditions may materially and adversely affect our financial performance and results of operations.

Our operations and performance depend significantly on national and worldwide economic conditions and the resulting impact on purchasing decisions and the level of spending on our products by customers in
the geographic markets in which our IVUS and FM products are sold or distributed. These economic conditions remain challenging in many countries and regions, including without limitation the U.S., Japan, Europe, Middle East and Africa, where we have
generated most of our revenues. If our customers do not obtain or do not have access to the necessary capital to operate their businesses, or are otherwise adversely affected by the deterioration in national and worldwide economic conditions, this
could result in reductions in the sales of our products, longer sales cycles and slower adoption of new technologies by our customers, which would materially and adversely affect our business. In addition, our customers, distributors and
suppliers liquidity, capital resources and credit may be adversely affected by their relative ability or inability to obtain capital and credit, which could adversely affect our ability to collect on our outstanding invoices or lengthen our
collection cycles, distribute our products or limit our timely access to important sources of raw materials necessary for the manufacture of our consoles and catheters.

In addition, we have invested our excess cash in money market funds and corporate debt securities issued by banks and corporations. The interest paid on these types of investments and the value of certain
securities may



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decline. While our investment portfolio has experienced reduced yields, we have not yet experienced a deterioration of the credit quality of our holdings or other material adverse effects. There
can be no assurances that our investment portfolio will not experience any such deterioration in credit quality or other material adverse effects in future periods, or that national and worldwide economic conditions will not worsen.

Our efforts to continue our transition to a direct sales force in Japan may not be successful or may cause us to incur additional expenses and
experience reduced revenues sooner than initially planned. If we are not successful or incur such additional expenses sooner than expected, then our business and results of operations may be materially and adversely affected.

Historically, a significant portion of our annual revenues have been derived from sales to our Japanese distributors.
We have recently terminated a number of our distributor relationships in Japan, and, although we have no current plans to do so, may decide in the future to fully transition to a direct sales force in Japan. There is no assurance that we will be
successful in completing our transition to a direct sales force in Japan and that we will be able to continue to successfully place, sell and service our products in Japan through a direct sales force or to successfully insure the growth of our
direct sales force that may be needed in the event we terminate additional distributor relationships. Our challenges and potential risks in connection with expanding our direct sales force in Japan include, but are not limited to, (a) the
successful retention and servicing of current distributors and customers in Japan, (b) strong market adoption of our technology in Japan, (c) the achievement of our growth and market development strategies in Japan, and (d) our
ability to recruit, train and retain an expanded direct sales force in Japan. In addition, to the extent we terminate additional relationships with distributors; we may incur significant additional expenses and reduced revenues sooner than initially
planned. Our efforts to successfully expand our direct sales strategy in Japan or the failure to achieve our sales objectives in Japan may adversely impact our revenues, results of operations and financial condition and negatively impact our ability
to sustain and grow our business in Japan.

Our manufacturing operations are dependent upon third party suppliers, some of which are
sole-sourced, which makes us vulnerable to supply problems, price fluctuations and manufacturing delays.

We rely on a
number of sole source suppliers to supply transducers, substrates and processing for our scanners used in our catheters. We do not carry significant inventory of transducers, substrates or scanner subassemblies. If we had to change suppliers, we
expect that it would take six to 24 months to identify appropriate suppliers, complete design work and undertake the necessary inspections and testing before the new transducers and substrates would be available. We are not parties to supply
agreements with these suppliers but instead use purchase orders as needed.

Our reliance on these sole source suppliers
subjects us to a number of risks that could impact our ability to manufacture our products and harm our business, including:



| |  | inability to obtain adequate supply in a timely manner or on commercially reasonable terms;
|- |  | -------------------------------------------------------------------------------------------



| |  | interruption or delayed delivery of supply resulting from our suppliers difficulty in accessing financial or credit markets or otherwise secure
cash and capital resources;
|- |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | interruption of supply resulting from modifications to, or discontinuation of, a suppliers operations;
|- |  | -------------------------------------------------------------------------------------------------------



| |  | delays in product shipments resulting from uncorrected defects, reliability issues or a suppliers variation in a component;
|- |  | ----------------------------------------------------------------------------------------------------------------------------



| |  | uncorrected quality and reliability defects that impact performance, efficacy and safety of products from replacement suppliers;
|- |  | --------------------------------------------------------------------------------------------------------------------------------



| |  | price fluctuations due to a lack of long-term supply arrangements with our suppliers for key components;
|- |  | --------------------------------------------------------------------------------------------------------



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| |  | difficulty identifying and qualifying alternative suppliers for components in a timely manner;
|- |  | ----------------------------------------------------------------------------------------------



| |  | production delays related to the evaluation and testing of products from alternative suppliers and corresponding regulatory qualifications; and
|- |  | -----------------------------------------------------------------------------------------------------------------------------------------------



| |  | delays in delivery by our suppliers due to changes in demand from us or their other customers.
|- |  | ----------------------------------------------------------------------------------------------

In addition, because we do not have long term supply agreements with some of our suppliers, we are subjected to the following risks:



| |  | unscheduled price increases;
|- |  | ----------------------------



| |  | lack of notice when the materials used to manufacture are not available;
|- |  | ------------------------------------------------------------------------



| |  | lack of notice of discontinued operations or manufacturing;
|- |  | -----------------------------------------------------------

We also utilize lean manufacturing processes that attempt to optimize the timing of our inventory purchases and supply levels of our inventories. Any significant delay or interruption in the supply of
components or materials, or our inability to obtain substitute components or materials from alternate sources at acceptable prices and in a timely manner or to plan for sufficient inventory, could impair our ability to manufacture our products or
meet the demand of our customers and harm our business. Identifying and qualifying additional or replacement suppliers for any of the components or materials used in our products, or obtaining additional inventory, if required, may not be
accomplished quickly or at all and could involve significant additional costs. Any supply interruption from our suppliers or failure to obtain additional suppliers for any of the components or materials used to manufacture our products or sufficient
inventory would limit our ability to manufacture our products and could therefore have a material adverse effect on our business, financial condition and results of operations.

We recently announced plans to expand our manufacturing capacity by constructing facilities in Costa Rica. We may encounter a number of challenges relating to the construction, management and
operation of such facilities, and the expansion has and will continue to increase our fixed costs, which may have a negative impact on our financial results and condition.

On September 23, 2010, we, through a wholly owned subsidiary, entered into a series of agreements to acquire real property and design
and build manufacturing facilities in Costa Rica. We have never established or operated manufacturing facilities outside the U.S., and cannot assure you that we will be able to successfully establish or operate these facilities in a timely or
profitable manner, or at all. We depend upon Zona Franca Coyol, a third party construction company, to assist us in the design, construction and validation of the manufacturing facilities. In addition, we will need to transfer our manufacturing
processes technology and know-how to our Costa Rica facilities. If we are unable to establish or operate these facilities or successfully transfer our manufacturing processes, technology and know-how in a timely and cost-effective manner, or at all,
then we may experience disruptions in our operations, which could negatively impact our business and financial results.

We
will need to obtain a number of permits and regulatory approvals prior, and subsequent, to commencing operations in such facilities. Our ability to obtain necessary permits and approvals may be subject to additional costs and possible delays beyond
what we initially plan for. In addition, our manufacturing facilities, and those of our suppliers, must comply with applicable regulatory requirements. Failure of our manufacturing facilities to comply with regulatory and quality requirements would
harm our business and our results of operations.

Our ability to operate this facility successfully will greatly depend on our
ability to hire, train and retain an adequate number of employees, in particular employees with the appropriate level of knowledge, background and skills. We will compete with several other medical device companies with manufacturing facilities in
Costa Rica to hire these skilled employees. Should we be unable to hire such employees, and an adequate number of them, our business and financial results could be negatively impacted.



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As we begin construction on these manufacturing facilities, our fixed costs will increase.
If we experience a demand in our products that exceeds our manufacturing capacity, we may not have sufficient inventory to meet our customers demands, which would negatively impact our revenues. If the demand for our products decreases or if
we do not produce the output we plan or anticipate after the facilities are operational, we may not be able to spread a significant amount of our fixed costs over the production volume, thereby increasing our per unit fixed cost, which would have a
negative impact on our financial condition and results of operations.

We also face particular commercial, jurisdictional and
legal risks associated with our proposed expansion in Costa Rica. The success of this relationship and our activities in Costa Rica in general are subject to the economic, political and legal conditions or developments in Costa Rica.

Disruptions or other adverse developments during the construction and planned operations stage of our planned Costa Rica facilities could
materially adversely affect our business. If our Costa Rica operations are disrupted for any reason, we may be forced to locate alternative manufacturing facilities, including facilities operated by third parties. Disruptions may include, but are
not limited to: changes in the legal and regulatory environment in Costa Rica; slowdowns or work stoppages within the Costa Rican customs authorities; acts of God (including but not limited to potential disruptive effects from an active volcano near
the facility or earthquakes, hurricanes and other natural disasters); and other issues associated with significant operations that are remote from our headquarters and operations centers. Additionally, continued growth in product sales could outpace
the ability of our Costa Rican operation to supply products on a timely basis or cause us to take actions within our manufacturing operations which increase costs, complexity and timing. Locating alternative facilities would be time-consuming, would
disrupt our production and cause shipment delays and could result in damage to our reputation and profitability. Additionally, we cannot assure you that alternative manufacturing facilities would offer the same cost structure as our Costa Rica
facility.

If our facilities are damaged or destroyed, we may experience delays that could negatively impact our revenues.

Our facilities may be affected by natural or man-made disasters. If one of our facilities were affected by a disaster,
we would be forced to rely on third party manufacturers or to shift production to another manufacturing facility. In such an event, we would face significant delays in manufacturing which would prevent us from being able to sell our products. In
addition, our insurance may not be sufficient to cover all of the potential losses and may not continue to be available to us on acceptable terms, or at all.

We may require significant additional capital to pursue our growth strategy, and our failure to raise capital when needed could prevent us from executing our growth strategy.

We believe that our existing cash and cash equivalents and short-term and long-term available-for-sale investments will be sufficient to
meet our anticipated cash needs for at least the next 12 months. However, we may need to obtain additional financing to pursue our business strategy, to respond to new competitive pressures or to act on opportunities to acquire or invest in
complementary businesses, products or technologies. The timing and amount of our working capital and capital expenditure requirements may vary significantly depending on numerous factors, including:



| |  | market acceptance of our products;
|- |  | ----------------------------------



| |  | the revenues generated by our products;
|- |  | ---------------------------------------



| |  | the need to adapt to changing technologies and technical requirements, and the costs related thereto;
|- |  | -----------------------------------------------------------------------------------------------------



| |  | the costs associated with expanding our manufacturing, marketing, sales and distribution efforts;
|- |  | -------------------------------------------------------------------------------------------------



| |  | the existence and timing of opportunities for expansion, including acquisitions and strategic transactions; and
|- |  | ---------------------------------------------------------------------------------------------------------------



| |  | costs and fees associated with defending existing or potential litigation.
|- |  | --------------------------------------------------------------------------



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In addition, we are required to make periodic interest payments to the holders of our
convertible senior notes and to make payments of principal upon conversion or maturity. We may also be required to purchase the convertible senior notes for cash upon the occurrence of a change of control or certain other fundamental changes
involving us. If our capital resources are insufficient to satisfy our debt service or liquidity requirements, we may seek to sell additional equity or debt securities or to obtain debt financing. The sale of additional equity or debt securities, or
the use of our stock in an acquisition or strategic transaction, would result in additional dilution to our stockholders. Additional debt would result in increased expenses and could result in covenants that would restrict our operations. We have
not made arrangements to obtain additional financing and our significant historical losses and the current national and global financial conditions may prevent us from obtaining additional funds on favorable terms, if at all.

We are dependent on our collaborations, and events involving these collaborations or any future collaborations could delay or prevent us from
developing or commercializing products.

The success of our current business strategy and our near- and long-term
viability will depend on our ability to execute successfully on existing strategic collaborations and to establish new strategic collaborations. Collaborations allow us to leverage our resources and technologies and to access markets that are
compatible with our own core areas of expertise. To penetrate our target markets, we may need to enter into additional collaborative agreements to assist in the development and commercialization of future products. Establishing strategic
collaborations is difficult and time-consuming. Potential collaborators may reject collaborations based upon their assessment of our financial, regulatory or intellectual property position or our internal capabilities. Our discussions with potential
collaborators may not lead to the establishment of new collaborations on favorable terms or at all.

We have collaborations
with a number of entities, including Medtronic, Inc., The Cleveland Clinic Foundation, General Electric Company, Siemens AG and Koninklijke Philips Electronics N.V. In each collaboration, we combine our technology or core capabilities with those of
the third party to permit either greater penetration into markets or to enhance the functionality of our current and planned products. We have limited control over the amount and timing of resources that our current collaborators or any future
collaborators devote to our collaborations or potential products. These collaborators may breach or terminate their agreements with us or otherwise fail to conduct their collaborative activities successfully and in a timely manner. Further, our
collaborators may not develop or commercialize products that arise out of our collaborative arrangements or devote sufficient resources to the development, manufacture, marketing or sale of these products. Moreover, in the event of termination of a
collaboration agreement, we may not realize the intended benefits or we may not be able to replace the arrangement on comparable terms or at all.

If the third-party distributors that we rely on to market and sell our products are not successful, we may be unable to increase or maintain our level of revenues.

A portion of our revenue is generated by our third-party distributors, especially in international markets. If these distributors cease or
limit operations or experience a disruption of their business operations, or are not successful in selling our products, we may be unable to increase or maintain our level of revenues, and any such developments could negatively affect our
international sales strategy. Over the long term, we intend to grow our business internationally, and to do so we will need to attract additional distributors to expand the territories in which we do not directly sell our products. Our distributors
may not commit the necessary resources to market and sell our products. If current or future distributors do not continue to distribute our products or do not perform adequately or if we are unable to locate distributors in particular geographic
areas, we may not realize revenue growth internationally.



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Our reported or future financial results could be adversely affected by the application of existing or
future accounting standards.

U.S. generally accepted accounting principles and related implementation guidelines and
interpretations can be highly complex and involve subjective judgments. Changes in these rules or their interpretation, the adoption of new guidance or the application of existing guidance to changes in our business could have a significant adverse
effect on our financial results. For example, the accounting for convertible debt securities, and the accounting for the convertible note hedge transactions and the warrant transactions we entered into in connection with the offering of the
convertible senior notes, is subject to frequent scrutiny by the accounting regulatory bodies and is subject to change. We cannot predict if or when any such change could be made and any such change could have an adverse impact on our reported or
future financial results. In addition, in the event the conversion features of the convertible senior notes are triggered, we could be required under applicable accounting standards to reclassify all or a portion of the outstanding principal of the
convertible senior notes as a current rather than long-term liability, which would result in a material reduction of our net working capital.

If we achieve sustained profitability and there is an ownership change, we cannot assure you that our net operating losses will be available to
reduce our tax liability.

Our ability to use our net operating losses to reduce future income tax obligations may be
limited or reduced. Generally, a change of more than 50 percentage points in the ownership of our shares, by value, over the three-year period ending on the date the shares were acquired constitutes an ownership change and may limit our ability to
use our net operating loss carryforwards. Should additional ownership changes occur in the future, our ability to utilize net operating loss carryforwards could be limited.

If we fail to properly manage our anticipated growth, our business could suffer.

Rapid growth of our business is likely to continue to place a significant strain on our managerial, operational and financial resources and systems. To execute our anticipated growth successfully, we must
attract and retain qualified personnel and manage and train them effectively. We anticipate hiring additional personnel to assist in the commercialization of our current products and in the development of future products. We will be dependent on our
personnel and third parties to effectively market and sell our products to an increasing number of customers. We will also depend on our personnel to develop and manufacture in anticipated increased volumes our existing products, as well as new
products and product enhancements. Further, our anticipated growth will place additional strain on our suppliers resulting in increased need for us to carefully monitor for quality assurance. Any failure by us to manage our growth effectively could
have an adverse effect on our ability to achieve our development and commercialization goals.

Issues arising from the implementation of
our new enterprise resource planning system could adversely affect our operating results and ability to manage our business effectively.

We have begun implementing a new enterprise resource planning, or ERP, system to further enhance operating efficiencies and provide more effective management of our business operations. The
new ERP system will be deployed for use throughout our company in a number of go live phases, the first of which is expected to occur during the third quarter of 2011 with company-wide deployment expected to be completed subsequently.
Implementing a new ERP system is costly and involves risks inherent in the conversion to a new computer system, including loss of information, disruption to our normal operations, changes in accounting procedures and internal control over financial
reporting, as well as problems achieving accuracy in the conversion of electronic data. Failure to properly or adequately address these issues could result in increased costs, the diversion of managements and employees attention and
resources and could materially adversely affect our operating results, internal controls over financial reporting and ability to manage our business effectively. While the ERP system is intended to further improve and enhance our information
systems, large scale implementation of a new information system exposes us to the risks of starting up the new system and integrating that system with our existing systems and processes, including possible disruption of our financial reporting,
which could lead to a failure to make required filings under the federal securities laws on a timely basis.



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If we are unable to recruit, hire and retain skilled and experienced personnel, our ability to
effectively manage and expand our business will be harmed.

Our success largely depends on the skills, experience and
efforts of our officers and other key employees who may terminate their employment at any time. The loss of any of our senior management team, in particular our President and Chief Executive Officer, R. Scott Huennekens, could harm our business. We
have entered into employment contracts or similar agreements with R. Scott Huennekens; our Chief Financial Officer, John T. Dahldorf; our Executive Vice President, Global Sales, Jorge J. Quinoy; and Michel Lussier, President of Volcano Europe and
Clinical and Scientific Affairs, Advanced Imaging Systems, Scientific Affairs, and EMEA, but these agreements do not guarantee that they will remain employed by us in the future. The announcement of the loss of one of our key employees could
negatively affect our stock price. Our ability to retain our skilled workforce and our success in attracting and hiring new skilled employees will be a critical factor in determining whether we will be successful in the future. We face challenges in
hiring, training, managing and retaining employees in certain areas including clinical, technical, sales and marketing. This could delay new product development and commercialization, and hinder our marketing and sales efforts, which would adversely
impact our competitiveness and financial results.

The expense and potential unavailability of insurance coverage for our company,
customers or products may have an adverse effect on our financial position and results of operations.

While we
currently have insurance for our business, property, directors and officers, and products, insurance is increasingly costly and the scope of coverage is narrower, and we may be required to assume more risk in the future. If we are subject to claims
or suffer a loss or damage in excess of our insurance coverage, we will be required to cover the amounts outside of or in excess of our insurance limits. If we are subject to claims or suffer a loss or damage that is outside of our insurance
coverage, we may incur significant costs associated with loss or damage that could have an adverse effect on our financial position and results of operations. Furthermore, any claims made on our insurance policies may impact our ability to obtain or
maintain insurance coverage at reasonable costs or at all. We do not have the financial resources to self-insure, and it is unlikely that we will have these financial resources in the foreseeable future.

Our product liability insurance covers our products and business operations, but we may need to increase and expand this coverage
commensurate with our expanding business. Any product liability claims brought against us, with or without merit, could result in:



| |  | substantial costs of related litigation or regulatory action;
|- |  | -------------------------------------------------------------



| |  | substantial monetary penalties or awards;
|- |  | -----------------------------------------



| |  | decreased demand for our products;
|- |  | ----------------------------------



| |  | reduced revenue or market penetration;
|- |  | --------------------------------------



| |  | injury to our reputation;
|- |  | -------------------------



| |  | withdrawal of clinical study participants;
|- |  | ------------------------------------------



| |  | an inability to establish new strategic relationships;
|- |  | ------------------------------------------------------



| |  | increased product liability insurance rates; and
|- |  | ------------------------------------------------



| |  | an inability to secure continuing coverage.
|- |  | -------------------------------------------

Some of our customers and prospective customers may have difficulty in procuring or maintaining liability insurance to cover their operation and use of our products. Medical malpractice carriers are
withdrawing coverage in certain regions or substantially increasing premiums. If this trend continues or worsens, our customers may discontinue using our products and potential customers may opt against purchasing our products due to the cost or
inability to procure insurance coverage.



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Risks related to government regulation

If we fail to obtain or maintain, or experience significant delays in obtaining, regulatory clearances or approvals for our products or product
enhancements, our ability to commercially distribute and market our products could suffer.

Our products are subject to
rigorous regulation by the FDA and numerous other federal, state and foreign governmental authorities. Our failure to comply with such regulations or to make adequate, timely corrections, could lead to the imposition of injunctions, suspensions or
loss of marketing clearances or approvals, product recalls, manufacturing cessation, termination of distribution, product seizures, civil penalties, or some combination of such actions. The process of obtaining regulatory authorizations to market a
medical device, particularly from the FDA, can be costly and time consuming, and there can be no assurance that such authorizations will be granted on a timely basis, if at all. In particular, the FDA permits commercial distribution of a new medical
device only after the device has received clearance of a premarket notification submission, referred to as a 510(k), or the approval of a premarket approval application, referred to as a PMA. We cannot guarantee the length of time the FDA will take
to review a 510(k) or a PMA submission; nor can we guarantee that the FDA will clear or approve such submissions. If regulatory clearance or approvals are received, additional delays may occur related to manufacturing, distribution, or product
labeling. In addition, we cannot assure you that any new or modified medical devices we develop will be eligible for the shorter 510(k) clearance process as opposed to the PMA process. We have no experience in obtaining PMA approvals.

In the member states of the European Economic Area, or EEA, our medical devices are required to comply with the essential requirements of
the EU Medical Devices Directives before they can be marketed. Our products, including their design and manufacture, have been certified by the British Standards Institute, or BSI, a United Kingdom Notified Body, as being compliant with the
requirements of the Medical Devices Directives. Consequently, we are entitled to affix a CE mark to our products and their packaging and this gives us the right to sell them in the EEA. If we fail to maintain compliance with the Medical Devices
Directives, our products will no longer qualify for the CE mark and the relevant devices would not be eligible for marketing in the EEA.

We currently market our IVUS and FM products in Japan under two types of regulatory approval known as a SHONIN and a NINSHO. As the holder of the SHONINs, we have the authority to import and sell those
products for which we have the SHONINs as well as those products for which we have obtained a NINSHO. Responsibility for Japanese regulatory filings and future compliance resides with us. We cannot guarantee that we will be able to adequately meet
Japanese regulatory requirements. Non-compliance with Japanese regulations may result in action to prohibit further importation and sale of our products in Japan, a significant market for our products. If we are unable to sell our IVUS and FM
products in Japan, we will lose a significant part of our annual revenues, and our business will be substantially impacted.

Foreign governmental authorities that regulate the manufacture and sale of medical devices have become increasingly stringent, and to the
extent we continue to market and sell our products in foreign countries, we will be subject to rigorous regulation in the future. In such circumstances, where we utilize distributors in foreign countries to market and sell our products, we would
rely significantly on our distributors to comply with the varying regulations, and any failures on their part could result in restrictions on the sale of our products in foreign countries. Regulatory delays or failures to obtain and maintain
marketing authorizations, including 510(k) clearances and PMA approvals, could disrupt our business, harm our reputation, and adversely affect our sales.

Modifications to our products may require new regulatory clearances or approvals or may require us to recall or cease marketing our products until clearances or approvals are obtained.

Modifications to our products may require the submission of new 510(k) notifications, PMA applications, or other
documents. If a modification is implemented to address a safety concern, we may also need to initiate a recall or cease distribution of the affected device. In addition, if the modified devices require the submission of a



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510(k) or PMA and we distribute such modified devices without a new 510(k) clearance or PMA approval, we may be required to recall or cease distributing the devices. The FDA requires device
manufacturers to initially make and document a determination of whether or not a modification requires a premarket submission and if it does, whether the submission should be a new PMA, PMA supplement, or 510(k). A marketing submission is not
required for a modification that a manufacturer determines does not significantly affect safety or efficacy and does not represent a major change in its intended use. However, the FDA can review a manufacturers decision and may disagree. The
FDA may also on its own initiative determine that clearance of a new 510(k) or approval of a new PMA submission is required. We have made modifications to our products in the past and may make additional modifications in the future that we believe
do not or will not require clearance of a new 510(k) or approval of a new PMA. If we begin manufacture and distribution of the modified devices and the FDA later disagrees with our determination and requires the submission of a new 510(k) or PMA for
the modifications, we may also be required to recall the distributed modified devices and to stop distribution of the modified devices, which could have an adverse effect on our business. If the FDA does not clear or approve the modified devices, we
may need to redesign the devices, which could also harm our business. When a device is marketed without a required clearance or approval, the FDA has the authority to bring an enforcement action, including injunction, seizure and, in egregious
circumstances, criminal prosecution. The FDA considers such additional actions generally when there is a serious risk to public health or safety and the companys corrective and preventive actions are inadequate to address the FDAs
concerns.

If a manufacturer determines that a modification to an FDA-cleared device could significantly affect its safety or
effectiveness, or would constitute a major change in its intended use, then the manufacturer must seek and obtain clearance of a new 510(k) or, if applicable, an approval of a new PMA or PMA supplement. Where we determine that modifications to our
products require clearance of a new 510(k) or approval of a new PMA or PMA supplement, we may not be able to obtain those additional clearances or approvals for the modifications or additional indications in a timely manner, or at all. For those
products sold in the EEA, we must notify BSI, our EEA Notified Body, if significant changes are made to the products or if there are substantial changes to our quality assurance systems affecting those products. Delays in obtaining required future
clearances or approvals would adversely affect our ability to introduce new or enhanced products in a timely manner, which in turn would harm our future growth.

The FDA is reviewing the 510(k) process and could change the criteria to obtain clearance which could affect our ability to obtain timely reviews and increase the resources needed to meet new
criteria.

Over the past several years, concerns have been raised about whether the 510(k) program optimally achieves
its intended goals. The FDA released for public comment in August 2010 a set of preliminary reports and recommendations from an internal 510(k) Working Group and Task Force on the Utilization of Science in Regulatory Decision Making. In January
2011, the FDA announced twenty-five action items it intends to take with respect to the pre-market notification process. Although the FDA has not detailed the specific modifications or clarifications that it intends to make to its guidance, policies
and regulations pertaining to the review and regulation of devices such as ours which seek and receive market clearance through the 510(k) pre-market notification process, the FDAs announced action items signal that additional regulatory
requirements are likely. These reforms, when implemented, could impose additional regulatory requirements upon us which could delay our ability to obtain new clearances, increase the costs of compliance, or restrict our ability to maintain our
current clearances. In the future, FDA will announce which recommended improvements it will implement, and the timeline for their implementation. As part of this review, the Institute of Medicine, or IOM, is conducting an independent review of the
510(k) program, and is expected to make its recommendations in summer 2011.

If the FDA makes changes to the 510(k) program,
whether from its own or the IOMs recommendations, we may be required to prepare and submit more data and information than is currently required, which could require additional resources and more expense, require more time to prepare a
submission, and result in a longer review period by the FDA. Such changes could adversely affect our business.



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If we or our suppliers fail to comply with the FDAs Quality System Regulation or ISO Quality
Management Systems, manufacturing of our products could be negatively impacted and sales of our products could suffer.

Our manufacturing practices must be in compliance with the FDAs 21 CFR Part 820 Quality System Regulation, or QSR, which governs the
facilities, methods, controls, procedures, and records of the design, manufacture, packaging, labeling, storage, shipping, installation, and servicing of our products intended for human use. We are also subject to similar state and foreign
requirements and licenses, including the MDD93/42/EEC and the ISO 13485 Quality Management Systems, or QMS, standard applicable to medical devices. In addition, we must engage in regulatory reporting in the case of potential patient safety
risks and must make available our manufacturing facilities, procedures, and records for periodic inspections and audits by governmental agencies, including the FDA, state authorities and comparable foreign agencies. If we fail to comply with the
QSR, QMS, or other applicable regulations and standards, our operations could be disrupted and our manufacturing interrupted, and we may be subject to enforcement actions if our corrective and preventive actions are not adequate to ensure
compliance.

Failure to take adequate corrective action in response to inspectional observations or any notice of deficiencies
from a regulatory inspection or audit could result in partial or total shut-down of our manufacturing operations unless and until adequate corrections are implemented, voluntary or FDA-ordered recall, FDA seizure of affected devices, court-ordered
injunction or consent decree that could impose additional regulatory oversight and significant requirements and limitations on our manufacturing operations, significant fines, suspension or withdrawal of marketing clearances and approvals, and
criminal prosecutions, any of which would cause our business to suffer. Furthermore, our key component suppliers may not currently be or may not continue to be in compliance with applicable regulatory requirements, which may result in manufacturing
delays for our products and cause our revenue to decline.

The FDA, BSI, Japans Pharmaceutical & Medical Device
Administration, or PMDA, and other regulatory agencies and bodies have previously imposed inspections and audits on us, and may in the future impose additional inspections or audits at any time which may conclude that our quality system is
noncompliant with applicable regulations and standards. Such findings could potentially disrupt our business, harm our reputation and adversely affect our sales.

Our products may in the future be subject to product recalls or voluntary market withdrawals that could harm our reputation, business and financial results.

The FDA and similar foreign governmental authorities have the authority to require the recall of commercialized products in the event of
material deficiencies or defects in design or manufacture that could affect patient safety. In the case of the FDA, the authority to require a recall must be based on an FDA finding that there is a reasonable probability that the device would cause
serious adverse health consequences or death. Manufacturers may, under their own initiative, recall a product if any material deficiency in a device is found or suspected. For example, we recently recalled our Xtract catheter in circumstances
where no patient safety incident was reported but where we had evidence that the devices integrity could be compromised under certain storage conditions. A government-mandated recall or voluntary recall by us or one of our distributors could
occur as a result of component failures, manufacturing errors, design or labeling defects or other issues. Recalls, which include corrections as well as removals, of any of our products would divert managerial and financial resources and could have
an adverse effect on our financial condition, harm our reputation with customers, and reduce our ability to achieve expected revenues.

We are required to comply with medical device reporting, or MDR, requirements and must report certain malfunctions, deaths, and serious injuries
associated with our products, which can result in voluntary corrective actions or agency enforcement actions.

Under
the FDA MDR regulations, medical device manufacturers are required to submit information to the FDA when they receive a report or become aware that a device has or may have caused or contributed to a death



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or serious injury or has or may have a malfunction that would likely cause or contribute to death or serious injury if the malfunction were to recur. All manufacturers placing medical devices on
the market in the EEA are legally bound to report any serious or potentially serious incidents involving devices they produce or sell to the Competent Authority in whose jurisdiction the incident occurred. Were this to happen to us, the relevant
Competent Authority would file an initial report, and there would then be a further inspection or assessment if there are particular issues. This would be carried out either by the Competent Authority or it could require that the BSI, as the
Notified Body, carry out the inspection or assessment.

Malfunction of our products could result in future voluntary
corrective actions, such as recalls, including corrections, or customer notifications, or agency action, such as inspection or enforcement actions. Malfunctions have been reported to us in the past, and, while we investigated each of the incidents
and believe we have taken the necessary corrective and preventive actions, we cannot guarantee that similar or different malfunctions will not occur in the future. If malfunctions do occur, we cannot guarantee that we will be able to correct the
malfunctions adequately or prevent further malfunctions, in which case we may need to cease manufacture and distribution of the affected devices, initiate voluntary recalls, and redesign the devices; nor can we ensure that regulatory authorities
will not take actions against us, such as ordering recalls, imposing fines, or seizing the affected devices. If someone is harmed by a malfunction or by product mishandling, we may be subject to product liability claims. Any corrective action,
whether voluntary or involuntary, as well as defending ourselves in a lawsuit, will require the dedication of our time and capital, distract management from operating our business, and may harm our reputation and financial results.

We are subject to federal, state and foreign healthcare laws and regulations and implementation or changes to such healthcare laws and regulations
could adversely affect our business and results of operations.

In an effort to contain rising healthcare costs, in
March 2010, President Obama signed into law the Patient Protection and Affordable Care Act, as amended by the Health Care and Education Affordability Reconciliation Act, collectively, the PPACA, which may significantly affect the payment for, and
the availability of, healthcare services and result in fundamental changes to federal healthcare reimbursement programs. The PPACA includes, among other things, the following measures:



| |  | a deductible 2.3% excise tax on any entity that manufactures or imports medical devices offered for sale in the U.S., with limited exceptions,
effective 2013;
|- |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | a new Patient-Centered Outcomes Research Institute to oversee, identify priorities in and conduct comparative clinical effectiveness research;
|- |  | ----------------------------------------------------------------------------------------------------------------------------------------------



| |  | new reporting and disclosure requirements on device manufacturers for any transfer of value made or distributed to prescribers and other
healthcare providers, effective March 30, 2013;
|- |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | payment system reforms including a national pilot program on payment bundling to encourage hospitals, physicians and other providers to improve the
coordination, quality and efficiency of certain healthcare services through bundled payment models, beginning on or before January 1, 2013; and
|- |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | an independent payment advisory board that will submit recommendations to reduce Medicare spending if projected Medicare spending exceeds a specified
growth rate.
|- |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------

We are unable to predict at this time the impact of such recently enacted federal healthcare
reform legislation on the medical device industry in general, or on us in particular and what, if any, additional legislation or regulation relating to the medical device industry may be enacted in the future. An expansion in the governments
role in the U.S. healthcare industry may lower reimbursements for procedures using our products, reduce medical procedure volumes and adversely affect our business and results of operations. Although we cannot predict the many ways that the federal
healthcare reform laws might affect our business, we will be subject to the 2.3% excise tax scheduled to take effect in 2013. It is unclear whether and to what extent, if at all, other anticipated developments resulting from the federal healthcare
reform legislation, such as an increase in the



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number of people with health insurance and an increased focus on preventive medicine, may provide us additional revenue to offset this excise tax. If additional revenue does not materialize, or
if our efforts to offset the excise tax through spending cuts or other actions are unsuccessful, the increased tax burden would adversely affect our financial performance, which in turn could cause the price of our stock to decline. In addition, a
number of foreign governments are also considering or have adopted proposals to reform their healthcare systems. Because a significant portion of our revenues from our operations is derived internationally, if significant reforms are made to the
healthcare systems in other jurisdictions, our sales and results of operations may be materially and adversely impacted.

We
intend to market our products in a number of international markets. Although certain of our IVUS products have been approved for commercialization in Japan and in the EEA, in order to market our products in other foreign jurisdictions, we have had
to, and will need to in the future, obtain separate regulatory approvals. The approval procedure varies among jurisdictions and can involve substantial additional testing. Approval or clearance of a device by the FDA does not ensure approval by
regulatory authorities in other jurisdictions, and approval by one foreign regulatory authority does not ensure marketing authorization by regulatory authorities in other foreign jurisdictions or by the FDA. The foreign regulatory approval process
may include all of the risks associated with obtaining FDA approval in addition to other risks. In addition, the time required to obtain foreign approval may differ from that required to obtain FDA approval, and we may not obtain foreign regulatory
approvals on a timely basis, if at all. We may not be able to file for regulatory approvals and may not receive necessary approvals to commercialize our products in any foreign market other than in the EEA and Japan.

We may be subject to federal, state and foreign healthcare fraud and abuse laws and regulations, and a finding of failure to comply with such laws
and regulations could have a material adverse effect on our business.

Our operations may be directly or indirectly
affected by various broad federal, state or foreign healthcare fraud and abuse laws. In particular, the federal Anti-Kickback Statute prohibits any person from knowingly and willfully offering, paying, soliciting or receiving remuneration, directly
or indirectly, in return for or to induce the referring, ordering, leasing, purchasing or arranging for or recommending the ordering, purchasing or leasing of an item or service, for which payment may be made under federal healthcare programs, such
as the Medicare and Medicaid programs. The government could seek to apply the Anti-Kickback Statute to device manufacturers financial relationships with clinical trial investigators. Among other theories, the government could allege
that such relationships are payments to induce the investigators to arrange for or recommend the ordering, purchasing or leasing of the manufacturers products by the hospitals, medical institutions and other entities with whom they are
affiliated. We are also subject to the federal Health Insurance Portability and Accountability Act of 1996, (HIPAA), which created federal criminal laws that prohibit executing a scheme to defraud any health care benefit program or making false
statements relating to health care matters, and federal sunshine laws that require transparency regarding financial arrangements with health care providers, such as the reporting and disclosure requirements imposed by PPACA on drug
manufacturers regarding any transfer of value made or distributed to prescribers and other health care providers.

Also, the federal False Claims Act prohibits persons from knowingly filing, or causing to be filed, a false claim to, or the knowing use
of false statements to obtain payment from the federal government. Suits filed under the False Claims Act, known as qui tam actions, can be brought by any individual on behalf of the government and such individuals, commonly known as
whistleblowers, may share in any amounts paid by the entity to the government in fines or settlement. When an entity is determined to have violated the False Claims Act, it may be required to pay up to three times the actual damages
sustained by the government, plus civil penalties for each separate false claim. Various states have also enacted laws modeled after the federal False Claims Act.

In addition, many states have adopted laws similar to each of the above federal laws, such as anti-kickback and false claims laws which may apply to items or services reimbursed by any third-party payor,
including commercial insurers as well as laws that restrict our marketing activities with physicians, and require us to report



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consulting and other payments to physicians. Some states, such as California, Massachusetts and Vermont, mandate implementation of commercial compliance programs to ensure compliance with these
laws.

The risk of our being found in violation of these laws is increased by the fact that many of them have not been fully
interpreted by the regulatory authorities or the courts, and their provisions are open to a variety of interpretations. Moreover, recent health care reform legislation has strengthened these laws. For example, the recently enacted PPACA, among other
things, amends the intent requirement of the federal anti-kickback and criminal health care fraud statutes; a person or entity no longer needs to have actual knowledge of this statute or specific intent to violate it. In addition, PPACA provides
that the government may assert that a claim including items or services resulting from a violation of the federal anti-kickback statute constitutes a false or fraudulent claim for purposes of the false claims statutes. Further, we expect there will
continue to be federal and state laws and/or regulations, proposed and implemented, that could impact our operations and business. The extent to which future legislation or regulations, if any, relating to health care fraud abuse laws and/or
enforcement, may be enacted or what effect such legislation or regulation would have on our business remains uncertain. If our operations are found to be in violation of any of the laws described above or any other governmental regulations that
apply to us, we may be subject to penalties, including civil and criminal penalties, damages, fines, exclusion from governmental health care programs, and the curtailment or restructuring of our operations, any of which could adversely affect our
ability to operate our business and our financial results. We also are subject to foreign fraud and abuse laws, which vary by country. For instance, in the European Union, legislation on inducements offered to physicians and other healthcare workers
or hospitals differ from country to country. Breach of the laws relating to such inducements may expose us to the imposition of criminal sanctions. It may also harm our reputation, which could in turn affect sales.

If our customers are unable to obtain coverage of or sufficient reimbursement for procedures performed with our products, it is unlikely that our
products will be widely used.

Successful sales of our products depend on the availability of adequate coverage and
reimbursement from third-party payors. Healthcare providers that purchase medical devices for treatment of their patients generally rely on third-party payors to reimburse all or part of the costs and fees associated with the procedures performed
with these devices. Both public and private insurance coverage and reimbursement plans are central to new product acceptance. Customers are unlikely to use our products if they do not receive reimbursement adequate to cover the cost of our products
and related procedures.

To the extent we sell our products internationally, market acceptance may depend, in part, upon the
availability of coverage and reimbursement within prevailing healthcare payment systems. Coverage, reimbursement, and healthcare payment systems in international markets vary significantly by country, and by region in some countries, and include
both government-sponsored healthcare and private insurance. We may not obtain international reimbursement approvals in a timely manner, if at all. Our failure to receive international coverage or reimbursement approvals would negatively impact
market acceptance of our products in the international markets in which those approvals are sought.

To date, our products
have generally been covered as part of procedures for which reimbursement has been available. However, in the U.S., as well as in foreign countries, government-funded programs (such as Medicare and Medicaid) or private insurance programs, together
commonly known as third-party payors, pay the cost of a significant portion of a patients medical expenses. Coverage of and reimbursement for medical technology can differ significantly from payor to payor.

All third-party coverage and reimbursement programs, whether government funded or insured commercially, whether inside the U.S. or
outside, are developing increasingly sophisticated methods of controlling healthcare costs. Such cost-containment programs adopted by third-party payers, including legislative and regulatory changes to coverage and reimbursement policies, could
potentially limit the amount which healthcare providers are willing to pay for medical devices, which could adversely impact our business.



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We believe that future coverage of and reimbursement for our products may be subject to
increased restrictions both in the U.S. and in international markets. Third-party reimbursement and coverage for our products may not be available or adequate in either the U.S. or international markets. Future legislation, regulations, coverage or
reimbursement policies adopted by third-party payors may adversely affect the growth of the markets for our products, reduce the demand for our existing products or our products currently under development, and limit our ability to sell our products
on a profitable basis.

We may be subject to health information privacy and security standards that include penalties for noncompliance.

The Health Insurance Portability and Accountability Act of 1996, or HIPAA, and its implementing regulations safeguard
the privacy and security of individually-identifiable health information. Certain of our operations may be subject to these requirements. Penalties for noncompliance with these rules include both criminal and civil penalties. In addition, the Health
Information Technology for Economic and Clinical Health Act, or HITECH Act, expanded federal health information privacy and security protections. Among other things, HITECH makes certain of HIPAAs privacy and security standards directly
applicable to business associatesindependent contractors or agents of covered entities that receive or obtain protected health information in connection with providing a service on behalf of a covered entity. HITECH also set forth
new notification requirements for health data security breaches, increased the civil and criminal penalties that may be imposed against covered entities, business associates and possibly other persons, and gave state attorneys general new authority
to enforce HIPAA and seek attorneys fees and costs associated with pursuing federal civil actions. Occasionally, our field service representatives enter into field service agreements which obligate us to protect any protected
health information that we may receive in the field in accordance with HIPAA and HITECH.

Compliance with environmental laws and
regulations could be expensive, and failure to comply with these laws and regulations could subject us to significant liability.

We use hazardous materials in our research and development and manufacturing processes. We are subject to federal, state and local regulations governing use, storage, handling and disposal of these
materials and associated waste products. We are currently licensed to handle such materials, but there can be no assurance that we will be able to retain these licenses in the future or obtain licenses under new regulations if and when they are
required by governing authorities. We cannot completely eliminate the risk of contamination or injury resulting from hazardous materials, and we may incur liability as a result of any such contamination or injury. In the event of an accident, we
could be held liable for damages or penalized with fines, and the liability could exceed our resources and any applicable insurance. We have also incurred and may continue to incur expenses related to compliance with environmental laws. Such future
expenses or liability could have a significant negative impact on our business, financial condition and results of operations. Further, we cannot assure that the cost of compliance with these laws and regulations will not materially increase in the
future. We may also incur expenses related to ensuring that our operations comply with environmental laws related to our operations, and those of prior owners or operators of our properties, at current or former manufacturing sites where operations
have previously resulted in spills, discharges or other releases of hazardous substances into the environment. We could be held strictly liable under U.S. environmental laws for contamination of property that we currently or formerly owned or
operated without regard to fault or whether our actions were in compliance with law at the time. Our liability could also increase if other responsible parties, including prior owners or operators of our facilities, fail to complete their clean-up
obligations or satisfy indemnification obligations to us. Similarly, if we fail to ensure compliance with applicable environmental laws in foreign jurisdictions in which we operate, we may not be able to offer our products and may be subject to
civil or criminal liabilities.

The use, misuse or off-label use of our products may result in injuries that could lead to product
liability suits, which could be costly to our business.

Our currently marketed products have been cleared by the
relevant regulatory authority in each jurisdiction where we market them. There may be increased risk of injury if physicians attempt to use our products in



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procedures outside of those indications cleared or approved for use, known as off-label use. Our sales force is trained according to company policy not to promote our products for off-label uses,
and in our instructions for use in all markets we specify that our products are not intended for use outside of those indications cleared for use. However, we cannot prevent a physician from using our products for off-label applications. Our
catheters and guide wires are intended to be single-procedure products. In spite of clear labeling and instructions against reuse, we are aware that certain physicians have elected to reuse our products. Reuse of our catheters and guide wires may
increase the risk of product liability claims. Reuse may also subject the party reusing the product to regulatory authority inspection and enforcement action. Physicians may also misuse our product if they are not adequately trained, potentially
leading to injury and an increased risk of product liability. If our products are defectively designed, manufactured or labeled, contain defective components or are misused, we may become subject to costly litigation by our customers or their
patients. Product liability claims could divert managements attention from our core business, be expensive to defend and result in sizable damage awards against us.

Risks related to our intellectual property and litigation

Our ability to protect our
intellectual property and proprietary technology through patents and other means is uncertain.

Our success depends
significantly on our ability to protect our intellectual property and proprietary technologies. Our policy is to obtain and protect our intellectual property rights. We rely on patent protection, as well as a combination of copyright, trade secret
and trademark laws, and nondisclosure, confidentiality and other contractual restrictions to protect our proprietary technology. However, these legal means afford only limited protection and may not adequately protect our rights or permit us to gain
or keep any competitive advantage. Our pending U.S. and foreign patent applications may not issue as patents or may not issue in a form that will be advantageous to us. Any patents we have obtained or will obtain may be challenged by re-examination,
opposition or other administrative proceeding, or in litigation. Such challenges could result in a determination that the patent is invalid. In addition, competitors may be able to design alternative methods or devices that avoid infringement of our
patents. To the extent our intellectual property protection offers inadequate protection, or is found to be invalid, we are exposed to a greater risk of direct competition. If our intellectual property does not provide adequate protection against
our competitors products, our competitive position could be adversely affected, as could our business. Both the patent application process and the process of managing patent disputes can be time consuming and expensive. Furthermore, the laws
of some foreign countries may not protect our intellectual property rights to the same extent as do the laws of the U.S.

