Document:

<PAGE>

EXHIBIT 10.7

                                    GUARANTY

      GUARANTY, dated as of March 31, 2008 made by each of the undersigned
(together with any other Subsidiary (as defined below) of the Company referred
to below that may from time to time become a Guarantor hereunder, each a
"GUARANTOR", and collectively, the "GUARANTORS"), in favor of Castlerigg Master
Investment Ltd., a company organized under the laws of the British Virgin
Islands, in its capacity as collateral agent (in such capacity, the "COLLATERAL
AGENT") for the "Buyers" (as defined below) party to the Securities Purchase
Agreements referred to below.

                              W I T N E S S E T H :
                              - - - - - - - - - -

      WHEREAS, Raptor Networks Technology, Inc., a Colorado corporation (the
"Company") and each party listed as a "Buyer" on the Schedule of Buyers attached
to the 2007 Securities Purchase Agreement referred to below (collectively, the
"2007 Buyers") are parties to A Securities Purchase Agreement, dated as of July
31, 2007 (as amended, restated, supplemented or otherwise modified from time to
time, the "2007 SECURITIES PURCHASE AGREEMENT") pursuant to which the Company
has sold, and the 2007 Buyers have purchased, the NOTES issued pursuant thereto
(as such notes may be amended, restated, replaced or otherwise modified from
time to time in accordance with the terms thereof, collectively, the "2007
NOTES");

      WHEREAS, the Company and each party listed as a "Buyer" on the Schedule of
Buyers attached to the 2008 Securities Purchase Agreement referred to below
(collectively, the "2008 BUYERS" and together with the 2007 Buyers, each a
"BUYER" and collectively, the "BUYERS") are parties to the 2008 Securities
Purchase Agreement, dated as of March 31, 2008 (as amended, restated,
supplemented or otherwise modified from time to time, the "2008 SECURITIES
PURCHASE AGREEMENT" and together with the 2007 Securities Purchase Agreement,
each a "PURCHASE AGREEMENT", and collectively the "PURCHASE AGREEMENTS"),
pursuant to which the Company has sold, and the 2008 Buyers have purchased, the
notes issued pursuant thereto (as such notes may be amended, restated, replaced
or otherwise modified from time to time in accordance with the terms thereof,
collectively, the "2008 NOTES" and together with the 2007 Notes, each a "Note"
and collectively, the "Notes");

      WHEREAS, the Purchase Agreements requires that the Guarantors execute and
deliver to the Collateral Agent, (i) a guaranty guaranteeing all of the
obligations of the Company under the Purchase Agreements, the Notes issued
pursuant thereto and the other "Transaction Documents" (as defined in the
Purchase Agreements, the "TRANSACTION DOCUMENTS "); (ii) a Security Agreement
dated the date hereof granting the Collateral Agent a perfected, first priority
lien on all of the Guarantors' personal property (the "SECURITY AGREEMENT") and
(iii) a Pledge Agreement providing for the pledge to the Collateral Agent, for
the benefit of the Buyers, and the grant to the Collateral Agent, for the
benefit of the Buyers, of a security interest in and lien on all of the
outstanding shares of capital stock of each Subsidiary (as defined in the
Purchase Agreements) (the "PLEDGE AGREEMENT"); and

      WHEREAS, each Guarantor has determined that the execution, delivery and
performance of this Guaranty directly benefits, and is in the best interest of,
such Guarantor;

<PAGE>

      NOW, THEREFORE, in consideration of the premises and the agreements herein
and in order to induce the Buyers to perform under the Purchase Agreements, each
Guarantor hereby agrees with Collateral Agent as follows:

      SECTION 1. Definitions. Reference is hereby made to the Purchase
Agreements and the Notes for a statement of the terms thereof. All capitalized
terms used in this Guaranty, which are defined in the Purchase Agreements or the
Notes and not otherwise defined herein, shall have the same meanings herein as
set forth therein.

      SECTION 2. Guaranty. The Guarantors, jointly and severally, hereby
unconditionally and irrevocably, guaranty the punctual payment, as and when due
and payable, by stated maturity or otherwise, of all Obligations (as defined in
the Security Agreement) of the Company from time to time owing by it in respect
of the Purchase Agreements, the Notes and the other Transaction Documents,
including, without limitation, all interest that accrues after the commencement
of any Insolvency Proceeding (as defined in the Security Agreement) of the
Company or any Guarantor, whether or not the payment of such interest is
unenforceable or is not allowable due to the existence of such Insolvency
Proceeding, and all fees, commissions, expense reimbursements, indemnifications
and all other amounts due or to become due under any of the Transaction
Documents (such obligations, to the extent not paid by the Company, being the
"GUARANTEED OBLIGATIONS"), and agrees to pay any and all expenses (including
reasonable counsel fees and expenses) reasonably incurred by the Collateral
Agent in enforcing any rights under this Guaranty. Without limiting the
generality of the foregoing, each Guarantor's liability hereunder shall extend
to all amounts that constitute part of the Guaranteed Obligations and would be
owed by the Company to the Collateral Agent under the Purchase Agreements and
the Notes but for the fact that they are unenforceable or not allowable due to
the existence of an Insolvency Proceeding involving any Guarantor or the Company
(each, a "TRANSACTION PARTY").

      SECTION 3. Guaranty Absolute; Continuing Guaranty; Assignments.

      (a)   The Guarantors, jointly and severally, guaranty that the Guaranteed
Obligations will be paid strictly in accordance with the terms of the
Transaction Documents, regardless of any law, regulation or order now or
hereafter in effect in any jurisdiction affecting any of such terms or the
rights of the Collateral Agent with respect thereto. The obligations of each
Guarantor under this Guaranty are independent of the Guaranteed Obligations, and
a separate action or actions may be brought and prosecuted against any Guarantor
to enforce such obligations, irrespective of whether any action is brought
against any other Transaction Party or whether any other Transaction Party is
joined in any such action or actions. The liability of any Guarantor under this
Guaranty shall be irrevocable, absolute and unconditional irrespective of, and
each Guarantor hereby irrevocably waives, to the extent permitted by law, any
defenses it may now or hereafter have in any way relating to, any or all of the
following:

            (i)   any lack of validity or enforceability of any Transaction
Document or any agreement or instrument relating thereto;

            (ii)  any change in the time, manner or place of payment of, or in
any other term of, all or any of the Guaranteed Obligations, or any other
amendment or waiver of or any consent to departure from any Transaction
Document, including, without limitation, any increase in the Guaranteed
Obligations resulting from the extension of additional credit to any Transaction
Party or otherwise;

                                      -2-
<PAGE>

            (iii) any taking, exchange, release or non-perfection of any
Collateral (as defined in the Security Agreement), or any taking, release or
amendment or waiver of or consent to departure from any other guaranty, for all
or any of the Guaranteed Obligations;

            (iv)  any change, restructuring or termination of the corporate,
limited liability company or partnership structure or existence of any
Transaction Party; or

            (v)   any other circumstance (including any statute of limitations)
or any existence of or reliance on any representation by the Collateral Agent
that might otherwise constitute a defense available to, or a discharge of, any
Transaction Party or any other guarantor or surety.

This Guaranty shall continue to be effective or be reinstated, as the case may
be, if at any time any payment of any of the Guaranteed Obligations is rescinded
or must otherwise be returned by the Collateral Agent or any other Person upon
the insolvency, bankruptcy or reorganization of any Transaction Party or
otherwise, all as though such payment had not been made.

      (b)   This Guaranty is a continuing guaranty and shall (i) remain in full
force and effect until Satisfaction in Full of the Obligations (as defined in
the Security Agreement, "SATISFACTION IN FULL") and shall not terminate for any
reason prior to the Satisfaction in Full of the Obligations and (ii) be binding
upon each Guarantor and its respective successors and assigns. This Guaranty
shall inure to the benefit of and be enforceable by the Collateral Agent and its
successors, and permitted pledgees, transferees and assigns. Without limiting
the generality of the foregoing sentence, the Collateral Agent or any Buyer may
pledge, assign or otherwise transfer all or any portion of its rights and
obligations under and subject to the terms of any Transaction Document to any
other Person, and such other Person shall thereupon become vested with all the
benefits in respect thereof granted to such Collateral Agent or Buyer herein or
otherwise, in each case as such pledge, assignment or transfer is permitted
pursuant to the applicable Transaction Document. Notwithstanding the foregoing
and for the avoidance of doubt, this Guaranty will expire and each Guarantor
will be released from its obligation hereunder upon the Satisfaction in Full of
the Obligations.

      SECTION 4. Waivers. To the extent permitted by applicable law, each
Guarantor hereby waives promptness, diligence, notice of acceptance and any
other notice with respect to any of the Guaranteed Obligations and this Guaranty
and any requirement that the Collateral Agent exhaust any right or take any
action against any other Transaction Party or any other Person or any
Collateral. Each Guarantor acknowledges that it will receive direct and indirect
benefits from the financing arrangements contemplated herein and that the waiver
set forth in this Section 4 is knowingly made in contemplation of such benefits.
The Guarantors hereby waive any right to revoke this Guaranty, and acknowledge
that this Guaranty is continuing in nature and applies to all Guaranteed
Obligations, whether existing now or in the future.

                                      -3-
<PAGE>

      SECTION 5. Subrogation. No Guarantor may exercise any rights that it may
now or hereafter acquire against any Transaction Party or any other guarantor
that arise from the existence, payment, performance or enforcement of any
Guarantor's obligations under this Guaranty, including, without limitation, any
right of subrogation, reimbursement, exoneration, contribution or
indemnification and any right to participate in any claim or remedy of the
Collateral Agent against any Transaction Party or any other guarantor or any
Collateral, whether or not such claim, remedy or right arises in equity or under
contract, statute or common law, including, without limitation, the right to
take or receive from any Transaction Party or any other guarantor, directly or
indirectly, in cash or other property or by set-off or in any other manner,
payment or security solely on account of such claim, remedy or right, unless and
until all of the Guaranteed Obligations (other than inchoate indemnity
obligations) and all other amounts payable under this Guaranty (other than
inchoate indemnity obligations) shall have indefeasibly been paid or otherwise
satisfied in full in accordance with the terms of the Transaction Documents. If
any amount shall be paid to a Guarantor in violation of the immediately
preceding sentence at any time prior to the later of the satisfaction in full of
the Guaranteed Obligations and all other amounts payable under this Guaranty,
such amount shall be held in trust for the benefit of the Collateral Agent and
shall forthwith be paid to the Collateral Agent to be credited and applied to
the Guaranteed Obligations and all other amounts payable under this Guaranty,
whether matured or unmatured, in accordance with the terms of the Transaction
Document, or to be held as Collateral for any Guaranteed Obligations or other
amounts payable under this Guaranty thereafter arising. If (a) any Guarantor
shall make payment to the Collateral Agent of all or any part of the Guaranteed
Obligations, and (b) all of the Guaranteed Obligations (other than inchoate
indemnity obligations) and all other amounts payable under this Guaranty (other
than inchoate indemnity obligations) shall indefeasibly be satisfied in full,
the Collateral Agent will, at such Guarantor's request and expense, execute and
deliver to such Guarantor appropriate documents, without recourse and without
representation or warranty, necessary to evidence the transfer by subrogation to
such Guarantor of an interest in the Guaranteed Obligations resulting from such
payment by such Guarantor.