In
addition to pursuing patents on our technology, we have taken steps to protect our intellectual property and proprietary technology by entering into confidentiality agreements and intellectual property assignment agreements with our employees,
consultants, corporate partners and, when needed, our advisors. Such agreements may not be enforceable or may not provide meaningful protection for our trade secrets or other proprietary information in the event of unauthorized use or disclosure or
other breaches of the agreements, and we may not be able to prevent such unauthorized disclosure. Monitoring unauthorized disclosure is difficult, and we do not know whether the steps we have taken to prevent such disclosure are, or will be,
adequate.

In the event a competitor infringes upon our patent or other intellectual property rights, litigation to enforce
our intellectual property rights or to defend our patents against challenge, even if successful, could be expensive and time consuming and could require significant time and attention from our management. We may not have sufficient resources to
enforce our intellectual property rights or to defend our patents against challenges from others.

The medical device industry is
characterized by patent and other intellectual property litigation, and we could become subject to litigation that could be costly, result in the diversion of our managements time and efforts, require us to pay damages or prevent us from
selling our products.

The medical device industry is characterized by extensive litigation and administrative
proceedings over patent and other intellectual property rights. Whether or not a product infringes a patent involves complex legal



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and factual issues, the determination of which is often uncertain. Our competitors may assert that they own U.S. or foreign patents containing claims that cover our products, their components or
the methods we employ in the manufacture or use of our products. For example, we are currently involved with St. Jude in patent litigation regarding each partys pressure guide wire products and whether these products infringe the patents of
the other party. Because patent applications can take many years to issue and in many instances at least 18 months to publish, there may be applications now pending of which we are unaware, which may later result in issued patents that contain
claims that cover our products. There could also be existing patents, of which we are unaware, that contain claims that cover one or more components of our products. As the number of participants in our industry increases, the possibility of patent
infringement claims against us also increases.

Any interference proceeding, litigation or other assertion of claims against
us may cause us to incur substantial costs, could place a significant strain on our financial resources, divert the attention of our management from our core business and harm our reputation. If the relevant patents asserted against us were upheld
as valid and enforceable and were found to be infringed, we could be required to pay substantial damages and/or royalties and could be prevented from selling our products unless we could obtain a license or were able to redesign our products to
avoid infringement. Any such license may not be available on reasonable terms, if at all. If we fail to obtain any required licenses or make any necessary changes to our products or technologies, we may be unable to make, use, sell or otherwise
commercialize one or more of our products in the affected country. In addition, if we are found to infringe willfully, we could be required to pay treble damages and attorney fees, among other penalties.

We expect to enter new product fields in the future. Entering such additional fields may subject us to claims of infringement. Defending any
infringement claims would be expensive and time consuming.

We are aware of certain third-party U.S. patents in fields
that we are targeting for development. We do not have licenses to these patents nor do we believe that such licenses are required to develop, commercialize or sell our products in these areas. However, the owners of these patents may initiate a
lawsuit alleging infringement of one or more of these or other patents. If they do, we may be required to incur substantial costs related to patent litigation, which could place a significant strain on our financial resources and divert the
attention of management from our business and harm our reputation. Adverse determinations in such litigation could cause us to redesign or prevent us from manufacturing or selling our products in these areas, which would have an adverse effect on
our business by limiting our ability to generate revenues through the sale of these products.

From time to time in the
ordinary course of business, we receive letters from third parties advising us of third-party patents that may relate to our business. The letters do not explicitly seek any particular action or relief from us. Although these letters do not threaten
legal action, these letters may be deemed to put us on notice that continued operation of our business might infringe intellectual property rights of third parties. We do not believe we are infringing any such third-party rights, and we are unaware
of any litigation or other proceedings having been commenced against us asserting such infringement. We cannot assure you that such litigation or other proceedings may not be commenced against us in the future.

Our rights to a worldwide license of certain IVUS patents owned or licensed by Boston Scientific may be challenged.

The marketing and sale of our current rotational IVUS catheters and pullback products depend on a license for IVUS-related patents owned
or licensed by Boston Scientific. Boston Scientific was required to transfer the related intellectual property rights pursuant to a 1995 order of the Federal Trade Commission. We obtained rights to the license in 2003 through our former wholly-owned
subsidiary, Pacific Rim Medical Ventures, which merged into us on December 30, 2004. In the event Boston Scientific disputes our rights to the license or seeks to terminate the license, we may be required to expend significant time and
resources defending our rights. An adverse determination could cause us to redesign or prevent us from manufacturing or selling our rotational IVUS catheters and pullback products, which would have an adverse effect on our business. Additionally, in
the



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event that the chain of title from the 1995 transfer of rights from Boston Scientific through the 2003 transfer to us is successfully challenged, we may have fewer rights to the technology than
our business requires which will negatively impact our ability to continue our development of rotational IVUS catheters and pullback products or subject us to disputes with Boston Scientific or others with respect to the incorporation of this
intellectual property into our products.

Our VH IVUS business depends on a license from The Cleveland Clinic Foundation, the loss of
which would severely impact our business.

The marketing and sale of our VH IVUS functionality for IVUS depends on an
exclusive license to patents owned by The Cleveland Clinic Foundation, the license to which we obtained in April 2002. We are aware that maintenance of the license depends upon certain provisions being met by us including payment of royalties,
commercialization of the licensed technology and obtaining regulatory clearances or approvals. If The Cleveland Clinic Foundation were to claim that we committed a material breach or default of these provisions and we were not able to cure such
breach or default, The Cleveland Clinic Foundation would have a right to terminate the agreement. The loss of the rights granted under the agreement could require us to redesign our VH IVUS functionality or prevent us from manufacturing or selling
our IVUS products containing VH IVUS in countries covered by these patents. In addition, our exclusive license shall become non-exclusive if we fail to obtain regulatory clearances or approvals to commercialize the licensed technology within a
proscribed time period. The cost of redesigning or an inability to sell our VH IVUS products would have a negative impact on our ability to grow our business and achieve our expected revenues.

Risks related to our common stock

We expect that the price of our common stock will fluctuate substantially.

The market price of our common stock could be subject to significant fluctuation. Factors that could cause volatility in the market price of our common stock include the following:



| |  | changes in earnings estimates, investors perceptions, recommendations by securities analysts or our failure to achieve analysts earnings
estimates;
|- |  | -----------------------------------------------------------------------------------------------------------------------------------------------------



| |  | quarterly variations in our or our competitors results of operations;
|- |  | ----------------------------------------------------------------------



| |  | changes in governmental regulations or in the status of our regulatory clearance or approvals;
|- |  | ----------------------------------------------------------------------------------------------



| |  | changes in availability of third-party reimbursement in the U.S. or other countries;
|- |  | ------------------------------------------------------------------------------------



| |  | the announcement of new products or product enhancements by us or our competitors;
|- |  | ----------------------------------------------------------------------------------



| |  | the announcement of an acquisition or other business combination or strategic transaction;
|- |  | ------------------------------------------------------------------------------------------



| |  | possible sales of our common stock by investors who view the convertible senior notes as a more attractive means of equity participation in us;
|- |  | -----------------------------------------------------------------------------------------------------------------------------------------------



| |  | the conversion of some or all of our convertible senior notes and any sales in the public market of shares of our common stock issued upon conversion
of the notes;
|- |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | hedging or arbitrage trading activity that may develop involving our common stock, including in connection with the convertible note hedge transaction
and warrant transaction we entered into in connection with our convertible senior notes offering and arbitrage strategies employed or that may be employed by investors in our convertible senior notes;
|- |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | announcements related to patents issued to us or our competitors;
|- |  | -----------------------------------------------------------------



| |  | the announcement of pending or threatened litigation;
|- |  | -----------------------------------------------------



| |  | sales of large blocks of our common stock, including sales by our executive officers and directors; and
|- |  | -------------------------------------------------------------------------------------------------------



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| |  | general market and economic conditions and other factors unrelated to our operating performance or the operating performance of our competitors.
|- |  | ------------------------------------------------------------------------------------------------------------------------------------------------

These factors may materially and adversely affect the market price of our common stock.

Additional equity issuances or a sale of a substantial number of shares of our common stock may cause the market price of our common stock to
decline.

If our existing stockholders sell a substantial number of shares of our common stock or the public market
perceives that existing stockholders might sell shares of our common stock, the market price of our common stock could decline. In addition, sales of a substantial number of shares of our common stock could make it more difficult for us to sell
equity or equity-related securities in the future at a time and price that we deem reasonable or appropriate. Because we may need to raise additional capital in the future to continue to expand our business and develop new products, we may, among
other things, conduct additional equity offerings. These future equity issuances, together with any additional shares of our common stock issued or issuable in connection with past or any future acquisitions, would result in further dilution to
investors and could depress the market price of our common stock.

No prediction can be made regarding the number of shares of
our common stock that may be issued or the effect that the future sales of shares of our common stock will have on the market price of our shares.

Our directors, officers and principal stockholders have significant voting power and may take actions that may not be in the best interests of our other stockholders.

As of February 15, 2011, our directors, officers and principal stockholders each holding more than 5% of our common stock
collectively controlled a significant portion of our outstanding common stock. To the extent our directors, officers and principal stockholders continue to hold a significant portion of our outstanding common stock, these stockholders, if they act
together, would be able to exert significant influence over the management and affairs of our company and most matters requiring stockholder approval, including the election of directors and approval of significant corporate transactions. This
concentration of ownership may have the effect of delaying or preventing a change in control, might adversely affect the market price of our common stock and may not be in the best interests of our other stockholders.

Anti-takeover provisions in our amended and restated certificate of incorporation and bylaws and other agreements and in Delaware law could
discourage a takeover.

Our amended and restated certificate of incorporation and bylaws and Delaware law contain
provisions that might enable our management to resist a takeover. These provisions include:



| |  | a classified board of directors;
|- |  | --------------------------------



| |  | advance notice requirements to stockholders for matters to be brought at stockholder meetings;
|- |  | ----------------------------------------------------------------------------------------------



| |  | a supermajority stockholder vote requirement for amending certain provisions of our amended and restated certificate of incorporation and bylaws; and
|- |  | -----------------------------------------------------------------------------------------------------------------------------------------------------



| |  | the right to issue preferred stock without stockholder approval, which could be used to dilute the stock ownership of a potential hostile acquirer.
|- |  | ---------------------------------------------------------------------------------------------------------------------------------------------------

We are also subject to the provisions of Section 203 of the Delaware General Corporation Law that, in
general, prohibit any business combination or merger with a beneficial owner of 15% or more of our common stock unless the holders acquisition of our stock was approved in advance by our board of directors. These provisions might discourage,
delay or prevent a change in control of our company or a change in our management. The existence of these provisions could adversely affect the voting power of holders of common stock and limit the price that investors might be willing to pay in the
future for shares of our common stock.



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We have adopted a stockholder rights plan that may discourage, delay or prevent a change of
control and make any future unsolicited acquisition attempt more difficult. Under the rights plan:



| |  | the rights will become exercisable only upon the occurrence of certain events specified in the plan, including the acquisition of 20% of our
outstanding common stock by a person or group, with limited exceptions;
|- |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | each right will entitle the holder, other than an acquiring person, to acquire shares of our common stock at a discount to the then prevailing market
price;
|- |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | our board of directors may redeem outstanding rights at any time prior to a person becoming an acquiring person at a minimal price per right; and
|- |  | -------------------------------------------------------------------------------------------------------------------------------------------------



| |  | prior to a person becoming an acquiring person, the terms of the rights may be amended by our board of directors without the approval of the holders of
the rights.
|- |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------

In addition, the terms of our convertible senior notes may require us to purchase these notes
for cash in the event of a takeover of our company. The indenture governing the convertible senior notes also prohibits us from engaging in certain mergers or acquisitions unless, among other things, the surviving entity assumes our obligations
under the notes. These and other provisions applicable to the convertible senior notes may have the effect of delaying or preventing a takeover of our company that would otherwise be beneficial to our stockholders.

We have not paid dividends in the past and do not expect to pay dividends in the future.

We have never declared or paid cash dividends on our capital stock. We currently intend to retain all future earnings for the operation
and expansion of our business and, therefore, do not anticipate declaring or paying cash dividends in the foreseeable future. The payment of dividends will be at the discretion of our board of directors and will depend on our results of operations,
capital requirements, financial condition, prospects, contractual arrangements, any limitations on payments of dividends present in our current and future debt agreements, and other factors our board of directors may deem relevant. If we do not pay
dividends, a return on our common stock will only occur if our stock price appreciates.



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|Item 1B. | Unresolved Staff Comments
|-------- | -------------------------

None



|Item 2. | Properties
|------- | ----------

The following
table summarizes our principal facilities under lease as of December 31, 2010, the location and size of each such facility and their designed use.



|                           |  |                                                                         |  |                          |         |  |      |               |                           |              
|-------------------------- |  | ----------------------------------------------------------------------- |  | ------------------------ | ------- |  | ---- | ------------- | ------------------------- | -------------
|Location                   |  | Purpose (2)                                                             |  | Square Feet(Approximate) |         |  | Term |               | Option(s) torenew through
|San Diego, California (1)  |  | Principal executive offices and research and development                |  |                          | 34,986  |  |      | July 2015     |                           | July 2018    
|Rancho Cordova, California |  | Manufacturing operations and administrative functions                   |  |                          | 75,626  |  |      | December 2014 |                           | December 2024
|Rancho Cordova, California |  | Research and development, marketing and regulatory operations           |  |                          | 144,000 |  |      | December 2014 |                           | December 2019
|Rancho Cordova, California |  | Production distribution operations                                      |  |                          | 30,015  |  |      | December 2014 |                           | December 2024
|Rancho Cordova, California |  | Shipping and receiving, quality inspection, systems refurbishment       |  |                          | 35,473  |  |      | December 2014 |                           | December 2024
|Billerica, Massachusetts   |  | Axsun operations and administrative functions, research and development |  |                          | 64,784  |  |      | October 2014  |                           | October 2019 
|Zaventem, Belgium          |  | Europe administrative functions, sales and product distribution         |  |                          | 16,027  |  |      | December 2011 |                           | n/a          
|Tokyo, Japan               |  | Japan sales operations and administrative functions                     |  |                          | 9,752   |  |      | January 2012  |                           | n/a          



|(1) | The square footage, lease terms and renewal options reflect the terms of a lease agreement executed in January 2011. As of December 31, 2010, we had 31,686 square
feet under lease through July 2015.
|--- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(2) | All facilities are utilized for activities in our medical segment. The Billerica, Massachusetts facility is utilized for activities both in our medical and industrial
segments.
|--- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

We also lease facilities in Forsyth County, Georgia and Cleveland, Ohio for various research and
development activities; Alpharetta, Georgia for limited research and development activities and sales administration activities; and Woodmead, South Africa for sales and distribution activities. Collectively, these facilities represent approximately
14,000 square feet of space. In September, 2010, we, through a wholly owned subsidiary, entered into a series of agreements to acquire real property and to design and build manufacturing facilities in Costa Rica.

We believe that our current and planned facilities are adequate to meet our needs for the foreseeable future.



|Item 3. | Legal Proceedings
|------- | -----------------

The
information set forth under Note 4 Commitments and Other Contractual Obligations  Litigation to our consolidated financial statements included in Part II, Item 8 of this Annual Report, is incorporated herein by reference.



|Item 4. | Reserved
|------- | --------



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##### Table of Contents

PART II



|Item 5. | Market for Registrants Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities
|------- | ------------------------------------------------------------------------------------------------------------

We completed our initial public offering on June 15, 2006. Our common stock is traded on the NASDAQ Global Market under the symbol
VOLC. The following table sets forth the high and low sales price of our common stock for the periods indicated.



|                             |  |             |       |  |      |   |       | 
|---------------------------- |  | ----------- | ----- |  | ---- | - | ----- | 
|                             |  | Price Range |      
|                             |  | Low         |       |  | High |  
|Year Ended December 31, 2010 |  |             |       |  |      |   |       | 
|First Quarter                |  | $           | 18.00 |  |      | $ | 25.75 | 
|Second Quarter               |  |             | 20.11 |  |      |   | 24.65 | 
|Third Quarter                |  |             | 20.49 |  |      |   | 26.16 | 
|Fourth Quarter               |  |             | 23.77 |  |      |   | 28.90 | 
|Year Ended December 31, 2009 |  |             |       |  |      |   |       | 
|First Quarter                |  | $           | 12.51 |  |      | $ | 16.59 | 
|Second Quarter               |  |             | 11.33 |  |      |   | 14.77 | 
|Third Quarter                |  |             | 12.52 |  |      |   | 17.25 | 
|Fourth Quarter               |  |             | 14.20 |  |      |   | 18.28 | 

At February 15,
2011, the closing price of our common stock on the NASDAQ Global Market was $27.47 per share, and we had 50 stockholders of record.



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Performance Graph

The following performance graph and related information shall not be deemed soliciting material or filed with the Securities and Exchange Commission, nor shall such information
be incorporated by reference into any future filing under the Securities Act of 1933 or Securities Exchange Act of 1934, each as amended, except to the extent that we specifically incorporate it by reference into such filing.

The graph below compares total stockholder return on our common stock from June 15, 2006 (the first day our stock was traded on the
NASDAQ Global Market) through December 31, 2010 with the cumulative total return of (a) the NASDAQ Composite Index and (b) the NASDAQ Medical Equipment Index assuming a $100 investment made in each on June 15, 2006. Each of the
three measures of cumulative total return assumes reinvestment of dividends, if any. The stock performance shown on the graph below is based on historical data and is not indicative of, or intended to forecast, possible future performance of our
common stock.

LOGO

Equity Compensation Plan Information

For information concerning prior stockholder approval of and other matters relating to our equity incentive plans, see Item 12 in this annual report on Form 10-K.

Recent Sales of Unregistered Securities

None

Recent Purchase of our Registered Equity Securities

We did not purchase any shares of our common stock during the fourth quarter of 2010.



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Dividends

We have never declared or paid any cash dividends on our capital stock. We currently intend to retain any future earnings to fund the development and expansion of our business, and therefore we do not
anticipate paying cash dividends on our common stock in the foreseeable future. Any future determination to pay dividends will be at the discretion of our board of directors. None of our outstanding capital stock is entitled to any dividends.



|Item 6. | Selected Financial Data
|------- | -----------------------

The selected financial data set forth below are derived from our consolidated financial statements. The consolidated statement of
operations data for the years ended December 31, 2010, 2009 and 2008, and the consolidated balance sheet data at December 31, 2010 and 2009 are derived from our audited consolidated financial statements included elsewhere in this report.
The consolidated statement of operations data for the years ended December 31, 2007 and 2006 and the consolidated balance sheet data at December 31, 2008, 2007 and 2006 are derived from our audited consolidated financial statements which
are not included herein.

The following selected consolidated financial data should be read in conjunction with our
consolidated financial statements and the related notes and Managements Discussion and Analysis of Financial Condition and Results of Operations appearing elsewhere in this report (in thousands, except per share data):



|                                                        |  |                          |         |   |      |   |         |      |  |   |         |   |  |      |         |   |  |   |         |  
|------------------------------------------------------- |  | ------------------------ | ------- | - | ---- | - | ------- | ---- |  | - | ------- | - |  | ---- | ------- | - |  | - | ------- | -
|                                                        |  | Years Ended December 31, |        
|                                                        |  | 2010                     |         |   | 2009 |   |         | 2008 |  |   | 2007    |   |  | 2006 |        
|Consolidated Statement of Operations Data:              |  |                          |         |   |      |   |         |      |  |   |         |   |  |      |         |   |  |   |         |  
|Revenues                                                |  | $                        | 294,146 |   |      | $ | 227,867 |      |  | $ | 171,495 |   |  | $    | 130,614 |   |  | $ | 103,048 |  
|Cost of revenues, excluding amortization of intangibles |  |                          | 108,860 |   |      |   | 91,489  |      |  |   | 64,293  |   |  |      | 51,559  |   |  |   | 41,715  |  
|                                                        |  |                          |         |   |      |   |         |      |  |   |         |   |  |      |         |   |  |   |         |  
|Gross profit                                            |  |                          | 185,286 |   |      |   | 136,378 |      |  |   | 107,202 |   |  |      | 79,055  |   |  |   | 61,333  |  
|Operating expenses:                                     |  |                          |         |   |      |   |         |      |  |   |         |   |  |      |         |   |  |   |         |  
|Selling, general and administrative                     |  |                          | 133,174 |   |      |   | 111,598 |      |  |   | 84,369  |   |  |      | 62,631  |   |  |   | 47,614  |  
|Research and development                                |  |                          | 42,517  |   |      |   | 37,372  |      |  |   | 26,690  |   |  |      | 20,315  |   |  |   | 16,923  |  
|Amortization of intangibles                             |  |                          | 2,559   |   |      |   | 4,224   |      |  |   | 3,125   |   |  |      | 3,067   |   |  |   | 3,117   |  
|In-process research and development (1)                 |  |                          | (2,935  | ) |      |   | 14,030  |      |  |   | 12,681  |   |  |      | 26,188  |   |  |   |        |  
|                                                        |  |                          |         |   |      |   |         |      |  |   |         |   |  |      |         |   |  |   |         |  
|Total operating expenses                                |  |                          | 175,315 |   |      |   | 167,224 |      |  |   | 126,865 |   |  |      | 112,201 |   |  |   | 67,654  |  
|Operating income (loss)                                 |  |                          | 9,971   |   |      |   | (30,846 | )    |  |   | (19,663 | ) |  |      | (33,146 | ) |  |   | (6,321  | )
|Interest income                                         |  |                          | 477     |   |      |   | 756     |      |  |   | 4,828   |   |  |      | 5,841   |   |  |   | 958     |  
|Interest expense                                        |  |                          | (2,192  | ) |      |   | (5      | )    |  |   | (113    | ) |  |      | (199    | ) |  |   | (4,013  | )
|Exchange rate (loss) gain                               |  |                          | (904    | ) |      |   | 2,328   |      |  |   | 1,809   |   |  |      | 1,452   |   |  |   | 1,053   |  
|Other, net                                              |  |                          | (25     | ) |      |   |        |      |  |   | 54      |   |  |      |        |   |  |   | 18      |  
|                                                        |  |                          |         |   |      |   |         |      |  |   |         |   |  |      |         |   |  |   |         |  
|Income (loss) before provision for income taxes         |  |                          | 7,327   |   |      |   | (27,767 | )    |  |   | (13,085 | ) |  |      | (26,052 | ) |  |   | (8,305  | )
|Provision for income taxes                              |  |                          | 2,087   |   |      |   | 1,187   |      |  |   | 620     |   |  |      | 524     |   |  |   | 298     |  
|                                                        |  |                          |         |   |      |   |         |      |  |   |         |   |  |      |         |   |  |   |         |  
|Net income (loss)                                       |  | $                        | 5,240   |   |      | $ | (28,954 | )    |  | $ | (13,705 | ) |  | $    | (26,576 | ) |  | $ | (8,603  | )
|                                                        |  |                          |         |   |      |   |         |      |  |   |         |   |  |      |         |   |  |   |         |  
|Net income (loss) per share:                            |  |                          |         |   |      |   |         |      |  |   |         |   |  |      |         |   |  |   |         |  
|Basic                                                   |  | $                        | 0.10    |   |      | $ | (0.60   | )    |  | $ | (0.29   | ) |  | $    | (0.66   | ) |  | $ | (0.41   | )
|                                                        |  |                          |         |   |      |   |         |      |  |   |         |   |  |      |         |   |  |   |         |  
|Diluted                                                 |  | $                        | 0.10    |   |      | $ | (0.60   | )    |  | $ | (0.29   | ) |  | $    | (0.66   | ) |  | $ | (0.41   | )
|                                                        |  |                          |         |   |      |   |         |      |  |   |         |   |  |      |         |   |  |   |         |  
|Shares used in calculating net income (loss) per share: |  |                          |         |   |      |   |         |      |  |   |         |   |  |      |         |   |  |   |         |  
|Basic                                                   |  |                          | 50,551  |   |      |   | 48,400  |      |  |   | 47,376  |   |  |      | 40,024  |   |  |   | 21,113  |  
|                                                        |  |                          |         |   |      |   |         |      |  |   |         |   |  |      |         |   |  |   |         |  
|Diluted                                                 |  |                          | 53,281  |   |      |   | 48,400  |      |  |   | 47,376  |   |  |      | 40,024  |   |  |   | 21,113  |  
|                                                        |  |                          |         |   |      |   |         |      |  |   |         |   |  |      |         |   |  |   |         |  



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|                                                       |  |                 |         |  |      |   |         |      |  |   |         |  |  |      |         |  |  |   |         | 
|------------------------------------------------------ |  | --------------- | ------- |  | ---- | - | ------- | ---- |  | - | ------- |  |  | ---- | ------- |  |  | - | ------- | 
|                                                       |  | At December 31, |        
|                                                       |  | 2010            |         |  | 2009 |   |         | 2008 |  |   | 2007    |  |  | 2006 |        
|Balance Sheet Data:                                    |  |                 |         |  |      |   |         |      |  |   |         |  |  |      |         |  |  |   |         | 
|Cash and cash equivalents                              |  | $               | 43,429  |  |      | $ | 56,055  |      |  | $ | 100,949 |  |  | $    | 122,913 |  |  | $ | 77,738  | 
|Short-term available-for-sale investments              |  |                 | 175,283 |  |      |   | 66,028  |      |  |   | 48,941  |  |  |      | 66,205  |  |  |   | 17,787  | 
|Working capital                                        |  |                 | 264,937 |  |      |   | 158,668 |      |  |   | 183,147 |  |  |      | 210,094 |  |  |   | 108,908 | 
|Intangible assets, net (2)                             |  |                 | 17,103  |  |      |   | 11,623  |      |  |   | 15,636  |  |  |      | 9,385   |  |  |   | 11,946  | 
|Total assets                                           |  |                 | 431,566 |  |      |   | 276,734 |      |  |   | 275,479 |  |  |      | 266,574 |  |  |   | 154,725 | 
|Short and long-term debt, including current maturities |  |                 | 91,292  |  |      |   | 160     |      |  |   | 242     |  |  |      | 198     |  |  |   | 1,720   | 
|Total stockholders equity (deficit)                   |  |                 | 274,336 |  |      |   | 214,815 |      |  |   | 229,732 |  |  |      | 232,937 |  |  |   | 129,182 | 

These historical results are not
necessarily indicative of results expected for any future period.



|(1) | In 2007, $26.2 million related to the acquisition of CardioSpectra. In 2008, $12.2 million related to the acquisition of Novelis. In 2009, $11.0 million was
recorded for a milestone payment related to the OCT project we acquired from CardioSpectra and $3.0 million represented an accrual for the milestone payment related to the FL.IVUS project acquired from Novelis. In 2010, we recorded a reversal of the
2009 milestone payment accrual for the FL.IVUS project of $3.0 million as we believed we would no longer achieve the milestone.
|--- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(2) | Includes the effects of the Axsun acquisition in December 2008 and the Fluid Medical acquisition in 2010.
|--- | ---------------------------------------------------------------------------------------------------------



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|Item 7. | Managements Discussion and Analysis of Financial Condition and Results of Operations
|------- | -------------------------------------------------------------------------------------

The following discussion and analysis should be read in conjunction with Selected Financial Data and our consolidated
financial statements and notes thereto included elsewhere in this Annual Report.

Overview

We design, develop, manufacture and commercialize a broad suite of intravascular ultrasound, or IVUS, and functional measurement, or FM,
products. We believe that these products enhance the diagnosis and treatment of vascular heart disease by improving the efficiency and efficacy of existing percutaneous interventional, or PCI, therapy procedures in the coronary or peripheral
arteries. We market our products to physicians and technicians who perform PCI procedures in hospitals and to other personnel who make purchasing decisions on behalf of hospitals.

Our products consist of multi-modality consoles which are marketed as stand-alone units or as customized units that can be integrated
into a variety of hospital-based interventional surgical suites called catheterization laboratories, or cath labs. We have developed customized cath lab versions of these consoles and are developing additional functionality options as part of our
cath lab integration initiative. Our consoles have been designed to serve as a multi-modality platform for our phased array and rotational IVUS catheters, fractional flow reserve, or FFR, pressure wires and Medtronics Pioneer reentry device.
We are developing additional offerings for integration into the platform, including, forward-looking IVUS, or FL.IVUS, catheters, image-guided therapy catheters and ultra-high resolution Optical Coherence Tomography, or OCT, systems and catheters.

Our IVUS products include single-procedure disposable phased array and rotational IVUS imaging catheters and additional
functionality options such as virtual histology, or VH, IVUS tissue characterization and ChromaFlo stent apposition analysis. Our FM offerings include FM consoles and single-procedure disposable pressure and flow guide wires used to measure the
pressure and flow characteristics of blood around plaque enabling physicians to gauge the plaques physiological impact on blood flow and pressure.

Through Axsun Technologies, Inc., or Axsun, one of our wholly owned subsidiaries, we also develop and manufacture optical monitors, laser and non-laser light sources, and optical engines used in OCT
imaging systems as well as micro-optical spectrometers and optical channel monitors used by telecommunications and other industrial companies.

We have corporate infrastructure in the U.S., Europe and Japan; direct sales capabilities in the U.S. and South Africa; and a combination of direct sales capabilities and distribution relationships in our
primary international markets, including Japan, Europe, the Middle East, Canada, Asia Pacific and Latin America. Our corporate office is located in San Diego, California. Our worldwide manufacturing and research and development operations are
located in Rancho Cordova, California. We also have additional research and development facilities in Cleveland, Ohio; Forsyth County, Georgia and San Diego, California. We have sales offices in Alpharetta, Georgia and Tokyo, Japan; sales and
distribution offices in Zaventem, Belgium and Woodmead, South Africa; and third-party distribution facilities in Chiba, Japan and Tokyo, Japan. In addition, we have facilities in Billerica, Massachusetts for the manufacturing and operations of
Axsun, our wholly owned subsidiary, and the research and development of OCT and FL.IVUS technology. During the first half of 2010, we completed our restructuring plan to close our facility in San Antonio, Texas and consolidated our OCT resources
into our Billerica, Massachusetts facility. In September 2010, we, through a wholly owned subsidiary, entered into a series of agreements to acquire real property and to design and build manufacturing facilities in Costa Rica.

We have focused on building our domestic and international sales and marketing infrastructure to market our products to physicians and
technicians who perform PCI procedures in hospitals and to other personnel who make purchasing decisions on behalf of hospitals. At December 31, 2010, we had 1,144 employees worldwide, including 490 manufacturing employees, 300 sales and
marketing employees and 150 research and development



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employees. We sell our products directly to customers in certain European markets and utilize distributors in other European markets, including Spain, Portugal and parts of Italy. Beginning in
the third quarter of 2010, we primarily sell our products directly to customers in Japan (see Recent Developments, Direct Sales Strategy in Japan below). We also have a direct contractual relationship with Johnson & Johnson K.K., Cordis
Division, or Johnson & Johnson, through which our IVUS products are distributed in Japan. In certain markets, including the major markets of Asia Pacific, Latin America, Europe, Australia, Africa and the Middle East, we have distributor
relationships through which we sell our products. Our distributors are involved in product launch planning, education and training, physician support and clinical trial management.

At December 31, 2010, we had a worldwide installed base of over 5,900 consoles. We intend to grow and leverage this installed base
to drive recurring sales of our single-procedure disposable catheters and guide wires. In the year ended December 31, 2010, the sale of our single-procedure disposable catheters and guide wires accounted for $213.5 million, or 78.8% of our
medical segment revenues, a $51.6 million, or 31.9% increase from 2009, in which the sale of our single-procedure disposable catheters and guide wires accounted for $161.9 million, or 76.5% of our medical segment revenues.

We manufacture our multi-modality and FM consoles, IVUS catheters and FM guide wires at our facility in Rancho Cordova, California. We
use third-party manufacturing partners to produce circuit boards and mechanical sub-assemblies used in the manufacture of our consoles. We also use third-party manufacturing partners for certain proprietary components used in the manufacture of our
single-procedure disposable products. We perform incoming inspection on these circuit boards, mechanical sub-assemblies and components, assemble them into finished products, and test the final product to assure quality control.

On December 24, 2008, we acquired Axsun Technologies, Inc., a company that develops and manufactures optical monitors for the
telecommunications industry, laser and non-laser light sources and optical engines used in medical OCT imaging systems and advanced photonic components and sub-systems used in spectroscopy and other industrial applications. We believe Axsuns
proprietary OCT technology will provide us competitive advantages in the invasive imaging sector. In connection with the Axsun acquisition, we and Axsun were sued by LightLab Imaging, Inc., or LightLab. LightLab was a wholly owned subsidiary of
Goodman Company, Ltd., which was a distributor of our IVUS and FM products in Japan until that relationship was terminated in July 2009. LightLab was acquired by St. Jude Medical, Inc., or St. Jude, on July 6, 2010. LightLab develops and sells
OCT products for cardiovascular imaging and other medical uses. For details related to the litigation, see Note 4 Commitments and Other Contractual Obligations  Litigation.

Our revenues have increased from $171.5 million in 2008 to $227.9 million in 2009 and to $294.1 million in 2010. Our operating loss
was $19.7 million in 2008, which included a $12.2 million charge related to in-process research and development acquired as part of the acquisition of Novelis. Our operating loss increased to $30.8 million in 2009, which included an $11.0
million charge related to in-process research and development for a milestone of the CardioSpectra acquisition and a $3.0 million charge related to the accrual of a milestone payment related to the Novelis acquisition. In 2010 we had operating
income of $10.0 million, which included a reversal of the $3.0 million charge related to the Novelis milestone, as we believed we would no longer achieve the milestone. (This is discussed in more detail in Recent DevelopmentsNovelis
Milestone Payment.) Our 2010 operating results also included $5.1 million in expenses resulting from the judgment related to our ongoing LightLab litigation (discussed in more detail in Note 4 Commitments and Other Contractual
Obligations  Litigation  LightLab to our consolidated financial statements). At December 31, 2010, our accumulated deficit was $128.0 million. Since our inception, 2010 is the first full fiscal year in which profitability
was achieved.

In the years ended December 31, 2010, 2009 and 2008, 43.0%, 38.9%, and 19.4%, respectively, of our
revenues and 22.1%, 21.0%, and 15.2%, respectively, of our operating expenses were denominated in various non-U.S. dollar currencies, primarily the euro and the yen. We expect that a significant portion of our revenue and operating expenses will
continue to be denominated in non-U.S. dollar currencies. As a result, we are subject to risks related to fluctuations in foreign currency exchange rates, which could affect our operating results in the future.



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Economic conditions have continued to deteriorate significantly in many countries and
regions, including without limitation the U.S., Japan, Europe, Middle East and Africa, where we have generated most of our revenues. These conditions may remain depressed for the foreseeable future. If our customers do not obtain or do not have
access to the necessary capital to operate their businesses, or are otherwise adversely affected by the deterioration in national and worldwide economic conditions, this could result in reductions in the sales of our products, longer sales cycles
and slower adoption of new technologies by our customers, which would materially and adversely affect our business. In addition, our customers and suppliers liquidity, capital resources and credit may be adversely affected by their
relative ability or inability to obtain capital and credit, which could adversely affect our ability to collect on our outstanding invoices and lengthen our collection cycles, or limit our timely access to important sources of raw materials
necessary for the manufacture of our consoles and catheters. There can be no assurances that government responses to the disruptions in the financial or credit markets will improve the national and worldwide economic conditions in the near term.

Recent Developments

Plans to Increase Manufacturing Capacity.In September 2010, we, through a wholly owned subsidiary, entered into a Trust, Land Purchase and Right of First Refusal Agreement, or Purchase
Agreement, with Zona Franca Coyol, Sociedad Anonima, or CFZ, a Costa Rica stock corporation, and Banco Improsa, Sociedad Anonima, a Costa Rica stock corporation, as trustee, pursuant to which we will gain title to a parcel of land, or Property, for
which we paid $3.0 million, for the purpose of constructing a manufacturing facility, and we will have a five-year right of first refusal to purchase a parcel of land contiguous to the Property. The purchase price for such parcel will be for an
amount not to exceed $3.9 million for the land, and the construction costs for our shell building will be an amount not to exceed $12.9 million. In connection with the Purchase Agreement, we, through a wholly owned subsidiary, also entered into a
Fixed Price Building Construction Agreement for Phase One, or Construction Agreement, for the design, planning, construction and administration of construction of our cold shell manufacturing building and exterior work on the Property for $10.5
million, 20% of which was paid upon execution of the Construction Agreement, and the remainder of which will be paid over the eleven-month construction period. Also, in connection with the Purchase Agreement, we, through a wholly owned subsidiary,
entered into a Design, Architecture, Engineering and Construction Management Contract, pursuant to which CFZ will act as the designer, planner and construction manager, as well as constructor and general contractor, for the completion of an
operational manufacturing facility, including the addition of equipment and related improvements. We expect the cost of these improvements to be approximately $21.5 million and we will incur these costs during 2011 and early 2012. CFZ will be paid
on a cost-plus basis whereby CFZ shall perform or cause to be performed the work specified by us and CFZ for the cost of work, plus a construction management fee and reimbursable costs.

Fluid Medical Acquisition.On August 5, 2010, we acquired all of the outstanding equity interests in Fluid Medical,
Inc., or Fluid Medical, a privately-held company, which was engaged in the development of imaging technology for use in various structural heart applications, including, but not limited to, mitral valve repair. Fluid Medicals technology and
intellectual property provide forward field of view imaging on highly maneuverable catheters that have the potential to enable or enhance visualization for procedures currently done with inadequate imaging. This technology is expected to result
in a Forward-Looking Intra-Cardiac Echo, or FL.ICE, catheter that will initially be focused on minimally invasive structural heart applications, such as percutaneous aortic and mitral valve therapies. As we expand our line of visualization
tools used in performing PCIs we believe this technology will enhance our ability to provide a broad suite of visualization products to our customers. The purchase price of $4.2 million consisted of $3.6 million in cash payments and $150,000 of debt
forgiveness related to working capital loans we made to Fluid Medical prior to the acquisition. We have retained $400,000 as a hold-back liability to satisfy any claims for indemnification made within 18 months following the closing.
Assets acquired included $4.1 million of in-process research and development, or IPR&D, which we recorded as an intangible asset, $117,000 of fixed assets, and $46,000 of cash. Liabilities assumed consisted of $22,000 of accrued vacation.
Additionally, we recorded a deferred tax liability of $1.6 million related to the difference



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between the book and tax basis of the acquired assets. The transaction was accounted for as a business combination and, as such we recorded $1.6 million of goodwill reflecting the amount by which
the purchase consideration exceeded the acquired net assets. We recorded $184,000 of acquisition-related costs related to this transaction, which were recognized in our statement of operations for the year ended December 31, 2010 as selling,
general and administrative expense.

Convertible Debt Offering. In September 2010, we issued
$115.0 million aggregate principal amount of 2.875% Convertible Senior Notes due September 1, 2015, or Notes, in an offering registered under the Securities Act of 1933, as amended. Interest is payable semiannually in arrears on
March 1 and September 1, commencing on March 1, 2011. The Notes are general unsecured obligations that rank pari passu with our other existing and future unsecured obligations. Prior to June 1, 2015, the Notes are convertible
only upon certain specified events. The initial conversion rate for the Notes is 33.7339 shares of common stock per $1,000 principal amount of the Notes, representing an initial effective conversion price of approximately $29.64 per share of common
stock. The conversion rate is subject to adjustment for certain events as outlined in the indenture governing the Notes but will not be adjusted for accrued and unpaid interest. We received proceeds of $100.5 million from issuance of the Notes,
net of debt issuance costs ($4.4 million) and net payments related to our hedge transactions ($10.0 million). In connection with this hedge transaction, we purchased call options on our common stock from JPMorgan Chase Bank, National Association, or
JPMorgan Chase. In addition, to reduce the cost of the hedge, under separate transactions we sold warrants to JPMorgan Chase. We recorded total debt issuance costs (including broker fees) of approximately $4.4 million, which have been allocated on a
pro-rata basis to the debt ($3.5 million) and equity ($866,000) components of the transaction. The debt component is primarily included in non-current liabilities and is being accreted to interest expense over five years, the term of the Notes. The
equity component was netted against the proceeds and included in additional paid-in capital.

Direct Sales Strategy in
Japan.Historically, we sold our products in Japan primarily through distributors. During 2009, we began to implement our direct sales strategy by terminating our relationship with our largest distributor in Japan. During the third quarter
of 2010, we continued to expand our direct sales strategy, including our efforts to place and sell our products directly through an internal sales force in Japan. On September 22, 2010, we entered into an agreement with Fukuda Denshi Co., Ltd.,
or Fukuda, to terminate our distribution relationship. The effective date of the termination, or the Termination Date, was November 30, 2010. Under the terms of the agreement, as consideration for the early termination of the distribution
agreement, we agreed to pay Fukuda 119 million Japanese Yen (approximately $1.4 million), or the Termination Payment, of which approximately $710,000 was paid in September 2010, and the remainder was paid on the Termination Date. The
Termination Payment was capitalized as an intangible asset (customer relationships) and will be amortized over the remaining term of the distribution agreement. In addition to the Termination Payment we purchased consoles owned by Fukuda (primarily
placed in service at third party customer sites) for 181 million Japanese Yen (approximately $2.2 million), which represents the estimated fair value of these consoles. This amount is capitalized within Property and Equipment, and is being
depreciated over the remaining estimated useful life of the assets. Additionally, we expect to pay Fukuda approximately 83 million Japanese Yen (approximately $1.0 million), net of outstanding accounts receivable, for the purchase of
disposables held by Fukuda at Termination Date, that we agreed to repurchase. For additional information regarding the risks associated with our direct sales strategy in Japan, see Risk Factors.

Reversal of accrual for Novelis Milestone Payment.Under the terms of our merger agreement with Novelis, a milestone
payment of $3.0 million was eligible to be earned by the Novelis stockholders upon receipt of FDA approval of a 510(k) application for the Novelis FL.IVUS device, but only in the event that the 510(k) application for such a device was filed with the
FDA on or before December 31, 2009. At December 31, 2009 a 510(k) application had been made to the FDA. At that time, we believed that the 510(k) application would be approved and that the milestone would become payable.
Accordingly, at December 31, 2009 we recorded an accrual for $3.0 million in relation to the potential milestone payment.



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Based on our internal assessments in relation to our ongoing interactions with the FDA regarding this 510(k)
application, during the fourth quarter of 2010 it became apparent that our 510(k) application would not be approved prior to its expiration. Accordingly, we reversed the accrual for the milestone payment, resulting in a $3.0 million credit to
IPR&D expense during the quarter.

Financial Operations Overview

The following is a description of the primary components of our revenue and expenses.

Revenues.We derive our revenues from two reporting segments: medical and industrial. Our medical segment represents our
core business, in which we derive revenues primarily from the sale of our consoles and single-procedure disposables. Our industrial segment derives revenues related to the sales of Axsuns micro-optical spectrometers and optical channel
monitors to telecommunication and other industrial companies and sales of lasers to LightLab for use in its OCT system. In the year ended December 31, 2010, we generated $294.1 million of revenues which is composed of $271.1 million from our
medical segment and $23.0 million from our industrial segment. We experienced increases in revenues related to IVUS and FM single-procedure disposables from 2010 compared with 2009, while console sales remained relatively flat year over year. In the
year ended December 31, 2010, 15.0% of our medical segment revenues were derived from the sale of our consoles, as compared with 18.6% in the year ended December 31, 2009. In the year ended December 31, 2010, IVUS single-procedure
disposables accounted for 61.6% of our medical segment revenues, compared to 61.8% in 2009, while in the year ended December 31, 2010, 17.2% of our medical segment revenues were derived from the sale of our FM single-procedure disposables, as
compared with 14.7% in the year ended December 31, 2009. Other revenues consist primarily of service and maintenance revenues, shipping and handling revenues, sales of distributed products, spare parts sales, and license fees.

We expect to continue to experience variability in our quarterly revenues from console sales due in part to the timing of hospital
capital equipment purchasing decisions. Further, we expect variability of our revenues based on the timing of our new product introductions, which may cause our customers to delay their purchasing decisions until the new products are commercially
available. Alternatively, we may include in our arrangements with customers future deliverables, such as unspecified hardware upgrades or training. In these cases, we would be required to defer associated revenues from these customers until we have
met our future deliverables obligation.

Our medical segment sales in the U.S. are generated by our direct sales
representatives and our products are shipped to hospitals throughout the U.S. from our facilities in Rancho Cordova, California and Billerica, Massachusetts. Our medical segment international sales are generated by our direct sales representatives
or through independent distributors and are shipped throughout the world from our facilities in Rancho Cordova, California; Billerica, Massachusetts; Zaventem, Belgium; Chiba, Japan; Tokyo, Japan; and Woodmead, South Africa. Our industrial segment
sales are generated by our direct sales representatives or through independent distributors and these products are shipped to telecommunications and other industrial companies domestically and abroad from our facility in Billerica, Massachusetts.

Cost of Revenues.Cost of revenues consists primarily of material costs for the products that we sell and other
costs associated with our manufacturing process, such as personnel costs, rent, depreciation and utilities. In addition, cost of revenues includes depreciation of company-owned consoles, royalty expenses for licensed technologies included in our
products, service costs, provisions for warranty, distribution, freight and packaging costs and stock-based compensation expense. We expect our gross margin for IVUS and FM products to improve over time if we are successful in our ongoing efforts to
streamline and improve our manufacturing processes and increase production volumes.

Selling, General and
Administrative.Selling, general and administrative expenses consist primarily of salaries and other related costs for personnel serving the sales, marketing, executive, finance, information technology and human resource functions. Other
costs include travel and entertainment expenses, facility costs,



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trade show, training and other promotional expenses, professional fees for legal and accounting services and stock-based compensation expense. We expect that our selling, general and
administrative expenses will increase as we continue to expand our sales force and marketing efforts and invest in the necessary infrastructure to support our continued growth. We expect these expenses to grow at a slower rate than our revenues as
we plan to leverage these costs as we continue to grow our business.

Research and Development.Research and
development expenses consist primarily of salaries and related expenses for personnel, consultants, prototype materials, clinical studies, depreciation, regulatory filing fees, certain legal costs related to our intellectual property and stock-based
compensation expense. We expense research and development costs as incurred. We expect our research and development expenses to increase as we continue to develop our products, technologies and applications.

Amortization of Intangibles. We amortize intangible assets, consisting of our developed technology, licenses, customer
relationships, assembled workforce and patents and trademarks, using the straight-line method over their estimated useful lives up to twenty years. These assets are regularly tested for impairment and abandonment.

In-process Research and Development.In-process research and development, or IPR&D, consists of our projects acquired
in connection with acquisitions that had not reached technological feasibility and had no alternative future uses as of each acquisition date. Certain additional payments that may be required in connection with our acquisitions could result in
future charges to IPR&D.

In December 2007, we acquired certain OCT assets in connection with our acquisition of
CardioSpectra, which was valued at $26.3 million. In-vivo testing and regulatory approval remained to be completed as of the acquisition date at an estimated cost of $7.2 million. In December 2009, we achieved a milestone specified in the
CardioSpectra merger agreement related to the receipt of CE mark regulatory approval and $11.0 million became payable by us to the former stockholders of CardioSpectra. We paid such amount to the former stockholders of CardioSpectra with the
issuance of 609,360 shares of our common stock and $531,000 of cash. Although we have received CE mark approval for a preliminary version of our OCT product, this version is not intended to be commercialized. We believe there is significant
incremental effort and costs that must be incurred to complete a product that is suitable for commercialization and there is significant risk that a commercializable product may not result from our efforts. As of December 31, 2010, we estimate
that we will incur $5.9 million of additional costs in order to obtain a commercializable OCT product for a total of approximately $19.1 million. The OCT project was originally expected to be commercialized by late 2008, however the OCT project was
at an earlier stage of development than our initial assessment indicated. As of December 31, 2010, commercialization is not expected until 2011. Additional milestone payments of up to $17.0 million may be paid to the former stockholders of
CardioSpectra in connection with successful and timely regulatory approvals and sales milestones (see Note 2 Acquisitions to our consolidated financial statements).

If we are unable to launch an OCT product in a timely manner, or at all, such as if we experience delays associated with significant
design changes that result from unsuccessful human trials or discoveries during human trials, we may jeopardize a potential competitive position, experience difficulties in obtaining our forecasted revenues and associated market share and we may not
be required to pay some or all of the remaining milestone payments.

In May 2008, we acquired the FL.IVUS project in
connection with our acquisition of Novelis, which was valued at $12.2 million. In-vivo testing and regulatory approval protocols remained to be completed for the FL.IVUS project as of the acquisition date, at an estimated cost of $3.9 million. In
December 2009, we recorded $3.0 million of additional IPR&D expense related to our FL.IVUS program from Novelis. This represented a contractual milestone payment that was to be made to the former stockholders of Novelis upon achievement of a
regulatory milestone. In December 2010, we determined that we would no longer achieve the milestone and,



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accordingly, we reversed the $3.0 million charge recognized in the prior year. We believe there are significant incremental efforts and costs that must be incurred to complete a product that is
suitable for commercialization. As of December 31, 2010, we estimate that we will incur $7.4 million of additional costs in order to commercialize the first product using FL.IVUS for a total of $15.6 million. We originally expected the FL.IVUS
project to receive regulatory approvals and be commercialized during 2009. As of December 31, 2010, the project was expected to be completed in 2013.

If the FL.IVUS project is not completed in a timely manner, or at all, such as if we experience delays associated with significant design changes that result from unsuccessful human trials or discoveries
during human trials, we may jeopardize our competitive position and experience a potential loss of revenues and associated market share and we may not be required to pay the milestone payment.

In August 2010 we acquired the Forward Looking Intra-Cardiac Echo (FL.ICE) project in connection with our acquistition of Fluid. This
project was recorded as an intangible asset and was valued at $4.1 million. At the date of acquistition the estimated costs to complete were $5.9 million. At December 31, 2010 we estimated costs to complete would be approximately $6.6 million.

In November 2008, we acquired an IPR&D project in connection with our acquisition of substantially all of the assets of
Impact Medical Technologies, LLC, a minor acquisition, valued at approximately $300,000.

The following table summarizes our
significant IPR&D projects (in millions):



|             |  |                        |      |  |                                 |   |     |                                                   |  |   |                                                       |  |  |   |     |  |  |   |      | 
|------------ |  | ---------------------- | ---- |  | ------------------------------- | - | --- | ------------------------------------------------- |  | - | ----------------------------------------------------- |  |  | - | --- |  |  | - | ---- | 
|             |  | As of Acquisition Date |      |  | Costs IncurredSince Acquisition |   |     | Estimated Cost toComplete, as ofDecember 31, 2010 |  |   | Total EstimatedCosts to Completesince AcquisitionDate | 
|Project Name |  | Fair Value             |      |  | Estimated Cost to Complete      |   |     |                                                   | 
|OCT          |  | $                      | 26.3 |  |                                 | $ | 7.2 |                                                   |  | $ | 13.2                                                  |  |  | $ | 5.9 |  |  | $ | 19.1 | 
|FL.IVUS      |  |                        | 12.2 |  |                                 |   | 3.9 |                                                   |  |   | 8.2                                                   |  |  |   | 7.4 |  |  |   | 15.6 | 
|FL.ICE       |  |                        | 4.1  |  |                                 |   | 5.9 |                                                   |  |   | 0.6                                                   |  |  |   | 6.0 |  |  |   | 6.6  | 

Interest
Income. Interest income is comprised of interest income earned from our cash and cash equivalents and our short-term and long-term available-for-sale investments, or Investments.

Interest Expense. Interest expense is comprised of interest expense related to our convertible debt (including coupon
interest, accretion of debt discount, and amortization of issuance costs), as well as interest expense related to our capital lease obligations.

Exchange Rate (Loss) Gain. Exchange rate (loss) gain is comprised of foreign currency transaction and remeasurement gains and losses, net, and the effect of changes in value and net
settlements of our foreign exchange forward contracts.

Provision for Income Taxes. Provision for income taxes
is comprised of foreign income taxes as well as various state and local income taxes.

We have evaluated our ability to fully
utilize our net deferred tax assets on an individual jurisdiction basis. For those jurisdictions in which we believe there is sufficient uncertainty surrounding the realization of deferred tax assets through future taxable income, we have provided a
full valuation allowance and no current benefit has been recognized for net operating losses or other deferred tax assets. Accordingly, deferred tax asset valuation allowances have been established at December 31, 2010 and 2009 to reflect these
uncertainties. Our federal net operating loss carryforwards begin to expire in 2020 and our state net operating loss carryforwards begin to expire in 2012. Foreign net operating losses carry forward indefinitely. We also have federal research and
experimentation tax credits, which begin to expire in 2022, and state research and experimentation tax credits, which carry forward indefinitely.



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Results of Operations

The following table sets forth items derived from our consolidated statements of operations for the years ended December 31, 2010, 2009 and 2008 presented in both absolute dollars (in thousands) and
as a percentage of revenues:



|                                                        |      |                          |         |      |  |  |       |   |  |   |         |   |  |  |       |    |  |   |         |   |  |  |       |   
|------------------------------------------------------- | ---- | ------------------------ | ------- | ---- |  |  | ----- | - |  | - | ------- | - |  |  | ----- | -- |  | - | ------- | - |  |  | ----- | --
|                                                        |      | Years Ended December 31, |        
|                                                        | 2010 |                          |         | 2009 |  |  | 2008  |  
|Revenues                                                |      | $                        | 294,146 |      |  |  | 100.0 | % |  | $ | 227,867 |   |  |  | 100.0 | %  |  | $ | 171,495 |   |  |  | 100.0 | % 
|Cost of revenues, excluding amortization of intangibles |      |                          | 108,860 |      |  |  | 37.0  |   |  |   | 91,489  |   |  |  | 40.2  |    |  |   | 64,293  |   |  |  | 37.5  |   
|                                                        |      |                          |         |      |  |  |       |   |  |   |         |   |  |  |       |    |  |   |         |   |  |  |       |   
|Gross profit                                            |      |                          | 185,286 |      |  |  | 63.0  |   |  |   | 136,378 |   |  |  | 59.8  |    |  |   | 107,202 |   |  |  | 62.5  |   
|Operating expenses:                                     |      |                          |         |      |  |  |       |   |  |   |         |   |  |  |       |    |  |   |         |   |  |  |       |   
|Selling, general and administrative                     |      |                          | 133,174 |      |  |  | 45.3  |   |  |   | 111,598 |   |  |  | 48.9  |    |  |   | 84,369  |   |  |  | 49.2  |   
|Research and development                                |      |                          | 42,517  |      |  |  | 14.5  |   |  |   | 37,372  |   |  |  | 16.4  |    |  |   | 26,690  |   |  |  | 15.6  |   
|Amortization of intangibles                             |      |                          | 2,559   |      |  |  | 0.8   |   |  |   | 4,224   |   |  |  | 1.9   |    |  |   | 3,125   |   |  |  | 1.8   |   
|In-process research and development                     |      |                          | (2,935  | )    |  |  | (1.0  | ) |  |   | 14,030  |   |  |  | 6.1   |    |  |   | 12,681  |   |  |  | 7.4   |   
|                                                        |      |                          |         |      |  |  |       |   |  |   |         |   |  |  |       |    |  |   |         |   |  |  |       |   
|Total operating expenses                                |      |                          | 175,315 |      |  |  | 59.6  |   |  |   | 167,224 |   |  |  | 73.3  |    |  |   | 126,865 |   |  |  | 74.0  |   
|                                                        |      |                          |         |      |  |  |       |   |  |   |         |   |  |  |       |    |  |   |         |   |  |  |       |   
|Operating income (loss)                                 |      |                          | 9,971   |      |  |  | 3.4   |   |  |   | (30,846 | ) |  |  | (13.5 | )  |  |   | (19,663 | ) |  |  | (11.5 | ) 
|Interest income                                         |      |                          | 477     |      |  |  | 0.2   |   |  |   | 756     |   |  |  | 0.3   |    |  |   | 4,828   |   |  |  | 2.8   |   
|Interest expense                                        |      |                          | (2,192  | )    |  |  | (0.8  | ) |  |   | (5      | ) |  |  |      |    |  |   | (113    | ) |  |  | (0.1  | ) 
|Exchange rate (loss) gain                               |      |                          | (904    | )    |  |  | (0.3  | ) |  |   | 2,328   |   |  |  | 1.0   |    |  |   | 1,809   |   |  |  | 1.1   |   
|Other, net                                              |      |                          | (25     | )    |  |  |      |   |  |   |        |   |  |  |      |    |  |   | 54      |   |  |  | 0.1   |   
|                                                        |      |                          |         |      |  |  |       |   |  |   |         |   |  |  |       |    |  |   |         |   |  |  |       |   
|Income (loss) before provision for income taxes         |      |                          | 7,327   |      |  |  | 2.5   |   |  |   | (27,767 | ) |  |  | (12.2 | )  |  |   | (13,085 | ) |  |  | (7.6  | ) 
|Provision for income taxes                              |      |                          | 2,087   |      |  |  | 0.7   |   |  |   | 1,187   |   |  |  | 0.5   |    |  |   | 620     |   |  |  | 0.4   |   
|                                                        |      |                          |         |      |  |  |       |   |  |   |         |   |  |  |       |    |  |   |         |   |  |  |       |   
|Net income (loss)                                       |      | $                        | 5,240   |      |  |  | 1.8   | % |  | $ | (28,954 | ) |  |  | (12.7 | )% |  | $ | (13,705 | ) |  |  | (8.0  | )%
|                                                        |      |                          |         |      |  |  |       |   |  |   |         |   |  |  |       |    |  |   |         |   |  |  |       |   

The following table sets forth our revenues by segment and product expressed as dollar amounts (in
thousands) and the changes in revenues between the specified periods expressed as percentages:



|                              |  |                          |         |  |                   |   |         |      |  |   |              |  |  |              |      |   |  |  |         |   
|----------------------------- |  | ------------------------ | ------- |  | ----------------- | - | ------- | ---- |  | - | ------------ |  |  | ------------ | ---- | - |  |  | ------- | --
|                              |  | Years Ended December 31, |         |  | Percentage Change |  
|                              |  | 2010                     |         |  | 2009              |   |         | 2008 |  |   | 2009 to 2010 |  |  | 2008 to 2009 |     
|Medical segment:              |  |                          |         |  |                   |   |         |      |  |   |              |  |  |              |      |   |  |  |         |   
|Consoles                      |  | $                        | 40,630  |  |                   | $ | 39,438  |      |  | $ | 40,068       |  |  |              | 3.0  | % |  |  | (1.6    | )%
|Single-procedure disposables: |  |                          |         |  |                   |   |         |      |  |   |              |  |  |              |      |   |  |  |         |   
|IVUS                          |  |                          | 167,023 |  |                   |   | 130,785 |      |  |   | 107,037      |  |  |              | 27.7 |   |  |  | 22.2    |   
|FM                            |  |                          | 46,517  |  |                   |   | 31,125  |      |  |   | 17,388       |  |  |              | 49.5 |   |  |  | 79.0    |   
|Other                         |  |                          | 16,943  |  |                   |   | 10,345  |      |  |   | 6,424        |  |  |              | 63.8 |   |  |  | 61.0    |   
|                              |  |                          |         |  |                   |   |         |      |  |   |              |  |  |              |      |   |  |  |         |   
|Sub-total medical segment     |  |                          | 271,113 |  |                   |   | 211,693 |      |  |   | 170,917      |  |  |              | 28.1 |   |  |  | 23.9    |   
|Industrial segment            |  |                          | 23,033  |  |                   |   | 16,174  |      |  |   | 578          |  |  |              | 42.4 |   |  |  | 2,698.3 |   
|                              |  |                          |         |  |                   |   |         |      |  |   |              |  |  |              |      |   |  |  |         |   
|                              |  | $                        | 294,146 |  |                   | $ | 227,867 |      |  | $ | 171,495      |  |  |              | 29.1 | % |  |  | 32.9    | % 
|                              |  |                          |         |  |                   |   |         |      |  |   |              |  |  |              |      |   |  |  |         |   

In 2009 and 2008, $0.6 million and $0.9 million, respectively, were reclassified from
single-procedure disposables (IVUS) to other.



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The following table sets forth our revenues by geographic area expressed as dollar amounts
(in thousands) and the changes in revenues in the specified periods expressed as percentages:



|                                   |  |                          |         |  |                   |   |         |      |  |   |              |  |  |              |      |   |  |  |       |  
|---------------------------------- |  | ------------------------ | ------- |  | ----------------- | - | ------- | ---- |  | - | ------------ |  |  | ------------ | ---- | - |  |  | ----- | -
|                                   |  | Years Ended December 31, |         |  | Percentage Change |  
|                                   |  | 2010                     |         |  | 2009              |   |         | 2008 |  |   | 2009 to 2010 |  |  | 2008 to 2009 |     
|Revenues (1):                      |  |                          |         |  |                   |   |         |      |  |   |              |  |  |              |      |   |  |  |       |  
|United States                      |  | $                        | 134,645 |  |                   | $ | 110,502 |      |  | $ | 87,513       |  |  |              | 21.8 | % |  |  | 26.3  | %
|Japan                              |  |                          | 79,277  |  |                   |   | 52,339  |      |  |   | 43,582       |  |  |              | 51.5 |   |  |  | 20.1  |  
|Europe, the Middle East and Africa |  |                          | 57,614  |  |                   |   | 47,609  |      |  |   | 33,197       |  |  |              | 21.0 |   |  |  | 43.4  |  
|Rest of world                      |  |                          | 22,610  |  |                   |   | 17,417  |      |  |   | 7,203        |  |  |              | 29.8 |   |  |  | 141.8 |  
|                                   |  |                          |         |  |                   |   |         |      |  |   |              |  |  |              |      |   |  |  |       |  
|                                   |  | $                        | 294,146 |  |                   | $ | 227,867 |      |  | $ | 171,495      |  |  |              | 29.1 |   |  |  | 32.9  |  
|                                   |  |                          |         |  |                   |   |         |      |  |   |              |  |  |              |      |   |  |  |       |  



|(1) | Revenues are attributed to geographies based on the location of the customer, except for shipments to original equipment manufacturers, which are attributed to the
country of the origin of the equipment distributed.
|--- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

In 2009 $4.7 million was reclassified from Europe,
the Middle East and Africa to Japan.

Comparison of Years Ended December 31, 2010 and 2009

Revenues.Revenues increased $66.3 million, or 29.1%, to $294.1 million in the year ended December 31, 2010, as
compared to revenues of $227.9 million in the year ended December 31, 2009. In the year ended December 31, 2010, revenues related to IVUS single-procedure disposables increased $36.2 million, or 27.7%, as compared to the year
ended December 31, 2009, while revenues related to FM single-procedure disposables increased $15.4 million or 49.5% in the year ended December 31, 2010 as compared to the year ended December 31, 2009. Revenues related to console sales
in the year ended December 31, 2010 increased 3.0% as compared to the year ended December 31, 2009, based on an increase in console unit sales. Overall, our revenue increases were driven by increased demand for our disposables, as well as
higher revenues resulting from our direct sales efforts in Japan. Additionally, the increases in FM disposable revenues were primarily due to the broader availability of FFR technology as this functionality has been incorporated into our
multi-modality console, in conjunction with an increased adoption of the technology based on clinical study data. Industrial segment revenues were $23.0 million in the year ended December 31, 2010, compared to our industrial segment revenues of
$16.2 million in the year ended December 31, 2009, resulting from higher sales to our international telecommunications customers. Other revenues increased $6.6 million, or 63.8%, due primarily to higher service contract and rental
revenues, partially offset by lower sales of distributed products. Increases in revenues were realized across all our key geographic markets.

Cost of Revenues. Cost of revenues increased $17.4 million, or 19.0%, to $108.9 million, or 37.0% of revenues in the year ended December 31, 2010, from $91.5 million, or
40.2% of revenues in the year ended December 31, 2009. The increase in the cost of revenues was primarily due to higher sales volume. Gross margin was 63.0% of revenues in the year ended December 31, 2010, up from 59.8% of revenues in the
year ended December 31, 2009. This gross margin improvement was primarily the result of favorable pricing from our transition to the direct sales model in Japan, a decrease in the production costs of IVUS and FM disposable products due to
ongoing cost reduction initiatives, increased overhead recovery rates due to higher volumes, and lower warranty related costs. These benefits were partially offset by increased depreciation costs from our console unit placement pool additions.

Selling, General and Administrative. Selling, general and administrative expenses increased $21.6 million, or
19.3%, to $133.2 million, or 45.3% of revenues in the year ended December 31, 2010, as compared to $111.6 million, or 48.9% of revenues in the year ended December 31, 2009. The increase in the year ended December 31, 2010 as
compared with the year ended December 31, 2009 was primarily due to increased headcount resulting from the expansion of our U.S., Europe and Japan sales organizations, including continued



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growth in our Japan operation to support our direct sales efforts there, legal expenses related to our litigation matters, (including the LightLab litigation and associated judgment of $5.1
million which is discussed in more detail in Note 4 Commitments and Other Contractual Obligations  Litigation  LightLab to our consolidated financial statements), increased infrastructure expenses to support company growth,
higher stock-based compensation expense, increased marketing expenses related to new product launches, and severance payments related to the resignation of two senior executives.

Research and Development. Research and development expenses increased $5.1 million, or 13.8%, to $42.5 million,
or 14.5% of revenues in the year ended December 31, 2010, as compared to $37.4 million, or 16.4% of revenues in the year ended December 31, 2009. The increase in research and development expenses in the year ended December 31,
2010 was primarily due to increased spending on various new and existing product development projects, including OCT and FL.IVUS and activities supporting other acquired technologies, and increased clinical and regulatory expenses.

Amortization of Intangibles. Amortization expense decreased to $2.6 million, or 0.8% of revenues in the
year ended December 31, 2010, as compared to $4.2 million, or 1.9% of revenues in the year ended December 31, 2009. The decrease in amortization expense is primarily related to developed technology that we originally acquired from Jomed,
NV that was fully amortized as of December 2009, partially offset by amortization expense related to developed technology acquired in February 2010.

In-process Research and Development.IPR&D expenses were a reduction of expenses of $2.9 million, or 1% of revenues in the year ended December 31, 2010. This primarily resulted from
the reversal of an accrual for a milestone payment of $3.0 million recognized in 2009 related to our FL.IVUS project acquired from Novelis as we believed we would no longer achieve the milestone. IPR&D expenses were $14.0 million, or 6.1% of
revenues in the year ended December 31, 2009. Of this amount, $11.0 million related to a milestone payment for our OCT project acquired from CardioSpectra and $3.0 million related to the accrual of a milestone payment for our FL.IVUS project
acquired from Novelis.

Interest Income. Interest income decreased $279,000, or 36.9%, to $477,000 in the year
ended December 31, 2010, as compared to $756,000 in the year ended December 31, 2009. The decrease was primarily due to a decrease in the weighted-average yield earned on our Investments.

Interest Expense. Interest expense increased to $2.2 million, or 0.8% of revenues in the year ended December 31, 2010,
as compared to $5,000 in the year ended December 31, 2009. The increase was primarily due to our convertible debt financing which was completed in September 2010. Interest expense during the year ended December 31, 2010 related to our
convertible debt (including coupon interest, accretion of debt discount, and amortization of debt issuance costs) and interest expense on our capital lease obligations, while in the year ended December 31, 2009 interest expense was entirely
related to our capital lease obligations.

Exchange Rate (Loss) Gain. Exchange rate loss for the year ended
December 31, 2010 was $904,000 compared to an exchange rate gain of $2.3 million in the year ended December 31, 2009. The gain in the year ended December 31, 2009 primarily related to the weakening of the U.S. dollar compared to
the yen and the related effect on the valuation of euro-based monetary assets and liabilities held by Volcano Europe S.A./N.V., or Volcano Europe. In October 2009, approximately $23.4 million of intercompany receivable amounts owed to Volcano
Corporation from Volcano Japan Co. Ltd., or Volcano Japan, were converted to long-term investment, resulting in a decrease in the amount of yen-based receivables being marked-to-market. In addition, in October 2009, we implemented a hedging program
to mitigate the volatility of our exchange rate gains and losses resulting from the translation of our intercompany receivable balances at current exchange rates. During the year ended December 31, 2010, the impact of fluctuations in exchange
rates was significantly reduced through our hedging practices.

Provision for Income Taxes. Provision for income
taxes for the year ended December 31, 2010 was $2.1 million, compared to a provision for income taxes of $1.2 million for the year ended December 31, 2009. The



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provision and the year-over-year increase were comprised primarily of taxes related to our Japanese operations, while the year-over-year increase also included amounts related to state taxes.
Stock option excess tax benefits of $433,000 were credited to additional paid-in-capital during the year ended December 31, 2010.

Comparison of Years Ended December 31, 2009 and 2008

Revenues.Revenues increased $56.4 million, or 32.9%, to $227.9 million in the year ended December 31, 2009, as compared to revenues of $171.5 million in the year ended
December 31, 2008. In the year ended December 31, 2009, revenues related to IVUS single-procedure disposables increased $23.7 million, or 22.2%, as compared to the year ended December 31, 2008, while revenues related to FM
single-procedure disposables increased $13.7 million or 79.0% in the year ended December 31, 2009 as compared to the year ended December 31, 2008. Revenues related to console sales in the year ended December 31, 2009 were relatively
flat as compared to the same period in the year ended December 31, 2008, as increases in console placements were partially offset by shifts in our customer mix. Overall, our revenue increases were driven by an increase in the number of PCIs
performed, resulting in increased utilization of our single-procedure disposable products. Additionally, the increases in FM disposable revenues were primarily due to the broader availability of FFR technology as this functionality has been
incorporated into our multi-modality console, in conjunction with an increased adoption of the technology based on recent clinical study data. Industrial segment revenues were $16.2 million in the year ended December 31, 2009. We had $578,000
of industrial segment revenues in the year ended December 31, 2008 as we acquired Axsun on December 24, 2008. Other revenues increased $3.9 million, or 61.0%, due primarily to higher service contract and rental revenues and the
inclusion of Axsun medical segment revenues in the 2009 period, partially offset by lower sales of distributed products. Increases in revenues were realized across all our key geographic markets.

Cost of Revenues. Cost of revenues increased $27.2 million, or 42.3%, to $91.5 million, or 40.2% of revenues in
the year ended December 31, 2009, from $64.3 million, or 37.5% of revenues in the year ended December 31, 2008. Gross margin was 59.8% of revenues in the year ended December 31, 2009, down from 62.5% of revenues in the year ended
December 31, 2008. The increase in the cost of revenues was primarily due to higher sales volume. The decrease in gross margin resulted primarily from the addition of lower margin products from Axsun, higher console depreciation and higher
field service costs. These unfavorable gross margin impacts were partially offset by a decrease in the production costs of IVUS and FM disposable products due to ongoing cost reduction initiatives and higher manufacturing capacity utilization.

Selling, General and Administrative. Selling, general and administrative expenses increased $27.2 million, or
32.3%, to $111.6 million, or 48.9% of revenues in the year ended December 31, 2009, as compared to $84.4 million, or 49.2% of revenues in the year ended December 31, 2008. The increase in the year ended December 31, 2009 as
compared with the year ended December 31, 2008 was primarily due to growth in our Japan operation to support our direct sales efforts there, increased headcount resulting from the expansion of our U.S. and Europe sales organizations, legal
expenses related to the LightLab litigation, commission expenses related to the termination of our relationship with Goodman, increased infrastructure expenses to support company growth, inclusion of a full year of expenses from ongoing operations
of Axsun and higher stock-based compensation expense. We acquired Axsun in December 24, 2008, therefore the year ended December 31, 2008 did not include significant expenses related to Axsun. These increases were partially offset by a
decrease of $2.9 million in due diligence expenses that were incurred in the year ended December 31, 2008 related to an acquisition that was not consummated.

Research and Development. Research and development expenses increased $10.7 million, or 40.0%, to $37.4 million, or 16.4% of revenues in the year ended December 31, 2009, as
compared to $26.7 million, or 15.6% of revenues in the year ended December 31, 2008. The increase in research and development expenses in the year ended December 31, 2009 was primarily due to the inclusion of a full year of expenses
from ongoing operations of Novelis and Axsun, increased personnel related costs, increased spending on various productdevelopment projects and increased clinical trial and regulatory expenses. We acquired Axsun in December



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2008, therefore the year ended December 31, 2008 did not include significant expenses related to Axsun. We acquired Novelis in May 2008; therefore the year ended December 31, 2008
included approximately seven months of expenses relating to Novelis.

In-process Research and Development.IPR&D expenses were $14.0 million, or 6.1% of revenues in the year ended December 31, 2009. Of this amount, $11.0 million related to a milestone of our OCT project acquired from CardioSpectra and $3.0 million related to a milestone
of our FL.IVUS project acquired from Novelis. IPR&D expenses were $12.7 million, or 7.4% of revenues in the year ended December 31, 2008. Of this amount, $12.2 million related to the acquisition of Novelis.

Amortization of Intangibles.Amortization expense increased to $4.2 million, or 1.9% of revenues in the year ended
December 31, 2009, as compared to $3.1 million, or 1.8% of revenues in the year ended December 31, 2008. The increase in amortization expense is primarily related to the amortization of intangible assets acquired from Axsun.

Interest Income. Interest income decreased $4.1 million, or 84.3%, to $756,000 in the year ended December 31, 2009, as
compared to $4.8 million in the year ended December 31, 2008. The decrease was primarily due to a decrease in the weighted-average interest rate on our investments and a decrease in our cash and cash equivalents and short-term
available-for-sale investments.

Interest Expense. Interest expense decreased $108,000, or 95.6%, to $5,000 in
the year ended December 31, 2009, as compared to $113,000 in the year ended December 31, 2008. The decrease was entirely due to a reduction in balances of our capital lease obligations. Interest expense during the years ended
December 31, 2009 and 2008 primarily related to our capital lease obligations.

Exchange Rate Gain.
Exchange rate gain for the year ended December 31, 2009 increased $519,000, or 28.7%, to $2.3 million, as compared to $1.8 million for the year ended December 31, 2008. The increase was primarily a result of the fluctuation of the
euro and the yen relative to the U.S. dollar and its related effect on the intercompany receivables between Volcano Corporation and Volcano Europe and Volcano Japan. Exchange rate gain was also favorably impacted by gains related to our foreign
exchange forward contracts as a result of the hedging program we implemented during the fourth quarter of 2009.

Provision for Income Taxes. Provision for income taxes for the year ended December 31, 2009 was $1.2 million, compared
to a provision for income taxes of $620,000 for the year ended December 31, 2008. The provision for income taxes consisted primarily of foreign income taxes and domestic state and local income taxes.

Liquidity and Capital Resources

Sources of Liquidity

Historically, our sources of cash have included:



| |  |  | issuance of equity and debt securities, including underwritten public offerings of our common stock and convertible bonds, cash generated from the
exercise of stock options and participation in our employee stock purchase plan;
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | cash generated from operations, primarily from product sales; and
| | - |  | -----------------------------------------------------------------



| |  |  | interest income.
| | - |  | ----------------

Our historical cash outflows have primarily been associated with:



| |  |  | cash used for operating activities such as the purchase and growth of inventory, expansion of our sales and marketing and research and development
infrastructure and other working capital needs;
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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| |  |  | expenditures related to increasing our manufacturing capacity and improving our manufacturing efficiency;
| | - |  | ---------------------------------------------------------------------------------------------------------



| |  |  | capital expenditures related to the acquisition of equipment that we own and place at our customer premises and other fixed assets;
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------



| |  |  | cash used to repay our debt obligations and related interest expense; and
| | - |  | -------------------------------------------------------------------------



| |  |  | cash used for acquisitions.
| | - |  | ---------------------------

Fluctuations in our working capital due to timing differences of our cash receipts and cash disbursements also impact our cash inflows and outflows.

Prior to our initial public offering, we financed our operations and acquisitions primarily through the issuances of $62.5 million of
preferred stock, $20.0 million of senior subordinated notes and $7.0 million of term loans. These issuances of equity and debt were supplemented with borrowings from a revolving credit facility and equipment financing arrangements. The issuances of
our senior subordinated notes, term loans and revolving credit facility included warrants to purchase our common stock or Series B preferred stock, which automatically converted into warrants to purchase common stock upon the completion of our
initial public offering.

We completed an underwritten initial public offering on June 15, 2006 that resulted in net
proceeds of $54.5 million; an underwritten follow-on offering on December 12, 2006 that resulted in net proceeds of $66.8 million; and an underwritten follow-on offering on October 23, 2007 that resulted in net proceeds of
$122.8 million.

On September 20, 2010, we issued $115.0 million principal amount of 2.875% Convertible Senior
Notes (the Notes) in an offering registered under the Securities Act of 1933, as amended. To hedge against potential dilution upon conversion of the Notes, we purchased call options on our common stock from JPMorgan Chase Bank, National Association,
or JPMorgan Chase. In addition, to reduce the cost of the hedge, under separate transactions we sold warrants to JPMorgan Chase. We received proceeds of $100.5 million from issuance of the Notes, net of issuance costs ($4.4 million) and net payments
related to our hedge transactions ($10.0 million).

At December 31, 2010, our cash and cash equivalents and Investments
totaled $245.5 million. We invest our excess funds in short-term and long-term securities issued by corporations, banks, the U.S. government, municipalities, and financial holding companies and in money market funds comprised of U.S. Treasury
and agency securities. We do not hold securities backed by mortgages.

At December 31, 2010, our accumulated deficit was
$128.0 million. Since inception, we have generated significant operating losses and as a result we have not generated sufficient operating cash flow to fund our operations and the growth in our business. During the year ended December 31,
2010, our business generated $46.2 million in cash flows from operating activities. 2010 is our first full year of profitability.

Cash
Flows



|                                                             |  |                          |          |   |      |   |         |      |  |   |         |  
|------------------------------------------------------------ |  | ------------------------ | -------- | - | ---- | - | ------- | ---- |  | - | ------- | -
|                                                             |  | Years Ended December 31, |         
|                                                             |  | 2010                     |          |   | 2009 |   |         | 2008 | 
|Net cash provided by (used in) operating activities          |  | $                        | 46,183   |   |      | $ | (1,651  | )    |  | $ | 2,387   |  
|Net cash used in investing activities                        |  |                          | (172,894 | ) |      |   | (44,383 | )    |  |   | (27,688 | )
|Net cash provided by financing activities                    |  |                          | 116,935  |   |      |   | 3,735   |      |  |   | 2,872   |  
|Effect of exchange rate changes on cash and cash equivalents |  |                          | (2,850   | ) |      |   | (2,595  | )    |  |   | 465     |  
|                                                             |  |                          |          |   |      |   |         |      |  |   |         |  
|Net decrease in cash and cash equivalents                    |  | $                        | (12,626  | ) |      | $ | (44,894 | )    |  | $ | (21,964 | )
|                                                             |  |                          |          |   |      |   |         |      |  |   |         |  



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Cash Flows from Operating Activities. Cash provided by operating activities of
$46.2 million for 2010 reflected our net income of $5.2 million, adjusted for non-cash expenses, consisting primarily of $18.7 million of depreciation and amortization and $12.5 million of stock-based compensation expense. Decreases in
accrued expenses and other liabilities ($10.7 million), and accrued compensation ($4.0 million) also provided cash. Uses of cash included an increase in accounts receivable of $6.4 million due to increased sales, increased prepaid and other assets
of $1.5 million, and an adjustment for non-cash expenses related to a decrease in IPR&D expenses of $2.9 million primarily due to the reversal of an accrual for a development milestone payment related to the Novelis acquisition ($3.0 million).

Cash used in operating activities of $1.7 million for 2009 reflected our net loss of $29.0 million and non-cash
investment amortization of $626,000. In addition, uses of cash include increases in accounts receivable and inventories of $8.9 million and $8.5 million, respectively, and a decrease of accounts payable of $1.1 million. The increase in
accounts receivable is due to the increased sales volume and timing of cash receipts, the increase in inventory is due to anticipated increased sales volume and the decrease in accounts payable is primarily due to the timing of disbursements. These
amounts were offset by benefits realized from non-cash expenses consisting of in-process research and development expense of $14.0 million related to milestones of the CardioSpectra and Novelis acquisitions, depreciation and amortization of
$16.2 million and non-cash stock compensation expense of $10.9 million. In addition, sources of cash include an increase in accrued compensation of $1.4 million, primarily due to increased headcount and related accrued benefits, and an
increase in accrued expenses and other current liabilities of $1.7 million primarily related to accrued commissions to Goodman and accrued legal costs for the LightLab litigation.

Cash provided by operating activities of $2.4 million for 2008 reflected our net loss of $13.7 million, non-cash investment
accretion of $652,000 and a non-cash gain on foreign exchange of $1.8 million. In addition, uses of cash include increases in accounts receivable of $10.5 million, inventories of $5.0 million and prepaid expenses and other current
assets of $3.2 million. The increase in accounts receivable is due to the increased sales volume and timing of cash receipts, the increase in inventory is due to anticipated increased sales volume and the increase in prepaid expenses and other
current assets is primarily due to payments made for future expenses. These amounts were offset by benefits realized from non-cash expenses consisting of in-process research and development expense of $12.7 million related primarily to the
acquisition of Novelis, depreciation and amortization of $9.4 million and non-cash stock compensation expense of $9.5 million. In addition, sources of cash include accounts payable increases of $2.2 million related to the increase in
inventory and timing of payments, accrued compensation increases of $3.1 million, primarily due to increased headcount and salary deferrals for the employee stock purchase plan, and deferred revenue increases of $301,000.

Cash Flows from Investing Activities.Cash used in investing activities was $172.9 million in 2010, $44.4 million in 2009
and $27.7 million in 2008.

In 2010, $234.0 million was used to purchase short-term and long-term available-for-sale
securities and $25.3 million was used for the purchases of long term assets, including capital expenditures for medical diagnostic equipment and manufacturing equipment. Additionally, we used $4.2 million for the acquisition of Fluid Medical and
$3.9 million for the acquisition of other intangible assets, including purchased technology and costs of patents. These purchases were partially offset by $97.2 million from the sale or maturity of Investments.

In 2009, $146.9 million was used to purchase short-term available-for-sale securities and $26.1 million was used for the purchases of
long term assets, including capital expenditures for medical diagnostic equipment and manufacturing equipment. These purchases were partially offset by $129.1 million from the sale or maturity of short-term available-for-sale investments.

In 2008, $103.0 million was used to purchase short-term available-for-sale securities, $15.5 million was used for the
purchases of long term assets, including capital expenditures for medical diagnostic equipment and



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manufacturing equipment, and $29.7 million was used for acquisitions. These purchases were partially offset by $121.0 million from the sale or maturity of short-term available-for-sale
investments.

Cash Flows from Financing Activities. Cash provided by financing activities was $116.9 million in
2010, $3.7 million in 2009 and $2.9 million in 2008. Cash provided by financing activities in 2010 consisted primarily of net proceeds of $100.5 million from the convertible debt and related hedge transactions, $13.4 million from exercises of
common stock options, and $2.7 million from the sale of common stock under our employee stock purchase plan.

Cash provided by
financing activities in 2009 consisted primarily of proceeds from exercises of common stock options of $2.5 million and proceeds from the sale of common stock under our employee stock purchase plan of $2.1 million.

Cash provided by financing activities in 2008 consisted primarily of $1.2 million of proceeds from exercises of common stock options
and proceeds from the sale of common stock under our employee stock purchase plan of $1.6 million.

Future Liquidity Needs

Our primary short-term needs for capital, which are subject to change, include expenditures related to:



| |  |  | medical diagnostic equipment that we own and place at our customers premises;
| | - |  | ------------------------------------------------------------------------------



| |  |  | our facilities expansion needs, including costs of acquiring or leasing additional facilities and associated building costs or tenant improvements;
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | the acquisition of equipment and other fixed assets for use in our current and future manufacturing and research and development facilities;
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | upgrades to our information technology infrastructure to enhance our capabilities and improve overall productivity;
| | - |  | -------------------------------------------------------------------------------------------------------------------



| |  |  | support of our commercialization efforts related to our current and future products, including expansion of our direct sales force and field support
resources in the U.S. and abroad, particularly in Japan where our strategy is to continue to pursue a direct sales model;
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | the continued advancement of research and development activities;
| | - |  | -----------------------------------------------------------------



| |  |  | improvements to and increases in our manufacturing capacity and efficiency; and
| | - |  | -------------------------------------------------------------------------------



| |  |  | acquisitions of technologies that enhance our capabilities or compliment our markets.
| | - |  | -------------------------------------------------------------------------------------

Our capital expenditures are largely discretionary and within our control. We expect that our product revenue and the resulting operating
income, as well as the status of each of our product development programs, will significantly impact our cash management decisions.

At December 31, 2010, we believe our current cash and cash equivalents and our Investments will be sufficient to fund working capital requirements, capital expenditures (including the expansion of
our manufacturing operations into Costa Rica and the implementation of a new Enterprise Resource Management system), and operations for at least the next 12 months. We intend to retain any future earnings to support operations and to finance
the growth and development of our business, and we do not anticipate paying any dividends in the foreseeable future.

Our
future liquidity and capital requirements will be influenced by numerous factors, including the extent and duration of any future operating losses, the level and timing of future sales and expenditures, the results and scope of ongoing research and
product development programs, working capital required to support our sales



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growth, funds required to service our debt, the receipt of and time required to obtain regulatory clearances and approvals, our sales and marketing programs, our need for infrastructure to
support our sales growth, the continuing acceptance of our products in the marketplace, competing technologies and changes in the market and regulatory environment and cash that may be required to settle our foreign currency hedges.

Our ability to fund our longer-term cash needs is subject to various risks, many of which are beyond our controlSee Risk
FactorsWe may require significant additional capital to pursue our growth strategy, and our failure to raise capital when needed could prevent us from executing our growth strategy. Should we require additional funding, such as
additional capital investments, we may need to raise the required additional funds through bank borrowings or public or private sales of debt or equity securities. We cannot assure that such funding will be available in needed quantities or on terms
favorable to us, if at all.

At December 31, 2010, we have federal and state net operating loss carryforwards of
approximately $67.3 million and $34.8 million, respectively, available to reduce future taxable income if we remain profitable. Pursuant to Internal Revenue Code Section 382, use of net operating loss carryforwards related to acquisitions
of approximately $31.6 million may be limited. We expect to utilize our available net operating loss carryforwards to reduce future tax obligations in the event we are successful in maintaining continued profitability. However, future limitations on
our ability to use net operating loss carryforwards and other minimum state taxes may increase our overall tax obligations.

Off-Balance
Sheet Arrangements and Other Contractual Obligations

In conjunction with the sale of our products in the ordinary course
of business, we provide standard indemnification to business partners and customers for losses suffered or incurred for patent, copyright or any other intellectual property infringement claims by any third parties with respect to our products. The
term of these indemnification arrangements is generally perpetual. The maximum potential amount of future payments we could be required to make under these agreements is unlimited. At December 31, 2010, we have not incurred any costs to defend
lawsuits or settle claims related to these indemnification arrangements.

In October 2007, we signed a clinical research
support agreement with a third party in which the third party will conduct clinical studies concerning drug eluting stents. We have agreed to provide a total of $4.6 million to fund clinical study activities. At December 31, 2010, we have a
remaining obligation of up to $3.1 million and we will be billed as services are performed under the agreement.

In addition,
we have entered into agreements with other third parties to sponsor clinical studies. Generally, we contract with one or more clinical research sites for a single study and no one agreement is material to our consolidated results of operations or
financial condition. We are usually billed as services are performed based on enrollment and are required to make payments over periods ranging from less than one year up to three years. Our actual payments under these agreements will vary based on
enrollment. At December 31, 2010, we estimate our contractual obligations related to these clinical studies are approximately $4.7 million over the next three years.

The following table summarizes our significant contractual obligations and commercial commitments that are not reflected in our balance sheet at December 31, 2010 for each of the periods indicated
(in thousands):



|                                                    |       |                       |        |                |  |   |          |  |  |          |        |  |                 |   |        |  |  |   |   | 
|--------------------------------------------------- | ----- | --------------------- | ------ | -------------- |  | - | -------- |  |  | -------- | ------ |  | --------------- | - | ------ |  |  | - | - | 
|                                                    |       | Payment Due By Period |       
|                                                    | Total |                       |        | LessThan1 Year |  |   | 1-2Years |  |  | 3-5Years |        |  | Morethan5 Years |  
|Contractual Obligations and Commercial Commitments  |       |                       |        |                |  |   |          |  |  |          |        |  |                 |   |        |  |  |   |   | 
|Capital lease obligations (including interest)      |       | $                     | 154    |                |  | $ | 74       |  |  | $        | 80     |  |                 | $ |       |  |  | $ |  | 
|Operating lease obligations (1)                     |       |                       | 19,406 |                |  |   | 5,842    |  |  |          | 8,915  |  |                 |   | 4,649  |  |  |   |  | 
|Non-cancelable purchase commitments (2)             |       |                       | 24,929 |                |  |   | 17,698   |  |  |          | 1,808  |  |                 |   | 5,423  |  |  |   |  | 
|Commitments for construction of Costa Rica facility |       |                       | 29,862 |                |  |   | 24,062   |  |  |          | 5,800  |  |                 |   |       |  |  |   |  | 
|                                                    |       |                       |        |                |  |   |          |  |  |          |        |  |                 |   |        |  |  |   |   | 
|Total (3)                                           |       | $                     | 74,351 |                |  | $ | 47,676   |  |  | $        | 16,603 |  |                 | $ | 10,072 |  |  | $ |  | 
|                                                    |       |                       |        |                |  |   |          |  |  |          |        |  |                 |   |        |  |  |   |   | 



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|(1) | We lease office space and have entered into other lease commitments in the U.S. as well as locations in Europe and Asia. Operating lease obligations include future
minimum lease payments under all our non-cancelable operating leases at December 31, 2010.
|--- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(2) | Consists of non-cancelable commitments primarily for the purchase of production materials.
|--- | ------------------------------------------------------------------------------------------

|(3) | The table above does not include milestone payments of up to an aggregate of $17.0 million which may be due to the former shareholders of CardioSpectra (see Note 2
Acquisitions to our consolidated financial statements) upon the achievement of certain milestones (and may, at our election, be payable in either cash or stock), and up to an estimated $4.7 million in payments for clinical studies which
are billed as services are performed (see above).
|--- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Critical Accounting Policies

Our financial statements have been prepared in accordance with U.S. generally accepted accounting principles, or GAAP. The preparation of
these financial statements requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses.

Critical accounting policies are those that are both important to the portrayal of our financial condition and results of operations and require managements most difficult, subjective or complex
judgments, often as a result of the need to make estimates about the effect of matters that are inherently uncertain. As the number of variables and assumptions affecting the possible future resolution of the uncertainties increase, those judgments
become even more subjective and complex. In order to provide an understanding about how our management forms its judgments about future events, including the variables and assumptions underlying the estimates, and the sensitivity of those judgments
to different circumstances, we have identified our critical accounting policies below.