      SECTION 6. Representations, Warranties and Covenants.

      (a)   Each Guarantor hereby represents and warrants as of the date first
written above as follows:

            (i)   Each Guarantor (A) is a corporation, limited liability company
or limited partnership duly organized, validly existing and in good standing
under the laws of the jurisdiction of its organization as set forth on the
signature pages hereto, (B) has all requisite corporate, limited liability
company or limited partnership power and authority to conduct its business as
now conducted and as presently contemplated and to execute and deliver this
Guaranty, and to consummate the transactions contemplated hereby and thereby and
(C) is duly qualified to do business and is in good standing in each
jurisdiction in which the character of the properties owned or leased by it or
in which the transaction of its business makes such qualification necessary
except where the failure to be so qualified would not result in a Material
Adverse Effect.

                                      -4-
<PAGE>

            (ii)  The execution, delivery and performance by each Guarantor of
this Guaranty (A) have been duly authorized by all necessary corporate, limited
liability company or limited partnership action, (B) do not and will not
contravene its charter or by-laws, its limited liability company or operating
agreement or its certificate of partnership or partnership agreement, as
applicable, or any applicable law or any contractual restriction binding on such
Guarantor or its properties do not and will not result in or require the
creation of any lien (other than pursuant to any Transaction Document) upon or
with respect to any of its properties, and (C) do not and will not result in any
default, noncompliance, suspension, revocation, impairment, forfeiture or
nonrenewal of any material permit, license, authorization or approval applicable
to it or its operations or any of its properties.

            (iii) No authorization or approval or other action by, and no notice
to or filing with, any governmental authority is required in connection with the
due execution, delivery and performance by each Guarantor of this Guaranty
(other than expressly provided for in this Guaranty).

            (iv)  This Guaranty, when delivered, will be, a legal, valid and
binding obligation of such Guarantor, enforceable against such Guarantor in
accordance with its terms, except as may be limited by applicable bankruptcy,
insolvency, reorganization, moratorium, fraudulent conveyance, suretyship or
other similar laws and equitable principles (regardless of whether enforcement
is sought in equity or at law).

            (v)   There is no pending or, to the best knowledge of any
Guarantor, threatened action, suit or proceeding against such Guarantor or to
which any of the properties of such Guarantor is subject, before any court or
other governmental authority or any arbitrator that (A) if adversely determined,
could reasonably be expected to have a Material Adverse Effect or (B) relates to
this Guaranty or any of the other Transaction Documents to which such Guarantor
is a party or any transaction contemplated hereby or thereby.

            (vi)  Each Guarantor (A) has read and understands the terms and
conditions of the Purchase Agreements and the other Transaction Documents, and
(B) now has and will continue to have independent means of obtaining information
concerning the affairs, financial condition and business of the Company and the
other Transaction Parties, and has no need of, or right to obtain from any
Buyer, any credit or other information concerning the affairs, financial
condition or business of the Company or the other Transaction Parties that may
come under the control of any Buyer.

      (b)   Each Guarantor covenants and agrees that until the Satisfaction in
Full of the Obligations, it will comply with each of the covenants (except to
the extent applicable only to a public company) which are set forth in Section 4
of the Purchase Agreements as if such Guarantor were a party thereto.

      SECTION 7. Right of Set-off. Upon the occurrence and during the
continuance of any Event of Default (as defined in the Notes), any Buyer may,
and is hereby authorized to, at any time and from time to time, without notice
to the Guarantors (any such notice being expressly waived by each Guarantor) and
to the fullest extent permitted by law, set-off and apply any and all deposits
(general or special, time or demand, provisional or final) at any time held and
other indebtedness at any time owing by any Buyer to or for the credit or the
account of any Guarantor against any and all obligations of the Guarantors now
or hereafter existing under this Guaranty or any other Transaction Document,
irrespective of whether or not any Buyer shall have made any demand under this
Guaranty or any other Transaction Document and although such obligations may be
contingent or unmatured. Each Buyer agrees to notify the relevant Guarantor
promptly after any such set-off and application made by such Buyer, provided
that the failure to give such notice shall not affect the validity of such
set-off and application. The rights of any Buyer under this Section 7 are in
addition to other rights and remedies (including, without limitation, other
rights of set-off) which such Buyer may have under this Guaranty or any other
Transaction Document in law or otherwise.

                                      -5-
<PAGE>

      SECTION 8. Notices, Etc. All notices and other communications provided for
hereunder shall be in writing and shall be mailed, telecopied or delivered, if
to any Guarantor, to the address of the Company set forth in the Purchase
Agreements, or if to the Collateral Agent or any Buyer, to it at its respective
address set forth in the Purchase Agreements; or as to any Person at such other
address as shall be designated by such Person in a written notice to such other
Person complying as to delivery with the terms of this Section 8. All such
notices and other communications shall be effective (i) if mailed (by certified
mail, postage prepaid and return receipt requested), when received or three
Business Days after deposited in the mails, whichever occurs first; (ii) if
telecopied, when transmitted and confirmation is received, provided same is on a
Business Day and, if not, on the next Business Day; or (iii) if delivered by
hand, upon delivery, provided same is on a Business Day and, if not, on the next
Business Day. For the avoidance of doubt, the Subsidiaries, as Guarantors,
hereby appoint the Company as its agent for receipt of service of process and
all notices and other communications in the United States at the address
specified in the Purchase Agreements.

      SECTION 9. CONSENT TO JURISDICTION; SERVICE OF PROCESS AND VENUE. ANY
LEGAL ACTION OR PROCEEDING WITH RESPECT TO THIS GUARANTY OR ANY OTHER
TRANSACTION DOCUMENT MAY BE BROUGHT IN THE COURTS OF THE STATE OF NEW YORK IN
THE COUNTY OF NEW YORK OR OF THE UNITED STATES DISTRICT COURT FOR THE SOUTHERN
DISTRICT OF NEW YORK, AND, BY EXECUTION AND DELIVERY OF THIS GUARANTY, EACH
GUARANTOR HEREBY IRREVOCABLY ACCEPTS IN RESPECT OF ITS PROPERTY, GENERALLY AND
UNCONDITIONALLY, THE JURISDICTION OF THE AFORESAID COURTS. EACH GUARANTOR HEREBY
IRREVOCABLY APPOINTS THE COMPANY AS ITS AGENT FOR SERVICE OF PROCESS IN RESPECT
OF ANY SUCH ACTION OR PROCEEDING AND FURTHER IRREVOCABLY CONSENTS TO THE SERVICE
OF PROCESS OUT OF ANY OF THE AFOREMENTIONED COURTS AND IN ANY SUCH ACTION OR
PROCEEDING BY THE MAILING OF COPIES THEREOF BY REGISTERED OR CERTIFIED MAIL,
POSTAGE PREPAID, AT ITS ADDRESS SET FORTH IN THE PURCHASE AGREEMENTS, SUCH
SERVICE TO BECOME EFFECTIVE TEN (10) DAYS AFTER SUCH MAILING. NOTHING HEREIN
SHALL AFFECT THE RIGHT OF THE COLLATERAL AGENT TO SERVICE OF PROCESS IN ANY
OTHER MANNER PERMITTED BY LAW OR TO COMMENCE LEGAL PROCEEDINGS OR OTHERWISE
PROCEED AGAINST EACH GUARANTOR IN ANY OTHER JURISDICTION. ANY GUARANTOR HEREBY
EXPRESSLY AND IRREVOCABLY WAIVES, TO THE FULLEST EXTENT PERMITTED BY LAW, ANY
OBJECTION WHICH IT MAY NOW OR HEREAFTER HAVE TO THE JURISDICTION OR LAYING OF
VENUE OF ANY SUCH LITIGATION BROUGHT IN ANY SUCH COURT REFERRED TO ABOVE AND ANY
CLAIM THAT ANY SUCH LITIGATION HAS BEEN BROUGHT IN AN INCONVENIENT FORUM. TO THE
EXTENT THAT ANY GUARANTOR HAS OR HEREAFTER MAY ACQUIRE ANY IMMUNITY FROM
JURISDICTION OF ANY COURT OR FROM ANY LEGAL PROCESS (WHETHER THROUGH SERVICE OR
NOTICE, ATTACHMENT PRIOR TO JUDGMENT, ATTACHMENT IN AID OF EXECUTION OR
OTHERWISE) WITH RESPECT TO ITSELF OR ITS PROPERTY, EACH GUARANTOR HEREBY
IRREVOCABLY WAIVES SUCH IMMUNITY IN RESPECT OF ITS OBLIGATIONS UNDER THIS
GUARANTY AND THE OTHER TRANSACTION DOCUMENTS.

                                      -6-
<PAGE>

      SECTION 10. WAIVER OF JURY TRIAL, ETC. EACH GUARANTOR HEREBY WAIVES ANY
RIGHT TO A TRIAL BY JURY IN ANY ACTION, PROCEEDING OR COUNTERCLAIM CONCERNING
ANY RIGHTS UNDER THIS GUARANTY OR THE OTHER TRANSACTION DOCUMENTS, OR UNDER ANY
AMENDMENT, WAIVER, CONSENT, INSTRUMENT, DOCUMENT OR OTHER AGREEMENT DELIVERED OR
WHICH IN THE FUTURE MAY BE DELIVERED IN CONNECTION HEREWITH OR THEREWITH, OR
ARISING FROM ANY FINANCING RELATIONSHIP EXISTING IN CONNECTION WITH THIS
GUARANTY OR THE OTHER TRANSACTION DOCUMENTS, AND AGREES THAT ANY SUCH ACTION,
PROCEEDING OR COUNTERCLAIM SHALL BE TRIED BEFORE A COURT AND NOT BEFORE A JURY.
EACH GUARANTOR CERTIFIES THAT NO OFFICER, REPRESENTATIVE, AGENT OR ATTORNEY OF
THE COLLATERAL AGENT OR ANY BUYER HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT
ANY BUYER WOULD NOT, IN THE EVENT OF ANY ACTION, PROCEEDING OR COUNTERCLAIM,
SEEK TO ENFORCE THE FOREGOING WAIVERS. EACH GUARANTOR HEREBY ACKNOWLEDGES THAT
THIS PROVISION IS A MATERIAL INDUCEMENT FOR THE COLLATERAL AGENT ENTERING INTO
THIS GUARANTY.

      SECTION 11. Taxes.

      (a)   All payments made by any Guarantor hereunder or under any other
Transaction Document shall be made in accordance with the terms of the
respective Transaction Document and shall be made without set-off, counterclaim,
deduction or other defense. All such payments shall be made free and clear of
and without deduction for any present or future taxes, levies, imposts,
deductions, charges or withholdings, and all liabilities with respect thereto,
excluding taxes imposed on the net income of any Buyer by the jurisdiction in
which such Buyer is organized or where it has its principal lending office (all
such nonexcluded taxes, levies, imposts, deductions, charges, withholdings and
liabilities, collectively or individually, "TAXES"). If any Guarantor shall be
required to deduct or to withhold any Taxes from or in respect of any amount
payable hereunder or under any other Transaction Document:

            (i)   the amount so payable shall be increased to the extent
necessary so that after making all required deductions and withholdings
(including Taxes on amounts payable to any Buyer pursuant to this sentence) each
Buyer receives an amount equal to the sum it would have received had no such
deduction or withholding been made,

            (ii)  such Guarantor shall make such deduction or withholding,

                                      -7-
<PAGE>

            (iii) such Guarantor shall pay the full amount deducted or withheld
to the relevant taxation authority in accordance with applicable law, and

            (iv)  as promptly as possible thereafter, such Guarantor shall send
the Buyers an official receipt (or, if an official receipt is not available,
such other documentation as shall be reasonably satisfactory to the Collateral
Agent, as the case may be) showing payment of such Taxes. In addition, each
Guarantor agrees to pay any present or future stamp or documentary taxes or any
other excise or property taxes, charges or similar levies that arise from any
payment made hereunder or from the execution, delivery, registration or
enforcement of, or otherwise with respect to, this Guaranty or any other
Transaction Document (collectively, "OTHER TAXES").

      (b)   Each Guarantor hereby indemnifies and agrees to hold the Collateral
Agent and each Buyer (each an "INDEMNIFIED PARTY") harmless from and against
Taxes or Other Taxes (including, without limitation, any Taxes or Other Taxes
imposed by any jurisdiction on amounts payable under this Section 11) paid by
any Indemnified Party as a result of any payment made hereunder or from the
execution, delivery, registration or enforcement of, or otherwise with respect
to, this Guaranty or any other Transaction Document, and any liability
(including penalties, interest and expenses for nonpayment, late payment or
otherwise) arising therefrom or with respect thereto, whether or not such Taxes
or Other Taxes were correctly or legally asserted. This indemnification shall be
paid within 30 days from the date on which the Collateral Agent or such Buyer
makes written demand therefor, which demand shall identify the nature and amount
of such Taxes or Other Taxes.

      (c)   If any Guarantor fails to perform any of its obligations under this
Section 11, such Guarantor shall indemnify the Collateral Agent and each Buyer
for any taxes, interest or penalties that may become payable as a result of any
such failure. The obligations of the Guarantors under this Section 11 shall
survive the termination of this Guaranty and the payment of the Obligations and
all other amounts payable hereunder.

      SECTION 12. Miscellaneous.

      (a)   Each Guarantor will make each payment hereunder in lawful money of
the United States of America and in immediately available funds to each Buyer,
at such address specified by such Buyer from time to time by notice to the
Guarantors.

      (b)   No amendment or waiver of any provision of this Guaranty and no
consent to any departure by any Guarantor therefrom shall in any event be
effective unless the same shall be in writing and signed by each Guarantor and
such Buyers as are required pursuant to Section 9(e) of the Purchase Agreements,
and then such waiver or consent shall be effective only in the specific instance
and for the specific purpose for which given.

      (c)   No failure on the part of any Buyer to exercise, and no delay in
exercising, any right hereunder or under any other Transaction Document shall
operate as a waiver thereof, nor shall any single or partial exercise of any
right hereunder or under any Transaction Document preclude any other or further
exercise thereof or the exercise of any other right. The rights and remedies of
the Collateral Agent and the Buyers provided herein and in the other Transaction
Documents are cumulative and are in addition to, and not exclusive of, any
rights or remedies provided by law. The rights of the Collateral Agent and the
Buyers under any Transaction Document against any party thereto are not
conditional or contingent on any attempt by the Collateral Agent or any Buyer to
exercise any of their respective rights under any other Transaction Document
against such party or against any other Person.

                                      -8-
<PAGE>

      (d)   Any provision of this Guaranty that is prohibited or unenforceable
in any jurisdiction shall, as to such jurisdiction, be ineffective to the extent
of such prohibition or unenforceability without invalidating the remaining
portions hereof or affecting the validity or enforceability of such provision in
any other jurisdiction.

      (e)   This Guaranty shall (i) be binding on each Guarantor and its
respective successors and assigns, and (ii) inure, together with all rights and
remedies of the Collateral Agent hereunder, to the benefit of the Collateral
Agent, the Buyers and their respective successors, transferees and assigns.
Without limiting the generality of clause (ii) of the immediately preceding
sentence, the Collateral Agent and any Buyer may assign or otherwise transfer
its rights and obligations under the Purchase Agreements or any other
Transaction Document to any other Person in accordance with the terms thereof,
and such other Person shall thereupon become vested with all of the benefits in
respect thereof granted to the Collateral Agent or such Buyer, as the case may
be, herein or otherwise. None of the rights or obligations of any Guarantor
hereunder may be assigned or otherwise transferred without the prior written
consent of such Buyers as are required pursuant to Section 9(e) of the Purchase
Agreements.

      (f)   This Guaranty, along with the Purchase Agreements and the other
Transaction Documents, reflects the entire understanding of the transaction
contemplated hereby and shall not be contradicted or qualified by any other
agreement, oral or written, entered into before the date hereof.

      (g)   Section headings herein are included for convenience of reference
only and shall not constitute a part of this Guaranty for any other purpose.

      (h)   Notwithstanding anything to the contrary contained herein, this
Guaranty is not intended to and does not serve to effect a novation of the
Obligations. Instead it is the express intention of the parties hereto to
reaffirm the indebtedness created under the 2007 Securities Purchase Agreement
and the 2007 Notes, and secured by the Collateral. Guarantor acknowledges and
confirms that the Liens granted pursuant to the 2007 Transaction Documents
secured the indebtedness, liabilities and obligations of Guarantor to the
Collateral Agent and Buyers under the 2007 Securities Purchase agreement and
2007 Notes, as amended and restated hereby, and that the term "Obligations" as
used in the 2007 Transaction Documents (or any other terms used therein to
describe to refer to the indebtedness, liabilities and obligations to Collateral
Agent and Buyers) includes, without limitation, the indebtedness, liabilities
and obligations, to be delivered hereunder, and under the 2007 Securities
Purchase Agreement, all as amended and restated hereby, as the same may be
further amended, modified, supplemented or restated from time to time. The
Transaction Documents and all agreements, instruments and documents executed or
delivered in connection with any of the foregoing shall each be deemed to be
amended in the extent necessary to give effect to the provisions of this
Guaranty. This Guaranty and the other Transaction Documents referred to herein
set forth the entire understanding of the parties with respect to the subject
matter hereof.

                                      -9-
<PAGE>

      (I)   THIS GUARANTY SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH
THE LAW OF THE STATE OF NEW YORK APPLICABLE TO CONTRACTS MADE AND TO BE
PERFORMED THEREIN WITHOUT REGARD TO CONFLICT OF LAW PRINCIPLES.

                [REMAINDER OF THIS PAGE INTENTIONALLY LEFT BLANK]

                                      -10-
<PAGE>

      IN WITNESS WHEREOF, each Guarantor has caused this Guaranty to be executed
by its respective duly authorized officer, as of the date first above written.

                                        RAPTOR NETWORKS TECHNOLOGY INC.,
                                        a California Corporation

                                        By: /s/ Thomas M. Wittenschlaeger
                                            ------------------------------------
                                            Name: Thomas M. Wittenschlaeger
                                            Title: President

ACCEPTED BY:

CASTLERIGG MASTER INVESTMENTS LTD.

BY: SANDELL ASSET MANAGEMENT CORP.

By: /s/  Timothy O'Brien
    ------------------------------------
Name: Timothy O'Brien
Title: Chief Financial Officer

RAPTOR NETWORKS TECHNOLOGY, INC., a Colorado corporation

By: /s/ Thomas M. Wittenschlaeger
    ------------------------------------
    Name: Thomas M. Wittenschlaeger
    Title: Chairman and Chief Executive Officer

                                      -11-<PAGE>
Exhibit 10.39

             AMENDMENT NO. 5 AND LIMITED WAIVER TO CREDIT AGREEMENT

         This AMENDMENT NO. 5 AND LIMITED WAIVER TO CREDIT AGREEMENT (this
"Amendment"), dated as of February 22, 2008, by and among RADNET MANAGEMENT,
INC., a California corporation (the "Borrower"), the other persons designated as
Credit Parties on the signature pages hereof, GENERAL ELECTRIC CAPITAL
CORPORATION, a Delaware corporation, as agent ("Agent") and the Persons
signatory thereto from time to time as Lenders. Unless otherwise specified
herein, capitalized terms used in this Amendment shall have the meanings
ascribed to them in the Credit Agreement (each as hereinafter defined).