Revenue Recognition

In accordance with Staff Accounting Bulletin, or SAB, No. 104, Revenue Recognition, we recognize revenues when persuasive
evidence of an arrangement exists, delivery has occurred or services have been rendered, the price is fixed or determinable and collectability is reasonably assured. Revenue from the sale of our products is generally recognized when title and risk
of loss transfers to the customer, the terms of which are generally free on board shipping point. We use contracts and customer purchase orders to determine the existence of an arrangement. We use shipping documents and third-party proof of delivery
to verify that title has transferred. We assess whether the fee is fixed or determinable based upon the terms of the agreement associated with the transaction. To determine whether collection is probable, we assess a number of factors, including
past transaction history with the customer and the creditworthiness of the customer.

We prospectively adopted Financial
Accounting Standards Board, or FASB, Accounting Standards Update, or ASU, No. 2009-13, Revenue Recognition (Topic 605): Multiple-Deliverable Revenue Arrangements,or ASU 2009-13, and ASU No. 2009-14, Software (Topic 985):Certain
Revenue Arrangements That Include Software Elements,or ASU 2009-14, on January 1, 2010. We have applied ASU 2009-13 to our revenue arrangements containing multiple deliverables that were entered into or significantly modified on or after
January 1, 2010. These deliverables can consist of consoles, options for the console, single-procedure disposable products, service and maintenance agreements, biomedical equipment education and exchange rights for alternative platforms of our
product functionality. As a result of adopting ASU 2009-13, we have identified additional separate units of accounting related to options for our consoles, biomedical equipment education and exchange rights for alternative platforms of our product
functionality. We allocate arrangement consideration based on the relative selling prices of the separate units of accounting contained within an arrangement containing multiple deliverables. Selling prices are determined using fair value, when
available, or our estimate of selling price when fair value is not available for a given unit of accounting. Significant inputs in our estimates of the selling price of separate units of accounting include market and pricing trends, a
customers geographic location and the



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expected gross margins by product line. Prior to the adoption of ASU 2009-13, we used the residual method to allocate the arrangement consideration when we had not established fair value of
delivered items and deferred all arrangement consideration when fair value was not available for undelivered items. Typically, we recognize revenue for each unit of accounting upon delivery of the item and complete all obligations under an
arrangement with multiple deliverables within one year.

We occasionally enter into agreements requiring cash payments to
partners who are also customers. We apply the provisions of ASC Topic 605-50, Customer Payments and Incentives, to account for cash payments made under these agreements. This typically results in a reduction of revenue for such payments.

Fair Value

We record our Investments at fair value. At December 31, 2010, our cash and Investments totaled $245.5 million. FASB ASC Topic 820, Fair Value Measurements and Disclosures, or ASC 820,
establishes three levels of inputs that may be used to measure fair value (see Note 3 Financial Statement Details to our consolidated financial statements included in this Annual Report). Each level of input represents varying degrees of
subjectivity and difficulty involved in determining fair value. Valuations using Level 1 and 2 inputs are generally based on price quotations and other observable inputs in active markets and do not require significant management judgment or
estimation. We utilize a third-party pricing service to assist us in obtaining fair value pricing for these investments. While pricing for these securities is based on proprietary models, the inputs used are based on observable market information,
therefore we have classified our inputs as Level 1 and Level 2. We do not value any of our Investments using Level 3 inputs.

We also record our foreign exchange forward contracts at fair value. At December 31, 2010, the fair value of our foreign exchange
forward contracts of $299,000 was included in accrued expenses and other current liabilities in our consolidated balance sheet. We classified these fair value inputs as Level 2.

Inventory Valuation

We state our inventories at the lower of cost
or market value, determined on a first-in, first-out basis. We provide inventory allowances when conditions indicate that the selling price could be less than cost due to obsolescence, potential expiration of raw materials and reductions in
estimated future demand. We balance the need to maintain strategic inventory levels with the risk of obsolescence due to changing technology and customer demand levels. Unfavorable changes in market conditions may result in a need for additional
inventory reserves that could adversely impact our gross margins. Conversely, favorable changes in demand could result in higher gross margins when we sell products.

Valuation of Long-lived Assets

Our long-lived assets consist of
property and equipment and intangible assets. Equipment is carried at cost and is depreciated over the estimated useful lives of the assets, which are generally three to five years, and leasehold improvements are amortized over the lesser of the
lease term or the estimated useful lives of the improvements, which is generally between three and ten years. The straight-line method is used for depreciation and amortization. Intangible assets primarily consist of developed technology, customer
relationships, licenses, and patents and trademarks, which are amortized using the straight-line method over periods ranging from three to ten years, representing the estimated useful lives of the assets. We capitalize external legal costs and
filing fees associated with obtaining patents on our new discoveries and amortize these costs using the straight-line method over the legal life of the patent or the products estimated useful life, up to twenty years. Acquired intellectual
property is recorded at cost and is amortized over its estimated useful life. We believe the useful lives we assigned to these assets are reasonable.



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Goodwill and Intangible Assets

We account for goodwill and other intangible assets in accordance with FASB ASC Topic 350, IntangiblesGoodwill and Other, or
ASC 350. The purchase method of accounting for acquisitions requires extensive use of accounting estimates and judgments to allocate the purchase price to the fair value of the net tangible and intangible assets acquired. We use the discounted cash
flow method to estimate the value of intangible assets acquired. The estimates used to value and amortize intangible assets are consistent with the plans and estimates that we use to manage our business and are based on available historical
information and industry estimates and averages.

Intangible assets, consisting of developed technology, licenses, customer
relationships, assembled workforce, patents and trademarks, are amortized using the straight-line method over their estimated useful lives up to twenty years. Purchased IPR&D is also capitalized. Amortization begins upon completion of a
commercializable product and continues over the life of the product. These assets are regularly tested for impairment and abandonment.

ASC 350 requires that goodwill and certain intangible assets be assessed for impairment on an annual basis, or more frequently if indicators of impairment exist, using fair value measurement techniques.
We conduct our assessment on October 1 of each year. The goodwill impairment test compares the implied fair value of the reporting units goodwill with the carrying amount of that goodwill to measure the amount of the impairment loss, if
any. The implied fair value of goodwill is determined in the same manner as in a business combination. Determining the fair value of the implied goodwill is judgmental in nature and often involves the use of significant estimates and assumptions.
These estimates and assumptions could have a significant impact on whether or not an impairment charge is recognized and also the magnitude of any such charge. Acquisitions which cause us to recognize goodwill and other intangible assets require us
to make determinations that involve estimates and judgments about the value and recoverability of those assets.

We consider
no less frequently than quarterly whether indicators of impairment of long-lived assets are present. These indicators may include, but are not limited to, significant decreases in the market value of an asset and significant changes in the extent or
manner in which an asset is used. If these or other indicators are present, we determine whether the estimated future undiscounted cash flows attributable to the assets in question are less than their carrying value. If less than their carrying
value, we recognize an impairment loss based on the excess of the carrying amount of the assets over their respective fair values. Fair value is determined by discounted future cash flows, appraisals or other methods. The evaluation of asset
impairments related to long-lived assets require us to make assumptions about future cash flows over the life of the asset being evaluated which requires significant judgment. Actual results may differ from assumed or estimated amounts.

Foreign Currency Translation

On July 1, 2009, we adopted the Japanese yen as the functional currency for Volcano Japan. Consistent with the considerations specified in FASB ASC Topic 830, Foreign Currency Matters, or ASC
830, the change was made to reflect recent developments with our Japan operations, including increases in direct sales denominated in the Japanese yen and growth in the local infrastructure that has enabled the day-to-day operations of Volcano Japan
to become relatively self-contained and integrated into the Japanese economic environment. In accordance with ASC 830, assets and liabilities of Volcano Japans operations are translated into U.S. dollars at period-end exchange rates, revenues
and expenses are translated into U.S. dollars at average exchange rates in effect during each reporting period and adjustments resulting from the translation are reported on our consolidated balance sheet in accumulated other comprehensive loss. Due
to the complexities and variability of foreign exchange rates between the U.S. dollar and Japanese yen, we are not able to estimate the financial effect this change will have on our future results of operations.



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Stock-based Compensation

We account for stock-based compensation under the provisions of FASB ASC Topic 718, CompensationStock Compensation,or ASC
718, which requires the measurement and recognition of compensation expense for all stock-based awards made to employees and directors based on estimated fair values on the grant date. We estimate the fair value of stock-based awards on the date of
grant using the Black-Scholes-Merton option pricing model, or Black-Scholes model. The value of the portion of the award that is ultimately expected to vest is recognized as expense over the requisite service periods using the straight-line method.
We estimate forfeitures at the time of grant and revise our estimate in subsequent periods if actual forfeitures differ from those estimates. See Note 5 Stockholders Equity to our consolidated financial statements for a complete
discussion of our equity compensation programs and the fair value assumptions used to determine our stock-based compensation expense.

We have used the Black-Scholes model to estimate fair value of our stock-based awards which requires various judgmental assumptions including estimating stock price volatility, risk-free interest rate,
and expected option life. If we had made different assumptions, the amount of our deferred stock-based compensation, stock-based compensation expense, gross margin, net income (loss) and net income (loss) per share amounts could have been
significantly different. We believe that we have used reasonable methodologies, approaches and assumptions to determine the fair value of our common stock and that deferred stock-based compensation and related amortization were recorded properly for
accounting purposes. If any of the assumptions used change significantly, stock-based compensation expense may differ materially in the future from that recorded in the current period. For example, we granted stock options for 965,142 shares of our
common stock during the year ended December 31, 2010. Using our assumptions, we calculated approximately $7.9 million of stock compensation expense related to these awards that will be amortized over four years. Given a ten percent change in
our volatility assumption, the value of these awards would have differed by approximately $1.3 million. Given a one-hundred basis point change in our risk-free interest rate assumption, the value of these awards would have differed by approximately
$0.3 million. Given a one year change in our expected option life assumption, the value of these awards would have differed by approximately $0.8 million. In addition, given a one-hundred basis point change in our weighted-average forfeiture rate
assumption, our stock-compensation expense recorded in the year ended December 31, 2010 would have differed by approximately $80,000.

Income Taxes

We
account for income taxes in accordance with FASB ASC Topic 740, Income Taxes. Our deferred tax assets are determined by multiplying the differences between the financial reporting and tax reporting bases for assets and liabilities by the
enacted tax rates expected to be in effect when such differences are expected to be recovered or settled.

The realization of
our deferred tax assets, which had a gross carrying value of $36.1 million at December 31, 2010, is dependent upon our ability to generate sufficient future taxable income. We have evaluated our deferred tax assets on an individual
jurisdiction basis. Within the U.S. and selected international jurisdictions, we have established a full valuation allowance against our deferred tax assets to reflect the uncertainty of realizing the deferred tax benefits. A valuation allowance is
required when it is more likely than not that all or a portion of a deferred tax asset will not be realized. A review of all available positive and negative evidence needs to be considered, including our past and future performance, the market
environment in which we operate, the utilization of tax attributes in the past, and the length of carryforward periods and evaluation of potential tax planning strategies. We expect to continue to maintain a full valuation allowance in the U.S. and
selected international jurisdictions until an appropriate level of profitability is sustained or we are able to develop tax strategies that would enable us to conclude that it is more likely than not that a portion of our deferred tax assets would
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Recent Accounting Pronouncements

In February 2010, the FASB issued ASU No. 2010-09, Subsequent Events (Topic 855) which updates the guidance in ASC Topic 855,
Subsequent Events, to no longer require companies that file with the SEC to indicate the date through which they have analyzed subsequent events. This updated guidance became effective immediately upon issuance.

In December 2010, the FASB issued ASUpdate No. 2010-28, IntangiblesGoodwill and Other (Topic 350):When to Perform Step
2 of the Goodwill Impairment Test for Reporting Units with Zero or Negative Carrying Amounts (ASU 2010-28). ASU 2010-28 modifies Step 1 of the goodwill impairment test so that for those reporting units with zero or negative carrying amounts, an
entity is required to perform Step 2 of the goodwill impairment test if it is more likely than not based on an assessment of qualitative indicators that goodwill impairment exists. In determining whether it is more likely than not that goodwill
impairment exists, an entity should consider whether there are any adverse qualitative factors indicating that impairment may exist. ASU 2010-28 is effective for fiscal years, and interim periods within those years, beginning after December 15,
2010. Early adoption is not permitted. We do not expect adoption of this standard to have a material impact on our consolidated results of operations and financial condition.

Inflation

We do not believe that inflation has had a material impact on
our historical results of operations; however, there can be no assurance that our business will not be materially affected by inflation in the future.



|Item 7A. | Quantitative and Qualitative Disclosures About Market Risk
|-------- | ----------------------------------------------------------

Market risk represents the risk of changes in the value of market risk sensitive instruments caused by fluctuations in interest rates, foreign exchange rates and commodity prices. Changes in these factors
could cause fluctuations in our results of operations and cash flows. In the ordinary course of business, we are exposed to interest rate and foreign exchange risk. Fluctuations in interest rates and the rate of exchange between the U.S. dollar and
foreign currencies, primarily the euro and yen, could adversely affect our financial results.

Interest Rate Risk

Our exposure to interest rate risk at December 31, 2010 is related to the investment of our excess cash into highly liquid financial
investments as well as our convertible debt which has a fixed rate. Fixed rate investments and borrowings may have their fair market value adversely impacted from changes in interest rates.

At December 31, 2010, we held $245.5 million in cash and cash equivalents and available-for-sale investments of which $218.7
million consisted of highly liquid financial investments with original final maturities of one year or less and the remaining amount was long-term available-for-sale investments with original final maturities over one year. Based upon our balance of
cash and cash equivalents and Investments, the impact of an increase or decrease in interest rates of ten basis points would cause a corresponding increase or decrease in our annual interest income of approximately $250,000 from these investments.

We invest in cash and cash equivalents and Investments in accordance with our investment policy. The primary objectives of
our investment policy are to preserve principal, maintain proper liquidity to meet operating needs and maximize yields consistent with our tolerance for investment risk. Our investment policy specifies credit quality standards for our investments.
We do not hold mortgage-backed securities. Due to the generally short-term nature of the majority of our investments, we have assessed that there is no material exposure to interest rate risk arising from them.



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Foreign Currency Exchange Risk

We are exposed to foreign currency risk related to our European and Japanese operations. Fluctuations in the rate of exchange between the
U.S. dollar and foreign currencies, primarily the euro and the yen, could adversely affect our financial results. During the year ended December 31, 2010, 16.1% and 26.9% of our revenues were denominated in the euro and yen, respectively, 9.6%
of our operating expenses were denominated in the euro and 12.5% of our operating expenses were denominated in the yen. During the year ended December 31, 2010, revenues were unfavorably impacted by the valuation of the euro and favorably
impacted by the valuation of the yen, as compared to the U.S. dollar. In periods of a strengthening U.S. dollar, our results of operations including the amount of revenue that we report in future periods could be negatively impacted.

Exchange rate fluctuations resulting from the translation of the inter-company balances between Volcano Corporation, our U.S. entity, and
Volcano Japan; and Volcano Corporation and Volcano Europe, and other non-U.S. dollar denominated liabilities into U.S. dollars are recorded as foreign currency transaction gains or losses and are included in exchange rate gain in the consolidated
statement of operations. On October 1, 2009, approximately $23.4 million of intercompany receivable owed to Volcano Corporation from Volcano Japan was converted into a long-term investment, resulting in a decrease in the amount of yen-based
receivables being marked-to-market. In April 2008, $22.6 million of intercompany receivable owed to Volcano Corporation from Volcano Europe was converted into equity, resulting in a decrease in the amount of euro-based receivables being
marked-to-market. These conversions thereby reduce the impact of the exchange rate fluctuations in our consolidated statements of operations.

Through September 30, 2009, we did not engage in hedging activities with respect to our foreign currency exchange risk. Commencing October 2009, we began using foreign exchange forward contracts to
manage a portion of the foreign currency risk for foreign subsidiaries with monetary assets and liabilities denominated in the yen and the euro. We only use derivative financial instruments to reduce the risk that our earnings and cash flows will be
adversely affected by changes in exchange rates; we do not hold any derivative financial instruments for trading or speculative purposes. We primarily use foreign exchange forward contracts to hedge foreign currency exposures, and they generally
have terms of one year or less. Realized and unrealized gains or losses on the value of financial contracts used to hedge the exchange rate exposure of these monetary assets and liabilities are also included in the determination of net income, as
these transactions have not been designated for hedge accounting treatment. These contracts effectively fix the exchange rate at which these specific monetary assets and liabilities will be settled so that gains or losses on the forward contracts
offset the losses or gains from changes in the value of the underlying monetary assets and liabilities. These contracts contain net settlement features. If we experience unfavorable changes in foreign exchange rates, we may be required to use
material amounts of cash to settle the transactions which may adversely affect the operating results that we report with respect to the corresponding period. During the year ended December 31, 2010 and 2009, we recorded exchange rate losses of
$3.2 million and exchange rate gains of $715,000, respectively, related to our foreign exchange forward contracts. We had no gains or losses related to foreign exchange forward contracts in 2008.

We currently hold foreign exchange forward contracts with a single counterparty. The bank counterparty in these contracts exposes us to
credit-related losses in the event of their nonperformance. However, to mitigate that risk, we only contract with counterparties who meet our minimum credit quality guidelines. In addition, our exposure in the event of a default by our counterparty
is limited to the changes in value of our hedged balances. At December 31, 2010, we were in a net liability position with our counterparty for $299,000.

Market Price Sensitive Instruments

In order to reduce the potential equity
dilution, we entered into convertible note hedge transactions (the Hedge) entitling us to purchase up to 3.9 million shares of our common stock at an initial stock price of $29.64 per share, each of which is subject to adjustment. Upon
conversion of our Convertible Senior Notes, the Hedge is expected to reduce the equity dilution if the daily volume-weighted average price per share of our common stock



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exceeds the strike price of the Hedge. We also entered into warrant transactions with the counterparties of the Hedge entitling them to acquire up to 3.9 million shares of our common stock,
subject to adjustment, at an initial strike price of $34.88 per share, subject to adjustment. The warrant transactions could have a dilutive effect on our earnings per share to the extent that the price of our common stock during a given measurement
period (the quarter or year to date period) at maturity of the warrants exceeds the strike price of the warrants. See Note 3 Financial Statement DetailsConvertible Debt for additional information.



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|Item 8. | Financial Statements and Supplementary Data
|------- | -------------------------------------------

VOLCANO CORPORATION

INDEX TO CONSOLIDATED FINANCIAL
STATEMENTS



|                                                                                                                                      |  |      |    | 
|------------------------------------------------------------------------------------------------------------------------------------- |  | ---- | -- | 
|                                                                                                                                      |  | Page |   
|Reports of Independent Registered Public Accounting Firms                                                                             |  |      | 70 | 
|Consolidated Balance Sheets at December 31, 2010 and 2009                                                                             |  |      | 73 | 
|Consolidated Statements of Operations for the Years Ended December 31, 2010, 2009 and
2008                                            |  |      | 74 | 
|Consolidated Statements of Stockholders Equity and Comprehensive Income (Loss) for the Years Ended December 31,
 2010, 2009 and 2008 |  |      | 75 | 
|Consolidated Statements of Cash Flows for the Years Ended December 31, 2010, 2009 and
2008                                            |  |      | 76 | 
|Notes to Consolidated Financial Statements                                                                                            |  |      | 77 | 



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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

The Board of Directors and Stockholders

Volcano Corporation:

We have audited the accompanying consolidated balance sheet of Volcano
Corporation and subsidiaries (the Company) as of December 31, 2010, and the related consolidated statements of operations, stockholders equity and comprehensive income (loss), and cash flows for the year then ended. These
consolidated financial statements are the responsibility of the Companys management. Our responsibility is to express an opinion on these consolidated financial statements based on our audit.

We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require
that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the
financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audit provides a reasonable
basis for our opinion.

In our opinion, the consolidated financial statements referred to above present fairly, in all material respects, the
financial position of Volcano Corporation and subsidiaries as of December 31, 2010, and the results of their operations and their cash flows for the year then ended, in conformity with U.S. generally accepted accounting principles.

As discussed in Note 1 to the consolidated financial statements, the Company changed its method of accounting for revenue arrangements
containing multiple elements due to the adoption of a new accounting pronouncement in 2010.

We have also audited, in accordance with the
standards of the Public Company Accounting Oversight Board (United States), Volcano Corporations internal control over financial reporting as of December 31, 2010, based on criteria established in Internal Control 
Integrated Framework issued by the Committee of Sponsoring Organization of the Treadway Commission (COSO), and our report dated February 28, 2011, expressed an unqualified opinion on the effectiveness of the Companys internal control
over financial reporting.

/s/ KPMG LLP

San Diego, California

February 28, 2011



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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

The Board of Directors and Stockholders of Volcano Corporation

We have audited the accompanying consolidated balance sheet of Volcano Corporation as of December 31, 2009, and the related consolidated statements of operations, stockholders equity and
comprehensive income (loss), and cash flows for the years ended December 31, 2009 and 2008. These financial statements are the responsibility of the Companys management. Our responsibility is to express an opinion on these financial
statements based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting
Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis,
evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement
presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the financial statements
referred to above present fairly, in all material respects, the consolidated financial position of Volcano Corporation at December 31, 2009, and the consolidated results of its operations and its cash flows for the years ended
December 31, 2009 and 2008, in conformity with U.S. generally accepted accounting principles.

/s/ Ernst & Young LLP

Sacramento, California

March 5, 2010



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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

The Board of Directors and Stockholders

Volcano Corporation:

We have audited Volcano
Corporations internal control over financial reporting as of December 31, 2010, based on criteria established in Internal Control  Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway
Commission (COSO). Volcano Corporations management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in the
accompanying Managements Report on Internal Control Over Financial Reporting. Our responsibility is to express an opinion on Volcano Corporations internal control over financial reporting based on our audit.

We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we
plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial
reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audit also included performing such other procedures as we
considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

A companys internal
control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted
accounting principles. A companys internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions
and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that
receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized
acquisition, use, or disposition of the companys assets that could have a material effect on the financial statements.

Because of its
inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of
changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

In our opinion, Volcano Corporation
maintained, in all material respects, effective internal control over financial reporting as of December 31, 2010, based on criteria established in Internal Control  Integrated Framework issued by the Committee of Sponsoring
Organizations of the Treadway Commission.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight
Board (United States), the consolidated balance sheet of Volcano Corporation and subsidiaries as of December 31, 2010, and the related consolidated statements of operations, stockholders equity and comprehensive income (loss), and
cash flows for the year ended December 31, 2010, and our report dated February 28, 2011, expressed an unqualified opinion on those consolidated financial statements.

/s/ KPMG LLP

San Diego, California

February 28, 2011



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VOLCANO CORPORATION

CONSOLIDATED BALANCE SHEETS

(in thousands, except per share data)



|                                                                                                                                                                                                                  |  |              |          |   |      |   |          |  
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |  | ------------ | -------- | - | ---- | - | -------- | -
|                                                                                                                                                                                                                  |  | December 31, |         
|                                                                                                                                                                                                                  |  | 2010         |          |   | 2009 |  
|Assets                                                                                                                                                                                                            |  |              |          |   |      |   |          |  
|Current assets:                                                                                                                                                                                                   |  |              |          |   |      |   |          |  
|Cash and cash equivalents                                                                                                                                                                                         |  | $            | 43,429   |   |      | $ | 56,055   |  
|Short-term available-for-sale investments                                                                                                                                                                         |  |              | 175,283  |   |      |   | 66,028   |  
|Accounts receivable, net                                                                                                                                                                                          |  |              | 59,133   |   |      |   | 51,171   |  
|Inventories                                                                                                                                                                                                       |  |              | 40,499   |   |      |   | 37,710   |  
|Prepaid expenses and other current assets                                                                                                                                                                         |  |              | 6,643    |   |      |   | 5,892    |  
|                                                                                                                                                                                                                  |  |              |          |   |      |   |          |  
|Total current assets                                                                                                                                                                                              |  |              | 324,987  |   |      |   | 216,856  |  
|Restricted cash                                                                                                                                                                                                   |  |              | 638      |   |      |   | 554      |  
|Long-term available-for-sale investments                                                                                                                                                                          |  |              | 26,804   |   |      |   |         |  
|Property and equipment, net of accumulated depreciation of $46,299 and $32,539, respectively                                                                                                                      |  |              | 56,503   |   |      |   | 44,734   |  
|Intangible assets, net                                                                                                                                                                                            |  |              | 17,103   |   |      |   | 11,623   |  
|Goodwill                                                                                                                                                                                                          |  |              | 2,487    |   |      |   | 931      |  
|Other non-current assets                                                                                                                                                                                          |  |              | 3,044    |   |      |   | 2,036    |  
|                                                                                                                                                                                                                  |  |              |          |   |      |   |          |  
|Total assets                                                                                                                                                                                                      |  | $            | 431,566  |   |      | $ | 276,734  |  
|                                                                                                                                                                                                                  |  |              |          |   |      |   |          |  
|Liabilities and Stockholders Equity                                                                                                                                                                              |  |              |          |   |      |   |          |  
|Current liabilities:                                                                                                                                                                                              |  |              |          |   |      |   |          |  
|Accounts payable                                                                                                                                                                                                  |  | $            | 13,895   |   |      | $ | 13,840   |  
|Accrued compensation                                                                                                                                                                                              |  |              | 18,241   |   |      |   | 14,142   |  
|Accrued expenses and other current liabilities                                                                                                                                                                    |  |              | 21,960   |   |      |   | 25,275   |  
|Deferred revenues                                                                                                                                                                                                 |  |              | 5,898    |   |      |   | 4,881    |  
|Current maturities of long-term debt                                                                                                                                                                              |  |              | 56       |   |      |   | 50       |  
|                                                                                                                                                                                                                  |  |              |          |   |      |   |          |  
|Total current liabilities                                                                                                                                                                                         |  |              | 60,050   |   |      |   | 58,188   |  
|Convertible senior notes                                                                                                                                                                                          |  |              | 91,162   |   |      |   |         |  
|Other long-term debt                                                                                                                                                                                              |  |              | 74       |   |      |   | 110      |  
|Deferred revenues                                                                                                                                                                                                 |  |              | 2,466    |   |      |   | 2,376    |  
|Other                                                                                                                                                                                                             |  |              | 3,478    |   |      |   | 1,245    |  
|                                                                                                                                                                                                                  |  |              |          |   |      |   |          |  
|Total liabilities                                                                                                                                                                                                 |  |              | 157,230  |   |      |   | 61,919   |  
|                                                                                                                                                                                                                  |  |             
|Commitments and contingencies (Note 4)                                                                                                                                                                            |  |              |          |   |      |   |          |  
|                                                                                                                                                                                                                  |  |             
|Stockholders equity:                                                                                                                                                                                             |  |              |          |   |      |   |          |  
|Preferred stock, par value of $0.001; 10,000 shares authorized; no shares issued and outstanding at December 31, 2010 and
December 31, 2009                                                                       |  |              |         |   |      |   |         |  
|Common stock, par value of $0.001; 250,000 shares authorized at December 31, 2010 and December 31, 2009; 51,366 and
48,790 shares issued and outstanding at December 31, 2010 and December 31, 2009, respectively |  |              | 51       |   |      |   | 49       |  
|Additional paid-in capital                                                                                                                                                                                        |  |              | 402,895  |   |      |   | 352,102  |  
|Accumulated other comprehensive loss                                                                                                                                                                              |  |              | (593     | ) |      |   | (4,079   | )
|Accumulated deficit                                                                                                                                                                                               |  |              | (128,017 | ) |      |   | (133,257 | )
|                                                                                                                                                                                                                  |  |              |          |   |      |   |          |  
|Total stockholders equity                                                                                                                                                                                        |  |              | 274,336  |   |      |   | 214,815  |  
|                                                                                                                                                                                                                  |  |              |          |   |      |   |          |  
|Total liabilities and stockholders equity                                                                                                                                                                        |  | $            | 431,566  |   |      | $ | 276,734  |  
|                                                                                                                                                                                                                  |  |              |          |   |      |   |          |  

See notes to consolidated financial statements.



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VOLCANO CORPORATION

CONSOLIDATED STATEMENTS OF OPERATIONS

(in thousands, except per share data)



|                                                        |  |                          |         |   |      |   |         |      |  |   |         |  
|------------------------------------------------------- |  | ------------------------ | ------- | - | ---- | - | ------- | ---- |  | - | ------- | -
|                                                        |  | Years Ended December 31, |        
|                                                        |  | 2010                     |         |   | 2009 |   |         | 2008 | 
|Revenues                                                |  | $                        | 294,146 |   |      | $ | 227,867 |      |  | $ | 171,495 |  
|Cost of revenues, excluding amortization of intangibles |  |                          | 108,860 |   |      |   | 91,489  |      |  |   | 64,293  |  
|                                                        |  |                          |         |   |      |   |         |      |  |   |         |  
|Gross profit                                            |  |                          | 185,286 |   |      |   | 136,378 |      |  |   | 107,202 |  
|Operating expenses:                                     |  |                          |         |   |      |   |         |      |  |   |         |  
|Selling, general and administrative                     |  |                          | 133,174 |   |      |   | 111,598 |      |  |   | 84,369  |  
|Research and development                                |  |                          | 42,517  |   |      |   | 37,372  |      |  |   | 26,690  |  
|Amortization of intangibles                             |  |                          | 2,559   |   |      |   | 4,224   |      |  |   | 3,125   |  
|In-process research and development                     |  |                          | (2,935  | ) |      |   | 14,030  |      |  |   | 12,681  |  
|                                                        |  |                          |         |   |      |   |         |      |  |   |         |  
|Total operating expenses                                |  |                          | 175,315 |   |      |   | 167,224 |      |  |   | 126,865 |  
|                                                        |  |                          |         |   |      |   |         |      |  |   |         |  
|Operating income (loss)                                 |  |                          | 9,971   |   |      |   | (30,846 | )    |  |   | (19,663 | )
|Interest income                                         |  |                          | 477     |   |      |   | 756     |      |  |   | 4,828   |  
|Interest expense                                        |  |                          | (2,192  | ) |      |   | (5      | )    |  |   | (113    | )
|Exchange rate (loss) gain                               |  |                          | (904    | ) |      |   | 2,328   |      |  |   | 1,809   |  
|Other, net                                              |  |                          | (25     | ) |      |   |        |      |  |   | 54      |  
|                                                        |  |                          |         |   |      |   |         |      |  |   |         |  
|Income (loss) before provision for income taxes         |  |                          | 7,327   |   |      |   | (27,767 | )    |  |   | (13,085 | )
|Provision for income taxes                              |  |                          | 2,087   |   |      |   | 1,187   |      |  |   | 620     |  
|                                                        |  |                          |         |   |      |   |         |      |  |   |         |  
|Net income (loss)                                       |  | $                        | 5,240   |   |      | $ | (28,954 | )    |  | $ | (13,705 | )
|                                                        |  |                          |         |   |      |   |         |      |  |   |         |  
|Net income (loss) per share:                            |  |                          |         |   |      |   |         |      |  |   |         |  
|Basic                                                   |  | $                        | 0.10    |   |      | $ | (0.60   | )    |  | $ | (0.29   | )
|                                                        |  |                          |         |   |      |   |         |      |  |   |         |  
|Diluted                                                 |  | $                        | 0.10    |   |      | $ | (0.60   | )    |  | $ | (0.29   | )
|                                                        |  |                          |         |   |      |   |         |      |  |   |         |  
|Shares used in calculating net income (loss) per share: |  |                          |         |   |      |   |         |      |  |   |         |  
|Basic                                                   |  |                          | 50,551  |   |      |   | 48,400  |      |  |   | 47,376  |  
|                                                        |  |                          |         |   |      |   |         |      |  |   |         |  
|Diluted                                                 |  |                          | 53,281  |   |      |   | 48,400  |      |  |   | 47,376  |  
|                                                        |  |                          |         |   |      |   |         |      |  |   |         |  

See notes to consolidated financial statements.



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VOLCANO CORPORATION

CONSOLIDATED STATEMENTS STOCKHOLDERS EQUITY AND COMPREHENSIVE INCOME (LOSS)

(in thousands)



|                                                                                    |  |              |        |  |                          |   |    |                                   |  |   |                    |   |  |                          |        |   |  |   |          |   |  |   |         |  
|----------------------------------------------------------------------------------- |  | ------------ | ------ |  | ------------------------ | - | -- | --------------------------------- |  | - | ------------------ | - |  | ------------------------ | ------ | - |  | - | -------- | - |  | - | ------- | -
|                                                                                    |  | Common Stock |        |  | AdditionalPaid-InCapital |   |    | AccumulatedOtherComprehensiveLoss |  |   | AccumulatedDeficit |   |  | TotalStockholdersEquity |       
|                                                                                    |  | Shares       |        |  | Amount                   |   |    |                                   |  |  
|Balance at December 31, 2007                                                        |  |              | 46,957 |  |                          | $ | 47 |                                   |  | $ | 324,746            |   |  | $                        | (1,258 | ) |  | $ | (90,598  | ) |  | $ | 232,937 |  
|Issuance of common stock under equity compensation plans                            |  |              | 822    |  |                          |   | 1  |                                   |  |   | 2,770              |   |  |                          |        |   |  |   |          |   |  |   | 2,771   |  
|Employee stock-based compensation cost                                              |  |              |        |  |                          |   |    |                                   |  |   | 9,317              |   |  |                          |        |   |  |   |          |   |  |   | 9,317   |  
|Non-employee stock-based compensation cost                                          |  |              |        |  |                          |   |    |                                   |  |   | 230                |   |  |                          |        |   |  |   |          |   |  |   | 230     |  
|Exercise of warrants                                                                |  |              | 104    |  |                          |   |    |                                   |  |   |                    |   |  |                          |        |   |  |   |          |   |  |   |        |  
|Comprehensive loss                                                                  |  |              |        |  |                          |   |    |                                   |  |   |                    |   |  |                          |        |   |  |   |          |   |  |   |         |  
|Net loss                                                                            |  |              |        |  |                          |   |    |                                   |  |   |                    |   |  |                          |        |   |  |   | (13,705  | ) |  |   | (13,705 | )
|Foreign currency translation adjustments                                            |  |              |        |  |                          |   |    |                                   |  |   |                    |   |  |                          | (1,830 | ) |  |   |          |   |  |   | (1,830  | )
|Changes in unrealized gain/loss on available-for-sale investments                   |  |              |        |  |                          |   |    |                                   |  |   |                    |   |  |                          | 12     |   |  |   |          |   |  |   | 12      |  
|                                                                                    |  |              |        |  |                          |   |    |                                   |  |   |                    |   |  |                          |        |   |  |   |          |   |  |   |         |  
|Total comprehensive loss                                                            |  |              |        |  |                          |   |    |                                   |  |   |                    |   |  |                          |        |   |  |   |          |   |  |   | (15,523 | )
|                                                                                    |  |              |        |  |                          |   |    |                                   |  |   |                    |   |  |                          |        |   |  |   |          |   |  |   |         |  
|Balance at December 31, 2008                                                        |  |              | 47,883 |  |                          | $ | 48 |                                   |  | $ | 337,063            |   |  | $                        | (3,076 | ) |  | $ | (104,303 | ) |  | $ | 229,732 |  
|Issuance of common stock under equity compensation plans, net of shares repurchased |  |              | 907    |  |                          |   | 1  |                                   |  |   | 4,155              |   |  |                          |        |   |  |   |          |   |  |   | 4,156   |  
|Employee stock-based compensation cost                                              |  |              |        |  |                          |   |    |                                   |  |   | 10,613             |   |  |                          |        |   |  |   |          |   |  |   | 10,613  |  
|Non-employee stock-based compensation cost                                          |  |              |        |  |                          |   |    |                                   |  |   | 271                |   |  |                          |        |   |  |   |          |   |  |   | 271     |  
|Comprehensive loss                                                                  |  |              |        |  |                          |   |    |                                   |  |   |                    |   |  |                          |        |   |  |   |          |   |  |   |         |  
|Net loss                                                                            |  |              |        |  |                          |   |    |                                   |  |   |                    |   |  |                          |        |   |  |   | (28,954  | ) |  |   | (28,954 | )
|Foreign currency translation adjustments                                            |  |              |        |  |                          |   |    |                                   |  |   |                    |   |  |                          | (931   | ) |  |   |          |   |  |   | (931    | )
|Changes in unrealized gain/loss on available-for-sale investments                   |  |              |        |  |                          |   |    |                                   |  |   |                    |   |  |                          | (72    | ) |  |   |          |   |  |   | (72     | )
|                                                                                    |  |              |        |  |                          |   |    |                                   |  |   |                    |   |  |                          |        |   |  |   |          |   |  |   |         |  
|Total comprehensive loss                                                            |  |              |        |  |                          |   |    |                                   |  |   |                    |   |  |                          |        |   |  |   |          |   |  |   | (29,957 | )
|                                                                                    |  |              |        |  |                          |   |    |                                   |  |   |                    |   |  |                          |        |   |  |   |          |   |  |   |         |  
|Balance at December 31, 2009                                                        |  |              | 48,790 |  |                          | $ | 49 |                                   |  | $ | 352,102            |   |  | $                        | (4,079 | ) |  | $ | (133,257 | ) |  | $ | 214,815 |  
|Issuance of common stock under equity compensation plans, net of shares repurchased |  |              | 1,967  |  |                          |   | 1  |                                   |  |   | 16,111             |   |  |                          |        |   |  |   |          |   |  |   | 16,112  |  
|Employee stock-based compensation cost                                              |  |              |        |  |                          |   |    |                                   |  |   | 11,752             |   |  |                          |        |   |  |   |          |   |  |   | 11,752  |  
|Non-employee stock-based compensation cost                                          |  |              |        |  |                          |   |    |                                   |  |   | 673                |   |  |                          |        |   |  |   |          |   |  |   | 673     |  
|Issuance of common stock related to acquisitions                                    |  |              | 609    |  |                          |   | 1  |                                   |  |   | 10,468             |   |  |                          |        |   |  |   |          |   |  |   | 10,469  |  
|Equity component of convertible senior notes                                        |  |              |        |  |                          |   |    |                                   |  |   | 22,263             |   |  |                          |        |   |  |   |          |   |  |   | 22,263  |  
|Call options purchased in connection with convertible senior note                   |  |              |        |  |                          |   |    |                                   |  |   | (27,190            | ) |  |                          |        |   |  |   |          |   |  |   | (27,190 | )
|Issuance of warrants                                                                |  |              |        |  |                          |   |    |                                   |  |   | 17,149             |   |  |                          |        |   |  |   |          |   |  |   | 17,149  |  
|Portion of convertible bond issuance costs attributed to equity component           |  |              |        |  |                          |   |    |                                   |  |   | (866               | ) |  |                          |        |   |  |   |          |   |  |   | (866    | )
|Tax benefit related to stock-based compensation                                     |  |              |        |  |                          |   |    |                                   |  |   | 433                |   |  |                          |        |   |  |   |          |   |  |   | 433     |  
|Comprehensive income                                                                |  |              |        |  |                          |   |    |                                   |  |   |                    |   |  |                          |        |   |  |   |          |   |  |   |         |  
|Net income                                                                          |  |              |        |  |                          |   |    |                                   |  |   |                    |   |  |                          |        |   |  |   | 5,240    |   |  |   | 5,240   |  
|Foreign currency translation adjustments                                            |  |              |        |  |                          |   |    |                                   |  |   |                    |   |  |                          | 3,494  |   |  |   |          |   |  |   | 3,494   |  
|Changes in unrealized gain/loss on available-for-sale investments                   |  |              |        |  |                          |   |    |                                   |  |   |                    |   |  |                          | (8     | ) |  |   |          |   |  |   | (8      | )
|                                                                                    |  |              |        |  |                          |   |    |                                   |  |   |                    |   |  |                          |        |   |  |   |          |   |  |   |         |  
|Total comprehensive income                                                          |  |              |        |  |                          |   |    |                                   |  |   |                    |   |  |                          |        |   |  |   |          |   |  |   | 8,726   |  
|                                                                                    |  |              |        |  |                          |   |    |                                   |  |   |                    |   |  |                          |        |   |  |   |          |   |  |   |         |  
|Balance at December 31, 2010                                                        |  |              | 51,366 |  |                          | $ | 51 |                                   |  | $ | 402,895            |   |  | $                        | (593   | ) |  | $ | (128,017 | ) |  | $ | 274,336 |  
|                                                                                    |  |              |        |  |                          |   |    |                                   |  |   |                    |   |  |                          |        |   |  |   |          |   |  |   |         |  

See notes to consolidated financial statements.



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VOLCANO CORPORATION

CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)



|                                                                                          |  |                          |          |   |      |   |          |      |  |   |          |  
|----------------------------------------------------------------------------------------- |  | ------------------------ | -------- | - | ---- | - | -------- | ---- |  | - | -------- | -
|                                                                                          |  | Years Ended December 31, |         
|                                                                                          |  | 2010                     |          |   | 2009 |   |          | 2008 | 
|Operating activities                                                                      |  |                          |          |   |      |   |          |      |  |   |          |  
|Net income (loss)                                                                         |  | $                        | 5,240    |   |      | $ | (28,954  | )    |  | $ | (13,705  | )
|Adjustments to reconcile net loss to net cash provided by (used in) operating activities: |  |                          |          |   |      |   |          |      |  |   |          |  
|In-process research and development expense                                               |  |                          | (2,935   | ) |      |   | 14,030   |      |  |   | 12,681   |  
|Depreciation and amortization                                                             |  |                          | 18,699   |   |      |   | 16,181   |      |  |   | 9,357    |  
|Amortization (accretion) of investment premium (discount), net                            |  |                          | 1,130    |   |      |   | 626      |      |  |   | (652     | )
|Accretion of debt discount on convertible senior notes                                    |  |                          | 1,211    |   |      |   |         |      |  |   |         |  
|Non-cash stock compensation expense                                                       |  |                          | 12,467   |   |      |   | 10,885   |      |  |   | 9,527    |  
|Other non-cash adjustments                                                                |  |                          | 2,115    |   |      |   | (273     | )    |  |   | (1,809   | )
|Loss on disposal of long-lived assets                                                     |  |                          | 596      |   |      |   | 528      |      |  |   | 70       |  
|Changes in operating assets and liabilities, net of acquisitions:                         |  |                          |          |   |      |   |          |      |  |   |          |  
|Accounts receivable                                                                       |  |                          | (6,420   | ) |      |   | (8,858   | )    |  |   | (10,487  | )
|Inventories                                                                               |  |                          | (946     | ) |      |   | (8,498   | )    |  |   | (5,029   | )
|Prepaid expenses and other assets                                                         |  |                          | (1,507   | ) |      |   | 251      |      |  |   | (3,185   | )
|Accounts payable                                                                          |  |                          | 714      |   |      |   | (1,112   | )    |  |   | 2,151    |  
|Accrued compensation                                                                      |  |                          | 4,037    |   |      |   | 1,393    |      |  |   | 3,131    |  
|Accrued expenses and other liabilities                                                    |  |                          | 10,654   |   |      |   | 1,674    |      |  |   | 36       |  
|Deferred revenues                                                                         |  |                          | 1,128    |   |      |   | 476      |      |  |   | 301      |  
|                                                                                          |  |                          |          |   |      |   |          |      |  |   |          |  
|Net cash provided by (used in) operating activities                                       |  |                          | 46,183   |   |      |   | (1,651   | )    |  |   | 2,387    |  
|                                                                                          |  |                          |          |   |      |   |          |      |  |   |          |  
|Investing activities                                                                      |  |                          |          |   |      |   |          |      |  |   |          |  
|Purchase of short-term and long-term available-for-sale securities                        |  |                          | 233,960  |   |      |   | (146,932 | )    |  |   | (103,029 | )
|Sale or maturity of short-term and long-term available-for-sale securities                |  |                          | 97,204   |   |      |   | 129,098  |      |  |   | 121,006  |  
|Capital expenditures                                                                      |  |                          | (25,302  | ) |      |   | (26,146  | )    |  |   | (15,474  | )
|Cash paid for acquisitions, net of cash acquired                                          |  |                          | (4,200   | ) |      |   | (613     | )    |  |   | (29,711  | )
|Cash paid for other intangibles                                                           |  |                          | (3,864   | ) |      |   | (315     | )    |  |   | (480     | )
|Proceeds from net settlement of foreign currency contracts                                |  |                          | 1,584    |   |      |   | 525      |      |  |   |         |  
|Payment for foreign currency exchange contracts                                           |  |                          | (4,356   | ) |      |   |         |      |  |   |         |  
|                                                                                          |  |                          |          |   |      |   |          |      |  |   |          |  
|Net cash used in investing activities                                                     |  |                          | (172,894 | ) |      |   | (44,383  | )    |  |   | (27,688  | )
|                                                                                          |  |                          |          |   |      |   |          |      |  |   |          |  
|Financing activities                                                                      |  |                          |          |   |      |   |          |      |  |   |          |  
|Repayment of long-term debt                                                               |  |                          | (29      | ) |      |   | (54      | )    |  |   | (126     | )
|Repayment of short-term debt                                                              |  |                          | (1       | ) |      |   | (151     | )    |  |   |         |  
|Proceeds from sale of common stock under employee stock purchase plan                     |  |                          | 2,741    |   |      |   | 2,122    |      |  |   | 1,565    |  
|Proceeds from exercise of common stock options                                            |  |                          | 13,371   |   |      |   | 2,450    |      |  |   | 1,202    |  
|Proceeds from issuance of convertible senior notes                                        |  |                          | 115,000  |   |      |   |         |      |  |   |         |  
|Payment of debt issuance costs                                                            |  |                          | (4,428   | ) |      |   |         |      |  |   |         |  
|Purchase of call options                                                                  |  |                          | (27,190  | ) |      |   |         |      |  |   |         |  
|Proceeds from issuance of warrants                                                        |  |                          | 17,149   |   |      |   |         |      |  |   |         |  
|Tax benefit related to stock-based compensation                                           |  |                          | 433      |   |      |   |         |      |  |   |         |  
|Repurchases of common stock                                                               |  |                          |         |   |      |   | (416     | )    |  |   |         |  
|Release of restricted cash                                                                |  |                          |         |   |      |   | 70       |      |  |   | 231      |  
|Increases of restricted cash                                                              |  |                          | (111     | ) |      |   | (286     | )    |  |   |         |  
|                                                                                          |  |                          |          |   |      |   |          |      |  |   |          |  
|Net cash provided by financing activities                                                 |  |                          | 116,935  |   |      |   | 3,735    |      |  |   | 2,872    |  
|Effect of exchange rate changes on cash and cash equivalents                              |  |                          | (2,850   | ) |      |   | (2,595   | )    |  |   | 465      |  
|                                                                                          |  |                          |          |   |      |   |          |      |  |   |          |  
|Net increase (decrease) in cash and cash equivalents                                      |  |                          | (12,626  | ) |      |   | (44,894  | )    |  |   | (21,964  | )
|Cash and cash equivalents, beginning of year                                              |  |                          | 56,055   |   |      |   | 100,949  |      |  |   | 122,913  |  
|                                                                                          |  |                          |          |   |      |   |          |      |  |   |          |  
|Cash and cash equivalents, end of year                                                    |  | $                        | 43,429   |   |      | $ | 56,055   |      |  | $ | 100,949  |  
|                                                                                          |  |                          |          |   |      |   |          |      |  |   |          |  
|Supplemental disclosures of cash flow information:                                        |  |                          |          |   |      |   |          |      |  |   |          |  
|Cash paid for interest                                                                    |  | $                        | 63       |   |      | $ | 5        |      |  | $ | 113      |  
|Cash paid for income taxes                                                                |  | $                        | 248      |   |      | $ | 1,810    |      |  | $ | 643      |  
|Supplemental disclosures of non-cash investing activities:                                |  |                          |          |   |      |   |          |      |  |   |          |  
|Issuance of common stock related to milestone payment                                     |  | $                        | 10,469   |   |      | $ |         |      |  | $ |         |  

See notes to
consolidated financial statements.