                                    RECITALS

         WHEREAS, the Borrower, the Credit Parties, Agent and Lenders have
entered into that certain Credit Agreement dated as of November 15, 2006 (as
amended by that certain (i) Limited Waiver and Amendment No. 1 to Credit
Agreement dated as of April 5, 2007, (ii) Amendment No. 2 to Credit Agreement
dated as of May 30, 2007, (iii) Amendment No. 3 to Credit Agreement dated as of
August 23, 2007 and (iv) Amendment No. 4 to Credit Agreement dated as of
December 3, 2007, and as further amended, supplemented, restated or otherwise
modified from time to time, the "Credit Agreement"); and

         WHEREAS, the Borrowers, Agent, Requisite Lenders and the Supermajority
Revolving Lenders have agreed to the amendments and limited waiver as set forth
herein;

         NOW THEREFORE, in consideration of the mutual execution hereof and
other good and valuable consideration, the parties hereto agree as follows:

                  1. Amendments to Credit Agreement.

                    (a) Amendment to Section 1.1(a). Section 1.1(a) of the
Credit Agreement is hereby amended by amending and restating the third and
fourth sentence therein to read in their entirety as follows:

                  "Amounts borrowed under this subsection (a) are collectively
         referred to as the "Initial Term Loan B and together with any
         Incremental Term Loan (as defined below), the "Term Loan B"." Borrower
         shall repay the Initial Term Loan B through periodic payments on the
         dates and in the amounts indicated below (together with any scheduled
         payments of the Incremental Term Loan, "Scheduled Installments")."

                  (b) Amendment to Section 1.1. Section 1.1 of the Credit
Agreement is hereby amended by inserting the following new clause (g):

                           "(g) Incremental Loans.

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                  (i) Borrower may make up to five requests for an incremental
         term loan (the "Incremental Term Loan") or incremental revolving loan
         (the "Incremental Revolving Loan"), each such request being for at
         least $5,000,000, and in an aggregate amount not to exceed $40,000,000
         for all such requests pursuant to delivery of a written request from
         the Borrower to the Agent. Each such notice shall specify the date (an
         "Increase Effective Date") on which the Borrower proposes that the
         increased or new Commitments shall be effective, which date shall be a
         date not less than ten (10) Business Days after such request is
         delivered to the Agent. The increased or new Commitments shall become
         effective on the applicable Increase Effective Date as long as each of
         the following conditions have been met:

                           (A) no Default or Event of Default has occurred or is
         continuing or would result after giving effect to such Incremental Term
         Loan or Incremental Revolving Loan;

                           (B) (1) the maturity date of any Incremental Term
         Loan, the weighted average life of any Incremental Term Loan, the
         effective yield to the Lenders under such Incremental Term Loan
         (including interest, fees received ratably by such Lenders and original
         issue discount) shall be the same as the Initial Term Loan B, as
         applicable, at the time such Incremental Term Loan is funded and (2)
         any Incremental Revolving Loan shall become part of the Revolving Loans
         with the same maturity, interest, fees and terms as the Revolving
         Loans;

                           (C) the Borrower has provided evidence reasonably
         satisfactory to the Agent that the Borrower would have been in
         compliance with the financial covenants set forth in Section 6 assuming
         that the Incremental Term Loan or Incremental Revolving Loan, as
         applicable, had been incurred on the last day of the then most recently
         completed Fiscal Quarter; and

                           (D) the Agent shall have received amendments to this
         Agreement and the Loan Documents, joinder agreements for any new
         Lenders, and all other promissory notes, agreements, documents and
         instruments reasonably satisfactory to the Agent in its reasonable
         discretion evidencing and setting forth the conditions of the
         Incremental Term Loan or Incremental Revolving Loan, as applicable.

                  (ii) Each Lender which (a) holds a Term Loan B on the date the
         Borrower delivers a written request to the Agent for a Incremental Term
         Loan or a Revolving Loan on the date the Borrower delivers a written
         request to the Agent for an Incremental Revolving Loan and (b) notifies
         the Agent in writing within five (5) days of receipt of written notice
         from the Agent that Borrower has requested an Incremental Term Loan or
         Incremental Revolving Loan, as applicable, shall have the right to fund
         its pro rata share of the Incremental Term Loan or Incremental
         Revolving Loan, as applicable, based upon its share of the Term Loan B
         Commitment or the Revolving Loan Commitment, as applicable, as

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         of the date the Agent originally received the applicable notice from
         the Borrower. Notwithstanding anything contained herein or otherwise to
         the contrary, no Lender shall have any obligation to fund all or any
         portion of, or participate in, the Incremental Term Loan or the
         Incremental Revolving Loan. Amounts of the Incremental Term Loan which
         are repaid may not be reborrowed.

                  (iii) On any Increase Effective Date on which Incremental
         Revolving Loans are effected, subject to the satisfaction of the
         foregoing terms and conditions, (A) each of the Lenders with Revolving
         Loan Commitments shall assign to each Lender with an Incremental
         Revolving Loan (each, an "Incremental Revolving Loan Lender") and each
         of the Incremental Revolving Loan Lenders shall purchase from each of
         the Lenders with Revolving Loan Commitments, at the principal amount
         thereof (together with accrued interest), such interests in the
         Revolving Loans on such Increase Effective Date as shall be necessary
         in order that, after giving effect to all such assignments and
         purchases, such Revolving Loans will be held by existing Lenders with
         Revolving Loan and Incremental Revolving Loan Lenders ratably in
         accordance with their Revolving Loan Commitments after giving effect to
         the addition of such Incremental Revolving Loans to the Revolving Loan
         Commitments, (B) each Incremental Revolving Loan shall be deemed for
         all purposes a Revolving Loan Commitment and each Loan made thereunder
         shall be deemed, for all purposes, a Revolving Loan and (C) each
         Incremental Revolving Loan Lender shall become a Lender with respect to
         the Revolving Loan Commitment and all matters relating thereto.

                  (iv) On any Increase Effective Date on which Incremental Term
         Loans are effected, subject to the satisfaction of the foregoing terms
         and conditions, (A) each Lender with an Incremental Term Loan (each, an
         "Incremental Term Loan Lender") shall make a Loan to the Borrower in an
         amount equal to the amount of the Incremental Term Loan such Lender has
         committed to fund and (B) each Incremental Term Loan Lender shall
         become a Lender hereunder with respect to the Incremental Term Loan.
         Amounts of the Incremental Term Loan repaid may not be reborrowed.

                  (v) Each of the Borrower, Lenders and Agent acknowledges and
         agrees that an Incremental Term Loan or Incremental Revolving Loan (and
         related amendments and documents described in clause (iv) above)
         meeting the conditions set forth in this Section 1.1(g) shall not
         require the consent of any Lender other than those Lenders, if any,
         which have agreed to participate in the Incremental Term Loan or the
         Incremental Revolving Loan, as applicable."

                           (c) Amendment to Section 1.2(a). Section 1.2(a) of
the Credit Agreement is hereby amended by (i) replacing each occurrence of the
term "2.00%" with the term "3.25%" and (ii) replacing each occurrence of the
term "3.50%" with the term "4.25%" therein.

                           (d) Amendment to Section 1.3(a). Section 1.3(a) of
the Credit Agreement is hereby amended and restated to read in its entirety as
follows:

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                  "Fee Letter. Borrower shall pay to GE Capital, individually,
         the Fees specified in that certain fee letter dated as of June 27, 2006
         among Borrower and GE Capital, as supplemented by that certain
         Supplemental Fee Letter dated as of the Amendment No. 3 Closing Date
         and as supplemented by that certain Supplemental Fee Letter dated as of
         the Amendment No. 5 Closing Date (collectively, the "GE Capital Fee
         Letter"), at the times specified for payment therein."

                           (e) Amendment to Section 1.5(d). Section 1.5(d) of
the Credit Agreement is hereby amended and restated to read in its entirety as
follows:

                  "Prepayments from Issuance of Securities; Segregated Account.
         Immediately upon the receipt by Holdings, Borrower or any of its
         Subsidiaries of the proceeds of the issuance of Stock, Borrower shall
         prepay the Loans in an amount equal to fifty percent (50%) of such
         proceeds, net of underwriting discounts and commissions and other
         reasonable out-of-pocket costs associated therewith. The payments shall
         be applied in accordance with Section 1.5(e). Notwithstanding the
         foregoing, the following proceeds of stock issuance shall be excluded
         from any mandatory prepayment: (i) proceeds of issuances of Stock by
         Holdings or Borrower on or prior to the Closing Date, (ii) proceeds of
         issuances of Stock of Holdings (and options and warrants for the
         issuance of Stock of Holdings) to employees and directors of Holdings,
         Borrower or Beverly and proceeds from the exercise of options and
         warrants by employees and directors and (iii) proceeds of issuances of
         Stock by any Subsidiary of Borrower to Borrower which constitutes an
         Investment permitted hereunder. On the one hundred twentieth day
         following (i) the Amendment No. 5 Closing Date, the Borrower shall
         prepay the Loans, in accordance with Section 1.5(e), in an amount equal
         to 100% of the remaining funds in the Segregated Account which were
         deposited in the Segregated Account on the Amendment No. 5 Closing Date
         and have not been used to pay the purchase price of the Strategic
         Initiatives and (ii) the date on which any additional funds are
         deposited into the Segregated Account, the Borrower shall prepay the
         Loans, in accordance with Section 1.5(e), in an amount equal to 100% of
         the remaining funds in the Segregated Account which were deposited on
         such date and have not been used to pay the purchase price of the
         Strategic Initiatives."

                           (f) Amendment to Section 3.25. Section 3.25 of the
Credit Agreement is hereby amended and restated to read in its entirety as
follows:

         "3.25 Segregated Account. As of the Amendment No. 5 Closing Date,
         Borrower has deposited into deposit account number 112813519 at City
         National Bank $17,271,000 ("Segregated Account") which (i) funds (along
         with any additional funds deposited into the Segregated Account within
         forty-five (45) days of the Amendment No. 5 Closing Date) will be used
         solely to (A) pay for Strategic Initiatives approved in writing by the
         Agent or (B) repay Loans hereunder as required by Section 1.5(d) and
         (ii) will be subject to a Control Agreement. The Agent shall have sole
         dominion and control of the Segregated Account and shall

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<PAGE>

        withdraw funds therefrom (i) upon the written request of the Borrower,
        to pay for Strategic Initiatives approved in writing by the Agent or
        (ii) to repay Loans as required by Section 1.5(d) (and the Borrower
        hereby acknowledges that the Agent may, without notice to the Borrower,
        withdraw funds from the Segregated Account for the purposes set forth in
        this sentence)."

                           (g) Amendment to Section 5.1(f). Section 5.1(f) of
the Credit Agreement is hereby amended by replacing the amount "$20,000,000"
which appears therein with "$25,000,000". (h) Amendment to Section 5.6(v).
Section 5.6(v) of the Credit Agreement is hereby amended and restated to read in
its entirety as follows:

                  "(v) the sum of all amounts payable in connection with any
        Permitted Acquisition (including the purchase price, all transaction
        costs and all Indebtedness, liabilities and Contingent Obligations
        incurred or assumed in connection therewith or otherwise reflected on a
        consolidated balance sheet of Borrower and Target) shall not exceed
        $20,000,000 and the sum of such amounts payable in connection with all
        Permitted Acquisitions shall not exceed $100,000,000, and the portion
        thereof allocable to goodwill and intangible assets for all such
        Permitted Acquisitions during the term hereof shall not exceed
        $60,000,000."

                           (i) Amendment to Section 6.1(a). Section 6.1(a) of
         the Credit Agreement is hereby amended and restated to read in its
         entirety as follows:

                  "Capital Expenditure Limits. Holdings and its Subsidiaries on
        a consolidated basis shall not make Capital Expenditures during the
        following periods that exceed the aggregate amounts set forth opposite
        each of such periods (the "Capex Limit"):

                 Period                                     Maximum Capital
                                                        Expenditures per Period

                 Fiscal Year 2007                             $42,000,000

                 Fiscal Year 2008 and                         $50,000,000
                 each Fiscal Year thereafter

                  provided, however, that the Capex Limit referenced above will
        be increased in any period by an amount equal to 50% of the difference
        obtained by taking the Capex Limit for the immediately prior period
        (excluding any Capex Carry Over Amounts) minus the actual amount of any
        Capital Expenditures expended during such prior period (the "Capex Carry
        Over Amount"), and for purposes of measuring compliance herewith, the
        Capex Carry Over Amount shall be deemed to be the last amount spent on
        Capital Expenditures in that succeeding period; provided further that
        (i) the Capex Limit for Fiscal Year 2008 shall be reduced by the
        positive difference, if any, between (A) the actual amount of

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         Capital Expenditures expended during Fiscal Year 2007 minus (B) the
         Capex Limit for Fiscal Year 2007 and (ii) that the Capex Carry Over
         Amount for any Fiscal Year shall not exceed $10,000,000."

                           (j) Amendment to Section 6.1(c). Section 6.1(c) of
         the Credit Agreement is hereby amended and restated to read in its
         entirety as follows:

                  "Minimum Fixed Charge Coverage Ratio. Holdings and its
         Subsidiaries shall have on a consolidated basis at the end of each
         Fiscal Quarter set forth below, a Fixed Charge Coverage Ratio for the
         12-Fiscal Month period then ended of not less than the following:

                  1.20 for the Fiscal Quarters ending December 31, 2006 and
                       March 31, 2007;
                  1.15 for the Fiscal Quarter ending June 30, 2007;
                  1.10 for each Fiscal Quarter ending after June 30, 2007
                       but on or prior to December 31, 2011; and
                  1.20 for each Fiscal Quarter ending thereafter."

                           (k) Amendment to Section 6.1(e). Section 6.1(e) of
         the Credit Agreement is hereby amended and restated to read in its
         entirety as follows:

                  "Maximum Leverage Ratio. Holdings and its Subsidiaries on a
         consolidated basis shall have, at the end of each Fiscal Quarter set
         forth below, a Leverage Ratio as of the last day of such Fiscal Quarter
         and for the 12-Fiscal Month period then ended, of not more than the
         following:

                  4.35     for the Fiscal Quarters ending December 31, 2006,
                           2006 and March 31, 2007;

                  4.70     for the Fiscal Quarter ending June 30, 2007; 4.80 for
                           the Fiscal Quarter ending September 30, 2007;

                  5.00     for the Fiscal Quarters ending December 31, 2007,
                           March 31, 2008, June 30, 2008 and September 30, 2008;

                  4.75     for the Fiscal Quarters ending December 31, 2008 and
                           March 31, 2009;

                  4.50     for the Fiscal Quarter ending June 30, 2009 and
                           September 30, 2009;

                  4.25     for the Fiscal Quarters ending December 31, 2009,
                           March 31, 2010 and June 30, 2010;

                  4.00     for the Fiscal Quarters ending September 30, 2010 and
                           December 31, 2010;

                  3.25     for the Fiscal Quarters ending March 31, 2011, June
                           30, 2011, September 30, 2011 and December 31, 2011;
                           and

                  3.00     for the Fiscal Quarter ending March 31, 2012 and for
                           each Fiscal Quarter ending thereafter."

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<PAGE>

                           (l) Amendment to Section 6.1(f). Section 6.1(f) of
         the Credit Agreement is hereby amended and restated to read in its
         entirety as follows:

                  "Maximum Senior Leverage Ratio. Holdings and its Subsidiaries
         on a consolidated basis shall have, at the end of each Fiscal Quarter
         set forth below, a Senior Leverage Ratio as of the last day of such
         Fiscal Quarter and for the 12-Fiscal Month period then ended, of not
         more than the following:

                  2.85     for the Fiscal Quarter ending December 31, 2006;

                  2.85     for the Fiscal Quarter ending March 31, 2007;

                  2.95     for the Fiscal Quarter ending June 30, 2007;

                  3.00     for the Fiscal Quarter ending September 30, 2007;
                           3.15 for the Fiscal Quarters ending December 31,
                           2007, March 31, 2008, June 30, 2008, September 30,
                           2008 and December 31, 2008;

                  3.00     for the Fiscal Quarters ending March 31, 2009, June
                           30, 2009, September 30, 2009 and December 31, 2009;

                  2.75     for the Fiscal Quarters ending March 31, 2010, June
                           30, 2010, September 30, 2010 and December 31, 2010;
                           and

                  2.50     for the Fiscal Quarter ending March 31, 2011 and for
                           each Fiscal Quarter ending thereafter."

                           (m) Amendment to Section 6.2(a)(i). Section 6.2(a)(i)
of the Credit Agreement is hereby amended and restated to read in its entirety
as follows:

                  "As soon as available and in any event within forty-five (45)
         days (or if Holdings files an extension with the Securities & Exchange
         Commission, fifty (50) days; provided, that Borrower has given Agent a
         written explanation forty- five (45) days after the end of the
         applicable Fiscal Quarter of Holdings, in form and substance reasonably
         acceptable to Agent, regarding the need for such extension) after the
         end of each Fiscal Quarter (excluding the last Fiscal Quarter of
         Holdings' Fiscal Year), Borrower will deliver (1) the consolidated and
         consolidating balance sheets of Holdings and its Subsidiaries, as at
         the end of such quarter, and the related consolidated and consolidating
         statements of income, stockholders' equity and cash flow for such
         Fiscal Quarter and for the period from the beginning of the then
         current Fiscal Year of Holdings to the end of such Fiscal Quarter, (2)
         a report setting forth in comparative form the corresponding figures
         for the corresponding periods of the previous Fiscal Year and the
         corresponding figures from the most recent Projections for the current
         Fiscal Year delivered pursuant to Section 6.2(h) and (3) a schedule of
         the outstanding Indebtedness for borrowed money of Holdings and its
         Subsidiaries describing in reasonable detail

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<PAGE>

         each such debt issue or loan outstanding and the principal amount and
         amount of accrued and unpaid interest with respect to each such debt
         issue or loan."

                           (n) Amendment to Section 6.2(d). Section 6.2(d) of
the Credit Agreement is hereby amended by replacing the term "Fiscal Quarter"
with the term "Fiscal Month" therein.

                           (o) Amendment to Section 8.2(m). Section 8.2(m) of
the Credit Agreement is hereby amended by adding "AND (E) AUTHORIZES AND
INSTRUCTS THE AGENT ON ITS BEHALF TO ENTER INTO THE FIRST AMENDMENT TO
INTERCREDITOR AGREEMENT AS FIRST LIEN AGENT (AS DEFINED THEREIN) AND ON BEHALF
OF SUCH LENDER" after clause (D) in the first sentence thereof.

                           (p) Amendment to Section 9.2(b). Section 9.2(b) of
the Credit Agreement is hereby amended by inserting the following sentence after
the third sentence therein: "No amendment, modification, termination or waiver
of or consent with respect to any provision of any Loan Document appropriate (as
reasonably determined by the Agent) to evidence or implement an Incremental
Revolving Loan or Incremental Term Loan, shall be effective unless the same
shall be in writing and signed by Agent, Borrower, and any Incremental Revolving
Loan Lender or Incremental Term Loan Lender, as applicable; provided, however,
that any amendment to Section 1.1(g) shall require the written consent of the
Required Lenders."

                           (q) Amendments to Annex A. Annex A of the Credit
Agreement is hereby amended by inserting the following defined terms in their
appropriate alphabetical order:

                                    (1) "Amendment No. 5 Closing Date" means
                                    February 22, 2008."

                                    (2) "Delaware Imaging" means Delaware
                                    Imaging Partners, Inc., a Delaware
                                    corporation.

                                    (3) "First Amendment to Intercreditor
                                    Agreement" means that certain First
                                    Amendment to Intercreditor Agreement, dated
                                    February 22, 2008, among the Agent, the
                                    Second Lien Agent and the Credit Parties.

                                    (4) "Increase Effective Date" has the
                                    meaning ascribed to it in Section 1.1(g).

                                    (5) "Incremental Revolving Loan" has the
                                    meaning ascribed to it in Section 1.1(g).

                                    (6) "Incremental Revolving Loan Lender" has
                                    the meaning ascribed to it in Section
                                    1.1(g).

                                    (7) "Incremental Term Loan" has the meaning
                                    ascribed to it in Section 1.1(g).

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<PAGE>

                                    (8) "Incremental Term Loan Lender" has the
                                    meaning ascribed to it in Section 1.1(g).

                                    (9) "New Imaging Center" means, as of any
                                    date of determination, any new imaging
                                    center which has been open for business for
                                    less than (12) months.

                                    (10) "New Imaging Center EBITDA" means with
                                    respect to any New Imaging Center for any
                                    period (a "Measurement Period"), the product
                                    of (I) the "center level profit or loss" of
                                    such New Imaging Center determined in
                                    accordance with GAAP for the period (the
                                    "Annualization Period") from and including
                                    the date such New Imaging Center opened
                                    through and including the last day of the
                                    Measurement Period multiplied by (II) a
                                    number obtained by dividing 365 by the
                                    number of days in the Annualization Period.