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VOLCANO CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1. Organization and Summary of Significant Accounting Policies

Our Company

Volcano Corporation (we, us, our, Volcano or the Company),
formerly Volcano Therapeutics, Inc., was incorporated under the laws of the State of Delaware on January 12, 2000. We design, develop, manufacture and commercialize a broad suite of intravascular ultrasound (IVUS) and functional
measurement (FM) products that we believe enhance the diagnosis and treatment of vascular and structural heart disease. Our products consist of consoles which have been designed to serve as a multi-modality platform for our phased array
and rotational IVUS catheters, fractional flow reserve (FFR) pressure wires and Medtronics Pioneer reentry device. We are developing additional offerings for integration into the platform, including, forward-looking IVUS
(FL.IVUS) catheters, image-guided therapy catheters and ultra-high resolution Optical Coherence Tomography (OCT) systems and catheters.

Our IVUS products include single-procedure disposable phased array and rotational IVUS imaging catheters and additional functionality options such as virtual histology (VH) IVUS tissue
characterization and ChromaFlo stent apposition analysis. Our FM offerings include FM consoles and single-procedure disposable pressure and flow guide wires used to measure the pressure and flow characteristics of blood around plaque enabling
physicians to gauge the plaques physiological impact on blood flow and pressure.

We also develop and manufacture
optical monitors, laser and non-laser light sources, and optical engines used in OCT imaging systems as well as micro-optical spectrometers and optical channel monitors used by telecommunications and other industrial companies.

Basis of Presentation and Principles of Consolidation

Our consolidated financial statements include our financial statements and the financial statements of our wholly-owned subsidiaries: Volcano Japan Co. Ltd. (Volcano Japan), Volcano Europe
S.A./N.V. (Volcano Europe), Axsun Technologies, Inc. (Axsun), Volcano Therapeutics South Africa (Pty) Ltd. (Volcano South Africa), a wholly-owned subsidiary of Volcano Europe, Volcano Netherlands Holdings, B.V.
(Volcano Netherlands), and Volcarica, Socieded de Responsabilidad Limitada, a wholly-owned subsidiary of Volcano Netherlands. The operating results associated with acquired entities have been included in our consolidated financial
statements since the date of acquisition. All significant intercompany balances and transactions have been eliminated in consolidation.

Operating Segments

Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) Topic 280, Segment
Reporting (ASC 280), establishes standards for the way public business enterprises report information about operating segments. ASC 280 also establishes standards for related disclosures about products and services, geographic areas
and major customers.

Historically, we considered ourselves to be a single reporting segment, specifically the manufacture,
sale, discovery, development and commercialization of products for the diagnosis of atherosclerosis in the coronary arteries and peripheral vascular system (our medical segment). In connection with our acquisition of Axsun in
December 2008, we began operating an additional segment, specifically the discovery, development, manufacture and sale of micro-optical spectrometers and optical channel monitors to telecommunications and other industrial companies (our
industrial segment). The revenues and expenses related to this segment were not material to our overall operating results for the year ended December 31, 2008, therefore our reporting for the industrial segment commenced on
January 1, 2009. See Note 7 Segment and Geographic Information for additional details regarding our segments.



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Use of Estimates

The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets
and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Estimates are used for, but not limited to, the allowance for
doubtful accounts, inventory reserves, depreciation and amortization, intangible assets, long-term investments in subsidiaries, sales returns, business combinations, warranty costs, certain accruals, long-lived asset impairment calculations and
contingencies. Actual results could differ materially from the estimates and assumptions we use in the preparation of our consolidated financial statements.

Foreign Currency Translation

The euro is the functional currency of
Volcano Europe, as it is the primary currency within the economic environment in which it operates. Assets and liabilities of Volcano Europes operations are translated into U.S. dollars at period-end exchange rates, and revenues and expenses
are translated into U.S. dollars at average exchange rates in effect during each reporting period. Adjustments resulting from the translation are reported in other comprehensive loss.

On July 1, 2009, we adopted the Japanese yen as the functional currency for Volcano Japan. Consistent with the considerations
specified in FASB ASC Topic 830, Foreign Currency Matters, the change was made to reflect recent developments with our Japan operations, including increases in direct sales denominated in the Japanese yen and growth in the local
infrastructure that has enabled the day-to-day operations of Volcano Japan to become relatively self-contained and integrated into the Japanese economic environment. At December 31, 2010 and 2009, assets and liabilities of Volcano Japans
operations are translated into U.S. dollars at period-end exchange rates. Commencing July 1, 2009, revenues and expenses are translated into U.S. dollars at average exchange rates in effect during each reporting period and adjustments resulting
from the translation are reported on our consolidated balance sheet in accumulated other comprehensive loss.

Prior to
July 1, 2009, the U.S. dollar was the functional currency of Volcano Japan. For the year ended December 31, 2008 and the six months ended June 30, 2009, yen-based expenses were converted into U.S. dollars at average exchange rates in
effect during each reporting period and adjustments resulting from the translation were recorded as foreign currency transaction gains or losses and included in exchange rate gain in the consolidated statement of operations.

Exchange rate fluctuations resulting from the translation of the inter-company balances between Volcano Corporation, our U.S. entity, and
Volcano Japan, and Volcano Corporation and Volcano Europe, and other non-U.S. dollar denominated liabilities into U.S. dollars are recorded as foreign currency transaction gains or losses and are included in exchange rate (loss) gain in the
consolidated statement of operations. On October 1, 2009, approximately $23.4 million of intercompany receivable owed to Volcano Corporation from Volcano Japan was converted into a long-term investment, resulting in a decrease in the amount of
yen-based receivables being marked-to-market. In April 2008, $22.6 million of intercompany receivable owed to Volcano Corporation from Volcano Europe was converted into equity, resulting in a decrease in the amount of euro-based receivables being
marked-to-market. These conversions thereby reduce the impact of the exchange rate fluctuations in our consolidated statements of operations.

Cash and Cash Equivalents

All highly liquid investments with original final maturities of three months or less on the date of purchase are considered to be cash equivalents.



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Available-for-Sale Investments

Our short-term and long-term available-for-sale investments (Investments) consist of highly liquid financial investments with
original final maturities of eighteen months or less. Our short-term available-for-sale investments consisted of highly liquid financial investments with original final maturities over three months to one year or less, and our long-term
available-for-sale investments consisted of investments with original final maturities over one year. All Investments are classified as available-for-sale and are recorded at market value using the specific identification method. Unrealized gains
and losses are reflected in other comprehensive loss.

Financial Instruments

Financial instruments included in our financial statements are comprised of cash and cash equivalents and Investments, foreign exchange
forward contracts, accounts receivable, accounts payable, certain other accrued liabilities and debt. The carrying amounts of cash and cash equivalents, Investments, accounts receivable, accounts payable, other accrued liabilities and short-term
debt approximate their fair values due to the short-term nature of those instruments. The fair value of our long-term investments approximate their carrying values based upon market rates of interest. The fair value of our Notes is influenced by
interest rates and our stock price, and stock price volatility, which is determined by market trading.

In October 2009, we
began using foreign exchange forward contracts to manage a portion of the foreign currency risk for our monetary assets denominated in the yen and the euro. We only use derivative financial instruments to reduce the risk that our earnings and cash
flows will be adversely affected by changes in exchange rates; we do not hold any derivative financial instruments for trading or speculative purposes. We primarily use forward exchange contracts to hedge foreign currency exposures related to our
intercompany receivable balances, and they generally have terms of one year or less. Realized and unrealized gains or losses on the value of financial contracts used to hedge the exchange rate exposure of these monetary assets and liabilities are
also included in the determination of net income, as these transactions have not been designated for hedge accounting. These contracts effectively fix the exchange rate at which these specific monetary assets and liabilities will be settled so that
gains or losses on the forward contracts offset the losses or gains from changes in the value of the underlying monetary assets and liabilities. These contracts contain net settlement features. We offset fair value amounts recognized for receivables
and payables arising from our foreign exchange forward contracts with our counterparty.

Concentration of Credit Risk

Financial instruments which subject us to potential credit risk consist of our cash and cash equivalents, Investments
and accounts receivable. We have established guidelines to limit our exposure to credit risk by placing investments with high credit quality financial institutions, diversifying our investment portfolio and holding investments with maturities that
maintain safety and liquidity. We place our cash and cash equivalents with high credit quality financial institutions. Deposits with these financial institutions may exceed the amount of insurance provided; however, these deposits typically are
redeemable upon demand. Therefore we believe the financial risks associated with these financial instruments are minimal.

Trade accounts receivable are recorded at the net invoice value and are not interest bearing. We consider receivables past due based on
the contractual payment terms. We perform ongoing credit evaluations of our customers, and generally we do not require collateral on our accounts receivable. We estimate the need for allowances for potential credit losses based on historical
collection activity and the facts and circumstances relevant to specific customers and we record a provision for uncollectible accounts when collection is uncertain. To date, we have not experienced significant credit related losses.

Goodman Company, Ltd. (Goodman) was a distributor of our products in Japan until the agreement was terminated as discussed in
Note 4 Commitments and Other Contractual Obligations. Sales to Goodman accounted for 14% of our total revenues for 2008. Goodman revenues are reported in our medical segment. No single customer accounted for more than 10% of our revenues
for 2010 or 2009, and no other single customer accounted for more than 10% of our revenues in 2008. No single customer accounted for more than 10% of our trade receivables at December 31, 2010 or 2009.



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We currently hold foreign exchange forward contracts with a single counterparty. The bank
counterparty in these contracts exposes us to credit-related losses in the event of their nonperformance and we do not require collateral for their performance. However, to mitigate that risk, we only contract with counterparties who meet our
minimum credit quality guidelines. In addition, our exposure in the event of a default by our counterparty is limited to the changes in value of our hedged balances.

In connection with the issuance of our 2.875% Convertible Senior Notes, we purchased call options from JPMorgan Chase Bank, National Association (JPMorgan Chase). Non-performance by JPMorgan
Chase under these call options would potentially expose us to dilution of our common stock to the extent our stock price exceeds the conversion price. See Note 3 Financial Statement DetailsConvertible Debt for additional
information.

We purchase integrated circuits and other key components for use in our products. For certain components, which
are currently single sourced, there are relatively few sources of supply. Although we believe that other suppliers could provide similar components on comparable terms, establishment of additional or replacement suppliers cannot be accomplished
quickly. Any significant supply interruption could have a material adverse effect on our business, financial condition and results of operations. For further discussion, see Risk FactorsOur manufacturing operations are dependent upon
third party suppliers, which makes us vulnerable to supply problems, price fluctuations and manufacturing delays.

Inventories

Inventories are valued at the lower of cost (first-in, first-out basis) or market value (net realizable value or
replacement cost).

Restricted Cash

At December 31, 2010 and 2009, we had restricted cash totaling $638,000 and $554,000, respectively. Restricted cash consists of approximately $202,000 and $200,000 at December 31, 2010 and 2009,
respectively, in certificates of deposit restricted as to withdrawal and serves as a security deposit for a leased facility that expired in 2010; $314,000 and $288,000 at December 31, 2010 and 2009, respectively, restricted as to withdrawal to
provide collateral for our performance to customers in a foreign jurisdiction; and the remaining amounts at December 31, 2010 and 2009 serve as collateral to various operating leases. The certificates of deposit and cash in the bank will remain
restricted as to withdrawal until such time as the current obligation is terminated.

Property and Equipment

Property and equipment is stated at cost, net of accumulated depreciation and amortization. Equipment and capitalized software are
depreciated over the estimated useful lives of the assets (generally three to five years). Leasehold improvements are amortized over the lesser of the lease term including renewal periods that are reasonably assured or the estimated useful lives of
the improvements, which is between three and ten years. The straight-line method is used for depreciation and amortization. Significant improvements which substantially extend the useful lives of assets are capitalized. Expenditures for maintenance
and repairs are charged to expense as incurred.

Assets held under capital leases are recorded at the net present value of the
minimum lease payments of the leased asset at the inception of the lease. Amortization expense is computed using the straight-line method over the shorter of the estimated useful lives of the assets or the period of the related lease and is included
in our depreciation expense.



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Goodwill and Intangible Assets

We account for goodwill and other intangible assets in accordance with FASB ASC Topic 350, IntangiblesGoodwill and Other,
(ASC 350). The purchase method of accounting for acquisitions requires extensive use of accounting estimates and judgments to allocate the purchase price to the fair value of the net tangible and intangible assets acquired. We use the
discounted cash flow method to estimate the value of intangible assets acquired. The estimates used to value and amortize intangible assets are consistent with the plans and estimates that we use to manage our business and are based on available
historical information and industry estimates and averages.

At December 31, 2010 and 2009, our goodwill relates to the
acquisitions of Axsun and Fluid Medical, Inc. (Fluid Medical). We intend to integrate Axsuns OCT technology and Fluid Medicals imaging technology in our future medical product offerings, therefore our goodwill is allocated
entirely to our medical segment.

Intangible assets consist of acquired developed technology, licenses, customer
relationships, assembled technology, patents and trademarks, as well as in-process technology related to Fluid Medicals imaging technology program. Intangible assets related to developed technology, licenses, patents and trademarks, customer
relationships, and assembled technology are amortized using the straight-line method over their estimated useful lives of up to twenty years. Amortization of in-process technology related to Fluid Medicals imaging technology program which is
still in prototype phase, pursuant to ASC 805, will not commence until the technology reaches market feasibility. Upon a decision by management to abandon an in-process technology project, the related intangible assets are charged to expense.

ASC 350 requires that goodwill and certain intangible assets be assessed for impairment on an annual basis, or more
frequently if indicators of impairment exist, using fair value measurement techniques. We test for potential impairment of goodwill annually, on October 1. The goodwill impairment test compares the implied fair value of the reporting
units goodwill with the carrying amount of that goodwill to measure the amount of the impairment loss, if any. The implied fair value of goodwill is determined in the same manner as in a business combination. Determining the fair value of the
implied goodwill is judgmental in nature and often involves the use of significant estimates and assumptions. These estimates and assumptions could have a significant impact on whether or not an impairment charge is recognized and also the magnitude
of any such charge. Acquisitions which cause us to recognize goodwill and other intangible assets require us to make determinations that involve estimates and judgments about the value and recoverability of those assets.

Impairment or Disposal of Long-Lived Assets

Impairment of long-lived assets is recognized when events or circumstances indicate that the carrying amount of the asset, or related groups of assets, may not be recoverable. Under FASB ASC Topic 360,
Property, Plant, and Equipment, a long-lived asset is initially measured at the lower of its carrying amount or fair value. An impairment loss is recognized when estimated future cash flows, on an undiscounted basis, expected to result from
the use of the asset, including its disposition, are less than the carrying value of the asset. The impairment loss is then calculated by comparing the carrying value of the asset with its fair value, which is usually estimated using discounted cash
flows expected to be generated from the use of the assets.

Product Warranty Costs

We typically offer a one-year warranty for parts and labor on our products commencing upon the transfer of title and risk of loss to the
customer. We accrue the estimated cost of product warranties when we invoice our customers, based on historical results. The warranty obligation is affected by product failure rates, material usage and service delivery costs incurred in correcting a
product failure. Should actual product failure rates, material usage or service delivery costs differ from these estimates, revisions to the estimated warranty liability would be required. We periodically assess the adequacy of our recorded warranty
liabilities and adjust the amounts as necessary.



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Revenue Recognition

We recognize revenues when persuasive evidence of an arrangement exists, delivery has occurred or services have been rendered, the price is fixed or determinable and collectability is reasonably assured.
Revenue from the sale of our products is generally recognized when title and risk of loss transfer to the customer.

We
occasionally enter into agreements requiring cash payments to partners who are also customers. We apply the provisions of FASB ASC Topic 605-50, Customer Payments and Incentives, to account for cash payments made under these
agreements. During the years ended December 31, 2010, 2009 and 2008, we made payments to customers of approximately $299,389, $382,000 and $450,000, respectively. During the years ended December 31, 2010, 2009 and 2008, $316,056, $459,000
and $269,000, respectively, have been recorded as a reduction in revenues.

Installation and training are generally not
required elements of our sales transactions as most of our products do not require these services. In instances where installation and training are required elements of the sales transaction, revenue is recognized upon completion.

We prospectively adopted ASU 2009-13 and ASU 2009-14 on January 1, 2010. We have applied ASU 2009-13 to our revenue arrangements
containing multiple deliverables that were entered into or significantly modified on or after January 1, 2010. These deliverables can consist of consoles, options for the console, single-procedure disposable products, service and maintenance
agreements, biomedical equipment education and exchange rights for alternative platforms of our product functionality. As a result of adopting ASU 2009-13, we have identified additional separate units of accounting related to options for our
consoles, biomedical equipment education and exchange rights for alternative platforms of our product functionality. We allocate arrangement consideration based on the relative selling prices of the separate units of accounting contained within an
arrangement containing multiple deliverables. Selling prices are determined using fair value, when available, or our estimate of selling price when fair value is not available for a given unit of accounting. Significant inputs in our estimates of
the selling price of separate units of accounting include market and pricing trends, a customers geographic location and the expected gross margins by product line. Prior to the adoption of ASU 2009-13, we used the residual method to allocate
the arrangement consideration when we had not established fair value of delivered items and deferred all arrangement consideration when fair value was not available for undelivered items. Typically, we recognize revenue for each unit of accounting
upon delivery of the item and complete all obligations under an arrangement with multiple deliverables within one year.

The
adoption of ASU 2009-13 did not have a material impact on our consolidated financial position or results of operations as of and for the year ended December 31, 2010. For example, as a result of adopting ASU 2009-13, we recognized additional
revenues in the year ended December 31, 2010 of $1.1 million. Had we adopted ASU 2009-13 on January 1, 2009, we would have recognized additional revenues in the year ended December 31, 2009 of $652,000. The impact on net income
(loss) or earnings (loss) per share would not have been material for any period presented.

The adoption of ASU 2009-14 did
not impact our consolidated financial position or results of operations.

All costs associated with the provision of service
are recognized in cost of revenues as incurred. Amounts billed in excess of revenue recognized are included as deferred revenue in the consolidated balance sheets.

We sell our products through direct sales representatives in the U.S. and a combination of direct sales representatives and independent distributors in international markets. Sales to distributors are
recorded when title and risk of loss transfer upon shipment (generally FOB shipping point). No direct sales customers or distributors have price protection. One distributor has limited return rights in the event of termination or expiration of the
agreement with that distributor. We recognize revenue related to sales to this distributor only to the extent it exceeds revenues for purchases that could potentially be returned under the terms of the agreement. For all other customers, estimated
returns, which are historically nominal, are recorded as an allowance for sales return and as a reduction in revenues.



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Shipping and Handling Costs

Shipping and handling costs billed to customers are included in revenues. Shipping and handling costs we incur associated with shipping
products to our customers are included in cost of revenues.

Research and Development

Company-sponsored research and development expenses include the costs of technical activities that are useful in developing new products,
services, processes or techniques, as well as expenses for technical activities that may significantly improve existing products or processes and are expensed as incurred.

Clinical Studies

We recognize research and development costs for
activities associated with clinical studies performed by third parties as incurred. All other costs relative to setting up clinical study sites are recognized as research and development expense as incurred. Clinical study site costs related to
patient enrollment are accrued as patients are entered into the studies. Equipment that has alternative future use and is used at clinical study sites for participation in the studies is capitalized and expensed over the estimated life of the
equipment.

Income Taxes

We use the asset and liability method of accounting for income taxes. Deferred tax assets and liabilities are recognized for the estimated future tax consequences attributable to differences between the
financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those
temporary differences are expected to be recovered or settled. To the extent a deferred tax asset cannot be recognized under the preceding criteria, allowances are established. At December 31, 2010 and 2009, within the U.S. and selected
international jurisdictions, all deferred tax assets, without offsetting liabilities in the same jurisdiction, were fully offset by a valuation allowance.

FASB ASC Topic 740, Income Taxes (ASC 740), clarifies the accounting for uncertainty in income taxes recognized in the financial statements. ASC 740 provides that a tax benefit from an
uncertain tax position may be recognized when it is more likely than not that the position will be sustained upon examination, including resolutions of any related appeals or litigation processes, based on the technical merits of the position.
Income tax positions must meet a more-likely-than-not recognition threshold to be recognized. ASC 740 also provides guidance on measurement, derecognition, classification, interest and penalties, accounting in interim periods, disclosure and
transition.

We accrue interest and penalties on underpayment of income taxes related to unrecognized tax benefits as a
component of income tax expense in our consolidated statements of operations. The amounts recognized for interest and penalties during the years ended December 31, 2010, 2009 and 2008 were $25,000, $23,000, and $10,000, respectively.

Net Income (Loss) Per Share

Basic and diluted net income (loss) per share is presented in accordance with FASB ASC Topic 260, Earnings per Share. Basic net income (loss) per share is computed by dividing consolidated net
income (loss) by the weighted-average number of common shares outstanding during the period. Diluted net income (loss) per share is computed by dividing consolidated net income (loss) by the weighted-average number of common shares outstanding and
dilutive common stock equivalent shares outstanding during the period. Our potentially dilutive shares include outstanding common stock options, restricted stock units, incremental shares issuable upon the conversion of the 2.875% Convertible Senior
Notes due 2015 (the Notes) or exercise of the warrants relating to the Notes (See Note 3 Financial Statement Details  Convertible Debt). Such potentially dilutive shares are



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excluded when the effect would be to reduce net loss per share or increase net income per share or as discussed in the following paragraph. For the year ended December 31, 2010, 2009 and
2008, potentially dilutive shares totaling 834,000, 3.9 million and 4.4 million, respectively, have not been included in the computation of diluted net income (loss) per share, as the result would be anti-dilutive.

Diluted net income per common share does not include any incremental shares or warrants related to the Notes for the year ended
December 31, 2010. Because the principal amount of the Notes will be settled in cash upon conversion, only the conversion spread relating to the Notes will be included in our calculation of diluted net income per common share. As such, the
Notes will have no impact on diluted net income per common share until the price of our common stock exceeds the conversion price (initially $29.64, subject to adjustments) of the Notes. The warrants will not have an impact on diluted net income per
common share until the price of our common stock exceeds the strike price of the warrants (initially $34.875, subject to adjustments). When the market price of our stock exceeds the conversion price or strike price, as applicable, we will include,
in the diluted net income per common share calculation, the effect of the additional shares that may be issued upon conversion of the Notes or exercise of the warrants using the treasury stock method.

The call options to purchase our common stock, which we purchased to hedge against potential dilution upon conversion of the Notes (see
Note 3 Financial Statement Details  Convertible Debt), are not considered for purposes of calculating the total dilutive weighted average shares outstanding, as their effect would be anti-dilutive. Upon exercise, the call options
will mitigate the dilutive effect of the Notes.

The basic and diluted net income (loss) per common share calculations for the
years ended December 31, 2010, 2009, and 2008 are as follows:



|                                                        |  |                          |        |  |      |   |         |      |  |   |         |  
|------------------------------------------------------- |  | ------------------------ | ------ |  | ---- | - | ------- | ---- |  | - | ------- | -
|                                                        |  | Years Ended December 31, |       
|                                                        |  | 2010                     |        |  | 2009 |   |         | 2008 | 
|Net income (loss)                                       |  | $                        | 5,240  |  |      | $ | (28,954 | )    |  | $ | (13,705 | )
|                                                        |  |                          |        |  |      |   |         |      |  |   |         |  
|Weighted average common shares outstanding for basic    |  |                          | 50,551 |  |      |   | 48,400  |      |  |   | 47,376  |  
|Dilutive potential common stock outstanding:            |  |                          |        |  |      |   |        |      |  |   |        |  
|Stock options                                           |  |                          | 2,325  |  |      |   |        |      |  |   |        |  
|Restricted stock units                                  |  |                          | 391    |  |      |   |        |      |  |   |        |  
|Employee stock purchase plan                            |  |                          | 14     |  |      |   |        |      |  |   |        |  
|                                                        |  |                          |        |  |      |   |         |      |  |   |         |  
|Weighted average common shares outstanding for dilutive |  |                          | 53,281 |  |      |   | 48,400  |      |  |   | 47,376  |  
|                                                        |  |                          |        |  |      |   |         |      |  |   |         |  
|Net income (loss) per share:                            |  |                          |        |  |      |   |         |      |  |   |         |  
|Basic                                                   |  | $                        | 0.10   |  |      | $ | (0.60   | )    |  |   | (0.29   | )
|                                                        |  |                          |        |  |      |   |         |      |  |   |         |  
|Diluted                                                 |  | $                        | 0.10   |  |      | $ | (0.60   | )    |  |   | (0.29   | )
|                                                        |  |                          |        |  |      |   |         |      |  |   |         |  

Stock-Based Compensation

We account for stock-based compensation under the provisions of FASB ASC Topic 718, CompensationStock Compensation(ASC 718), which requires the measurement and recognition of
compensation expense for all stock-based awards made to employees and directors based on estimated fair values on the grant date. We adopted ASC 718 on January 1, 2006 using the modified prospective method. We estimate the fair value of
stock-based awards on the date of grant using the Black-Scholes-Merton option pricing model (Black-Scholes model). The value of the portion of the award that is ultimately expected to vest is recognized as expense over the requisite
service periods using the straight-line method. We estimate forfeitures at the time of grant and revise our estimate in subsequent periods if actual forfeitures differ from those estimates. See Note 5 Stockholders Equity for a
complete discussion of our equity compensation programs and the fair value assumptions used to determine our stock-based compensation expense.



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We account for stock-based compensation awards and warrants granted to non-employees in
accordance with FASB ASC Topic 505-50, Equity-Based Payments to Non-Employees (ASC 505-50). Under ASC 505-50, we determine the fair value of the warrants or stock-based compensation awards granted as either the fair value of the
consideration received or the fair value of the equity instruments issued, whichever is more reliably measurable. If the fair value of equity instruments issued is used, it is measured using the stock price and other measurement assumptions as of
the earlier of either (1) the date at which commitment for performance by the counterparty to earn the equity instruments is reached, or (2) the date at which the counterpartys performance is complete.

Comprehensive Income (Loss)

Comprehensive income (loss) represents the net income (loss) for the period plus the results of certain changes to stockholders equity that are not reflected in the consolidated statements of
operations. Our comprehensive income (loss) consists of net income (losses), unrealized net gains and losses on investments and foreign currency translation adjustments.

Recent Accounting Pronouncements

In February 2010, the FASB issued
ASU No. 2010-09, Subsequent Events (Topic 855) which updates the guidance in ASC Topic 855, Subsequent Events, to no longer require companies that file with the SEC to indicate the date through which they have analyzed subsequent
events. This updated guidance became effective immediately upon issuance.

In December 2010, the FASB issued ASUpdate
No. 2010-28, IntangiblesGoodwill and Other (Topic 350):When to Perform Step 2 of the Goodwill Impairment Test for Reporting Units with Zero or Negative Carrying Amounts (ASU 2010-28). ASU 2010-28 modifies Step 1 of the goodwill
impairment test so that for those reporting units with zero or negative carrying amounts, an entity is required to perform Step 2 of the goodwill impairment test if it is more likely than not based on an assessment of qualitative indicators that
goodwill impairment exists. In determining whether it is more likely than not that goodwill impairment exists, an entity should consider whether there are any adverse qualitative factors indicating that impairment may exist. ASU 2010-28 is effective
for fiscal years, and interim periods within those years, beginning after December 15, 2010. Early adoption is not permitted. We do not expect adoption of this standard to have a material impact on our consolidated results of operations and
financial condition.

2. Acquisitions

CardioSpectra Acquisition

On December 18, 2007, we acquired
all of the outstanding equity interests in CardioSpectra, Inc. (CardioSpectra), a privately-held corporation for an aggregate purchase price of $27.0 million. The acquisition of CardioSpectras OCT technology is expected to
complement our existing product offerings and further enhance our position as an imaging technology leader in the field of interventional medicine. The acquisition was accounted for as an asset purchase. We have included the operating results
associated with the CardioSpectra acquisition in our consolidated financial statements from the date of acquisition.

Subject
to the terms of the Merger Agreement, total potential milestone payments of up to $38.0 million were agreed to as follows:



| |  |  | $11.0 million of the milestone payments to be paid upon approval by applicable U.S., Japanese or European regulators of a first generation OCT
system on or before December 31, 2009;
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | $10.0 million of the milestone payments to be paid upon applicable U.S. regulatory approval of a productized version of the first generation OCT
system on or before December 31, 2010;
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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| |  |  | $10.0 million of the milestone payments to be paid upon cumulative cash sales totaling $10.0 million from commercial sales of OCT products, so
long as such cumulative cash sales are attained prior to the date that is three years after the date on which the applicable U.S. regulatory approval described in the second bullet point above was obtained (if such approval was obtained on or
before December 31, 2010) or otherwise on or before December 31, 2013; and
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | $7.0 million of the milestone payments to be paid upon cumulative cash sales totaling $25.0 million from commercial sales of OCT products, so long
as such cumulative cash sales are attained prior to the date that is four years after the date on which the applicable U.S. regulatory approval described in the second bullet point above was obtained (if such approval was obtained on or before
December 31, 2010) or otherwise on or before December 31, 2014.
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

The milestone payments are
payable, at our sole discretion, in cash, shares of our common stock, or a combination of both and will be accounted for if and when the milestone payments become payable. We have used and will continue to use commercially reasonable efforts to
cause the milestones to occur. However, if we reasonably determine that a technical failure or commercial failure has occurred with respect to all or a part of the OCT program, we may, at our sole discretion, terminate all or part of the OCT
cardiovascular program.

In December 2009, the first milestone specified in the Merger Agreement was achieved and at
December 31, 2009, the milestone payment totaling $11.0 million was recorded in accrued expenses and other current liabilities ($10.5 million) and in accounts payable ($531,000). In January 2010, we paid the milestone payment with the issuance
of 609,360 shares our common stock and $531,000 of cash. The second milestone specified in the Merger Agreement was not achieved as of December 31, 2010, and as such, the second milestone payment will not be paid. Additional remaining milestone
payments of up to $17.0 million may be paid upon achievement of the respective revenue targets described in the merger agreement.

In connection with this acquisition, we recorded $0, $11.0 million, and $175,000 of in-process research and development (IPR&D) expense in the years ended December 31, 2010, 2009 and
2008, respectively.

At the closing of the merger, $2.5 million of the aggregate merger consideration was contributed to
an escrow fund which was available for 12 months to indemnify us and related indemnitees for certain matters, including breaches of representations and warranties and covenants included in the merger agreement. In December 2008, we made a claim
to the escrow in the amount of $118,000 for the reimbursement of excess indebtedness and the remaining escrow funds were released. We have the right to withhold and deduct amounts for any future indemnification claims from milestone payments
otherwise payable by us. No amounts were withheld from the payment of the first milestone for indemnification claims.

Novelis
Acquisition

On May 15, 2008, we acquired all of the outstanding equity interests in Novelis, Inc.
(Novelis), a privately-held company, which developed proprietary ultrasonic visualization and therapy technology for minimally invasive diagnostic and therapeutic devices. The core product line of Novelis is based on FL.IVUS technology.
The aggregate purchase price of $12.3 million was paid in cash and included transaction costs of $204,000. The acquisition was accounted for as an asset purchase. We have included the operating results associated with the Novelis acquisition in our
consolidated financial statements from the date of acquisition.



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The purchase price allocation as of the acquisition date is summarized as follows (in
thousands):



|                                        |  |             |        | 
|--------------------------------------- |  | ----------- | ------ | 
|                                        |  | May 15,2008 |       
|Current Assets:                         |  |             |        | 
|Equipment                               |  | $           | 100    | 
|In-process research and development (1) |  |             | 12,232 | 
|                                        |  |             |        | 
|Total assets acquired                   |  | $           | 12,332 | 
|                                        |  |             |        | 
|Total liabilities assumed               |  |             |       | 
|                                        |  |             |        | 
|Net assets acquired                     |  | $           | 12,332 | 
|                                        |  |             |        | 



|(1) | The in-process research and development was charged to expense in our consolidated statement of operations in the year ended December 31, 2008.
|--- | -----------------------------------------------------------------------------------------------------------------------------------------------

Of the $12.3 million aggregate purchase price paid, $1.8 million was contributed to an escrow fund
and was available for 12 months from the date of the acquisition to indemnify us and related indemnities for certain matters, including breaches of representations and warranties and covenants included in the merger agreement. The escrow fund was
released in May 2009. In addition, we have the right to withhold and deduct up to $450,000 for any indemnification claims from the milestone payment otherwise payable by us.

Under the terms of the merger agreement, a milestone payment of $3.0 million was eligible to be earned by the Novelis stockholders upon receipt of FDA approval of a 510(k) application relating to the
Novelis FL.IVUS device, but only in the event that the 510(k) application for such a device was filed with the FDA on or before December 31, 2009. At December 31, 2009 a 510(k) application had been made to the FDA. At that time,
we believed that the 510(k) application would be approved and that the milestone would become payable. Accordingly, at December 31, 2009 we recorded an accrual for $3.0 million in relation to the potential milestone payment. Based on our
internal assessments in relation to our ongoing interactions with the FDA regarding this 510(k) application, during the fourth quarter of 2010 it became apparent that our 510(k) application would not be approved prior to its
expiration. Accordingly, we reversed the accrual for the milestone payment, resulting in a $3.0 million credit to IPR&D expense during the quarter.

Axsun Acquisition

On December 24, 2008, we acquired all of the
outstanding equity interests in Axsun, a privately-held company that develops and manufactures optical monitors for the telecommunications industry, laser and non-laser light sources and optical engines used in OCT imaging systems and advanced
photonic components and subsystems used in spectroscopy and other industrial applications. The aggregate purchase price of $23.8 million consisted of $22.3 million paid in cash, assumed liabilities of $6.5 million, and transaction costs of $725,000,
net of cash received of $5.8 million. The acquisition was accounted for as a business combination. Correspondingly, the purchase price was allocated to the net tangible and intangible assets based on their estimated fair values as of the acquisition
date. Goodwill was recorded for the amount by which total purchase consideration exceeded net assets acquired. We have included the operating results associated with the Axsun acquisition in our consolidated financial statements from the date of
acquisition.

The intangible assets consist of developed technology in the amount of approximately $8.1 million and customer
relationships in amount of $799,000. The amount assigned to the developed technology was assigned based on the estimated net discounted cash flows from the related product lines on the date of acquisition. The developed technology is being amortized
on a straight-line basis over a weighted-average useful life of 8.9 years. The customer relationships are being amortized on a straight-line basis over a useful life of seven years. The weighted average amortization period of the identified
intangible assets is approximately 8.7 years.



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The purchase price in excess of the fair value of net tangible and intangible assets
acquired resulted in $842,000 recorded to goodwill at December 31, 2008. Goodwill is allocated entirely to our medical segment. The goodwill is not deductible for income tax purposes and will be assessed annually for impairment. We recorded an
additional $89,000 of transaction costs and other liabilities to goodwill, net of an adjustment to acquired inventories, during the year ended December 31, 2009.

We assumed a liability of $563,000 for costs to exit a facility lease and related costs. The lease expired in September 2010. Plans to exit the facility had been consummated prior to the acquisition date.
As of December 31, 2010, 2009 and 2008, $0, $354,000 and $560,000 related to these exit costs remained accrued in our consolidated balance sheets, respectively.

Of the $22.3 million cash consideration, two escrows totaling $2.4 million were established to indemnify us and related indemnitees for certain matters, including breaches of representations and
warranties and covenants included in the merger agreement for 15 months following the closing. In April 2010 we filed a claim against this escrow in relation to the LightLab Imaging, Inc. (LightLab) litigation. (See Note 4
Commitments and Other Contractual Obligations  Litigation for additional background.) On July 16, 2010 an agreement was executed between us the Axsun under which $1.7 million of the non-appraisal rights escrow fund was
released to us which we recorded as a reduction to legal expenses.

Fluid Medical Acquisition

On August 5, 2010, we acquired all of the outstanding equity interests in Fluid Medical, a privately-held company, which is engaged
in the development of imaging technology for use in various structural heart applications, including, but not limited to, mitral valve repair. Fluid Medicals technology and intellectual property provide forward field of view imaging on highly
maneuverable catheters that have the potential to enable or enhance visualization for procedures currently done with inadequate imaging. This technology is expected to result in a Forward-Looking Intra-Cardiac Echo (FL.ICE) catheter that will
initially be focused on minimally invasive structural heart applications, such as percutaneous aortic and mitral valve therapies. As we expand our line of visualization tools used in performing PCIs we believe this technology will enhance our
ability to provide a broad suite of visualization products to our customers.

The purchase price of $4.2 million consists of
$3.6 million in cash payments and $150,000 of debt forgiveness related to working capital loans we made to Fluid Medical prior to the acquisition. Additionally, we have retained $400,000 as a hold-back liability to satisfy any claims for
indemnification made within 18 months following the closing. Assets acquired primarily included $4.1 million of in-process research and development (IPR&D), $117,000 of fixed assets, and $46,000 of cash. We also assumed a liability
of $22,000 of accrued vacation. Additionally, we recorded a deferred tax liability of $1.6 million related to the difference between the book and tax basis of the acquired assets. The transaction was accounted for as a business combination and, as
such we recorded $1.6 million of goodwill reflecting the amount by which the purchase consideration exceeded the acquired net assets. This goodwill was allocated to our medical segment and is not deductible for income tax purposes. We recorded
$184,000 of acquisition-related costs related to this transaction, which were recognized in our statement of operations for the year ended December 31, 2010 as selling, general and administrative expense.



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The purchase price allocation as of the acquisition date is summarized as follows (in
thousands):



|                                    |  |               |        |  
|----------------------------------- |  | ------------- | ------ | -
|                                    |  | August 5,2010 |       
|Current assets:                     |  |               |        |  
|Cash and cash equivalents           |  | $             | 46     |  
|Property and equipment              |  |               | 117    |  
|In-process research and development |  |               | 4,050  |  
|                                    |  |               |        |  
|Total assets acquired               |  |               | 4,213  |  
|Current liabilities:                |  |               |        |  
|Accrued compensation                |  |               | (22    | )
|Other long-term liabilities         |  |               | (1,556 | )
|                                    |  |               |        |  
|Total liabilities acquired          |  |               | (1,578 | )
|                                    |  |               |        |  
|Net assets acquired                 |  | $             | 2,635  |  
|                                    |  |               |        |  

The IPR&D asset we recorded represents an estimate of the fair value of in-process technology related to
Fluid Medicals imaging technology program, which is still in the prototype phase. As such, pursuant to ASC 805, amortization of the IPR&D will not occur until it reaches market feasibility. Costs incurred in connection with this
project subsequent to the date of acquisition will be expensed as incurred. In the event the project is abandoned, we will record an impairment charge for this amount.

As mentioned above, we test goodwill and our other intangible assets, including IPR&D, for impairment annually on October 1. During the twelve months ended September 30, 2010 and through the
date of this report, there were no triggering events, changes in market conditions or other factors that would indicate possible or actual impairment of capitalized IPR&D.

3. Financial Statement Details

Cash and Cash Equivalents and Available-for-Sale
Investments

We invest our excess funds in securities issued by the U.S. government, corporations, banks,
municipalities, financial holding companies and in money market funds comprised of these same types of securities. Our cash and cash equivalents and investments are placed with high credit quality financial institutions. Additionally, we diversify
our investment portfolio in order to maintain safety and liquidity and we do not hold mortgage-backed securities. As of December 31, 2010, all of our investments will mature within eighteen months. These investments are recorded at their
estimated fair value with unrealized gains or losses reported as a separate component of accumulated other comprehensive loss.

Our investments have been classified as available-for-sale investments. At December 31, 2010, available-for-sale investments are
detailed as follows (in thousands):



|                                          |  |               |         |  |                       |   |    |                        |  |   |                     |  |  |   |         | 
|----------------------------------------- |  | ------------- | ------- |  | --------------------- | - | -- | ---------------------- |  | - | ------------------- |  |  | - | ------- | 
|                                          |  | AmortizedCost |         |  | Gross UnrealizedGains |   |    | Gross UnrealizedLosses |  |   | EstimatedFair Value | 
|Corporate debt securities                 |  | $             | 97,685  |  |                       | $ | 41 |                        |  | $ | 14                  |  |  | $ | 97,712  | 
|U.S. Treasury and agency debt securities  |  |               | 77,585  |  |                       |   | 8  |                        |  |   | 22                  |  |  |   | 77,571  | 
|                                          |  |               |         |  |                       |   |    |                        |  |   |                     |  |  |   |         | 
|Short-term available-for-sale investments |  | $             | 175,270 |  |                       | $ | 49 |                        |  | $ | 36                  |  |  | $ | 175,283 | 
|                                          |  |               |         |  |                       |   |    |                        |  |   |                     |  |  |   |         | 
|Corporate debt securities                 |  | $             | 16,830  |  |                       | $ | 1  |                        |  | $ | 29                  |  |  | $ | 16,802  | 
|U.S. Treasury and agency debt securities  |  |               | 10,002  |  |                       |   |   |                        |  |   |                    |  |  |   | 10,002  | 
|                                          |  |               |         |  |                       |   |    |                        |  |   |                     |  |  |   |         | 
|Long-term available for sale investments  |  | $             | 26,832  |  |                       | $ | 1  |                        |  | $ | 29                  |  |  | $ | 26,804  | 
|                                          |  |               |         |  |                       |   |    |                        |  |   |                     |  |  |   |         | 



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Available-for-sale investments that are in an unrealized loss position at December 31,
2010 are detailed as follows (in thousands):



|                                         |  |                     |         |  |                        |   |    | 
|---------------------------------------- |  | ------------------- | ------- |  | ---------------------- | - | -- | 
|                                         |  | EstimatedFair Value |         |  | Gross UnrealizedLosses |  
|Corporate debt securities                |  | $                   | 42,239  |  |                        | $ | 43 | 
|U.S. Treasury and agency debt securities |  |                     | 67,091  |  |                        |   | 22 | 
|                                         |  |                     |         |  |                        |   |    | 
|                                         |  | $                   | 109,330 |  |                        | $ | 65 | 
|                                         |  |                     |         |  |                        |   |    | 

At December 31, 2010, fourteen of our corporate debt securities and ten of our U.S. Treasury and agency
debt securities are in an unrealized loss position caused by interest rate increases. We fully expect to receive par value with full principal and interest when these securities mature. These investments have been in an unrealized loss position for
less than 12 months. We do not intend to sell the investments and we will not be required to sell the investments before maturity. Because of the foregoing considerations, we do not consider these investments to be other-than-temporarily impaired at
December 31, 2010.

At December 31, 2009, available-for-sale investments are detailed as follows (in thousands):



|                                         |  |               |        |  |                       |   |    |                        |  |   |                     |  |  |   |        | 
|---------------------------------------- |  | ------------- | ------ |  | --------------------- | - | -- | ---------------------- |  | - | ------------------- |  |  | - | ------ | 
|                                         |  | AmortizedCost |        |  | Gross UnrealizedGains |   |    | Gross UnrealizedLosses |  |   | EstimatedFair Value | 
|Corporate debt securities                |  | $             | 37,704 |  |                       | $ | 9  |                        |  | $ | 6                   |  |  | $ | 37,707 | 
|U.S. Treasury and agency debt securities |  |               | 28,330 |  |                       |   | 16 |                        |  |   | 25                  |  |  |   | 28,321 | 
|                                         |  |               |        |  |                       |   |    |                        |  |   |                     |  |  |   |        | 
|                                         |  | $             | 66,034 |  |                       | $ | 25 |                        |  | $ | 31                  |  |  | $ | 66,028 | 
|                                         |  |               |        |  |                       |   |    |                        |  |   |                     |  |  |   |        | 

Derivative Financial Instruments

Our derivative financial instruments include foreign exchange forward contracts. We record derivative financial instruments as either assets or liabilities in our consolidated balance sheets and measure
them at fair value. At December 31, 2010, the notional amount of our outstanding contracts was $54.0 million, which included the notional equivalent of $40.4 million in yen and $13.6 million in euro. At December 31, 2010, our
outstanding derivatives had maturities of 90 days or less. The fair value of our foreign exchange forward contracts of $299,000 was included in accrued expenses and other current liabilities in our consolidated balance sheet at December 31,
2010. For the year ended December 31, 2010 and 2009, $3.2 million of losses and $715,000 of gains, respectively, related to our derivative financial instruments are included in exchange rate (loss) gain in our consolidated statements of
operations. Our use of foreign exchange forward contracts commenced in October 2009, therefore no such gains or losses were recorded in any other period presented.