                           (r) Amendments to Annex A.

                                    (1) Annex A of the Credit Agreement is
                                    hereby amended by amending and restating the
                                    following definitions to each read in its
                                    entirety as follows:

                  "Lenders means GE Capital, the other Lenders named on the
         signature pages of the Agreement, and, if any such Lender shall decide
         to assign all or any portion of the Obligations, such term shall
         include any assignee of such Lender, and any other financial
         institution that becomes a party hereto by execution of a joinder
         agreement in connection with any Incremental Term Loans or Incremental
         Revolving Loans and any assignee of such Lender."

                  "Revolving Loan Commitment means (a) as to any Lender, the
         commitment of such Lender to make its Pro Rata Share of Revolving
         Credit Advances or incur its Pro Rata Share of Letter of Credit
         Obligations (including, in the case of the Swing Line Lender, its
         commitment to make Swing Line Advances as a portion of its Revolving
         Loan Commitment) as set forth on Annex B (as supplemented by
         Supplemental Annex B to the Agreement) or in the most recent Assignment
         Agreement, if any, executed by such Lender and, if applicable, the
         commitment of such Lender to make Incremental Revolving Loans, which
         commitment is in the amount set forth in the applicable joinder
         agreement, or in the most recent Assignment Agreement, if any, executed
         by such Lender and (b) as to all Lenders, the aggregate commitment of
         all Lenders to make the Revolving Credit Advances (including, in the
         case of the Swing Line Lender, Swing Line Advances) or incur Letter of
         Credit Obligations, which aggregate commitment shall be FIFTY-FIVE
         MILLION DOLLARS ($55,000,000) on the Amendment No. 3 Closing Date, as
         such amount may be adjusted, if at all, from time to time in accordance
         with the Agreement."

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<PAGE>

                  "Term Loan B Commitment means (a) as to any Lender, the
         commitment of such Lender to make its Pro Rata Share of the Term Loan B
         (as set forth on Annex B (as supplemented by Supplemental Annex B)) in
         the maximum aggregate amount set forth in Section 1.1(a) or in the most
         recent Assignment Agreement, if any, executed by such Lender and the
         commitment of such Lender to make Incremental Term Loans, which
         commitment is in the amount set forth in the applicable joinder
         agreement, or in the most recent Assignment Agreement, if any, executed
         by such Lender and (b) as to all Lenders, the aggregate commitment of
         all Lenders to make the Term Loan B. The Term Loan B Commitment with
         respect to each Term Loan B shall reduce automatically by the amount
         prepaid or repaid in respect of such Term Loan B (but solely by the
         amount of such prepayment or repayment allocable to a Lender, for
         purposes of clause (a) of this definition)."

                                    (2) Annex A of the Credit Agreement is
                                    hereby amended by replacing the phrase
                                    "Telerate Page 3750" with the phrase
                                    "Reuters Screen LIBOR01 Page" in the
                                    definition of "LIBOR Rate" therein.

                           (s) Amendment to Annex F. Annex F is hereby replaced
with the revised Annex F attached as Annex F to this Amendment. (t) Schedules.
Each of Schedules 3.1(a), 3.1(b), 3.10, 3.11, 3.12, 3.14, 3.16, 3.17, 3.18,
3.19, 5. 1, and 5.2, to the Credit Agreement is hereby replaced with the
applicable Schedule attached hereto.

                           (u) Schedule II to Exhibit 6.2(d) is hereby amended
and restated to read in its entirety as set forth on Schedule II to Exhibit
6.2(d) attached hereto.

                           (v) Omnibus Amendment to Credit Agreement. Each
reference in the Credit Agreement to "Credit Party", "Credit Parties", and/or
"Guarantors" as applicable, shall be deemed to include a reference to Delaware
Imaging.

                  2. Limited Waiver. The Agent and the Lenders hereby waive any
breach or violation of the Credit Agreement (and any resulting Event of Default)
to the extent arising solely from the failure of Holdings and its Subsidiaries
to comply with the limitation on the maximum amount of Capital Expenditures
permitted for the Fiscal Year ending 2007 set forth in Section 6.1 of the Credit
Agreement so long as such Capital Expenditures did not exceed $49,000,000
("Specified Default").

The waiver set forth above shall be limited precisely as written and shall not
be deemed or otherwise construed to constitute a waiver of any other Default or
other Event of Default or any other provision of the Credit Agreement or any
other Loan Document or to prejudice any right, power or remedy which any Agent
or any Lender may now have or may have in the future under or in connection with
the Credit Agreement or any other Loan Document (after giving effect to this
Agreement), all of which rights, powers and remedies are hereby expressly
reserved by the Agents and Lenders.

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<PAGE>

         3. Representations and Warranties of Credit Parties. The Credit Parties
represent and warrant that:

                  (a) the execution, delivery and performance by each Credit
         Party of this Amendment have been duly authorized by all necessary
         corporate action required on its part and this Amendment is a legal,
         valid and binding obligation of such Credit Party enforceable against
         such Credit Party in accordance with its terms except as the
         enforcement thereof may be subject to (i) the effect of any applicable
         bankruptcy, insolvency, reorganization, moratorium or similar laws
         affecting creditors' rights generally and (ii) general principles of
         equity (regardless of whether enforcement is sought in a proceeding in
         equity or at law); and

                  (b) after giving effect to this Amendment, each of the
         representations and warranties contained in the Credit Agreement is
         true and correct in all material respects on and as of the date hereof
         as if made on the date hereof, except to the extent that such
         representations and warranties expressly relate to an earlier date and
         no Default or Event of Default shall have occurred and is continuing.

         4. Conditions To Effectiveness. This Amendment shall be effective upon
satisfaction of the following conditions precedent:

                  (a) This Amendment shall have been executed and delivered by
                  the Agent, Requisite Lenders, Supermajority Revolving Lenders
                  and the Credit Parties;

                  (b) The execution and delivery of the Amendment No. 5 to
                  Second Lien Credit Agreement, in form, substance and manner
                  satisfactory to the Agent;

                  (c) Agent shall have received each of the agreements,
                  documents, certificates, opinions or other instruments listed
                  on the closing checklist attached hereto as Exhibit A, each
                  duly executed by the parties thereto (as applicable) and each
                  in form and substance satisfactory to Agent; and

                  (d) The Agent shall have received, on behalf of each Lender
                  who has executed this Amendment, a nonrefundable amendment fee
                  equal to 0.50% of such Lender's Commitment, which fee shall be
                  fully earned and payable on the date hereof.

         5. Reference To And Effect Upon The Credit Agreement.

                  (a) The Credit Agreement and the other Loan Documents shall
         remain in full force and effect, as amended hereby, and are hereby
         ratified and confirmed.

                  (b) The execution, delivery and effectiveness of this
         Amendment shall not operate as a waiver of any right, power or remedy
         of Agent or any Lender under the Credit Agreement or any Loan Document,
         nor constitute a waiver or amendment of any provision of the Credit
         Agreement or any Loan Document, except as specifically set forth
         herein.

                                       11

<PAGE>

        Upon the effectiveness of this Amendment, each reference in the Credit
        Agreement to "this Credit Agreement," "hereunder," "hereof," "herein" or
        words of similar import shall mean and be a reference to the Credit
        Agreement as amended hereby.

         6. Governing Law. THIS AMENDMENT SHALL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH THE INTERNAL LAWS OF THE STATE OF NEW YORK.

         7. Headings. Section headings in this Amendment are included herein for
convenience of reference only and shall not constitute a part of this Amendment
for any other purposes.

         8. Counterparts. This Amendment may be executed in any number of
counterparts, each of which when so executed shall be deemed an original, but
all such counterparts shall constitute one and the same instrument.

         9. Reaffirmation of Guaranties. The Credit Parties signatory hereto
hereby reaffirm their Guaranties of the Obligations and reaffirm that the
Obligations are and continue to be secured by the security interest granted by
the Credit Parties in favor of the Agent, on behalf of itself and the Lenders,
under the Security Agreement and the Pledge Agreement and all of the terms,
conditions, provisions, agreements, requirements, promises, obligations, duties,
covenants and representations of the Credit Parties under such documents and
agreements entered into with respect to the obligations under the Credit
Agreement are incorporated herein by reference and are hereby ratified and
affirmed in all respects by the Credit Parties. Each Credit Party acknowledges
that all references to "Credit Agreement" and "Obligations" in the Loan
Documents shall take into account the provisions of this Amendment and be a
reference to the "Credit Agreement" and the "Obligations" as amended hereby.

                                      * * *

                                       12

<PAGE>

       AMENDMENT NO. 5 AND LIMITED WAIVER TO SECOND LIEN CREDIT AGREEMENT

                  This AMENDMENT NO. 5 AND LIMITED WAIVER TO SECOND LIEN CREDIT
AGREEMENT (this "AMENDMENT"), dated as of February 22, 2008, by and among RADNET
MANAGEMENT, INC., a California corporation (the "BORROWER"), the other persons
designated as Credit Parties on the signature pages hereof, GENERAL ELECTRIC
CAPITAL CORPORATION, a Delaware corporation, as agent ("AGENT") and the Persons
signatory thereto from time to time as Lenders. Unless otherwise specified
herein, capitalized terms used in this Amendment shall have the meanings
ascribed to them in the Credit Agreement (each as hereinafter defined).