In connection with our convertible debt offering (discussed in more detail below) we purchased call options on our common stock from JPMorgan Chase. The call options give us the right to purchase up to
approximately 3.9 million shares of our common stock at $29.64 per share subject to certain adjustments that generally correspond to the adjustments to the conversion rate for the underlying debt. Additionally, we sold warrants to JPMorgan
Chase, which give JPMorgan Chase the right to purchase up to approximately 3.9 million shares of our common stock at $34.875 per share, subject to certain adjustments. In accordance with the authoritative guidance, we concluded that the call
options and warrants were indexed to our stock. Therefore, the call options and warrants were classified as equity instruments and are not being marked to market prospectively.



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Fair Value Measurements

ASC 820 defines fair value as an exit price that would be received from the sale of an asset or paid to transfer a liability in the
principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. ASC 820 establishes a three-level hierarchy for disclosure that is based on the extent and level of
judgment used to estimate the fair value of assets and liabilities.



| |  |  | Level 1Valuations based on quoted prices for identical assets or liabilities in active markets at the measurement date. Since valuations are
based on quoted prices that are readily and regularly available in an active market, valuation of these products does not entail a significant degree of judgment. Our Level 1 assets consist of money market funds and U.S. Treasury and agency debt
securities.
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Level 2Valuations based on quoted prices for similar assets and liabilities in active markets; quoted prices for identical or similar assets and
liabilities in markets that are not active; or other inputs that are observable or can be corroborated by observable market data, such as alternative pricing sources with reasonable levels of price transparency. Our Level 2 assets consist of
corporate debt securities including commercial paper, corporate bonds, certificates of deposit and foreign exchange forward contracts.
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Level 3Valuations based on inputs that are unobservable and significant to the overall fair value measurement. We have not measured the fair
value of any of our assets on a recurring basis using Level 3 inputs.
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

We utilize a third-party pricing
service to assist us in obtaining fair value pricing for our investments. Pricing for these securities is based on proprietary models. Inputs are documented in accordance with the fair value disclosure hierarchy.

We utilize a third-party broker to assist us in obtaining fair value pricing for our foreign exchange forward contracts and have
classified these financial instruments as Level 2.

During the years ended December 31, 2010 and 2009, no transfers were
made into or out of the Level 3 categories. We will continue to review our fair value inputs on a quarterly basis.

The fair
value of our financial assets subject to the disclosure requirements of ASC 820 was determined using the following levels of inputs at December 31, 2010 and 2009 (in thousands):



|                                         |  |                                              |         |  |         |   |         |         |  |   |         |  |  |   |   | 
|---------------------------------------- |  | -------------------------------------------- | ------- |  | ------- | - | ------- | ------- |  | - | ------- |  |  | - | - | 
|                                         |  | Fair Value Measurements at December 31, 2010 |        
|                                         |  | Total                                        |         |  | Level 1 |   |         | Level 2 |  |   | Level 3 | 
|Assets:                                  |  |                                              |         |  |         |   |         |         |  |   |         |  |  |   |   | 
|Current:                                 |  |                                              |         |  |         |   |         |         |  |   |         |  |  |   |   | 
|Cash                                     |  | $                                            | 23,381  |  |         | $ | 23,381  |         |  | $ |        |  |  | $ |  | 
|Money market funds                       |  |                                              | 20,048  |  |         |   | 20,048  |         |  |   |        |  |  |   |  | 
|                                         |  |                                              |         |  |         |   |         |         |  |   |         |  |  |   |   | 
|Sub-total cash and cash equivalents      |  |                                              | 43,429  |  |         |   | 43,429  |         |  |   |        |  |  |   |  | 
|                                         |  |                                              |         |  |         |   |         |         |  |   |         |  |  |   |   | 
|Corporate debt securities                |  |                                              | 97,712  |  |         |   |        |         |  |   | 97,712  |  |  |   |  | 
|U.S. Treasury and agency debt securities |  |                                              | 77,571  |  |         |   | 77,571  |         |  |   |        |  |  |   |  | 
|                                         |  |                                              |         |  |         |   |         |         |  |   |         |  |  |   |   | 
|Sub-total short-term investments         |  |                                              | 175,283 |  |         |   | 77,571  |         |  |   | 97,712  |  |  |   |  | 
|                                         |  |                                              |         |  |         |   |         |         |  |   |         |  |  |   |   | 
|Long Term:                               |  |                                              |         |  |         |   |         |         |  |   |         |  |  |   |   | 
|Corporate debt securities                |  |                                              | 16,802  |  |         |   |        |         |  |   | 16,802  |  |  |   |  | 
|U.S. Treasury and agency debt securities |  |                                              | 10,002  |  |         |   | 10,002  |         |  |   |        |  |  |   |  | 
|                                         |  |                                              |         |  |         |   |         |         |  |   |         |  |  |   |   | 
|Sub-total long-term assets               |  |                                              | 26,804  |  |         |   | 10,002  |         |  |   | 16,802  |  |  |   |  | 
|                                         |  |                                              |         |  |         |   |         |         |  |   |         |  |  |   |   | 
|Total Assets                             |  | $                                            | 245,516 |  |         | $ | 131,002 |         |  | $ | 114,514 |  |  | $ |  | 
|                                         |  |                                              |         |  |         |   |         |         |  |   |         |  |  |   |   | 
|Liabilities:                             |  |                                              |         |  |         |   |         |         |  |   |         |  |  |   |   | 
|Foreign exchange forward contracts       |  | $                                            | 299     |  |         |   |        |         |  | $ | 299     |  |  |   |  | 
|                                         |  |                                              |         |  |         |   |         |         |  |   |         |  |  |   |   | 



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|                                         |  |                                              |         |  |         |   |        |         |  |   |         |  |  |   |   | 
|---------------------------------------- |  | -------------------------------------------- | ------- |  | ------- | - | ------ | ------- |  | - | ------- |  |  | - | - | 
|                                         |  | Fair Value Measurements at December 31, 2009 |        
|                                         |  | Total                                        |         |  | Level 1 |   |        | Level 2 |  |   | Level 3 | 
|Assets:                                  |  |                                              |         |  |         |   |        |         |  |   |         |  |  |   |   | 
|Cash                                     |  | $                                            | 11,255  |  |         | $ | 11,255 |         |  | $ |        |  |  | $ |  | 
|Money market funds                       |  |                                              | 44,800  |  |         |   | 44,800 |         |  |   |        |  |  |   |  | 
|                                         |  |                                              |         |  |         |   |        |         |  |   |         |  |  |   |   | 
|Sub-total cash and cash equivalents      |  |                                              | 56,055  |  |         |   | 56,055 |         |  |   |        |  |  |   |  | 
|                                         |  |                                              |         |  |         |   |        |         |  |   |         |  |  |   |   | 
|Corporate debt securities                |  |                                              | 37,707  |  |         |   |       |         |  |   | 37,707  |  |  |   |  | 
|U.S. Treasury and agency debt securities |  |                                              | 28,321  |  |         |   | 28,321 |         |  |   |        |  |  |   |  | 
|                                         |  |                                              |         |  |         |   |        |         |  |   |         |  |  |   |   | 
|Sub-total short-term investments         |  |                                              | 66,028  |  |         |   | 28,321 |         |  |   | 37,707  |  |  |   |  | 
|Foreign exchange forward contracts       |  |                                              | 190     |  |         |   |       |         |  |   | 190     |  |  |   |  | 
|                                         |  |                                              |         |  |         |   |        |         |  |   |         |  |  |   |   | 
|Total Assets                             |  | $                                            | 122,273 |  |         | $ | 84,376 |         |  | $ | 37,897  |  |  | $ |  | 
|                                         |  |                                              |         |  |         |   |        |         |  |   |         |  |  |   |   | 

Accounts Receivable, Net

Accounts receivable, net consists of the following (in thousands):



|                                      |  |              |        |  |      |   |        | 
|------------------------------------- |  | ------------ | ------ |  | ---- | - | ------ | 
|                                      |  | December 31, |       
|                                      |  | 2010         |        |  | 2009 |  
|Trade accounts receivable             |  | $            | 59,162 |  |      | $ | 51,478 | 
|Less: allowance for doubtful accounts |  |              | 29     |  |      |   | 307    | 
|                                      |  |              |        |  |      |   |        | 
|                                      |  | $            | 59,133 |  |      | $ | 51,171 | 
|                                      |  |              |        |  |      |   |        | 

The change in the allowance for doubtful accounts for the years ended December 31, 2010, 2009 and 2008
is summarized in the following table (in thousands):



|                                                                                   |  |                          |      |   |      |   |     |      |  |   |     |  
|---------------------------------------------------------------------------------- |  | ------------------------ | ---- | - | ---- | - | --- | ---- |  | - | --- | -
|                                                                                   |  | Years Ended December 31, |     
|                                                                                   |  | 2010                     |      |   | 2009 |   |     | 2008 | 
|Balance at beginning of year                                                       |  | $                        | 307  |   |      | $ | 354 |      |  | $ | 138 |  
|Additions (recoveries) charged to selling, general and administrative expense, net |  |                          | (12  | ) |      |   | (46 | )    |  |   | 232 |  
|Write-offs                                                                         |  |                          | (246 | ) |      |   | (10 | )    |  |   |    |  
|Foreign currency translation adjustments                                           |  |                          | (20  | ) |      |   | 9   |      |  |   | (16 | )
|                                                                                   |  |                          |      |   |      |   |     |      |  |   |     |  
|Balance at end of year                                                             |  | $                        | 29   |   |      | $ | 307 |      |  | $ | 354 |  
|                                                                                   |  |                          |      |   |      |   |     |      |  |   |     |  

Inventories

Inventories consist of the following (in thousands):



|                   |  |              |        |  |      |   |        | 
|------------------ |  | ------------ | ------ |  | ---- | - | ------ | 
|                   |  | December 31, |       
|                   |  | 2010         |        |  | 2009 |  
|Finished goods (1) |  | $            | 20,996 |  |      | $ | 10,985 | 
|Work-in-process    |  |              | 7,946  |  |      |   | 9,374  | 
|Raw materials      |  |              | 11,557 |  |      |   | 17,351 | 
|                   |  |              |        |  |      |   |        | 
|                   |  | $            | 40,499 |  |      | $ | 37,710 | 
|                   |  |              |        |  |      |   |        | 



|(1) | Finished goods inventory includes consigned inventory of $3.3 million and $2.1 million at December 31, 2010 and 2009, respectively.
|--- | -----------------------------------------------------------------------------------------------------------------------------------



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Property and Equipment

Property and equipment consists of the following (in thousands):



|                                          |  |              |         |   |      |   |         |  
|----------------------------------------- |  | ------------ | ------- | - | ---- | - | ------- | -
|                                          |  | December 31, |        
|                                          |  | 2010         |         |   | 2009 |  
|Medical diagnostic equipment              |  | $            | 55,836  |   |      | $ | 43,234  |  
|Other equipment                           |  |              | 27,721  |   |      |   | 22,757  |  
|Leasehold improvements                    |  |              | 8,062   |   |      |   | 6,352   |  
|Purchased software                        |  |              | 3,331   |   |      |   | 2,970   |  
|Construction-in-progress (1)              |  |              | 7,852   |   |      |   | 1,960   |  
|                                          |  |              |         |   |      |   |         |  
|                                          |  |              | 102,802 |   |      |   | 77,273  |  
|Accumulated depreciation and amortization |  |              | (46,299 | ) |      |   | (32,539 | )
|                                          |  |              |         |   |      |   |         |  
|                                          |  | $            | 56,503  |   |      | $ | 44,734  |  
|                                          |  |              |         |   |      |   |         |  



|(1) | Construction-in-progress includes $42,000 of capitalized interest related to the construction of our manufacturing facility in Costa Rica.
|--- | ------------------------------------------------------------------------------------------------------------------------------------------

Property and equipment includes certain medical diagnostic equipment that is located at customer premises. We retain the ownership of the
equipment and have the right to remove the equipment if it is not being utilized according to expectations. Depreciation expense relating to this equipment of $8.2 million, $4.8 million and $1.7 million is recorded in cost of revenues
during the years ended December 31, 2010, 2009 and 2008, respectively. The net book value of this equipment was $28.6 million and $23.2 million at December 31, 2010 and December 31, 2009, respectively. Also included in medical
diagnostic equipment is property and equipment used for demonstration and evaluation purposes. Depreciation expense for equipment used for demonstration and evaluation purposes recorded in selling, general and administrative expenses totaled $1.5
million, $1.8 million and $1.2 million during the years ended December 31, 2010, 2009 and 2008, respectively. The net book value of this equipment was $1.6 million and $2.4 million at December 31, 2010 and December 31, 2009,
respectively. Medical diagnostic equipment is recorded at our cost to acquire or manufacture the equipment and is depreciated over its estimated useful life (generally three to five years).

Depreciation expense for the years ended December 31, 2010, 2009 and 2008 was $16.0 million, $12.0 million, and $6.0 million,
respectively.

Intangible Assets

Intangible assets consist of developed technology, customer relationships, assembled workforce, licenses, and patents and trademarks, which are amortized using the straight-line method over periods
ranging from three to twenty years, representing the estimated useful lives of the assets.

During the year ended
December 31, 2010, we recorded intangible asset additions of $8.1 million primarily consisting of $4.1 million of IPR&D related to the Fluid Medical acquisition (see Note 2 Acquisitions  Fluid Acquisition for additional
background), $2.0 million related to acquisition of developed technology, $1.4 million of customer relationships (see Note 4 Commitments and Other Contractual Obligations), and $429,000 related to internally developed patents and
trademarks.

During the year ended December 31, 2009, we recorded intangible asset additions of $315,000 related to
internally developed patents and trademarks. In addition, we abandoned patents with a net book value of $100,000 in the same period.



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Intangible assets subject to amortization, by major class, consist of the following (in
thousands):



|                                                  |  |                   |        |  |                         |   |        |     |  |   |                                     |  |  |  |      | 
|------------------------------------------------- |  | ----------------- | ------ |  | ----------------------- | - | ------ | --- |  | - | ----------------------------------- |  |  |  | ---- | 
|                                                  |  | December 31, 2010 |       
|Intangible assets subject to amortization         |  | Cost              |        |  | AccumulatedAmortization |   |        | Net |  |   | Weighted-Average Life(in years) (1) | 
|Developed technology                              |  | $                 | 22,651 |  |                         | $ | 14,666 |     |  | $ | 7,985                               |  |  |  | 8.2  | 
|Licenses                                          |  |                   | 7,034  |  |                         |   | 5,400  |     |  |   | 1,634                               |  |  |  | 10.0 | 
|Customer relationships                            |  |                   | 3,978  |  |                         |   | 2,005  |     |  |   | 1,973                               |  |  |  | 3.4  | 
|Patents and trademarks                            |  |                   | 2,655  |  |                         |   | 1,262  |     |  |   | 1,393                               |  |  |  | 7.1  | 
|Assembled workforce                               |  |                   | 274    |  |                         |   | 206    |     |  |   | 68                                  |  |  |  | 4.0  | 
|                                                  |  |                   |        |  |                         |   |        |     |  |   |                                     |  |  |  |      | 
|                                                  |  |                   | 36,592 |  |                         |   | 23,539 |     |  |   | 13,053                              |  |  |  | 7.1  | 
|Intangible assets not yet subject to amortization |  |                   |        |  |                         |   |        |     |  |   |                                     |  |  |  |      | 
|                                                  |  |                   |        | 
|In-process research and development (2)           |  |                   | 4,050  |  |                         |   |       |     |  |   | 4,050                               |  |  |  | n/a  | 
|                                                  |  |                   |        |  |                         |   |        |     |  |   |                                     |  |  |  |      | 
|                                                  |  | $                 | 40,642 |  |                         | $ | 23,539 |     |  | $ | 17,103                              |  |  |  |      | 
|                                                  |  |                   |        |  |                         |   |        |     |  |   |                                     |  |  |  |      | 



|(1) | Weighted average life of intangible assets is presented excluding fully amortized assets.
|--- | -----------------------------------------------------------------------------------------

|(2) | IPR&D represents an estimate of fair value of in-process technology related to Fluid Medicals imaging technology program, which is still in the prototype
phase. As such, pursuant to ASC 805, amortization of the IPR&D will not occur until it reaches market feasibility. In the event the project is abandoned, we will record an impairment charge for this amount.
|--- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|                       |  |                   |        |  |                         |   |        |     |  |   |                                 |  |  |  |      | 
|---------------------- |  | ----------------- | ------ |  | ----------------------- | - | ------ | --- |  | - | ------------------------------- |  |  |  | ---- | 
|                       |  | December 31, 2009 |       
|                       |  | Cost              |        |  | AccumulatedAmortization |   |        | Net |  |   | Weighted-Average Life(in years) | 
|Developed technology   |  | $                 | 20,565 |  |                         | $ | 13,382 |     |  | $ | 7,183                           |  |  |  | 7.3  | 
|Licenses               |  |                   | 7,034  |  |                         |   | 4,747  |     |  |   | 2,287                           |  |  |  | 10.0 | 
|Customer relationships |  |                   | 2,473  |  |                         |   | 1,788  |     |  |   | 685                             |  |  |  | 6.7  | 
|Patents and trademarks |  |                   | 2,231  |  |                         |   | 900    |     |  |   | 1,331                           |  |  |  | 6.9  | 
|Assembled workforce    |  |                   | 274    |  |                         |   | 137    |     |  |   | 137                             |  |  |  | 4.0  | 
|                       |  |                   |        |  |                         |   |        |     |  |   |                                 |  |  |  |      | 
|                       |  | $                 | 32,577 |  |                         | $ | 20,954 |     |  | $ | 11,623                          |  |  |  | 7.6  | 
|                       |  |                   |        |  |                         |   |        |     |  |   |                                 |  |  |  |      | 

We recorded amortization of intangible assets totaling $2.6 million, $4.2 million and $3.1 million
for years ended December 31, 2010, 2009 and 2008, respectively.

At December 31, 2010, future amortization expense
related to our intangible assets subject to amortization is expected to be as follows (in thousands):



|           |  |   |        | 
|---------- |  | - | ------ | 
|2011       |  | $ | 3,495  | 
|2012       |  |   | 2,973  | 
|2013       |  |   | 2,170  | 
|2014       |  |   | 1,499  | 
|2015       |  |   | 1,085  | 
|Thereafter |  |   | 1,831  | 
|           |  |   |        | 
|           |  | $ | 13,053 | 
|           |  |   |        | 



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##### Table of Contents

Goodwill

The change in goodwill for the years ended December 31, 2010 and 2009 is summarized in the following table (in thousands):



|                             |  |                          |       |  |      |   |     | 
|---------------------------- |  | ------------------------ | ----- |  | ---- | - | --- | 
|                             |  | Years Ended December 31, |      
|                             |  | 2010                     |       |  | 2009 |  
|Balance at beginning of year |  | $                        | 931   |  |      | $ | 842 | 
|Additions                    |  |                          | 1,556 |  |      |   | 89  | 
|                             |  |                          |       |  |      |   |     | 
|Balance at end of year       |  | $                        | 2,487 |  |      | $ | 931 | 
|                             |  |                          |       |  |      |   |     | 

Activity in the year ended December 31, 2009 related to goodwill recorded in connection with the Axsun
acquisition, and activity in the year ended December 31, 2010 related to goodwill recorded in connection with the Fluid acquisition.

Accrued Warranty

Accrued warranty liability is included in accrued expenses and other current liabilities in the consolidated balance sheets. The change in
the accrued warranty liability for the years ended December 31, 2010, 2009 and 2008 is summarized in the following table (in thousands):



|                             |  |                          |        |   |      |   |        |      |  |   |        |  
|---------------------------- |  | ------------------------ | ------ | - | ---- | - | ------ | ---- |  | - | ------ | -
|                             |  | Years Ended December 31, |       
|                             |  | 2010                     |        |   | 2009 |   |        | 2008 | 
|Balance at beginning of year |  | $                        | 1,159  |   |      | $ | 1,104  |      |  | $ | 1,129  |  
|Acquired from Axsun          |  |                          |       |   |      |   |       |      |  |   | 167    |  
|Warranties issued            |  |                          | 1,384  |   |      |   | 1,844  |      |  |   | 1,869  |  
|Settlements                  |  |                          | (1,691 | ) |      |   | (1,789 | )    |  |   | (2,061 | )
|                             |  |                          |        |   |      |   |        |      |  |   |        |  
|Balance at end of year       |  | $                        | 852    |   |      | $ | 1,159  |      |  | $ | 1,104  |  
|                             |  |                          |        |   |      |   |        |      |  |   |        |  

Restructuring Activity

In June 2009, we implemented a restructuring plan to consolidate our resources related to the research and development of our OCT technology. As part of the restructuring plan, during the first quarter of
2010 we completed the closure of our San Antonio, Texas facility and relocated such operations to our Billerica, Massachusetts facility. Approximately 20 employees were impacted by the restructuring plan. One-time benefits to affected employees
included relocation or a separation agreement including severance payments, continuing medical benefits, and outplacement assistance. Sixteen employees entered into separation agreements. All terminations were completed as of May 31, 2010.

We have accounted for the restructuring plan in accordance with FASB ASC Topic 420, Exit or Disposal Cost Obligations
(ASC 420). In accordance with ASC 420 we accrued relocation costs and the costs of one-time termination benefits to employees who were not required to render service beyond a minimum retention period of 60 days. The remaining one-time
termination benefits were recorded to expense ratably over required service periods. Additionally, costs related to moving equipment between the facilities were expensed during the period incurred. As a result, we recorded $63,000 as research and
development expense during the year ended December 31, 2010. In addition, during the first quarter of 2010 we recorded $454,000 of additional restructuring costs as selling, general and administrative expense for the termination of the
operating lease and related contract costs, and a charge for the impairment of certain property and equipment.

On
April 26, 2010, we entered into a lease termination agreement with the landlord of our San Antonio facility. Total termination costs of $330,000 included a lump-sum lease-termination payment, broker commissions and the surrender of our security
deposit. We are correspondingly released from any future



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obligations under this facility lease. The termination payment represented a savings over the original estimated restructuring liability related to the remaining lease payments and resulted in a
benefit of $116,000 that was recorded during the second quarter. At December 31, 2010, there were no future obligations remaining in accrued liabilities related to this restructuring activity.

At December 31, 2010, our restructuring liability included in accrued expenses and other current liabilities of our consolidated
balance sheets (in thousands) is detailed as follows:



|                                  |  |            |     |   |                             |   |      |                      |  |   |                           |   |  |       |      |   |  |   |      |  
|--------------------------------- |  | ---------- | --- | - | --------------------------- | - | ---- | -------------------- |  | - | ------------------------- | - |  | ----- | ---- | - |  | - | ---- | -
|                                  |  | Relocation |     |   | One timeterminationbenefits |   |      | Facilitymoving costs |  |   | Operatingleasecommitments |   |  | Total |     
|Beginning balance                 |  | $          |    |   |                             | $ |     |                      |  | $ |                          |   |  | $     |     |   |  | $ |     |  
|Additions                         |  |            | 82  |   |                             |   | 347  |                      |  |   |                          |   |  |       |     |   |  |   | 429  |  
|Cash payments                     |  |            | (26 | ) |                             |   | (248 | )                    |  |   |                          |   |  |       |     |   |  |   | (274 | )
|                                  |  |            |     |   |                             |   |      |                      |  |   |                           |   |  |       |      |   |  |   |      |  
|Liability as of December 31, 2009 |  |            | 56  |   |                             |   | 99   |                      |  |   |                          |   |  |       |     |   |  |   | 155  |  
|Additions                         |  |            |    |   |                             |   | 34   |                      |  |   | 29                        |   |  |       | 446  |   |  |   | 509  |  
|Cash payments                     |  |            | (56 | ) |                             |   | (118 | )                    |  |   | (29                       | ) |  |       | (330 | ) |  |   | (533 | )
|Reversals                         |  |            |    |   |                             |   | (15  | )                    |  |   |                          |   |  |       | (116 | ) |  |   | (131 | )
|                                  |  |            |     |   |                             |   |      |                      |  |   |                           |   |  |       |      |   |  |   |      |  
|Liability as of December 31, 2010 |  | $          |    |   |                             | $ |     |                      |  | $ |                          |   |  | $     |     |   |  | $ |     |  
|                                  |  |            |     |   |                             |   |      |                      |  |   |                           |   |  |       |      |   |  |   |      |  

Capital Lease Obligations

We lease certain equipment under capital lease arrangements. See Note 4 Commitments and Other Contractual Obligations for more information.

Convertible Debt

In September 2010, we issued $115.0 million aggregate principal amount of 2.875% Convertible Senior Notes due September 1,
2015 (the Notes), in an offering registered under the Securities Act of 1933, as amended. Interest is payable semiannually in arrears on March 1 and September 1, commencing on March 1, 2011.

The Notes are general unsecured obligations that rank pari passu with our other existing and future unsecured obligations. Prior to
June 1, 2015, the Notes are convertible only upon certain specified events. The initial conversion rate for the Notes is 33.7339 shares of common stock per $1,000 principal amount of the Notes, representing an initial effective conversion price
of approximately $29.64 per share of common stock. The conversion rate is subject to adjustment for certain events as outlined in the indenture governing the Notes but will not be adjusted for accrued and unpaid interest.

We received proceeds of $100.5 million from issuance of the Notes, net of debt issuance costs ($4.4 million) and net payments related to
our hedge transactions ($10.0 million) which are described in more detail below. We recorded total debt issuance costs (including broker fees) of approximately $4.4 million, which have been allocated on a pro-rata basis to the debt ($3.5 million)
and equity ($866,000) components of the transaction. The debt component is primarily included in non-current liabilities and is being accreted to interest expense over five years, the term of the Notes. The equity component was netted against the
proceeds and included in additional paid-in capital.



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The carrying values of the liability and equity components of the Notes are reflected in our
consolidated balance sheets as follows (in thousands):



|                                                        |  |                  |         |  
|------------------------------------------------------- |  | ---------------- | ------- | -
|                                                        |  | December 31,2010 |        
|Liabilities:                                            |  |                  |         |  
|Principal amount of the 2.875% Convertible Senior Notes |  | $                | 115,000 |  
|Unamortized discount of liability component             |  |                  | (21,211 | )
|Unamortized debt issuance costs                         |  |                  | (2,627  | )
|                                                        |  |                  |         |  
|Carrying value of liability component                   |  | $                | 91,162  |  
|                                                        |  |                  |         |  
|Equity  net carrying value                             |  | $                | 22,263  |  
|                                                        |  |                  |         |  

Interest expense related to the Notes was included in interest expense on the consolidated statements of
operations as follows (in thousands):



|                                    |  |                             |       | 
|----------------------------------- |  | --------------------------- | ----- | 
|                                    |  | Year EndedDecember 31, 2010 |      
|Contractual coupon interest         |  | $                           | 918   | 
|Amortization of debt issuance costs |  |                             | 200   | 
|Accretion of debt discount          |  |                             | 1,052 | 
|                                    |  |                             |       | 
|                                    |  | $                           | 2,170 | 
|                                    |  |                             |       | 

We may not redeem the Notes prior to maturity. However, in the event of a fundamental change, as defined in
the indenture, the holders of the Notes may require us to purchase all or a portion of their Notes at a purchase price equal to 100% of the principal amount of the Notes, plus accrued and unpaid interest, if any, to the repurchase date. Holders, who
convert their Notes in connection with a make-whole fundamental change, as defined in the indenture, may be entitled to a make-whole premium in the form of an increase in the conversion rate.

Prior to June 1, 2015, the Notes are convertible only under the following circumstances: (1) during any fiscal quarter
commencing after December 31, 2010 (and only during such fiscal quarter), if the last reported sale price of our common stock for at least 20 trading days (whether or not consecutive) during the period of 30 consecutive trading days ending on
the last trading day of the immediately preceding fiscal quarter is greater than or equal to 130% of the applicable conversion price on each applicable trading day; (2) during the five business day period after any ten consecutive trading day
period (the Measurement Period) in which, for each trading day of such Measurement Period, the trading price per $1,000 principal amount of notes on such trading day was less than 98% of the product of the last reported sale price of our
common stock on such trading day and the applicable conversion rate on such trading day; or (3) upon the occurrence of specified distributions and corporate events. As of December 31, 2010, the if-converted value of the Notes
did not exceed its principal amount and none of the conditions allowing holders of the Notes to convert had been met. The total fair value of the Notes at December 31, 2010 was $115.6 million.

We determined that the embedded conversion option in the Notes is not required to be separately accounted for as a derivative under ASC
815, Derivatives and Hedging. However, since the Notes are within the scope of ASC 470, Topic 20, Debt with Conversion and Other Options, we are required to separate the Notes into a liability component and equity components. The
carrying amount of the liability component is calculated by measuring the fair value of a similar liability (including any embedded features other than the conversion option) that does not have an associated equity component. The carrying
amount of the equity component representing the embedded conversion option is determined by deducting the fair value of the liability component from the initial proceeds ascribed to the Notes as a whole. The excess of the principal amount of
the liability component over its carrying amount is amortized to interest cost over the expected life of a similar liability that does not



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have an associated equity component using the effective interest method. The equity component is not remeasured as long as it continues to meet the conditions for equity classification in
ASC 815, Topic 40, Contracts in an Entitys Own Equity (ASC 815).

We are using an effective interest
rate of 7.65% to calculate the accretion of the bond discount, which is being recorded as interest expense over the expected remaining term of the Notes. (The amount by which interest expense calculated using the effective interest rate of 7.65%
exceeds the interest expense related to the coupon rate of 2.875%, is non-cash interest expense.) The effective rate is based on the interest rate for a similar instrument that does not have a conversion feature. We may be required to pay additional
interest upon occurrence of certain events as outlined in the indenture governing the Notes. As of December 31, 2010, the remaining term of the Notes is 4.67 years.

Upon conversion of a Note, holders of the Notes will receive up to the principal amount of the converted Note in cash and any excess conversion value (conversion spread) in shares of our common stock. The
amount of cash and the number of shares of our common stock, if any, will be based on a 25 trading day observation period as described in the indenture. As described in Note 1 Organization and Summary of Significant Accounting Policies,
the conversion spread will be included in the denominator for the computation of diluted net income per common share, using the treasury stock method.

As discussed above, to hedge against potential dilution upon conversion of the Notes, we also purchased call options on our common stock from JPMorgan Chase. The call options give us the right to purchase
up to approximately 3.9 million shares of our common stock at $29.64 per share subject to certain adjustments that generally correspond to the adjustments to the conversion rate for the Notes. We paid an aggregate of $27.2 million to
purchase these call options. The call options will expire on September 1, 2015, unless earlier terminated or exercised. To reduce the cost of the hedge, in a separate transaction we sold warrants to JPMorgan Chase. These warrants give JPMorgan
Chase the right to purchase up to approximately 3.9 million shares of our common stock at $34.875 per share, subject to certain adjustments. These warrants will be exercisable and will expire in equal installments for a period of 50 trading
days beginning on December 1, 2015. We received an aggregate of $17.1 million from the sale of these warrants. In accordance with ASC 815, we concluded that the call options and warrants were indexed to our stock. Therefore, the call
options and warrants were classified as equity instruments and will not be marked to market prospectively unless certain conditions as described in the Notes, occur. The net amount of $10.0 million paid to JPMorgan Chase was recorded as a
reduction to additional paid-in capital. We did not record the potential tax benefit of approximately $10.4 million related to the call options as we have recorded a full valuation allowance against our deferred tax assets. The settlement terms of
the call options provide for net share settlement and the settlement terms of the warrants provide for net share or cash settlement at our option.

4. Commitments and Contingencies

LitigationLightLab

On January 7, 2009, LightLab Imaging, Inc. (LightLab) filed a complaint against us and our wholly-owned subsidiary,
Axsun, in the Superior Court of Massachusetts, Suffolk County, seeking injunctive relief and unspecified damages (the Massachusetts Action). LightLab develops and sells OCT products for cardiovascular imaging and other medical uses. On
July 6, 2010, LightLab was acquired by St. Jude Medical, Inc. (St. Jude).

Prior to our acquisition of Axsun,
Axsun had entered into a development and supply agreement (the Agreement) with LightLab, in which, among other things, Axsun agreed to supply tunable lasers to LightLab for use in LightLabs OCT imaging products until April 2016,
with exclusivity in the field of coronary artery imaging expiring in April 2014. Since the acquisition, Axsun has continued to supply lasers to LightLab. The complaint includes allegations that Volcano interfered with the Agreement and with
LightLabs advantageous business relationship with Axsun, that Axsun breached the Agreement, that Axsun and Volcano misappropriated LightLabs confidential information and trade secrets, and violated Chapter 93A, a Massachusetts statute
that provides for recovery of up to three times damages plus attorneys fees (93A).



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The Judge ordered that the trial in the Massachusetts Action proceed in separate phases,
with a jury trial first on liability, followed by a jury trial on damages, and then non-jury hearings on liability under 93A and on injunctive relief. The jury trial on liability commenced on January 4, 2010 and the jury returned a verdict on
February 4, 2010 that included findings that the contract specifications for the lasers Axsun supplies and previously supplied to LightLab are trade secrets of LightLab, that Axsun agreed not to sell any tunable lasers to Volcano for any
purpose or to third parties for use in cardiology imaging during the exclusivity period in the contract, and that Axsun breached its contract with LightLab. The jury further found that Volcano intentionally interfered with LightLabs
advantageous business relationship with Axsun.

A trial in the Massachusetts Action with respect to damages was set to
commence on April 7, 2010 (Damages Trial). In lieu of conducting the Damages Trial, the parties agreed and stipulated that the sum of $200,000 would be treated as if it were the jurys verdict against the defendants in the
Damages Trial (the Stipulation).

Upon the entry of the Stipulation, LightLab waived its rights, if any, to make
any additional claims for special damages relating to lasers received in 2009 that do not meet the version 6 specification, for special damages claimed by LightLab in prior pleadings, and for the repair and/or replacement of any of the lasers
specified in the Stipulation. In addition, Axsun waived its rights, if any, to make any claim for recovery from LightLab certain engineering charges in connection with a development and supply agreement with LightLab, and for return by LightLab of
any of the lasers specified in the Stipulation.

Under the Stipulation, all parties expressly reserved their otherwise
properly preserved rights of appeal. These rights include LightLabs appellate rights, if any, regarding its claim for alleged lost profits in excess of the above-referenced $200,000 stipulated amount to the extent LightLab is able to establish
that it has properly preserved such rights.

The injunctive relief phase of the Massachusetts Action commenced on
April 12, 2010. In a ruling issued October 5, 2010, the Court rejected LightLabs claims for protection of five alleged trade secrets relating to laser technologies, and denied all of LightLabs requests for permanent injunctions
with respect to those trade secrets. The ruling followed a two-week trial on five of a number of trade secret claims alleged by LightLab.

In a summary judgment ruling issued January 26, 2011, the Court rejected the remainder of Lightlabs claims for protection of its remaining trade secrets, and denied all of Lightlabs
claims for permanent injunctions with respect to those trade secrets. This judgment completed the trade secret portion of the Massachusetts Action.

In a ruling issued January 28, 2011, the Court found that Volcano and Axsun violated 93A, and awarded Lightlab additional damages of $400,000 and reasonable attorneys fees.

In a decision issued February 10, 2011, the Court entered a Final Judgment in the Massachusetts Action: a) in favor of Volcano and
Axsun on Lightlabs claims for trade secret misappropriation on items 1-30 on Lightlabs list of alleged trade secrets, b) ordered Volcano and Axsun to collectively pay $600,000 in damages (which amount includes the $200,000 agreed to in
the Stipulation and the $400,000 order in the 93A ruling) and $4.5 million in attorneys fees, (resulting in a total of $5.1 million recorded to selling, general and administrative expense and accrued in other current liabilities during 2010)
c) in favor of Lightlab on its claims against Axsun for breach of contract, breach of implied covenant of good faith and fair dealing, for violation of 93A, and misappropriation of trade secrets for disclosing three particular items to Volcano in
December 2008  the specifications for the two lasers provided by Axsun to Lightlab and one Axsun laser prototype made in 2008, d) in favor of Lightlab on its claims against Volcano for intentional interference with a contract and advantageous
business relationship, unjust enrichment, violation of 93A, and misappropriation of trade secrets for the same three trade secrets described above. In addition, the Court denied a majority of Lightlabs requested injunctions, and entered
limited injunctive relief, none of which have a material effect upon Volcano.



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Additionally, on February 5, 2010, Volcano and our wholly-owned subsidiary, Axsun,
commenced an action in the Delaware Chancery Court (the Chancery Court Action) against LightLab seeking a declaration of Volcano and Axsuns rights with respect to certain OCT technology, the High Definition Swept
Source. The complaint was served on LightLab on March 19, 2010. LightLab then filed a counter-claim that included a claim against Axsun and Volcano for violations of 93A. Volcano and Axsun moved to dismiss LightLabs 93A
counter-claim, and LightLab responded to that motion by amending its 93A counter-claim. The 93A counterclaim has been stayed pending further action by the Chancery Court. This case has been scheduled for trial on April 25, 2011, although
Lightlab has moved to stay the trial. A hearing has not been scheduled on Lightlabs motion.

LitigationSt. Jude

On July 27, 2010, St. Jude filed a lawsuit against Volcano in federal district court in Delaware (collectively,
with the counterclaims described below, the Delaware Patent Action), alleging that our pressure guide wire products infringe five patents owned by St. Jude. St. Jude is seeking injunctive relief and monetary damages. This action does not
involve OCT technology and is separate from the Massachusetts Action.

On September 20, 2010, Volcano
filed its response, in which we denied the allegations that our PrimeWire(R)products infringe any valid claim of St. Judes asserted patents. In addition, Volcano filed a counterclaim in which we have alleged that St. Judes PressureWire(R)products and its RadiAnalyzer(R)Xpress product infringe three Volcano patents. In our counterclaim,
Volcano is seeking injunctive relief and monetary damages. A trial has been scheduled for October 15, 2012 in this action.

We are not able to predict or estimate the ultimate outcome or range of possible losses relating to the Massachusetts Action, the
Chancery Court Action, the Delaware Patent Action, or any of the other lawsuits, claims or counterclaims described above.

LitigationOther

We may also be a party to various other claims in the normal course of business. Legal fees and other costs associated with such actions are expensed as incurred and were not material in any period
reported. Additionally, we assess, in conjunction with our legal counsel, the need to record a liability for litigation and contingencies. Reserve estimates are recorded when and if it is determined that a loss related matter is both probable and
reasonably estimable. We believe that the ultimate disposition of these matters, including the matters discussed above, will not have a material impact on our consolidated results of operations, financial position or cash flows. Our evaluation of
the likely impact of these matters could change in the future and unfavorable outcomes and/or defense costs, depending upon the amount and timing, could have a material adverse effect on our results of operations or cash flows in future periods.

Licenses

In July 2003, we entered into a license agreement whereby we were granted the rights to certain IVUS technology and patents for total consideration of $6.5 million. This license fee was recorded as
an intangible asset and is being amortized over the estimated useful lives of the patents and technology of ten years. In addition, we are paying royalties during the license period related to the sale of our products using the licensed
technology. The royalties are calculated on a per unit basis using a sliding scale. During the years ended December 31, 2010, 2009 and 2008, royalty expense related to the use of this licensed technology of $680,000, $690,000, and $795,000,
respectively, is recorded in cost of revenues.

In April 2002, we entered into a license agreement with a medical
research clinic whereby we were granted a license to certain patents and technology. During the years ended December 31, 2010, 2009 and 2008, we recorded royalty expense of $441,000, $415,000, and $375,000, respectively, in cost of revenues
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We have entered into certain other licensing agreements with third parties which require us
to make annual royalty payments based on either a minimum dollar amount or as a percentage of net sales, whichever is higher. None of these other agreements are material to our consolidated results of operations or financial position.

Leases

We lease
our domestic and foreign facilities and other equipment under non-cancelable capital and operating lease agreements, which expire at various dates through 2014. In addition to the minimum future lease commitments presented below, the leases
generally require that we pay property taxes, insurance, maintenance and repair costs. Certain leases also contain escalation clauses and renewal option clauses calling for increased rents. Where a lease contains an escalation clause or a concession
such as a rent holiday, rent expense is recognized using the straight-line method over the term of the lease.

At
December 31, 2010, future minimum lease commitments under non-cancelable leases are as follows (in thousands):



|                              |  |         |     |  |           |   |        | 
|----------------------------- |  | ------- | --- |  | --------- | - | ------ | 
|Year Ending December 31,      |  | Capital |     |  | Operating |  
|2011                          |  | $       | 74  |  |           | $ | 5,842  | 
|2012                          |  |         | 73  |  |           |   | 4,555  | 
|2013                          |  |         | 7   |  |           |   | 4,360  | 
|2014                          |  |         |    |  |           |   | 3,992  | 
|2015                          |  |         |    |  |           |   | 657    | 
|                              |  |         |     |  |           |   |        | 
|Net minimum lease payments    |  | $       | 154 |  |           | $ | 19,406 | 
|                              |  |         |     |  |           |   |        | 
|Less:                         |  |         |     |  |           |   |        | 
|Amounts representing interest |  |         | 24  |  |           |   |        | 
|Current                       |  |         | 56  |  |           |   |        | 
|                              |  |         |     |  |           |   |        | 
|Long-term                     |  | $       | 74  |  |           |   |        | 
|                              |  |         |     |  |           |   |        | 

Total rental expense was $6.5 million, $5.7 million, and $3.3 million for the years ended
December 31, 2010, 2009 and 2008, respectively.

Commitments and Other Contractual Obligations

We have obligations under non-cancelable purchase commitments. The majority of these obligations related to inventory, primarily raw
materials. At December 31, 2010, the future minimum payments under these non-cancelable purchase commitments totaled $24.9 million. Approximately $17.7 million of these commitments will require payment prior to December 31, 2011 and the
remaining amount will require payments at various dates through January 2015.

In October 2007, we signed a clinical research
support agreement with a third party in which the third party will conduct clinical studies concerning drug eluting stents. We have agreed to provide a total of $4.6 million to fund clinical study activities. At December 31, 2010, we have a
remaining obligation of up to $3.1 million and we will be billed as services are performed under the agreement. In addition, we have entered into agreements with other third parties to sponsor clinical studies. Generally, we contract with one or
more clinical research sites for a single study and no one agreement is material to our consolidated results of operations or financial condition. We are usually billed as services are performed based on enrollment and are required to make payments
over periods ranging from less than one year up to three years. Our actual payments under these agreements will vary based on enrollment.

On July 8, 2009, we entered into a Distributor Termination Agreement (the Termination Agreement) with Goodman that terminated certain agreements between us and Goodman effective
August 31, 2009 (the Termination Date) and provided for the transition of the distribution, formerly handled by Goodman, of



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Volcano products in Japan to Volcano Japan. Under the Termination Agreement, we paid Goodman 350 million Japanese yen and consumption tax (a total of approximately $3.9 million) and Goodman
transferred and delivered any IVUS and FM consoles owned by Goodman. During the year ended December 31, 2009, approximately 287 million Japanese yen (approximately $3.1 million) was offset against receivables outstanding from Goodman and
we paid the remaining amounts due to Goodman under the Termination Agreement in cash. Consoles acquired by us remain at the customer locations where they had been installed previously. IVUS consoles were recorded at their estimated fair value of
approximately $3.9 million as property and equipment and depreciation will be recorded over their remaining useful lives of 2.5 years. The fair value of the IVUS consoles was measured using a discounted cash flow analysis using inputs developed by
management. Such inputs are classified as Level 3 inputs under FASB ASC Topic 820, Fair Value Measurements and Disclosures(ASC 820). We also repurchased IVUS and FM disposables from Goodman totaling approximately $343,000 on
August 31, 2009. These disposables were recorded as inventory. In addition, from July 1, 2009 to December 31, 2009, we agreed to pay Goodman commissions from the sale of products to sub-distributors or hospitals transferred as
customers from Goodman. We guaranteed minimum total commissions of 310 million Japanese yen (approximately $3.3 million) payable at various dates through January 31, 2010. During the year ended December 31, 2009, we recorded commissions to
Goodman under the Termination Agreement totaling 332 million Japanese yen (approximately $3.7 million) as selling, general, and administrative expense. The aforementioned amounts related to the Termination Agreement have been converted to U.S.
dollars from Japanese yen based on exchange rates in effect in August 2009, except for the commission expense which was converted using actual exchange rates in effect during the period.

On September 22, 2010, we entered into an agreement with Fukuda Denshi Co. Ltd., (Fukuda) to terminate our distribution
relationship. The effective date of the termination was November 30, 2010 (Termination Date). Under the terms of the agreement, as consideration for the early termination of the distribution agreement, we agreed to pay Fukuda
119 million Japanese Yen (approximately $1.4 million) (Termination Payment), of which approximately $710,000 was paid in September 2010, with the remaining amount paid on the Termination Date. The Termination Payment was capitalized
as an intangible asset (customer relationships) and will be amortized over the remaining term of the distribution agreement of eighteen months.