                                    RECITALS
                                    --------

         WHEREAS, the Borrower, the Credit Parties, Agent and Lenders have
entered into that certain Second Lien Credit Agreement dated as of November 15,
2006 (as amended by that certain (i) Limited Waiver and Amendment No. 1 to
Second Lien Credit Agreement dated as of April 5, 2007, (ii) Amendment No. 2 to
Second Lien Credit Agreement dated as of May 30, 2007, (iii) Amendment No. 3 to
Second Lien Credit Agreement dated as of August 23, 2007 and (iv) Amendment No.
4 to Second Lien Credit Agreement dated as of December 3, 2007, and as further
amended, supplemented, restated or otherwise modified from time to time, the
"CREDIT AGREEMENT"); and

         WHEREAS, the Borrowers, Agent and Supermajority Lenders have agreed to
the amendments and limited waiver as set forth herein;

         NOW THEREFORE, in consideration of the mutual execution hereof and
other good and valuable consideration, the parties hereto agree as follows:

              1. AMENDMENTS TO CREDIT AGREEMENT.

                      (a) AMENDMENT TO SECTION 1.1. SECTION 1.1 of the Credit
Agreement is hereby amended and restated to (i) be renumbered as SECTION 1.1(a)
and (ii) read in its entirety as follows:

                  "(a) TERM LOAN C. Subject to the terms and conditions of this
         Agreement and in reliance upon the representations and warranties of
         Borrower and the other Credit Parties contained herein, the Term
         Lenders made a term loan to the Borrower on the Closing Date, in the
         aggregate principal amount of $135,000,000. Subject to the terms and
         conditions of this Agreement and in reliance upon the representations
         and warranties of Borrower and the other Credit Parties contained
         herein, each Term Lender agrees, severally and not jointly, to lend to

<PAGE>

         Borrower in one draw, on the Amendment No. 5 Closing Date an amount
         such that, after giving effect to such loan, the amount of each Term
         Loan C (as defined below) held by each Term Lender shall be as set
         forth opposite such Lender's name in ANNEX B. Amounts borrowed under
         this Section 1.1 are collectively referred to as the "INITIAL TERM LOAN
         C" and together with any Incremental Term Loan (as defined below), the
         "TERM LOAN C". The outstanding principal balance of the Term Loan C
         shall be due and payable in full on the Term Loan C Maturity Date.
         Amounts borrowed under this SECTION 1.1(a) and repaid may not be
         reborrowed.

                  At the request of the applicable Lender, such Lender's Term
         Loan C shall be evidenced by promissory notes substantially in the form
         of EXHIBIT 1.1(a) (as amended, modified, extended, substituted or
         replaced from time to time, each a "TERM NOTE C" and, collectively, the
         "TERM NOTES C"), and, except as provided in SECTION 1.7, Borrower shall
         execute and deliver each Term Note C to the applicable Lender. Each
         Term Note C shall represent the obligation of Borrower to pay the
         amount of the applicable Lender's Term Loan C Commitment, together with
         interest thereon."

                      (b) AMENDMENT TO SECTION 1.1. SECTION 1.1 of the Credit
Agreement is hereby amended by inserting the following new clause (b):

                  "(b) INCREMENTAL TERM LOANS.

                  (i) Borrower may make up to five requests for an incremental
         term loan (the "INCREMENTAL TERM LOAN"), each such request being for at
         least $5,000,000, and in an aggregate amount not to exceed $25,000,000
         for all such requests pursuant to delivery of a written request from
         the Borrower to the Agent; PROVIDED, HOWEVER that (i) no Incremental
         Term Loan shall be permitted to be made later than forty-five (45) days
         after the Amendment No. 5 Closing Date and (ii) Borrower will deposit
         into the Segregated Account the first $14,100,000 of Incremental Term
         Loans borrowed pursuant to this Section 1.1(b)(i) which amounts will be
         used in accordance with Section 3.25 hereof. Each such notice shall
         specify the date (an "INCREASE EFFECTIVE DATE") on which the Borrower
         proposes that the increased or new Term Loan C Commitments shall be
         effective, which date shall be a date not less than ten (10) Business
         Days after such request is delivered to the Agent. The increased or new
         Term Loan C Commitments shall become effective on the applicable
         Increase Effective Date as long as each of the following conditions
         have been met:

                                    (A) no Default or Event of Default has
         occurred or is continuing or would result after giving effect to such
         Incremental Term Loan;

                                    (B) the maturity date of any Incremental
         Term Loan, the weighted average life of any Incremental Term Loan, the
         effective yield to the Lenders under such Incremental Term Loan
         (including interest, fees received ratably by such Lenders and original

                                       2
<PAGE>

         issue discount) shall be the same as the Initial Term Loan C, as
         applicable, at the time such Incremental Term Loan is funded;

                                    (C) the Borrower has provided evidence
         reasonably satisfactory to the Agent that the Borrower would have been
         in compliance with the financial covenants set forth in SECTION 6
         assuming that the Incremental Term Loan had been incurred on the last
         day of the then most recently completed Fiscal Quarter; and

                                    (D) the Agent shall have received amendments
         to this Agreement and the Loan Documents, joinder agreements for any
         new Lenders, and all other promissory notes, agreements, documents and
         instruments reasonably satisfactory to the Agent in its reasonable
         discretion evidencing and setting forth the conditions of the
         Incremental Term Loan.

                  (ii) Each Lender which (a) holds a Term Loan C on the date the
         Borrower delivers a written request to the Agent for a Incremental Term
         Loan and (b) notifies the Agent in writing within five (5) days of
         receipt of written notice from the Agent that Borrower has requested an
         Incremental Term Loan shall have the right to fund its pro rata share
         of the Incremental Term Loan based upon its share of the Term Loan C
         Commitment as of the date the Agent originally received the applicable
         notice from the Borrower. Notwithstanding anything contained herein or
         otherwise to the contrary, no Lender shall have any obligation to fund
         all or any portion of, or participate in, the Incremental Term Loan.
         Amounts of the Incremental Term Loan which are repaid may not be
         reborrowed.

                  (iii) On any Increase Effective Date on which Incremental Term
         Loans are effected, subject to the satisfaction of the foregoing terms
         and conditions, (A) each Lender with an Incremental Term Loan (each, an
         "INCREMENTAL TERM LOAN LENDER") shall make a Loan to the Borrower in an
         amount equal to the amount of the Incremental Term Loan such Lender has
         committed to fund and (B) each Incremental Term Loan Lender shall
         become a Lender hereunder with respect to the Incremental Term Loan.
         Amounts of the Incremental Term Loan repaid may not be reborrowed.

                  (iv) Each of the Borrower, Lenders and Agent acknowledges and
         agrees that an Incremental Term Loan (and related amendments and
         documents described in clause (iii) above) meeting the conditions set
         forth in this SECTION 1.1(b) shall not require the consent of any
         Lender other than those Lenders, if any, which have agreed to
         participate in the Incremental Term Loan."

                                       3
<PAGE>

                      (c) AMENDMENT TO SECTION 1.2(a). SECTION 1.2(a) of the
Credit Agreement is hereby amended by (i) replacing the term "6.00%" with the
term "8.00%" and (ii) replacing the term "7.50%" with the term "9.00%" therein.

                      (d) AMENDMENT TO SECTION 1.3(a). SECTION 1.3(a) of the
Credit Agreement is hereby amended and restated to read in its entirety as
follows:

                  "FEE LETTER. Borrower shall pay to GE Capital, individually,
         the Fees specified in that certain fee letter dated as of June 27, 2006
         among Borrower and GE Capital, as supplemented by that certain
         Supplemental Fee Letter dated as of the Amendment No. 5 Closing Date
         (collectively, the "GE CAPITAL FEE LETTER"), at the times specified for
         payment therein."

                      (e) AMENDMENT TO SECTION 1.3(f). SECTION 1.3(f) of the
Credit Agreement is hereby amended and restated to read in its entirety as
follows:

                  "PREPAYMENT FEE. If the Borrower prepays (for any reason
         (including any mandatory prepayment or acceleration)) all or any
         portion of the Term Loan C on or prior to the third anniversary of the
         Amendment No. 5 Closing Date, Borrower shall pay to Agent, for the
         ratable benefit of Lenders, as liquidated damages and compensation for
         the costs of being prepared to make funds available hereunder, an
         amount equal to the product of (i) the Applicable Percentage multiplied
         by (ii) the aggregate principal amount of the Term Loan C being prepaid
         (the "PREPAYMENT FEE"). As used herein, the term "Applicable
         Percentage" shall mean (x) three percent (3.0%), in the case of a
         prepayment on or prior to the first anniversary of the Amendment No. 5
         Closing Date, (y) two percent (2.0%), in the case of a prepayment after
         the first anniversary of the Amendment No. 5 Closing Date but on or
         prior to the second anniversary thereof and (z) one percent (1.0%), in
         the case of a prepayment after the second anniversary of the Amendment
         No. 5 Closing Date but on or prior to the third anniversary thereof.
         The Credit Parties agree that the Prepayment Fee is a reasonable
         calculation of Lenders' lost profits in view of the difficulties and
         impracticality of determining actual damages resulting from prepayment
         of the Term Loan C."

                      (f) AMENDMENT TO SECTION 1.5(d). SECTION 1.5(d) of the
Credit Agreement is hereby amended and restated to read in its entirety as
follows:

                  "PREPAYMENTS FROM ISSUANCE OF SECURITIES; SEGREGATED ACCOUNT.
         Except to the extent applied as a prepayment of the First Lien Loan
         Obligations, immediately upon the receipt by Holdings, Borrower or any
         of its Subsidiaries of the proceeds of the issuance of Stock, Borrower
         shall prepay the Term Loan C in an amount equal to fifty percent (50%)
         of such proceeds, net of underwriting discounts and commissions and
         other reasonable out-of-pocket costs associated therewith. The payments
         shall be applied in accordance with SECTION 1.5(e). Notwithstanding the

                                       4
<PAGE>

         foregoing, the following proceeds of stock issuance shall be excluded
         from any mandatory prepayment: (i) proceeds of issuances of Stock by
         Holdings or Borrower on or prior to the Closing Date, (ii) proceeds of
         issuances of Stock of Holdings (and options and warrants for the
         issuance of Stock of Holdings) to employees and directors of Holdings,
         Borrower or Beverly and proceeds from the exercise of options and
         warrants by employees and directors and (iii) proceeds of issuances of
         Stock by any Subsidiary of Borrower to Borrower which constitutes an
         Investment permitted hereunder. Except to the extent applied as a
         prepayment of the First Lien Loan Obligations, (i) on the one hundred
         twentieth day following the Amendment No. 5 Closing Date, the Borrower
         shall prepay the Term Loan C, in accordance with SECTION 1.5(e), in an
         amount equal to 100% of the remaining funds in the Segregated Account
         which were deposited in the Segregated Account on the Amendment No. 5
         Closing Date and have not been used to pay the purchase price of the
         Strategic Initiatives and (ii) on the one hundred twentieth day
         following the date on which any additional funds are deposited into the
         Segregated Account, the Borrower shall prepay the Term Loan C, in
         accordance with SECTION 1.5(e), in an amount equal to 100% of the
         remaining funds in the Segregated Account which were deposited on such
         date and have not been used to pay the purchase price of the Strategic
         Initiatives."