In addition to the Termination Payment we purchased consoles owned by Fukuda (primarily placed in service at third party customer sites) for 181 million Japanese Yen (approximately $2.2 million),
which represents the estimated fair value of these consoles. This amount is capitalized within Property and Equipment, and is being depreciated over the remaining estimated useful life of the assets of approximately two and a half years.
Additionally, we expect to pay Fukuda approximately 83 million Japanese Yen (approximately $1.0 million), net of outstanding accounts receivable, for the purchase of disposables held by Fukuda at the Termination Date that we agreed to
repurchase. We have recorded approximately $3.2 million in other current liabilities at December 31, 2010 related to the repurchase of consoles and disposables.

In September 2010, we entered into a series of agreements under which we agreed to purchase a parcel of land in Costa Rica for $3.0 million for the purpose of constructing a manufacturing facility and we
agreed to retain a firm to construct our cold shell manufacturing building for $10.5 million (20% of which was paid upon execution of the agreement, with the balance payable the eleven-month construction period through 2011). We also entered into an
agreement to retain a construction manager and for the completion of an operational manufacturing facility, including the addition of equipment and related improvements, for approximately $21.5 million which will be paid at various dates throughout
2011 into the first quarter of 2012.

Indemnification

Our supplier, distributor and collaboration agreements generally include certain provisions for indemnification against liabilities if our products are recalled, infringe a third-partys intellectual
property rights or cause bodily injury due to alleged defects in our products. In addition, we have agreements with our executive officers and Board of Directors indemnifying them against liabilities arising from actions taken against us. We



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maintain directors and officers insurance policies that may limit our exposure to such liabilities. To date, we have not incurred any material costs as a result of such
indemnifications and have not accrued any liabilities related to such obligations in the accompanying consolidated financial statements.

Sole source suppliers

We rely on a number of sole source suppliers to supply transducers, substrates and processing for our scanners used in our catheters. We do not carry significant inventory of transducers, substrates or
scanner subassemblies. If we had to change suppliers, we expect that it would take six to 24 months to identify appropriate suppliers, complete design work and undertake the necessary inspections and testing before the new transducers and substrates
would be available. We are not parties to supply agreements with these suppliers but instead use purchase orders as needed.

5.
Stockholders Equity

Common Stock

The Company is authorized to issue 250,000,000 shares of common stock at $0.001 par value per share.

Stockholders Rights Plan

In May 2006, our stockholders approved a
stockholder rights plan and a classified board of directors with staggered terms of election. Pursuant to the stockholder rights plan, we declared and paid a dividend of one right for each share of common stock. Unless redeemed prior to the time the
rights are exercised, upon the occurrence of certain events, the rights will entitle the holders to receive shares of our preferred stock, or shares of an acquiring entity.

Our increase of the authorized shares to 250,000,000 shares, the stockholder rights plan and the classified board of directors became effective upon the consummation of our initial public offering.

Warrants

At December 31, 2007, there was a warrant outstanding to purchase 127,400 shares of our common stock at a price of $3.30 per share. In August 2008, the warrant was exercised using a cashless net
exercise feature that resulted in the issuance of 104,474 shares of common stock.

In connection with our convertible debt
offering discussed in Note 3 Financial Statement DetailsConvertible Debt, we issued approximately 3.9 million warrants that are exercisable at a price of $34.875 per share in equal installments for a period of 50 trading days
beginning on December 1, 2015.

Preferred Stock

The Company is authorized to issue 10,000,000 shares of undesignated preferred stock at $0.001 par value per share. The Board of Directors may determine the rights, preferences, privileges,
qualifications, limitations and restrictions granted or imposed upon any series of preferred stock. As of December 31, 2010, no preferred stock was outstanding.

Equity Compensation Plans

In October 2005, our stockholders
approved the 2005 Equity Compensation Plan (the 2005 Plan). Upon adoption of the 2005 Plan, issuance of stock awards under our 2000 Long Term Incentive Plan ceased.

On July 29, 2009, our stockholders approved an amendment and restatement of our 2005 Plan and the plan was renamed to the Amended
and Restated 2005 Equity Compensation Plan (the 2005 Amended Plan). The



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2005 Amended Plan provides for the grant of incentive stock options, non-statutory stock options, stock appreciation rights, restricted stock awards, restricted stock unit awards
(RSU), performance stock awards, performance cash awards and other stock awards. The 2005 Amended Plan does not allow repricing of stock options without express approval of the stockholders and clarifies that a change in control must
actually occur in order for change in control benefits to be realized. Under the 2005 Amended Plan, an aggregate of 13,712,558 shares of our common stock may be issued or transferred to our employees, non-employee directors and consultants,
representing an increase of 2,050,000 shares over the 2005 Plan. Commencing July 29, 2009, the number of shares of common stock available for issuance under the 2005 Amended Plan (the Available Shares) is reduced by one share for
each share of stock issued pursuant to a stock option or a stock appreciation right and reduced by one and sixty-three hundredths (1.63) shares for each share of common stock issued pursuant to a restricted stock award, RSU, performance stock
award or other stock award.

The maximum term of options granted under the 2005 Amended Plan is seven years. For an initial
grant to an employee, 25% of the options generally vest on the first anniversary of the original vesting date, with the balance vesting monthly over the remaining three years. For subsequent grants to an employee, the options generally vest monthly
over a four-year term. We may grant options that are exercisable immediately regardless of the vesting status of the option with us retaining a right to repurchase exercised unvested shares at the original exercise price of the option. Recipients of
stock options shall be eligible to purchase shares of our common stock at an exercise price no less than the estimated fair market value of such stock on the date of grant.

At December 31, 2010, we have granted stock options and RSUs under the 2005 Amended Plan and we have granted stock options under the 2000 Long Term Incentive Plan (the 2000 Plan).
Commencing in October 2005, stock options, restricted stock awards, and RSUs have been granted under the 2005 Plan. Stock options previously granted under the 2000 Plan and RSUs previously granted under the 2005 Plan that are cancelled or
expire will increase the Available Shares. Such RSUs will increase the Available Shares by one and sixty-three hundredths (1.63) shares for each share of common stock subject to the original award. Shares net exercised or retained to cover a
participants minimum tax withholding obligations will not again become available for issuance under the 2005 Amended Plan. At December 31, 2010, 2,709,633 shares remained available to grant under the 2005 Amended Plan.

Stock Option Activity

Stock option activity for the year ended December 31, 2010 is as follows:



|                                                 |  |              |            |   |                               |   |       |                                                     |  |  |                                        |  |  |   |        | 
|------------------------------------------------ |  | ------------ | ---------- | - | ----------------------------- | - | ----- | --------------------------------------------------- |  |  | -------------------------------------- |  |  | - | ------ | 
|                                                 |  | StockOptions |            |   | Weighted-AverageExercisePrice |   |       | Weighted-AverageRemainingContractual Life(in years) |  |  | AggregateIntrinsic Value(in thousands) | 
|Outstanding at December 31, 2009                 |  |              | 5,513,458  |   |                               | $ | 11.25 |                                                     |  |  |                                        |  |  |   |        | 
|Granted                                          |  |              | 965,142    |   |                               |   | 20.00 |                                                     |  |  |                                        |  |  |   |        | 
|Exercised                                        |  |              | (1,574,405 | ) |                               |   | 8.49  |                                                     |  |  |                                        |  |  |   |        | 
|Forfeited or expired                             |  |              | (292,556   | ) |                               |   | 15.73 |                                                     |  |  |                                        |  |  |   |        | 
|                                                 |  |              |            |   |                               |   |       |                                                     |  |  |                                        |  |  |   |        | 
|Outstanding and exercisable at December 31, 2010 |  |              | 4,611,639  |   |                               |   | 13.74 |                                                     |  |  | 4.4                                    |  |  | $ | 62,588 | 
|                                                 |  |              |            |   |                               |   |       |                                                     |  |  |                                        |  |  |   |        | 
|Vested and expected to vest at December 31, 2010 |  |              | 4,485,952  |   |                               |   | 13.65 |                                                     |  |  | 4.3                                    |  |  |   | 61,299 | 
|                                                 |  |              |            |   |                               |   |       |                                                     |  |  |                                        |  |  |   |        | 



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Options outstanding at December 31, 2010 are summarized as follows:



|              |  |                                     |           |  |                                                     |  |     |                                |  |   |                   |  |  |                                |           |  |  |   |       | 
|------------- |  | ----------------------------------- | --------- |  | --------------------------------------------------- |  | --- | ------------------------------ |  | - | ----------------- |  |  | ------------------------------ | --------- |  |  | - | ----- | 
|              |  | Options Outstanding and Exercisable |           |  | Vested Options                                      | 
|              |  | NumberOutstanding                   |           |  | Weighted-AverageRemainingContractual Life(in years) |  |     | Weighted-AverageExercise Price |  |   | NumberOutstanding |  |  | Weighted-AverageExercise Price |          
|$0.33$6.49   |  |                                     | 951,767   |  |                                                     |  | 3.6 |                                |  | $ | 3.23              |  |  |                                | 951,643   |  |  | $ | 3.23  | 
|$8.36$12.96  |  |                                     | 745,559   |  |                                                     |  | 3.7 |                                |  |   | 11.78             |  |  |                                | 534,667   |  |  |   | 11.49 | 
|$13.16$14.52 |  |                                     | 812,527   |  |                                                     |  | 5.0 |                                |  |   | 13.85             |  |  |                                | 370,212   |  |  |   | 13.75 | 
|$14.72$18.90 |  |                                     | 385,087   |  |                                                     |  | 4.5 |                                |  |   | 16.49             |  |  |                                | 261,575   |  |  |   | 16.39 | 
|$19.07        |  |                                     | 675,091   |  |                                                     |  | 6.1 |                                |  |   | 19.07             |  |  |                                | 134,662   |  |  |   | 19.07 | 
|$19.11        |  |                                     | 661,996   |  |                                                     |  | 2.9 |                                |  |   | 19.11             |  |  |                                | 646,459   |  |  |   | 19.11 | 
|$19.77$25.57 |  |                                     | 379,612   |  |                                                     |  | 5.1 |                                |  |   | 22.06             |  |  |                                | 177,735   |  |  |   | 20.58 | 
|              |  |                                     |           |  |                                                     |  |     |                                |  |   |                   |  |  |                                |           |  |  |   |       | 
|$0.33$25.57  |  |                                     | 4,611,639 |  |                                                     |  | 4.4 |                                |  |   | 13.74             |  |  |                                | 3,076,953 |  |  |   | 12.08 | 
|              |  |                                     |           |  |                                                     |  |     |                                |  |   |                   |  |  |                                |           |  |  |   |       | 

Non-vested stock option activity for the year ended at December 31, 2010 is as follows:



|                                 |  |                        |            |   |                                      |   |      | 
|-------------------------------- |  | ---------------------- | ---------- | - | ------------------------------------ | - | ---- | 
|                                 |  | Non-vestedStockOptions |            |   | Weighted-AverageGrant Date FairValue |  
|Outstanding at December 31, 2009 |  |                        | 1,879,243  |   |                                      | $ | 6.64 | 
|Granted                          |  |                        | 965,142    |   |                                      |   | 7.93 | 
|Vested                           |  |                        | (1,025,601 | ) |                                      |   | 7.15 | 
|Forfeited or expired             |  |                        | (284,098   | ) |                                      |   | 4.30 | 
|                                 |  |                        |            |   |                                      |   |      | 
|Outstanding at December 31, 2010 |  |                        | 1,534,686  |   |                                      |   | 5.75 | 
|                                 |  |                        |            |   |                                      |   |      | 

The total grant date fair value of stock options vested during the year ended December 31,
2010 was $7.3 million.

Restricted Stock Unit Activity

RSU activity for the year ended December 31, 2010 is as follows:



|                                 |  |                       |          |  
|-------------------------------- |  | --------------------- | -------- | -
|                                 |  | RestrictedStock Units |         
|Outstanding at December 31, 2009 |  |                       | 733,898  |  
|Granted                          |  |                       | 341,788  |  
|Vested                           |  |                       | (204,638 | )
|Forfeited or expired             |  |                       | (125,558 | )
|                                 |  |                       |          |  
|Outstanding at December 31, 2010 |  |                       | 745,490  |  
|                                 |  |                       |          |  

These time-vested RSUs entitle the holder to shares of common stock as the units vest in equal annual
installments over a four-year period. The weighted-average grant-date fair value of each RSU granted during the year ended December 31, 2010, 2009 and 2008 was $19.17, $13.69 and $12.95, respectively.

During the year ended December 31, 2010, we released 204,638 shares of common stock based on the vesting terms of certain RSU
agreements.

There was no common stock held in treasury as of December 31, 2010.



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Employee Stock Purchase Plan Activity

In June 2007, our stockholders approved the adoption of our 2007 Employee Stock Purchase Plan (Purchase Plan). The Purchase
Plan provides eligible employees the opportunity to purchase shares of our common stock at the lower of up to 85% of the fair market value on the first or last day of the applicable offering period, by having withheld from their salary an amount up
to 15% of their compensation, without paying brokerage fees or commissions on purchases. Our Purchase Plan is deemed to be compensatory, and therefore, Purchase Plan expense has been included in our consolidated statements of operations for the
years ended December 31, 2010, 2009 and 2008. We pay for the administrative expenses of the Purchase Plan. No employee may purchase more than $25,000 worth of common stock (calculated at the time the purchase right is granted) in any calendar
year, nor may purchase more than 750 shares in any six-month purchase period.

Commencing January 1,
2008, common stock reserved for issuance under the Purchase Plan automatically increases by the lower of
11/2% of our outstanding common stock or 600,000
shares on the first day of January of each year. In November 2008, 2009, and 2010, the Board of Directors exercised its right not to increase the number of shares of common stock available for issuance under the Purchase Plan that was scheduled to
occur on January 1, 2009, January 1, 2010, and January 1, 2011, respectively. As a result, at December 31, 2010, the number of shares of common stock reserved for issuance under the Purchase Plan remained at 1,100,000, and
589,449 shares of common stock were available for issuance under the Purchase Plan.

During the years ended
December 31, 2010, 2009, and 2008 187,215, 175,323, and 151,013 shares, respectively, were purchased at an average per share price of $14.64, $12.11, and $10.36, respectively.

Fair Value Assumptions

The fair value of each stock option is estimated on
the date of grant using the Black-Scholes model utilizing the following weighted-average assumptions:



|                                       |  |                          |      |   |      |   |      |      |  |   |      |  
|-------------------------------------- |  | ------------------------ | ---- | - | ---- | - | ---- | ---- |  | - | ---- | -
|                                       |  | Years Ended December 31, |     
|                                       |  | 2010                     |      |   | 2009 |   |      | 2008 | 
|Risk-free interest rate                |  |                          | 2.3  | % |      |   | 2.1  | %    |  |   | 2.9  | %
|Expected life (years)                  |  |                          | 4.6  |   |      |   | 5.0  |      |  |   | 5.0  |  
|Estimated volatility                   |  |                          | 46.4 | % |      |   | 46.2 | %    |  |   | 49.3 | %
|Expected dividends                     |  |                          | None |   |      |   | None |      |  |   | None |  
|Weighted-average grant date fair value |  | $                        | 8.19 |   |      | $ | 5.92 |      |  | $ | 6.04 |  

The risk-free
interest rate for periods within the contractual life of the stock option is based on the implied yield available on U.S. Treasury constant maturity securities with the same or substantially equivalent remaining terms at the time of grant.

For options granted January 1, 2006 through December 31, 2007, we adopted a temporary shortcut approach
as permitted by Staff Accounting Bulletin No. 107 to develop an expected life of an employee stock option. Under this approach, the expected life is presumed to be the mid-point between the vesting date and the contractual end of the option
term. Since January 1, 2008, we have used our historical stock option exercise experience to estimate the expected term of our stock options.

Estimated volatility was calculated using the historical volatility of the common stock of comparable companies using weekly price observations over a period generally commensurate with the expected term
of our options. We did not exclude any period due to discrete historical events. We use the historical volatility of similar companies due to the limited trading history of our common stock. Since the completion of our initial public offering, we
have also included the weekly price observations of our common stock, weighted for the number of price observations, in our estimate of volatility. We also evaluate, at least annually, whether circumstances have



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changed such that the identified entities are no longer similar to us, and remove or replace the peer company in our analysis. We will continue to assess the appropriateness of our methodology
for future periods.

We use a zero value of the expected dividend value factor since we have not declared any dividends in the
past and we do not anticipate declaring any dividends in the foreseeable future.

The first offering period under the Purchase
Plan commenced in September 2007. The fair value of each purchase option under the Purchase Plan is estimated at the beginning of each purchase period using the Black-Scholes model utilizing the following weighted-average assumptions:



|                             |  |                          |      |   |      |   |      |      |  |   |      |  
|---------------------------- |  | ------------------------ | ---- | - | ---- | - | ---- | ---- |  | - | ---- | -
|                             |  | Years Ended December 31, |     
|                             |  | 2010                     |      |   | 2009 |   |      | 2008 | 
|Risk-free interest rate      |  |                          | 0.2  | % |      |   | 0.6  | %    |  |   | 2.5  | %
|Expected life (years)        |  |                          | 0.5  |   |      |   | 0.5  |      |  |   | 0.5  |  
|Estimated volatility         |  |                          | 36.6 | % |      |   | 61.2 | %    |  |   | 49.2 | %
|Expected dividends           |  |                          | None |   |      |   | None |      |  |   | None |  
|Fair value of purchase right |  | $                        | 5.15 |   |      | $ | 4.66 |      |  | $ | 3.64 |  

The computation of
the expected volatility assumption used in the Black-Scholes model for purchase rights is based on the trading history of our common stock. The expected life assumption is based on the six-month term of each offering period. The risk-free interest
rate is based on the U.S. Treasury constant maturity securities with the same or substantially equivalent remaining term in effect at the beginning of the offering period. We use a zero value for the expected dividend value factor since we have not
declared any dividends in the past and we do not anticipate declaring any dividends in the foreseeable future.

Stock-Based Compensation
Expense

The following table sets forth stock-based compensation expense included in our consolidated statements of
operations (in thousands):



|                                    |  |                          |        |  |      |   |        |      |  |   |       | 
|----------------------------------- |  | ------------------------ | ------ |  | ---- | - | ------ | ---- |  | - | ----- | 
|                                    |  | Years Ended December 31, |       
|                                    |  | 2010                     |        |  | 2009 |   |        | 2008 | 
|Cost of revenues                    |  | $                        | 760    |  |      | $ | 809    |      |  | $ | 810   | 
|Selling, general and administrative |  |                          | 10,210 |  |      |   | 8,604  |      |  |   | 6,957 | 
|Research and development            |  |                          | 1,497  |  |      |   | 1,472  |      |  |   | 1,770 | 
|                                    |  |                          |        |  |      |   |        |      |  |   |       | 
|                                    |  | $                        | 12,467 |  |      | $ | 10,885 |      |  | $ | 9,537 | 
|                                    |  |                          |        |  |      |   |        |      |  |   |       | 

Included in our stock-based compensation expense is $673,000, $271,000 and $230,000 of stock-based
compensation expense related to non-employees in the years ended December 31, 2010, 2009 and 2008, respectively. In the years ended December 31, 2010, 2009 and 2008, we recorded $928,000, $841,000 and $560,000, respectively, of stock-based
compensation expense related to the Purchase Plan. At December 31, 2010 and 2009, there was $223,000 and $265,000, respectively, of total stock-based compensation cost capitalized in inventories.

We estimate forfeitures and only recognize expense for those shares expected to vest. Our estimated forfeiture rates in the years ended
December 31, 2010, 2009 and 2008 are based on our historical forfeiture experience.

Stock option excess tax benefits of
$433,000 were credited to additional paid-in-capital during the year ended December 31, 2010.



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The total intrinsic value of stock options exercised during the year ended
December 31, 2010, 2009 and 2008 was $23.5 million, $7.4 million and $9.1 million, respectively, and represents the difference between the exercise price of the option and the fair value of our common stock on the dates exercised. At
December 31, 2010, there was $10.3 million, $9.9 million, and $171,000 of total unrecognized employee compensation cost related to stock options, RSUs and the Purchase Plan, respectively, which is expected to be recognized over a weighted
average of 2.5 years, 2.4 years, and 0.2 years, respectively.

Accumulated Other Comprehensive Loss

The following table summarizes the components of our accumulated other comprehensive loss (in thousands):



|                                                     |  |              |      |   |      |   |        |  
|---------------------------------------------------- |  | ------------ | ---- | - | ---- | - | ------ | -
|                                                     |  | December 31, |     
|                                                     |  | 2010         |      |   | 2009 |  
|Unrealized loss on available-for-sale investments    |  | $            | (14  | ) |      | $ | (6     | )
|Accumulated foreign currency translation adjustments |  |              | (579 | ) |      |   | (4,073 | )
|                                                     |  |              |      |   |      |   |        |  
|                                                     |  | $            | (593 | ) |      | $ | (4,079 | )
|                                                     |  |              |      |   |      |   |        |  

6. Income Taxes

The provisions for income tax expense are as follows (in thousands):



|                           |  |                          |        |   |      |   |        |      |  |   |        |  
|-------------------------- |  | ------------------------ | ------ | - | ---- | - | ------ | ---- |  | - | ------ | -
|                           |  | Years Ended December 31, |       
|                           |  | 2010                     |        |   | 2009 |   |        | 2008 | 
|Current:                   |  |                          |        |   |      |   |        |      |  |   |        |  
|Federal                    |  | $                        |       |   |      | $ | (148   | )    |  | $ |       |  
|State                      |  |                          | 584    |   |      |   | 133    |      |  |   | 105    |  
|Foreign                    |  |                          | 1,588  |   |      |   | 1,492  |      |  |   | 754    |  
|                           |  |                          |        |   |      |   |        |      |  |   |        |  
|                           |  |                          | 2,172  |   |      |   | 1,477  |      |  |   | 859    |  
|                           |  |                          |        |   |      |   |        |      |  |   |        |  
|Deferred:                  |  |                          |        |   |      |   |        |      |  |   |        |  
|Federal                    |  |                          | 2,727  |   |      |   | (4,678 | )    |  |   | 1,838  |  
|State                      |  |                          | 404    |   |      |   | 630    |      |  |   | 172    |  
|Foreign                    |  |                          | (426   | ) |      |   | (696   | )    |  |   | (986   | )
|                           |  |                          |        |   |      |   |        |      |  |   |        |  
|                           |  |                          | 2,705  |   |      |   | (4,744 | )    |  |   | 1,024  |  
|                           |  |                          |        |   |      |   |        |      |  |   |        |  
|Valuation allowance        |  |                          | (2,790 | ) |      |   | 4,454  |      |  |   | (1,263 | )
|                           |  |                          |        |   |      |   |        |      |  |   |        |  
|Provision for income taxes |  | $                        | 2,087  |   |      | $ | 1,187  |      |  | $ | 620    |  
|                           |  |                          |        |   |      |   |        |      |  |   |        |  

Income before income taxes relating to non-U.S. operations was $685,000 in the year ended December 31,
2010, and losses before income taxes relating to non-U.S. operations were $738,000 and $150,000 in the years ended December 31, 2009 and 2008, respectively.



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Provisions for income taxes in the accompanying consolidated statements of operations differ
from the expense calculated by applying the U.S. federal statutory income tax rate of 35% to loss before provision for income taxes due to the following (in thousands):



|                                                            |  |                          |        |   |      |   |        |      |  |   |        |  
|----------------------------------------------------------- |  | ------------------------ | ------ | - | ---- | - | ------ | ---- |  | - | ------ | -
|                                                            |  | Years Ended December 31, |       
|                                                            |  | 2010                     |        |   | 2009 |   |        | 2008 | 
|U.S. federal statutory income tax expense (benefit)         |  | $                        | 2,564  |   |      | $ | (9,718 | )    |  | $ | (4,580 | )
|State income tax benefit, net of federal income tax expense |  |                          | 584    |   |      |   | 717    |      |  |   | 240    |  
|Valuation allowance                                         |  |                          | (2,790 | ) |      |   | 4,303  |      |  |   | 1,107  |  
|Foreign tax rate differential                               |  |                          | 196    |   |      |   | 1,750  |      |  |   | (176   | )
|Credits                                                     |  |                          | (678   | ) |      |   | (1,097 | )    |  |   | (558   | )
|In-process research and development                         |  |                          |       |   |      |   | 4,911  |      |  |   | 4,334  |  
|Permanent differences and other                             |  |                          | 2,211  |   |      |   | 321    |      |  |   | 253    |  
|                                                            |  |                          |        |   |      |   |        |      |  |   |        |  
|                                                            |  | $                        | 2,087  |   |      | $ | 1,187  |      |  | $ | 620    |  
|                                                            |  |                          |        |   |      |   |        |      |  |   |        |  

The components of our deferred tax assets are as follows (in thousands):



|                                      |  |              |         |   |      |   |         |  
|------------------------------------- |  | ------------ | ------- | - | ---- | - | ------- | -
|                                      |  | December 31, |        
|                                      |  | 2010         |         |   | 2009 |  
|Deferred tax assets:                  |  |              |         |   |      |   |         |  
|Net operating loss carryovers         |  | $            | 17,630  |   |      | $ | 22,722  |  
|Tax credit carryovers                 |  |              | 7,326   |   |      |   | 6,248   |  
|Depreciation and amortization         |  |              |        |   |      |   | 1,391   |  
|Accruals and deferred revenue         |  |              | 5,855   |   |      |   | 3,455   |  
|Stock based compensation              |  |              | 7,044   |   |      |   | 6,416   |  
|Original issue discount               |  |              | 1,728   |   |      |   |        |  
|Other, net                            |  |              |        |   |      |   | 2,100   |  
|                                      |  |              |         |   |      |   |         |  
|Total deferred tax assets             |  |              | 39,583  |   |      |   | 42,332  |  
|Deferred tax liabilities:             |  |              |         |   |      |   |         |  
|Depreciation and amortization         |  |              | (3,456  | ) |      |   |        |  
|                                      |  |              |         |   |      |   |         |  
|Deferred tax assets:                  |  |              | 36,127  |   |      |   | 42,332  |  
|                                      |  |              |         |   |      |   |         |  
|Valuation allowance                   |  |              | (36,989 | ) |      |   | (41,724 | )
|                                      |  |              |         |   |      |   |         |  
|Net deferred tax assets (liabilities) |  | $            | (862    | ) |      | $ | 608     |  
|                                      |  |              |         |   |      |   |         |  

A valuation allowance has been established within the U.S. and selected international jurisdictions to
offset deferred tax assets, as realization of such assets is not more likely than not.

As a result of certain realization
requirements of ASC 718, the table of deferred tax assets shown above does not include certain deferred tax assets at December 31, 2010 and 2009 that arose directly from tax deductions related to equity compensation in excess of compensation
recognized for financial reporting. Equity will be increased by approximately $13.2 million if and when such deferred tax assets are ultimately realized. We use the with-and-without approach for purposes of determining when excess tax benefits have
been realized. Stock option excess tax benefits of $433,000 were credited to additional paid-in-capital during the year ended December 31, 2010.

Included in our net deferred tax asset balance at December 31, 2010, is a $1.7 million deferred tax asset representing future tax deductions of original issue discount in excess of book expense
related to the Companys hedge transaction. The aforementioned deferred tax asset and corresponding valuation allowance were recorded with an offset to additional-paid-in-capital (APIC). If, and when, the Companys valuation allowance is
released, any remaining benefit attributable to such deferred tax asset will be recognized as an increase to APIC.



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At December 31, 2010, we have federal and state net operating loss carryforwards of
approximately $67.3 million and $34.8 million, respectively. The federal and state net operating loss carryforwards begin to expire in 2020 and 2012, respectively, unless previously utilized. In addition, we have federal and state research and
experimentation tax credit carryforwards of approximately $4.7 million and $4.0 million, respectively. The federal credits begin to expire in 2022. The state credits carry forward indefinitely. Foreign net operating losses are approximately $15.4
million and carry forward indefinitely.

Pursuant to Internal Revenue Code Section 382, use of net operating loss
carryforwards related to acquisitions of approximately $31.6 million may be limited. These carryforwards will expire if we are unable to generate sufficient taxable income within the carryforward period.

At December 31, 2010, the total amount of gross unrecognized tax benefits, including interest and penalties, was approximately
$878,000. If recognized, these benefits would affect our effective tax rate. The aggregate change in the balances of these benefits is as follows (in thousands):



|                                                                 |  |                          |     |   |      |   |     |      |  |   |     | 
|---------------------------------------------------------------- |  | ------------------------ | --- | - | ---- | - | --- | ---- |  | - | --- | 
|                                                                 |  | Years Ended December 31, |    
|                                                                 |  | 2010                     |     |   | 2009 |   |     | 2008 | 
|Balance at beginning of year                                     |  | $                        | 578 |   |      | $ | 313 |      |  | $ | 213 | 
|Increases related to tax positions taken during the current year |  |                          | 306 |   |      |   | 264 |      |  |   | 93  | 
|Increases related to tax positions taken during a prior period   |  |                          | (6  | ) |      |   | 1   |      |  |   | 7   | 
|                                                                 |  |                          |     |   |      |   |     |      |  |   |     | 
|Balance at end of year                                           |  | $                        | 878 |   |      | $ | 578 |      |  | $ | 313 | 
|                                                                 |  |                          |     |   |      |   |     |      |  |   |     | 

We accrue interest and penalties on underpayment of income taxes related to unrecognized tax benefits as a
component of income tax expense in our consolidated statements of operations. The amounts recognized for interest and penalties during the years ended December 31, 2010, 2009 and 2008 were $25,000, $23,000, and $10,000, respectively.

We are open for audit by the U.S. Internal Revenue Service and state tax jurisdictions from our inception in 2000 through
2010. We were audited by the Belgian tax authorities for the 2005 and 2006 years. There were no significant adjustments as a result of this audit. We continue to be open for audit by Belgium and various European tax jurisdictions from the inception
of Volcano Europe in 2003 through 2010, and by South Africa from the inception of Volcano South Africa in 2008 through 2010. We were audited by the Japanese tax authorities for the 2005 through 2007 years. There were no significant adjustments as a
result of this audit. We continue to be open for audit by the Japanese tax authorities from the inception of Volcano Japan in 2004 through 2010.

7. Segment and Geographic Information

Our chief operating decision-maker
reviews financial information presented on a consolidated basis, accompanied by disaggregated information about segment revenues by product and geographic region for purposes of making operating decisions and assessing financial performance.
Historically, we considered ourselves to be a single reporting segment, specifically the manufacture, sale, discovery, development and commercialization of products for the diagnosis of atherosclerosis in the coronary arteries and peripheral
vascular system (medical segment). In connection with our acquisition of Axsun in December 2008, we operate an additional segment, specifically the discovery, development, manufacture and sale of micro-optical spectrometers and optical
channel monitors to telecommunications and other industrial companies (industrial segment).

We do not assess the
performance of our segments on other measures of income or expense, such as depreciation and amortization, operating income or net income. We do not produce reports for, or measure the performance of, our segments on any asset-based metrics.
Therefore, segment information is presented only for revenues by product.



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The following table sets forth our revenues by segment and product (in thousands):



|                              |      |                          |         |      |                   |   |         |  |  |              |         |  |              |  |      |   |  |  |         |    
|----------------------------- | ---- | ------------------------ | ------- | ---- | ----------------- | - | ------- |  |  | ------------ | ------- |  | ------------ |  | ---- | - |  |  | ------- | ---
|                              |      | Years Ended December 31, |         |      | Percentage Change |  
|                              | 2010 |                          |         | 2009 |                   |   | 2008    |  |  | 2009 to 2010 |         |  | 2008 to 2009 | 
|Medical segment:              |      |                          |         |      |                   |   |         |  |  |              |         |  |              |  |      |   |  |  |         |    
|Consoles                      |      | $                        | 40,630  |      |                   | $ | 39,438  |  |  | $            | 40,068  |  |              |  | 3.0  | % |  |  | (1.6    | ) %
|Single-procedure disposables: |      |                          |         |      |                   |   |         |  |  |              |         |  |              |  |      |   |  |  |         |    
|IVUS                          |      |                          | 167,023 |      |                   |   | 130,785 |  |  |              | 107,037 |  |              |  | 27.7 |   |  |  | 22.2    |    
|FM                            |      |                          | 46,517  |      |                   |   | 31,125  |  |  |              | 17,388  |  |              |  | 49.5 |   |  |  | 79.0    |    
|Other                         |      |                          | 16,943  |      |                   |   | 10,345  |  |  |              | 6,424   |  |              |  | 63.8 |   |  |  | 61.0    |    
|                              |      |                          |         |      |                   |   |         |  |  |              |         |  |              |  |      |   |  |  |         |    
|Sub-total medical segment     |      |                          | 271,113 |      |                   |   | 211,693 |  |  |              | 170,917 |  |              |  | 28.1 |   |  |  | 23.9    |    
|Industrial segment            |      |                          | 23,033  |      |                   |   | 16,174  |  |  |              | 578     |  |              |  | 42.4 |   |  |  | 2,698.3 |    
|                              |      |                          |         |      |                   |   |         |  |  |              |         |  |              |  |      |   |  |  |         |    
|                              |      | $                        | 294,146 |      |                   | $ | 227,867 |  |  | $            | 171,495 |  |              |  | 29.1 | % |  |  | 32.9    | %  
|                              |      |                          |         |      |                   |   |         |  |  |              |         |  |              |  |      |   |  |  |         |    

In 2009 and 2008, $0.6 million and $0.9 million, respectively, were reclassified from
single-procedure disposables (IVUS) to other.

The following table sets forth our revenues by
geography expressed as dollar amounts (in thousands) and the changes in revenues in the specified periods expressed as percentages:



|                                   |  |                          |         |  |                   |   |         |      |  |   |              |  |  |              |      |   |  |  |       |  
|---------------------------------- |  | ------------------------ | ------- |  | ----------------- | - | ------- | ---- |  | - | ------------ |  |  | ------------ | ---- | - |  |  | ----- | -
|                                   |  | Years Ended December 31, |         |  | Percentage Change |  
|                                   |  | 2010                     |         |  | 2009              |   |         | 2008 |  |   | 2009 to 2010 |  |  | 2008 to 2009 |     
|Revenues (1):                      |  |                          |         |  |                   |   |         |      |  |   |              |  |  |              |      |   |  |  |       |  
|United States                      |  | $                        | 134,645 |  |                   | $ | 110,502 |      |  | $ | 87,513       |  |  |              | 21.8 | % |  |  | 26.3  | %
|Japan                              |  |                          | 79,277  |  |                   |   | 52,339  |      |  |   | 43,582       |  |  |              | 51.5 |   |  |  | 20.1  |  
|Europe, the Middle East and Africa |  |                          | 57,614  |  |                   |   | 47,609  |      |  |   | 33,197       |  |  |              | 21.0 |   |  |  | 43.4  |  
|Rest of world                      |  |                          | 22,610  |  |                   |   | 17,417  |      |  |   | 7,203        |  |  |              | 29.8 |   |  |  | 141.8 |  
|                                   |  |                          |         |  |                   |   |         |      |  |   |              |  |  |              |      |   |  |  |       |  
|                                   |  | $                        | 294,146 |  |                   | $ | 227,867 |      |  | $ | 171,495      |  |  |              | 29.1 |   |  |  | 32.9  |  
|                                   |  |                          |         |  |                   |   |         |      |  |   |              |  |  |              |      |   |  |  |       |  



|(1) | Revenues are attributed to geographies based on the location of the customer, except for shipments to original equipment manufacturers, which are attributed to the
country of the origin of the equipment distributed.
|--- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

In 2009, $4.7 million was reclassified from Europe,
the Middle East and Africa to Japan.

At December 31, 2010, approximately 51% of our long-lived assets,
excluding financial assets, are located in the U.S., approximately 34% are located in Japan, and less than 15% are located in our remaining geographies. At December 31, 2009, approximately 59% of our long-lived assets, excluding financial
assets, were located in the U.S., approximately 33% are located in Japan, and less than 10% are located in our remaining geographies.

At December 31, 2010, goodwill of $2.5 million has been allocated entirely to our medical segment and relates to our U.S. operations.

8. Employee Benefits

Defined Contribution Plans

We have a defined contribution 401(k) plan for our U.S. employees who are at least 21 years of age. Employees are eligible to
participate in the plan beginning on the first day of the month following their first date of hire. Under the terms of the plan, employees may make voluntary contributions as a percent of compensation or as a fixed amount per pay period. Our
contributions to the plan are discretionary. Beginning January 1, 2008, we match 25% of participant contributions up to a maximum of 6% of the participants annual salary. In addition, we added employees from Axsun to our plan during the
year ended December 31, 2009. Matching contributions of $793,000, $710,000, and $469,000 were made during the years ended December 31, 2010, 2009, and 2008, respectively.



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We also sponsor additional defined contribution plans for most of our European employees.
Contributions under all plans were $361,000, $315,000 and $273,000 in the years ended December 31, 2010, 2009 and 2008, respectively.

9. Quarterly Information (Unaudited)

The following table sets forth our unaudited quarterly summary consolidated statements of operations in each of the quarters for the years ended December 31, 2010 and 2009. The information for each
of these quarters is unaudited and has been prepared on the same basis as our audited consolidated financial statements. This data should be read in conjunction with our consolidated financial statements and related notes. These operating results
may not be indicative of results to be expected for any future period (amounts in thousands, except per share data).



|                                                         |  |                           |        |   |                        |   |        |              |  |   |                 |   |  |   |         |   |  |   |         |  
|-------------------------------------------------------- |  | ------------------------- | ------ | - | ---------------------- | - | ------ | ------------ |  | - | --------------- | - |  | - | ------- | - |  | - | ------- | -
|                                                         |  | Quarter Ended (unaudited) |        |   | Year 
endedDecember 31 |  
|                                                         | 
|2010                                                     |  | March 31                  |        |   | June 30                |   |        | September 30 |  |   | December 31 (1) |   | 
|Revenue                                                  |  | $                         | 66,572 |   |                        | $ | 73,452 |              |  | $ | 72,886          |   |  | $ | 81,236  |   |  | $ | 294,146 |  
|Gross profit                                             |  |                           | 39,934 |   |                        |   | 46,359 |              |  |   | 46,931          |   |  |   | 52,062  |   |  |   | 185,286 |  
|Operating (loss) income                                  |  |                           | (3,608 | ) |                        |   | 6,029  |              |  |   | 6,554           |   |  |   | 996     |   |  |   | 9,971   |  
|Net (loss) income                                        |  |                           | (4,036 | ) |                        |   | 5,416  |              |  |   | 5,585           |   |  |   | (1,725  | ) |  |   | 5,240   |  
|Net (loss) income per share:                             |  |                           |        |   |                        |   |        |              |  |   |                 |   |  |   |         |   |  |   |         |  
|Basic                                                    |  | $                         | (0.08  | ) |                        | $ | 0.11   |              |  | $ | 0.11            |   |  | $ | (0.03   | ) |  | $ | 0.10    |  
|Diluted                                                  |  | $                         | (0.08  | ) |                        | $ | 0.10   |              |  | $ | 0.10            |   |  | $ | (0.03   | ) |  | $ | 0.10    |  
|Includes the following stock-based compensation expense: |  |                           |        |   |                        |   |        |              |  |   |                 |   |  |   |         |   |  |   |         |  
|Cost of revenues                                         |  | $                         | 203    |   |                        | $ | 198    |              |  | $ | 185             |   |  | $ | 174     |   |  | $ | 760     |  
|Selling, general and administrative                      |  |                           | 2,538  |   |                        |   | 2,522  |              |  |   | 2,503           |   |  |   | 2,647   |   |  |   | 10,210  |  
|Research and development                                 |  |                           | 342    |   |                        |   | 388    |              |  |   | 360             |   |  |   | 407     |   |  |   | 1,497   |  
|                                                         |  |                          
|                                                         |  | Quarter Ended (unaudited) |        |   | Year 
endedDecember 31 |  
|                                                         | 
|2009                                                     |  | March 31                  |        |   | June 30                |   |        | September 30 |  |   | December 31 (2) |   | 
|Revenue                                                  |  | $                         | 48,959 |   |                        | $ | 54,042 |              |  | $ | 53,852          |   |  | $ | 71,014  |   |  | $ | 227,867 |  
|Gross profit                                             |  |                           | 28,310 |   |                        |   | 31,556 |              |  |   | 32,074          |   |  |   | 44,438  |   |  |   | 136,378 |  
|Operating loss                                           |  |                           | (6,591 | ) |                        |   | (5,816 | )            |  |   | (6,437          | ) |  |   | (12,002 | ) |  |   | (30,846 | )
|Net loss                                                 |  |                           | (7,614 | ) |                        |   | (5,267 | )            |  |   | (3,998          | ) |  |   | (12,075 | ) |  |   | (28,954 | )
|Net loss per sharebasic and diluted                     |  | $                         | (0.16  | ) |                        | $ | (0.11  | )            |  | $ | (0.08           | ) |  | $ | (0.25   | ) |  | $ | (0.60   | )
|Includes the following stock-based compensation expense: |  |                           |        |   |                        |   |        |              |  |   |                 |   |  |   |         |   |  |   |         |  
|Cost of revenues                                         |  | $                         | 211    |   |                        | $ | 174    |              |  | $ | 217             |   |  | $ | 207     |   |  | $ | 809     |  
|Selling, general and administrative                      |  |                           | 2,080  |   |                        |   | 2,308  |              |  |   | 2,024           |   |  |   | 2,192   |   |  |   | 8,604   |  
|Research and development                                 |  |                           | 424    |   |                        |   | 368    |              |  |   | 357             |   |  |   | 323     |   |  |   | 1,472   |  



|(1) | During the quarter ended December 31, 2010, we recorded a $3.0 million reduction in in-process research and development expenses related to the reversal of an
accrual for a milestone payment of $3.0 million originally recognized in 2009 related to our FL.IVUS project acquired from Novelis, as we believed we no longer would achieve the milestone. Additionally, the fourth quarter of 2010 includes expense of
$4.9 million in relation to the LightLab legal settlement discussed in Note 4, Commitments and Other Contractual ObligationsLitigationLightLab.
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(2) | During the quarter ended December 31, 2009, we recorded $14.0 million of IPR&D expense. Of this amount $11.0 million related to a milestone of the
CardioSpectra acquisition and $3.0 million related to an accrual for a milestone payment related to the Novelis acquisition.
|--- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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|Item 9. | Changes in and Disagreements With Accountants on Accounting and Financial Disclosure
|------- | ------------------------------------------------------------------------------------

None



|Item 9A. | Controls and Procedures
|-------- | -----------------------

Evaluation of
Disclosure Controls and Procedures

Under the supervision and with the participation of our management, including our Chief
Executive Officer and our Chief Financial Officer, we carried out an evaluation of the effectiveness of the design and operation of our disclosure controls and procedures as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange
Act of 1934, as amended (the Exchange Act). Based on that evaluation, our Chief Executive Officer and our Chief Financial Officer have concluded that, at December 31, 2010, such disclosure controls and procedures were effective.

Disclosure controls and procedures are controls and other procedures that are designed to ensure that information required to
be disclosed in our reports filed or submitted under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SECs rules and forms. Disclosure controls and procedures include, without
limitation, controls and procedures designed to ensure that information required to be disclosed in our reports filed or submitted under the Exchange Act is accumulated and communicated to management, including our Chief Executive Officer and Chief
Financial Officer, or persons performing similar functions, as appropriate, to allow timely decisions regarding required disclosure.

Limitations on the Effectiveness of Controls

Our disclosure controls and procedures are designed to provide reasonable, not absolute, assurance that the objectives of our disclosure control system are met. Because of inherent limitations in all
control systems, no evaluation of controls can provide absolute assurance that all control issues, if any, within a company have been detected. Our Chief Executive Officer and Chief Financial Officer have concluded, based on their evaluation as of
the end of the period covered by this report, that our disclosure controls and procedures were sufficiently effective to provide reasonable assurance that the objectives of our disclosure control system were met.

Changes in Internal Control Over Financial Reporting

Under the supervision and with the participation of our management, including our Chief Executive Officer and our Chief Financial Officer, we carried out an evaluation of any potential changes in our
internal control over financial reporting during our last fiscal year. There were no changes in our internal control over financial reporting during the year ended December 31, 2010 that our certifying officers concluded materially affected, or
are reasonably likely to materially affect, our internal control over financial reporting.

Managements Report on Internal Control
Over Financial Reporting

As required by the SEC rules and regulations for the implementation of Section 404 of the
Sarbanes-Oxley Act, our management is responsible for establishing and maintaining adequate internal control over financial reporting. Our internal control over financial reporting is designed to provide reasonable assurance regarding the
reliability of financial reporting and the preparation of our consolidated financial statements for external reporting purposes in accordance with accounting principles generally accepted in the U.S. of America. Our internal control over financial
reporting includes those policies and procedures that:



| | (1) | Pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the Company,
| | --- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (2) | Provide reasonable assurance that transactions are recorded as necessary to permit preparation of consolidated financial statements in accordance with
accounting principles generally accepted in the
| | --- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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| | U.S. of America, and that our receipts and expenditures are being made only in accordance with authorizations of our management and directors, and
| | --------------------------------------------------------------------------------------------------------------------------------------------------



| | (3) | Provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of our assets that could have a material effect on
the consolidated financial statements.
| | --- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Because of its inherent limitations, internal control over financial
reporting may not prevent or detect misstatements in our consolidated financial statements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in
conditions, or that the degree or compliance with the policies or procedures may deteriorate. Management assessed the effectiveness of the Companys internal control over financial reporting as of December 31, 2010. In making these
assessments, management used the criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commission (COSO) in Internal ControlIntegrated Framework.Based on our assessments and those criteria, management
determined that the Company maintained effective internal control over financial reporting as of December 31, 2010.

Audit Report of
the Independent Registered Public Accounting Firm

KPMG LLP, our independent registered public accounting firm that has
audited our consolidated financial statements included herein, has issued an audit report on our internal control over financial reporting as of December 31, 2010, which report is included under Item 8 of this Annual Report on Form 10-K.



|Item 9B. | Other Information
|-------- | -----------------

None



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PART III



|Item 10. | Directors, Executive Officers and Corporate Governance.
|-------- | -------------------------------------------------------

The information required by this item will be set forth in the Proxy Statement and is incorporated in this report by reference.



|Item 11. | Executive Compensation.
|-------- | -----------------------

The information
required by this item will be set forth in the Proxy Statement and is incorporated in this report by reference.



|Item 12. | Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters.
|-------- | -----------------------------------------------------------------------------------------------

The information required by this item will be set forth in the Proxy Statement and is incorporated in this report by reference.



|Item 13. | Certain Relationships and Related Transactions, and Director Independence.
|-------- | --------------------------------------------------------------------------

The information required by this item will be set forth in the Proxy Statement and is incorporated in this report by reference.



|Item 14. | Principal Accounting Fees and Services.
|-------- | ---------------------------------------

The information required by this item will be set forth in the Proxy Statement and is incorporated in this report by reference.



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PART IV



|Item 15. | Exhibits, Financial Statement Schedules.
|-------- | ----------------------------------------



| | (a) | Index of Financial Statements:
| | --- | ------------------------------



| | (1) | The financial statements required by Item 15(a) are filed in Item 8 of this Annual Report on Form 10-K.
| | --- | -------------------------------------------------------------------------------------------------------



| | (2) | Schedules required by Item 15(a) are omitted because they are not required, are not applicable or the information is included in the consolidated financial
statements or notes thereto.
| | --- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (b) | Index of Exhibits:
| | --- | ------------------



|              |  |                                                                                                                                                                                                                                                                                                                                                                                             
|------------- |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|ExhibitNumber |  | Description                                                                                                                                                                                                                                                                                                                                                                                 
|              | 
|2.1           |  | Asset Purchase Agreement, dated July 10, 2003, by and among Jomed Inc., Jomed N.V., Jomed GmbH, Jomed Benelux S.A. and the Registrant (filed as Exhibit 2.1 to the
Registrants Registration Statement on Form S-1, as amended (File No. 333-132678), as originally filed on March 24, 2006, and incorporated herein by reference).                                                         
|              | 
|2.2          |  | Asset Transfer Agreement, dated July 3, 2003, by and between Pacific Rim Medical Ventures Corp and Koninklijke Philips Electronics N.V. (filed as Exhibit 2.2 to the
Registrants Registration Statement on Form S-1, as amended (File No. 333-132678), as originally filed on March 24, 2006, and incorporated herein by reference).                                                       
|              | 
|2.3           |  | Agreement and Plan of Merger, dated December 7, 2007, by and among the Registrant, Corazon Acquisition, Inc., CardioSpectra, Inc. and Christopher E. Banas and Paul Castella, as
the Shareholders Representatives (filed as Exhibit 2.1 to the Registrants Current Report on Form 8-K/A (File No. 000-52045), as originally filed on March 4, 2008, and incorporated herein by
reference).
|              | 
|2.4           |  | Agreement and Plan of Merger, dated as of May 14, 2008, by and among Volcano Corporation, Lava Merger, Inc., Novelis Inc. and Paul Magnin (filed as Exhibit 2.1 to the
Registrants Current Report on Form 8-K (File No. 000-52045), as originally filed on May 19, 2008, and incorporated herein by reference).                                                                            
|              | 
|2.5           |  | Agreement and Plan of Merger, dated as of December 22, 2008, by and among Volcano Corporation, Hummingbird Merger, Inc., Axsun Technologies, Inc. and William Seifert (filed as
Exhibit 2.5 to the Registrants Annual Report on Form 10-K (000-52045), as originally filed on March 10, 2009, and incorporated herein by reference).                                                       
|              | 
|3.1           |  | Amended and Restated Certificate of Incorporation of the Registrant (filed as Exhibit 3.1 to the Registrants Quarterly Report on Form 10-Q (File No. 000-52045),
as originally filed on August 9, 2006, and incorporated herein by reference).                                                                                                                                             
|              | 
|3.2           |  | Bylaws of the Registrant, as revised (filed as Exhibit 3.1 to the Registrants Current Report on Form 8-K (File No. 000-52045), as originally filed on February
7, 2011, and incorporated herein by reference).                                                                                                                                                                             
|              | 
|3.3           |  | Certificate of Designation of Series A Junior Participating Preferred Stock (filed as Exhibit 3.2 to the Registrants Quarterly Report on Form 10-Q (File
No. 000-52045), as originally filed on August 9, 2006, and incorporated herein by reference).                                                                                                                                     
|              | 
|4.1           |  | Reference is made to Exhibits 3.1, 3.2 and 3.3.                                                                                                                                                                                                                                                                                                                                             
|              | 
|4.2           |  | Specimen Common Stock certificate of the Registrant (filed as Exhibit 4.1 to the Registrants Registration Statement on Form S-1/A, as amended (File
No. 333-132678), as originally filed on May 24, 2006, and incorporated herein by reference).                                                                                                                                           



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|              |  |                                                                                                                                                                                                                                                                                                                                                                             
|------------- |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|ExhibitNumber |  | Description                                                                                                                                                                                                                                                                                                                                                                 
|              | 
|4.3           |  | Fourth Amended and Restated Investor Rights Agreement, dated February 18, 2005, by and among the Registrant and certain stockholders (filed as Exhibit 4.2 to the
Registrants Registration Statement on Form S-1, as amended (File No. 333-132678), as originally filed on March 24, 2006, and incorporated herein by reference).                                          
|              | 
|4.4           |  | Rights Agreement, dated June 20, 2006, by and between the Registrant and American Stock Transfer & Trust Company (filed as Exhibit 4.1 to the Registrants
Quarterly Report on Form 10-Q (File No. 000-52045), as originally filed on August 9, 2006, and incorporated herein by reference).                                                                                
|              | 
|4.5           |  | Indenture, dated September 20, 2010, by and between the Registrant and Wells Fargo Bank (filed as Exhibit 4.1 to the Registrants Current Report on Form 8-K (File
No. 000-52045), as originally filed on September 20, 2010, and incorporated herein by reference).                                                                                                        
|              | 
|4.6           |  | Supplemental Indenture, dated September 20, 2010 by and between Registrant and Wells Fargo Bank, N.A. (filed as Exhibit 4.2 to the Registrants Current Report on Form 8-K (File
No. 000-52045), as originally filed on September 20 2010, and incorporated herein by reference).                                                                                           
|              | 
|4.7           |  | From of 2.875% Convertible Senior Notes due 2015 (filed as Exhibit 4.3 to the Registrants Current Report on Form 8-K (File No. 000-52045), as originally filed on September 20,
2010, and incorporated herein by reference).                                                                                                                                               
|              | 
|10.1*         |  | Form of Indemnification Agreement for directors and executive officers (filed as Exhibit 10.1 to the Registrants Registration Statement on Form S-1, as amended (File
No. 333-132678), as originally filed on March 24, 2006, and incorporated herein by reference).                                                                                                       
|              | 
|10.2*         |  | 2000 Long Term Incentive Plan and forms of Stock Option Agreements thereunder (filed as Exhibit 10.2 to the Registrants Registration Statement on Form S-1/A, as
amended (File No. 333-132678), as originally filed on May 5, 2006, and incorporated herein by reference).                                                                                                 
|              | 
|10.3*         |  | Amended and Restated 2005 Equity Compensation Plan (filed as Appendix A to the Registrants Definitive Proxy Statement on Form DEF 14A, as originally filed on June 2, 2009, and
incorporated herein by reference).                                                                                                                                                         
|              | 
|10.3a*        |  | 2005 Equity Compensation Plan Forms of Stock Option Agreements and Stock Grant Agreement thereunder (forms filed as Exhibit 10.3 to the Registrants Registration Statement
on Form S-1/A, as amended (File No. 333-132678), as originally filed on May 5, 2006, and incorporated herein by reference).                                                                     
|              | 
|10.3b*        |  | 2005 Equity Compensation Plan Form of Grantee Restriction Agreement (filed as Exhibit 10.3a to the Registrants Annual Report on Form 10-K, as amended (File
No. 000-52045), as originally filed on March 23, 2007, as amended, and incorporated herein by reference).                                                                                                      
|              | 
|10.3c*        |  | Amended and Restated 2005 Equity Compensation Plan Form of Restricted Stock Unit Grant Notice and Form of Restricted Stock Unit Agreement (filed as Exhibit 10.2 to the
Registrants Current Report on Form 8-K (File No. 000-52045), as originally filed on February 11, 2010, and incorporated herein by reference).                                                      
|              | 
|10.3d*        |  | Amended and Restated 2005 Equity Compensation Plan Form of Stock Option Agreement (filed as Exhibit 10.3 to the Registrants Current Report on Form 8-K (File
No. 000-52045), as originally filed on February 11, 2010, and incorporated herein by reference).                                                                                                              
|              | 
|10.3e*        |  | Form of Restricted Stock Unit Grant Notice and Form of Restricted Stock Unit Agreement with deferred delivery under the Volcano Corporation 2005 Equity Compensation Plan, as amended
and restated (filed as Exhibit 10.2 to the Registrants Quarterly Report on Form 10-Q (File No. 000-52045), as originally filed on May 7, 2010, and incorporated herein by reference).
|              | 
|10.4*         |  | 2007 Employee Stock Purchase Plan (filed as Exhibit 99.2 to the Registrants Registration Statement on Form S-8 (File No. 333-145761), filed with the SEC on August 29,
2007, and incorporated herein by reference).                                                                                                                                                        



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|              |  |                                                                                                                                                                                                                                                                                                                          
|------------- |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|ExhibitNumber |  | Description                                                                                                                                                                                                                                                                                                              
|              | 
|10.5         |  | License Agreement by and between the Registrant and The Cleveland Clinic Foundation, dated April 30, 2002 (filed as Exhibit 10.15 to the Registrants Registration
Statement on Form S-1, as amended (File No. 333-132678), as originally filed on March 24, 2006, and incorporated herein by reference).                
|              | 
|10.6*         |  | Amended and Restated Employment Agreement by and between the Registrant and R. Scott Huennekens, dated February 28, 2008 (filed as Exhibit 10.1 to the Registrants
Current Report on Form 8-K (File No. 000-52045), as originally filed on March 4, 2008, and incorporated herein by reference).                        
|              | 
|10.7*         |  | Employment Agreement by and between the Registrant and Jorge J. Quinoy, dated December 10, 2008 (filed as Exhibit 10.1 to the Registrants Current Report on Form 8-K
(File No. 000-52045), as originally filed on December 12, 2008, and incorporated herein by reference).                                             
|              | 
|10.8*         |  | Amended and Restated Employment Agreement by and between the Registrant and John T. Dahldorf, dated February 28, 2008 (filed as Exhibit 10.2 to the Registrants
Current Report on Form 8-K (File No. 000-52045), as originally filed on March 4, 2008, and incorporated herein by reference).                           
|              | 
|10.9*         |  | 2010 Commission Plan between the Registrant and Jorge Quinoy.                                                                                                                                                                                                                                                            
|              | 
|10.10*        |  | Managing Director Agreement, dated March 20, 2006, by and between Volcano Europe NV and Michel Lussier (filed as Exhibit 10.30 to the Registrants Registration
Statement on Form S-1, as amended (File No. 333-132678), as originally filed on March 24, 2006, and incorporated herein by reference).                   
|              | 
|10.11*        |  | Addendum to Managing Director Agreement, dated February 4, 2011, by and between Volcano Europe NV and Michel Lussier.                                                                                                                                                                                                    
|              | 
|10.12*        |  | Employment Agreement, dated February 4, 2011, by and between the Registrant and Michel Lussier.                                                                                                                                                                                                                          
|              | 
|10.13*        |  | Employment Agreement, dated August 1, 2010, by and between the Registrant and Darin Lippoldt.                                                                                                                                                                                                                            
|              | 
|10.14*        |  | Employment Offer Letter, dated June 23, 2008, by and between the Registrant and David Sheehan.                                                                                                                                                                                                                           
|              | 
|10.15*        |  | Employment Agreement by and between the Registrant and Vincent Burgess, dated February 10, 2010 (filed as Exhibit 10.4 to the Registrants Current Report on Form 8-K
(File No. 000-52045), as originally filed on February 11, 2010, and incorporated herein by reference).                                             
|              | 
|10.16*        |  | Severance Agreement and Release between the Registrant and Vincent Burgess, dated March 5, 2010 (filed as Exhibit 10.29 to the Registrants Annual Report on Form 10-K
(File No. 000-52045), as originally filed on March 5, 2010, and incorporated herein by reference).                                                
|              | 
|10.17         |  | Standard Multi-Tenant Office LeaseGross, dated June 13, 2005, by and between Ethan Conrad and the Registrant, as amended (filed as Exhibit 10.18 to the
Registrants Registration Statement on Form S-1, as amended (File No. 333-132678), as originally filed on March 24, 2006, and incorporated herein by reference).
|              | 
|10.18         |  | Third Amendment to Standard Multi-Tenant Office LeaseGross, dated June 13, 2005, by and between Ethan Conrad and the Registrant, dated December 24, 2008.                                                                                                                                                               
|              | 
|10.19         |  | Termination Agreement, dated September 22, 2010, by and among the Registrant, Volcano Japan Co., Ltd. and Fukuda Denshi Co., Ltd.                                                                                                                                                                                        
|              | 
|10.20        |  | Supply Agreement, dated July 21, 2003, by and between the Registrant and AVE Galway Limited (filed as Exhibit 10.21 to the Registrants Registration Statement on
Form S-1, as amended (File No. 333-132678), as originally filed on March 24, 2006, and incorporated herein by reference).                              
|              | 
|10.21         |  | License Agreement, dated July 21, 2003, by and between the Registrant and AVE Galway Limited (filed as Exhibit 10.22 to the Registrants Registration Statement on
Form S-1, as amended (File No. 333-132678), as originally filed on March 24, 2006, and incorporated herein by reference).                             



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|              |  |                                                                                                                                                                                                                                                                                                                                                                                                              
|------------- |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|ExhibitNumber |  | Description                                                                                                                                                                                                                                                                                                                                                                                                  
|              | 
|10.22         |  | Termination Agreement, dated May 19, 2008, between the Registrant and Goodman Company, Ltd. (filed as Exhibit 10.2 to the Registrants Quarterly Report on Form 10-Q
(File No. 000-52045), as originally filed on August 7, 2008, and incorporated herein by reference).                                                                                                                                     
|              | 
|10.23        |  | Supply and Distribution Agreement, dated March 16, 2006, between General Electric Medical Systems Scs and the Registrant (filed as Exhibit 10.28 to the Registrants
Registration Statement on Form S-1, as amended (File No. 333-132678), as originally filed on March 24, 2006, and incorporated herein by reference).                                                                                     
|              | 
|10.24        |  | Termination of Option to Distribute Agreement, dated January 27, 2006, by and between Medtronic Vascular, Inc. and the Registrant (filed as Exhibit 10.31 to the
Registrants Registration Statement on Form S-1/A, as amended (File No. 333-132678), as originally filed on May 24, 2006, and incorporated herein by reference).                                                                            
|              | 
|10.25*        |  | Software Development and License Agreement, dated May 10, 2006, by and between Paieon, Inc. and the Registrant (filed as Exhibit 10.32 to the Registrants
Registration Statement on Form S-1/A, as amended (File No. 333-132678), as originally filed on May 24, 2006, and incorporated herein by reference).                                                                                               
|              | 
|10.26*        |  | Manufacturing Services Agreement, dated July 14, 2006, by and between Volcano Corporation and Endicott Interconnect Technologies, Inc. (filed as Exhibit 10.3 to the
Registrants Quarterly Report on Form 10-Q (File No. 000-52045), as originally filed on August 9, 2006, and incorporated herein by reference).                                                                                          
|              | 
|10.27*        |  | Director Compensation Policy, as revised by the Registrant on May 5, 2010 (filed Exhibit 10.3 to the Registrants Quarterly Report on Form 10-Q (File No. 000-52045), as
originally filed on May 7, 2010, and incorporated herein by reference).                                                                                                                                                             
|              | 
|10.28*        |  | 2010 Executive Compensation (filed as Exhibit 10.1 to the Registrants Quarterly Report on Form 10-Q (File No. 000-52045), as originally filed on May 7, 2010, and
incorporated herein by reference).                                                                                                                                                                                                        
|              | 
|10.29         |  | Sublease Agreement, dated February 12, 2009, by and between the Registrant and Fair Isaac Corporation (filed as Exhibit 10.2 to the Registrants Quarterly Report on
Form 10-Q (File No. 000-52045), as originally filed on May 7, 2009, and incorporated herein by reference).                                                                                                                              
|              | 
|10.30         |  | Distributor Termination Agreement, dated July 8, 2009, by and between Volcano Corporation, Volcano Japan Co., Ltd. and Goodman Company, Ltd. (filed as Exhibit 10.1 to the
Registrants Current Report on Form 8-K (File No. 000-52045), as originally filed on July 8, 2009, and incorporated herein by reference).                                                                                         
|              | 
|10.31         |  | Office Lease, dated December 28, 2009, by and between the Registrant and Kilroy Realty, L.P. (filed as Exhibit 10.26 to the Registrants Annual Report on Form 10-K (File No.
000-52045), as originally filed on March 5, 2010, and incorporated herein by reference).                                                                                                                                       
|              | 
|10.32         |  | Assignment and Assumption of Sublease, and Consent to Assignment and Assumption of Sublease, dated December 28, 2009, by and between the Registrant and Fair Isaac Corporation (filed
as Exhibit 10.27 to the Registrants Annual Report on Form 10-K (File No. 000-52045), as originally filed on March 5, 2010, and incorporated herein by reference).                                                     
|              | 
|10.33         |  | Trust, Land Purchase and Right of First Refusal Agreement by and among Volcarica, Socieded de Responsabilidad Limitada, Zona Franca Coyol, Sociedad Anonima and Banco Improsa,
Sociedad Anonima, dated as of September 23, 2010 (filed as Exhibit 10.4 to the Registrants Current Report on Form 8-K (File No. 000-52045), as originally filed on September 29, 2010, and incorporated herein by reference).
|              | 
|10.34         |  | Fixed Price Building Construction Agreement for Phase One by and between Volcarica, Socieded de Responsabilidad Limitada and Zona Franca Coyol, Sociedad Anonima, dated as of
September 23, 2010 (filed as Exhibit 10.5 to the Registrants Current Report on Form 8-K (File No. 000-52045), as originally filed on September 29, 2010, and incorporated herein by
reference).                               



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|              |  |                                                                                                                                                                                                                                                                                                                                                                                            
|------------- |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|ExhibitNumber |  | Description                                                                                                                                                                                                                                                                                                                                                                                
|              | 
|10.35         |  | Design, Architecture, Engineering and Construction Management Contract by and between Volcarica, Socieded de Responsabilidad Limitada and Zona Franca Coyol, Sociedad Anonima, dated
as of September 23, 2010 (filed as Exhibit 10.6 to the Registrants Current Report on Form 8-K (File No. 000-52045), as originally filed on September 29, 2010, and incorporated herein by reference).
|              | 
|10.36         |  | Base Call Option Transaction Confirmation, dated September 14, 2010, between Volcano Corporation and JPMorgan Chase Bank, National Association, London Branch (filed as Exhibit 10.4
to the Registrants Current Report on Form 8-K (File No. 000-52045), as originally filed on September 15, 2010, and incorporated herein by reference).                                                
|              | 
|10.37         |  | Base Warrants Confirmation, dated September 14, 2010, between Volcano Corporation and JPMorgan Chase Bank, National Association, London Branch (filed as Exhibit 10.5 to the
Registrants Current Report on Form 8-K (File No. 000-52045), as originally filed on September 15, 2010, and incorporated herein by reference).                                                               
|              | 
|10.38         |  | Additional Call Option Transaction Confirmation, dated September 16, 2010, between Volcano Corporation and JPMorgan Chase Bank, National Association, London Branch (filed as Exhibit
10.6 to the Registrants Current Report on Form 8-K (File No. 000-52045), as originally filed on September 20, 2010, and incorporated herein by reference).                                          
|              | 
|10.39         |  | Additional Warrants Confirmation, dated September 16, 2010, between Volcano Corporation and JPMorgan Chase Bank, National Association, London Branch (filed as Exhibit 10.7 to the
Registrants Current Report on Form 8-K (File No. 000-52045), as originally filed on September 20, 2010, and incorporated herein by reference).                                                         
|              | 
|12.1          |  | Ratio of earnings to fixed charges.                                                                                                                                                                                                                                                                                                                                                        
|              | 
|21.1          |  | Subsidiaries of the Registrant.                                                                                                                                                                                                                                                                                                                                                            
|              | 
|23.1          |  | Consent of Independent Registered Public Accounting Firm.                                                                                                                                                                                                                                                                                                                                  
|              | 
|23.2          |  | Consent of Independent Registered Public Accounting Firm.                                                                                                                                                                                                                                                                                                                                  
|              | 
|24.1          |  | Power of Attorney (See signature pages hereto).                                                                                                                                                                                                                                                                                                                                            
|              | 
|31.1          |  | Certification of the President & Chief Executive Officer pursuant to Rule 13a-14(a)/15d-14(a) of the Securities Exchange Act of 1934.                                                                                                                                                                                                                                                      
|              | 
|31.2          |  | Certification of the Chief Financial Officer pursuant to Rule 13a-14(a)/15d-14(a) of the Securities Exchange Act of 1934.                                                                                                                                                                                                                                                                  
|              | 
|32.1**        |  | Certification of the President & Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of
2002.                                                                                                                                                                                                                         
|              | 
|32.2**        |  | Certification of the Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of
2002.                                                                                                                                                                                                                                     



| | Portions of the exhibit have been omitted pursuant to a request for confidential treatment. The confidential portions have been filed with the SEC.
|- | ---------------------------------------------------------------------------------------------------------------------------------------------------

|* | Management contract or compensatory plan or arrangement.
|- | --------------------------------------------------------

|** | The certifications attached as Exhibits 32.1 and 32.2 accompany this annual report on Form 10-K pursuant to 18 U.S.C. Section 1350, as adopted pursuant to
Section 906 of the Sarbanes-Oxley Act of 2002, and shall not be deemed filed by the Registrant for purposes of Section 18 of the Securities Exchange Act of 1934, as amended.
|-- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this
report to be signed on its behalf by the undersigned, thereunto duly authorized, on this 28th day of February 2011.



Volcano CorporationBy:

/s/    R. SCOTT
HUENNEKENSR. Scott HuennekensPresident and Chief Executive Officer


POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENTS, that each person
whose signature appears below constitutes and appoints R. Scott Huennekens and John T. Dahldorf, and each of them, as his true and lawful attorneys-in-fact and agents, with full power of substitution and resubstitution, for him and in his name,
place, and stead, in any and all capacities, to sign any and all amendments to this report, and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said
attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite and necessary to be done in connection therewith, as fully to all intents and purposes as he might or could do in
person, hereby ratifying and confirming that all said attorneys-in-fact and agents, or any of them or their or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Exchange Act of 1934, this Report on has been signed below by the following persons on
behalf of the registrant and in the capacities and on the dates indicated:



|                                                               |  |                                                                                        |  |                  
|-------------------------------------------------------------- |  | -------------------------------------------------------------------------------------- |  | -----------------
|Signature                                                      |  | Title                                                                                  |  | Date             
|                                                               |  |                                                                                       
|/s/    R. SCOTT
HUENNEKENS R. Scott Huennekens                 |  | President and Chief Executive Officer and Director (principal executive officer)       |  | February 28, 2011
|                                                               |  |                                                                                       
|/s/    JOHN T.
DAHLDORF John T. Dahldorf                       |  | Chief Financial Officer (principal financial officer and principal accounting officer) |  | February 28, 2011
|                                                               |  |                                                                                       
|/s/    MICHAEL J.
COYLE Michael J. Coyle                       |  | Director                                                                               |  | February 28, 2011
|                                                               |  |                                                                                       
|/s/    CONNIE R. CURRAN, RN,
ED.D. Connie R. Curran, RN, Ed.D. |  | Director                                                                               |  | February 28, 2011
|                                                               |  |                                                                                       
|/s/    KIERAN T.
GALLAHUE Kieran T. Gallahue                   |  | Director                                                                               |  | February 28, 2011
|                                                               |  |                                                                                       
|/s/    LESLEY H.
HOWE Lesley H. Howe                           |  | Director                                                                               |  | February 28, 2011
|                                                               |  |                                                                                       
|/s/    ALEXIS V.
LUKIANOV Alexis V. Lukianov                   |  | Director                                                                               |  | February 28, 2011



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|                                                 |  |          |  |                  
|------------------------------------------------ |  | -------- |  | -----------------
|Signature                                        |  | Title    |  | Date             
|                                                 |  |         
|/s/    RONALD A.
MATRICARIA Ronald A. Matricaria |  | Director |  | February 28, 2011
|                                                 |  |         
|/s/    JOHN
ONOPCHENKO John Onopchenko           |  | Director |  | February 28, 2011
|                                                 |  |         
|/s/    ROY T.
TANAKA Roy T. Tanaka               |  | Director |  | February 28, 2011



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EXHIBIT INDEX



|              |  |                                                                                                                                                                                                                                                                                                                                                                                             
|------------- |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|ExhibitNumber |  | Description                                                                                                                                                                                                                                                                                                                                                                                 
|              | 
|2.1           |  | Asset Purchase Agreement, dated July 10, 2003, by and among Jomed Inc., Jomed N.V., Jomed GmbH, Jomed Benelux S.A. and the Registrant (filed as Exhibit 2.1 to the
Registrants Registration Statement on Form S-1, as amended (File No. 333-132678), as originally filed on March 24, 2006, and incorporated herein by reference).                                                         
|              | 
|2.2          |  | Asset Transfer Agreement, dated July 3, 2003, by and between Pacific Rim Medical Ventures Corp and Koninklijke Philips Electronics N.V. (filed as Exhibit 2.2 to the
Registrants Registration Statement on Form S-1, as amended (File No. 333-132678), as originally filed on March 24, 2006, and incorporated herein by reference).                                                       
|              | 
|2.3           |  | Agreement and Plan of Merger, dated December 7, 2007, by and among the Registrant, Corazon Acquisition, Inc., CardioSpectra, Inc. and Christopher E. Banas and Paul Castella, as
the Shareholders Representatives (filed as Exhibit 2.1 to the Registrants Current Report on Form 8-K/A (File No. 000-52045), as originally filed on March 4, 2008, and incorporated herein by
reference).
|              | 
|2.4           |  | Agreement and Plan of Merger, dated as of May 14, 2008, by and among Volcano Corporation, Lava Merger, Inc., Novelis Inc. and Paul Magnin (filed as Exhibit 2.1 to the
Registrants Current Report on Form 8-K (File No. 000-52045), as originally filed on May 19, 2008, and incorporated herein by reference).                                                                            
|              | 
|2.5           |  | Agreement and Plan of Merger, dated as of December 22, 2008, by and among Volcano Corporation, Hummingbird Merger, Inc., Axsun Technologies, Inc. and William Seifert (filed as
Exhibit 2.5 to the Registrants Annual Report on Form 10-K (000-52045), as originally filed on March 10, 2009, and incorporated herein by reference).                                                       
|              | 
|3.1           |  | Amended and Restated Certificate of Incorporation of the Registrant (filed as Exhibit 3.1 to the Registrants Quarterly Report on Form 10-Q (File No. 000-52045),
as originally filed on August 9, 2006, and incorporated herein by reference).                                                                                                                                             
|              | 
|3.2           |  | Bylaws of the Registrant, as revised (filed as Exhibit 3.1 to the Registrants Current Report on Form 8-K (File No. 000-52045), as originally filed on February
7, 2011, and incorporated herein by reference).                                                                                                                                                                             
|              | 
|3.3           |  | Certificate of Designation of Series A Junior Participating Preferred Stock (filed as Exhibit 3.2 to the Registrants Quarterly Report on Form 10-Q (File
No. 000-52045), as originally filed on August 9, 2006, and incorporated herein by reference).                                                                                                                                     
|              | 
|4.1           |  | Reference is made to Exhibits 3.1, 3.2 and 3.3.                                                                                                                                                                                                                                                                                                                                             
|              | 
|4.2           |  | Specimen Common Stock certificate of the Registrant (filed as Exhibit 4.1 to the Registrants Registration Statement on Form S-1/A, as amended (File
No. 333-132678), as originally filed on May 24, 2006, and incorporated herein by reference).                                                                                                                                           
|              | 
|4.3           |  | Fourth Amended and Restated Investor Rights Agreement, dated February 18, 2005, by and among the Registrant and certain stockholders (filed as Exhibit 4.2 to the
Registrants Registration Statement on Form S-1, as amended (File No. 333-132678), as originally filed on March 24, 2006, and incorporated herein by reference).                                                          
|              | 
|4.4           |  | Rights Agreement, dated June 20, 2006, by and between the Registrant and American Stock Transfer & Trust Company (filed as Exhibit 4.1 to the Registrants
Quarterly Report on Form 10-Q (File No. 000-52045), as originally filed on August 9, 2006, and incorporated herein by reference).                                                                                                
|              | 
|4.5           |  | Indenture, dated September 20, 2010, by and between the Registrant and Wells Fargo Bank (filed as Exhibit 4.1 to the Registrants Current Report on Form 8-K (File
No. 000-52045), as originally filed on September 20, 2010, and incorporated herein by reference).                                                                                                                        



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|              |  |                                                                                                                                                                                                                                                                                                                                                                             
|------------- |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|ExhibitNumber |  | Description                                                                                                                                                                                                                                                                                                                                                                 
|              | 
|4.6           |  | Supplemental Indenture, dated September 20, 2010 by and between Registrant and Wells Fargo Bank, N.A. (filed as Exhibit 4.2 to the Registrants Current Report on Form 8-K (File
No. 000-52045), as originally filed on September 20 2010, and incorporated herein by reference).                                                                                           
|              | 
|4.7           |  | From of 2.875% Convertible Senior Notes due 2015 (filed as Exhibit 4.3 to the Registrants Current Report on Form 8-K (File No. 000-52045), as originally filed on September 20,
2010, and incorporated herein by reference).                                                                                                                                               
|              | 
|10.1*         |  | Form of Indemnification Agreement for directors and executive officers (filed as Exhibit 10.1 to the Registrants Registration Statement on Form S-1, as amended (File
No. 333-132678), as originally filed on March 24, 2006, and incorporated herein by reference).                                                                                                       
|              | 
|10.2*         |  | 2000 Long Term Incentive Plan and forms of Stock Option Agreements thereunder (filed as Exhibit 10.2 to the Registrants Registration Statement on Form S-1/A, as
amended (File No. 333-132678), as originally filed on May 5, 2006, and incorporated herein by reference).                                                                                                 
|              | 
|10.3*         |  | Amended and Restated 2005 Equity Compensation Plan (filed as Appendix A to the Registrants Definitive Proxy Statement on Form DEF 14A, as originally filed on June 2, 2009, and
incorporated herein by reference).                                                                                                                                                         
|              | 
|10.3a*        |  | 2005 Equity Compensation Plan Forms of Stock Option Agreements and Stock Grant Agreement thereunder (forms filed as Exhibit 10.3 to the Registrants Registration Statement
on Form S-1/A, as amended (File No. 333-132678), as originally filed on May 5, 2006, and incorporated herein by reference).                                                                     
|              | 
|10.3b*        |  | 2005 Equity Compensation Plan Form of Grantee Restriction Agreement (filed as Exhibit 10.3a to the Registrants Annual Report on Form 10-K, as amended (File
No. 000-52045), as originally filed on March 23, 2007, as amended, and incorporated herein by reference).                                                                                                      
|              | 
|10.3c*        |  | Amended and Restated 2005 Equity Compensation Plan Form of Restricted Stock Unit Grant Notice and Form of Restricted Stock Unit Agreement (filed as Exhibit 10.2 to the
Registrants Current Report on Form 8-K (File No. 000-52045), as originally filed on February 11, 2010, and incorporated herein by reference).                                                      
|              | 
|10.3d*        |  | Amended and Restated 2005 Equity Compensation Plan Form of Stock Option Agreement (filed as Exhibit 10.3 to the Registrants Current Report on Form 8-K (File
No. 000-52045), as originally filed on February 11, 2010, and incorporated herein by reference).                                                                                                              
|              | 
|10.3e*        |  | Form of Restricted Stock Unit Grant Notice and Form of Restricted Stock Unit Agreement with deferred delivery under the Volcano Corporation 2005 Equity Compensation Plan, as amended
and restated (filed as Exhibit 10.2 to the Registrants Quarterly Report on Form 10-Q (File No. 000-52045), as originally filed on May 7, 2010, and incorporated herein by reference).
|              | 
|10.4*         |  | 2007 Employee Stock Purchase Plan (filed as Exhibit 99.2 to the Registrants Registration Statement on Form S-8 (File No. 333-145761), filed with the SEC on August 29,
2007, and incorporated herein by reference).                                                                                                                                                        
|              | 
|10.5         |  | License Agreement by and between the Registrant and The Cleveland Clinic Foundation, dated April 30, 2002 (filed as Exhibit 10.15 to the Registrants Registration
Statement on Form S-1, as amended (File No. 333-132678), as originally filed on March 24, 2006, and incorporated herein by reference).                                                                   
|              | 
|10.6*         |  | Amended and Restated Employment Agreement by and between the Registrant and R. Scott Huennekens, dated February 28, 2008 (filed as Exhibit 10.1 to the Registrants
Current Report on Form 8-K (File No. 000-52045), as originally filed on March 4, 2008, and incorporated herein by reference).                                                                           



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|              |  |                                                                                                                                                                                                                                                                                                                          
|------------- |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|ExhibitNumber |  | Description                                                                                                                                                                                                                                                                                                              
|              | 
|10.7*         |  | Employment Agreement by and between the Registrant and Jorge J. Quinoy, dated December 10, 2008 (filed as Exhibit 10.1 to the Registrants Current Report on Form 8-K
(File No. 000-52045), as originally filed on December 12, 2008, and incorporated herein by reference).                                             
|              | 
|10.8*         |  | Amended and Restated Employment Agreement by and between the Registrant and John T. Dahldorf, dated February 28, 2008 (filed as Exhibit 10.2 to the Registrants
Current Report on Form 8-K (File No. 000-52045), as originally filed on March 4, 2008, and incorporated herein by reference).                           
|              | 
|10.9*         |  | 2010 Commission Plan between the Registrant and Jorge Quinoy.                                                                                                                                                                                                                                                            
|              | 
|10.10*        |  | Managing Director Agreement, dated March 20, 2006, by and between Volcano Europe NV and Michel Lussier (filed as Exhibit 10.30 to the Registrants Registration
Statement on Form S-1, as amended (File No. 333-132678), as originally filed on March 24, 2006, and incorporated herein by reference).                   
|              | 
|10.11*        |  | Addendum to Managing Director Agreement, dated February 4, 2011, by and between Volcano Europe NV and Michel Lussier.                                                                                                                                                                                                    
|              | 
|10.12*        |  | Employment Agreement, dated February 4, 2011, by and between the Registrant and Michel Lussier.                                                                                                                                                                                                                          
|              | 
|10.13*        |  | Employment Agreement, dated August 1, 2010, by and between the Registrant and Darin Lippoldt.                                                                                                                                                                                                                            
|              | 
|10.14*        |  | Employment Offer Letter, dated June 23, 2008, by and between the Registrant and David Sheehan.                                                                                                                                                                                                                           
|              | 
|10.15*        |  | Employment Agreement by and between the Registrant and Vincent Burgess, dated February 10, 2010 (filed as Exhibit 10.4 to the Registrants Current Report on Form 8-K
(File No. 000-52045), as originally filed on February 11, 2010, and incorporated herein by reference).                                             
|              | 
|10.16*        |  | Severance Agreement and Release between the Registrant and Vincent Burgess, dated March 5, 2010 (filed as Exhibit 10.29 to the Registrants Annual Report on Form 10-K
(File No. 000-52045), as originally filed on March 5, 2010, and incorporated herein by reference).                                                
|              | 
|10.17         |  | Standard Multi-Tenant Office LeaseGross, dated June 13, 2005, by and between Ethan Conrad and the Registrant, as amended (filed as Exhibit 10.18 to the
Registrants Registration Statement on Form S-1, as amended (File No. 333-132678), as originally filed on March 24, 2006, and incorporated herein by reference).
|              | 
|10.18         |  | Third Amendment to Standard Multi-Tenant Office LeaseGross, dated June 13, 2005, by and between Ethan Conrad and the Registrant, dated December 24, 2008.                                                                                                                                                               
|              | 
|10.19         |  | Termination Agreement, dated September 22, 2010, by and among the Registrant, Volcano Japan Co., Ltd. and Fukuda Denshi Co., Ltd.                                                                                                                                                                                        
|              | 
|10.20        |  | Supply Agreement, dated July 21, 2003, by and between the Registrant and AVE Galway Limited (filed as Exhibit 10.21 to the Registrants Registration Statement on
Form S-1, as amended (File No. 333-132678), as originally filed on March 24, 2006, and incorporated herein by reference).                              
|              | 
|10.21         |  | License Agreement, dated July 21, 2003, by and between the Registrant and AVE Galway Limited (filed as Exhibit 10.22 to the Registrants Registration Statement on
Form S-1, as amended (File No. 333-132678), as originally filed on March 24, 2006, and incorporated herein by reference).                             
|              | 
|10.22         |  | Termination Agreement, dated May 19, 2008, between the Registrant and Goodman Company, Ltd. (filed as Exhibit 10.2 to the Registrants Quarterly Report on Form 10-Q
(File No. 000-52045), as originally filed on August 7, 2008, and incorporated herein by reference).                                                 
|              | 
|10.23        |  | Supply and Distribution Agreement, dated March 16, 2006, between General Electric Medical Systems Scs and the Registrant (filed as Exhibit 10.28 to the Registrants
Registration Statement on Form S-1, as amended (File No. 333-132678), as originally filed on March 24, 2006, and incorporated herein by reference). 



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|              |  |                                                                                                                                                                                                                                                                                                                                                                                                              
|------------- |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|ExhibitNumber |  | Description                                                                                                                                                                                                                                                                                                                                                                                                  
|              | 
|10.24        |  | Termination of Option to Distribute Agreement, dated January 27, 2006, by and between Medtronic Vascular, Inc. and the Registrant (filed as Exhibit 10.31 to the
Registrants Registration Statement on Form S-1/A, as amended (File No. 333-132678), as originally filed on May 24, 2006, and incorporated herein by reference).                                                                            
|              | 
|10.25*        |  | Software Development and License Agreement, dated May 10, 2006, by and between Paieon, Inc. and the Registrant (filed as Exhibit 10.32 to the Registrants
Registration Statement on Form S-1/A, as amended (File No. 333-132678), as originally filed on May 24, 2006, and incorporated herein by reference).                                                                                               
|              | 
|10.26*        |  | Manufacturing Services Agreement, dated July 14, 2006, by and between Volcano Corporation and Endicott Interconnect Technologies, Inc. (filed as Exhibit 10.3 to the
Registrants Quarterly Report on Form 10-Q (File No. 000-52045), as originally filed on August 9, 2006, and incorporated herein by reference).                                                                                          
|              | 
|10.27*        |  | Director Compensation Policy, as revised by the Registrant on May 5, 2010 (filed Exhibit 10.3 to the Registrants Quarterly Report on Form 10-Q (File No. 000-52045), as
originally filed on May 7, 2010, and incorporated herein by reference).                                                                                                                                                             
|              | 
|10.28*        |  | 2010 Executive Compensation (filed as Exhibit 10.1 to the Registrants Quarterly Report on Form 10-Q (File No. 000-52045), as originally filed on May 7, 2010, and
incorporated herein by reference).                                                                                                                                                                                                        
|              | 
|10.29         |  | Sublease Agreement, dated February 12, 2009, by and between the Registrant and Fair Isaac Corporation (filed as Exhibit 10.2 to the Registrants Quarterly Report on
Form 10-Q (File No. 000-52045), as originally filed on May 7, 2009, and incorporated herein by reference).                                                                                                                              
|              | 
|10.30         |  | Distributor Termination Agreement, dated July 8, 2009, by and between Volcano Corporation, Volcano Japan Co., Ltd. and Goodman Company, Ltd. (filed as Exhibit 10.1 to the
Registrants Current Report on Form 8-K (File No. 000-52045), as originally filed on July 8, 2009, and incorporated herein by reference).                                                                                         
|              | 
|10.31         |  | Office Lease, dated December 28, 2009, by and between the Registrant and Kilroy Realty, L.P. (filed as Exhibit 10.26 to the Registrants Annual Report on Form 10-K (File No.
000-52045), as originally filed on March 5, 2010, and incorporated herein by reference).                                                                                                                                       
|              | 
|10.32         |  | Assignment and Assumption of Sublease, and Consent to Assignment and Assumption of Sublease, dated December 28, 2009, by and between the Registrant and Fair Isaac Corporation (filed
as Exhibit 10.27 to the Registrants Annual Report on Form 10-K (File No. 000-52045), as originally filed on March 5, 2010, and incorporated herein by reference).                                                     
|              | 
|10.33         |  | Trust, Land Purchase and Right of First Refusal Agreement by and among Volcarica, Socieded de Responsabilidad Limitada, Zona Franca Coyol, Sociedad Anonima and Banco Improsa,
Sociedad Anonima, dated as of September 23, 2010 (filed as Exhibit 10.4 to the Registrants Current Report on Form 8-K (File No. 000-52045), as originally filed on September 29, 2010, and incorporated herein by reference).
|              | 
|10.34         |  | Fixed Price Building Construction Agreement for Phase One by and between Volcarica, Socieded de Responsabilidad Limitada and Zona Franca Coyol, Sociedad Anonima, dated as of
September 23, 2010 (filed as Exhibit 10.5 to the Registrants Current Report on Form 8-K (File No. 000-52045), as originally filed on September 29, 2010, and incorporated herein by reference).                               
|              | 
|10.35         |  | Design, Architecture, Engineering and Construction Management Contract by and between Volcarica, Socieded de Responsabilidad Limitada and Zona Franca Coyol, Sociedad Anonima, dated
as of September 23, 2010 (filed as Exhibit 10.6 to the Registrants Current Report on Form 8-K (File No. 000-52045), as originally filed on September 29, 2010, and incorporated herein by
reference).                  



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##### Table of Contents

|              |  |                                                                                                                                                                                                                                                                                                                                                  
|------------- |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|ExhibitNumber |  | Description                                                                                                                                                                                                                                                                                                                                      
|              | 
|10.36         |  | Base Call Option Transaction Confirmation, dated September 14, 2010, between Volcano Corporation and JPMorgan Chase Bank, National Association, London Branch (filed as Exhibit 10.4
to the Registrants Current Report on Form 8-K (File No. 000-52045), as originally filed on September 15, 2010, and incorporated herein by reference).      
|              | 
|10.37         |  | Base Warrants Confirmation, dated September 14, 2010, between Volcano Corporation and JPMorgan Chase Bank, National Association, London Branch (filed as Exhibit 10.5 to the
Registrants Current Report on Form 8-K (File No. 000-52045), as originally filed on September 15, 2010, and incorporated herein by reference).                     
|              | 
|10.38         |  | Additional Call Option Transaction Confirmation, dated September 16, 2010, between Volcano Corporation and JPMorgan Chase Bank, National Association, London Branch (filed as Exhibit
10.6 to the Registrants Current Report on Form 8-K (File No. 000-52045), as originally filed on September 20, 2010, and incorporated herein by reference).
|              | 
|10.39         |  | Additional Warrants Confirmation, dated September 16, 2010, between Volcano Corporation and JPMorgan Chase Bank, National Association, London Branch (filed as Exhibit 10.7 to the
Registrants Current Report on Form 8-K (File No. 000-52045), as originally filed on September 20, 2010, and incorporated herein by reference).               
|              | 
|12.1          |  | Ratio of earnings to fixed charges.                                                                                                                                                                                                                                                                                                              
|              | 
|21.1          |  | Subsidiaries of the Registrant.                                                                                                                                                                                                                                                                                                                  
|              | 
|23.1          |  | Consent of Independent Registered Public Accounting Firm.                                                                                                                                                                                                                                                                                        
|              | 
|23.2          |  | Consent of Independent Registered Public Accounting Firm.                                                                                                                                                                                                                                                                                        
|              | 
|24.1          |  | Power of Attorney (See signature pages hereto).                                                                                                                                                                                                                                                                                                  
|              | 
|31.1          |  | Certification of the President & Chief Executive Officer pursuant to Rule 13a-14(a)/15d-14(a) of the Securities Exchange Act of 1934.                                                                                                                                                                                                            
|              | 
|31.2          |  | Certification of the Chief Financial Officer pursuant to Rule 13a-14(a)/15d-14(a) of the Securities Exchange Act of 1934.                                                                                                                                                                                                                        
|              | 
|32.1**        |  | Certification of the President & Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of
2002.                                                                                                                                                                               
|              | 
|32.2**        |  | Certification of the Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of
2002.                                                                                                                                                                                           



| | Portions of the exhibit have been omitted pursuant to a request for confidential treatment. The confidential portions have been filed with the SEC.
|- | ---------------------------------------------------------------------------------------------------------------------------------------------------

|* | Management contract or compensatory plan or arrangement.
|- | --------------------------------------------------------

|** | The certifications attached as Exhibits 32.1 and 32.2 accompany this annual report on Form 10-K pursuant to 18 U.S.C. Section 1350, as adopted pursuant to
Section 906 of the Sarbanes-Oxley Act of 2002, and shall not be deemed filed by the Registrant for purposes of Section 18 of the Securities Exchange Act of 1934, as amended.
|-- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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