                      (g) AMENDMENT TO SECTION 3.7(b). SECTION 3.7(b) of the
Credit Agreement is hereby amended by amending and restating the first sentence
thereof to read in its entirety as follows:

                  "Borrower shall utilize the proceeds of the Term Loan C solely
         for Strategic Initiatives approved in writing by the Agent, to repay
         the Revolving Loan (as defined in the First Lien Credit Agreement), and
         for the financing of Borrower's ordinary working capital and general
         corporate needs."

                      (h) AMENDMENT TO SECTION 3. SECTION 3 of the Credit
Agreement is hereby amended by inserting the following new SECTION 3.25 at the
end thereof:

         "3.25 SEGREGATED ACCOUNT. As of the Amendment No. 5 Closing Date,
         Borrower has deposited into deposit account number 112813519 at City
         National Bank $17,271,000 ("Segregated Account") which (i) funds (along
         with any additional funds deposited into the Segregated Account within
         forty-five (45) days of the Amendment No. 5 Closing Date) will be used
         solely to (A) pay for Strategic Initiatives approved in writing by the
         Agent or (B) repay Loans hereunder as required by Section 1.5(d) and
         (ii) will be subject to a Control Agreement. The Agent shall have sole
         dominion and control of the Segregated Account and shall withdraw funds
         therefrom (i) upon the written request of the Borrower, to pay for
         Strategic Initiatives approved in writing by the Agent or (ii) to repay
         Loans as required by SECTION 1.5(d) (and the Borrower hereby
         acknowledges that the Agent may, without notice to the Borrower,
         withdraw funds from the Segregated Account for the purposes set forth
         in this sentence)."

                                       5
<PAGE>

                      (i) AMENDMENT TO SECTION 5.1(f). SECTION 5.1(f) of the
Credit Agreement is hereby amended by replacing the amount "$20,000,000" which
appears therein with "$25,000,000".

                      (j) AMENDMENT TO SECTION 5.6(v). SECTION 5.6(v) of the
Credit Agreement is hereby amended and restated to read in its entirety as
follows:

                  "(v) the sum of all amounts payable in connection with any
         Permitted Acquisition (including the purchase price, all transaction
         costs and all Indebtedness, liabilities and Contingent Obligations
         incurred or assumed in connection therewith or otherwise reflected on a
         consolidated balance sheet of Borrower and Target) shall not exceed
         $20,000,000 and the sum of such amounts payable in connection with all
         Permitted Acquisitions shall not exceed $100,000,000, and the portion
         thereof allocable to goodwill and intangible assets for all such
         Permitted Acquisitions during the term hereof shall not exceed
         $60,000,000."

                      (k) AMENDMENT TO SECTION 6.1(a). SECTION 6.1(a) of the
Credit Agreement is hereby amended and restated to read in its entirety as
follows:

                  "CAPITAL EXPENDITURE LIMITS. Holdings and its Subsidiaries on
         a consolidated basis shall not make Capital Expenditures during the
         following periods that exceed the aggregate amounts set forth opposite
         each of such periods (the "CAPEX LIMIT"):

                  PERIOD                         MAXIMUM CAPITAL EXPENDITURES
                  ------                         ----------------------------
                                                 PER PERIOD
                                                 ----------
                  Fiscal Year 2007                           $44,000,000
                  Fiscal Year 2008 and each                  $52,000,000
                  Fiscal Year thereafter

                  PROVIDED, HOWEVER, that the Capex Limit referenced above will
         be increased in any period by an amount equal to 50% of the difference
         obtained by taking the Capex Limit for the immediately prior period
         (excluding any Capex Carry Over Amounts) MINUS the actual amount of any
         Capital Expenditures expended during such prior period (the "CAPEX
         CARRY OVER AMOUNT"), and for purposes of measuring compliance herewith,
         the Capex Carry Over Amount shall be deemed to be the last amount spent
         on Capital Expenditures in that succeeding period; PROVIDED FURTHER
         that (i) the Capex Limit for Fiscal Year 2008 shall be reduced by the
         positive difference, if any, between (A) the actual amount of Capital
         Expenditures expended during Fiscal Year 2007 minus (B) the Capex Limit
         for Fiscal Year 2007 and (ii) that the Capex Carry Over Amount for any
         Fiscal Year shall not exceed $10,000,000."

                                       6
<PAGE>

                      (l) AMENDMENT TO SECTION 6.1(c). SECTION 6.1(c) of the
Credit Agreement is hereby amended and restated to read in its entirety as
follows:

                  "MINIMUM FIXED CHARGE COVERAGE RATIO. Holdings and its
         Subsidiaries shall have on a consolidated basis at the end of each
         Fiscal Quarter set forth below, a Fixed Charge Coverage Ratio for the
         12-Fiscal Month period then ended of not less than the following.

                 1.10     for the Fiscal Quarters ending December 31, 2006,
                          2006 and March 31, 2007;
                 1.05     for the Fiscal Quarter ending June 30, 2007;
                 1.00     for each Fiscal Quarter ending after June 30, 2007
                          but on or prior to December 31, 2011; and
                 1.10     for each Fiscal Quarter ending thereafter."

                      (m) AMENDMENT TO SECTION 6.1(e). SECTION 6.1(e) of the
Credit Agreement is hereby amended and restated to read in its entirety as
follows:

                  "MAXIMUM LEVERAGE RATIO. Holdings and its Subsidiaries on a
                  consolidated basis shall have, at the end of each Fiscal
                  Quarter set forth below, a Leverage Ratio as of the last day
                  of such Fiscal Quarter and for the 12-Fiscal Month period then
                  ended, of not more than the following:

                 4.60    for the Fiscal Quarters ending December 31,
                         2006 and March 31, 2007;
                 4.95    for the Fiscal Quarter ending June 30, 2007;
                 5.05    for the Fiscal Quarter ending September 30,
                         2007;
                 5.25    for the Fiscal Quarters ending December 31, 2007,
                         March 31, 2008, June 30, 2008 and September 30, 2008;
                 5.00    for the Fiscal Quarters ending December 31, 2008 and
                         March 31, 2009;
                 4.75    for the Fiscal Quarter ending June 30, 2009 and
                         September 30, 2009;
                 4.50    for the Fiscal Quarters ending December 31, 2009, March
                         31, 2010 and June 30, 2010;
                 4.25    for the Fiscal Quarters ending September 30, 2010 and
                         December 31, 2010;
                 3.50    for the Fiscal Quarters ending March 31, 2011, June
                         30, 2011, September 30, 2011 and December 31, 2011;
                 3.25    for the Fiscal Quarters ending March 31, 2012, June
                         30, 2012, September 30, 2012 and December 31, 2012;
                         and
                 3.00    for the Fiscal Quarter ending March 31, 2013 and for
                         each Fiscal Quarter ending thereafter."

                                       7
<PAGE>

                      (n) AMENDMENT TO SECTION 6.1(f). SECTION 6.1(f) of the
Credit Agreement is hereby amended and restated to read in its entirety as
follows:

                  "MAXIMUM SENIOR LEVERAGE RATIO. Holdings and its Subsidiaries
                  on a consolidated basis shall have, at the end of each Fiscal
                  Quarter set forth below, a Senior Leverage Ratio as of the
                  last day of such Fiscal Quarter and for the 12-Fiscal Month
                  period then ended, of not more than the following:

                 3.05    for the Fiscal Quarter ending December 31, 2006;
                 3.10    for the Fiscal Quarter ending March 31,
                         2007;
                 3.20    for the Fiscal Quarter ending June 30, 2007;
                 3.25    for the Fiscal Quarter ending September 30, 2007;
                 3.40    for the Fiscal Quarters ending December 31, 2007, March
                         31, 2008, June 30, 2008, September 30, 2008 and
                         December 31, 2008;
                 3.25    for the Fiscal Quarters ending March 31, 2009, June 30,
                         2009, September 30, 2009 and December 31, 2009;
                 3.00    for the Fiscal Quarters ending March 31, 2010, June 30,
                         2010, September 30, 2010 and December 31, 2010;
                 2.75    for the Fiscal Quarter ending March 31, 2011 and for
                         each Fiscal Quarter ending thereafter."

                      (o) AMENDMENT TO SECTION 6.2(a)(i). SECTION 6.2(a)(i) of
the Credit Agreement is hereby amended and restated to read in its entirety as
follows:

                      (p) "As soon as available and in any event within
forty-five (45) days (or if Holdings files an extension with the Securities &
Exchange Commission, fifty (50) days; PROVIDED, that Borrower has given Agent a
written explanation forty-five (45) days after the end of the applicable Fiscal
Quarter of Holdings, in form and substance reasonably acceptable to Agent,
regarding the need for such extension) after the end of each Fiscal Quarter
(excluding the last Fiscal Quarter of Holdings' Fiscal Year), Borrower will
deliver (1) the consolidated and consolidating balance sheets of Holdings and
its Subsidiaries, as at the end of such quarter, and the related consolidated
and consolidating statements of income, stockholders' equity and cash flow for
such Fiscal Quarter and for the period from the beginning of the then current
Fiscal Year of Holdings to the end of such Fiscal Quarter, (2) a report setting
forth in comparative form the corresponding figures for the corresponding
periods of the previous Fiscal Year and the corresponding figures from the most
recent Projections for the current Fiscal Year delivered pursuant to SECTION
6.2(h) and (3) a schedule of the outstanding Indebtedness for borrowed money of
Holdings and its Subsidiaries describing in reasonable detail each such debt
issue or loan outstanding and the principal amount and amount of accrued and
unpaid interest with respect to each such debt issue or loan."

                                       8
<PAGE>

                      (q) AMENDMENT TO SECTION 8.2(m). SECTION 8.2(m) of the
Credit Agreement is hereby amended by adding "AND (E) AUTHORIZES AND INSTRUCTS
THE AGENT ON ITS BEHALF TO ENTER INTO THE FIRST AMENDMENT TO INTERCREDITOR
AGREEMENT AS SECOND LIEN AGENT (AS DEFINED THEREIN) AND ON BEHALF OF SUCH
LENDER" after clause (D) in the first sentence thereof.

                      (r) AMENDMENT TO SECTION 9.2(b). SECTION 9.2(b) of the
Credit Agreement is hereby amended by inserting the following sentence at the
end thereof: "No amendment, modification, termination or waiver of or consent
with respect to any provision of any Loan Document appropriate (as reasonably
determined by the Agent) to evidence or implement an Incremental Term Loan,
shall be effective unless the same shall be in writing and signed by Agent,
Borrower, and Incremental Term Loan Lender, as applicable; PROVIDED, HOWEVER,
that any amendment to SECTION 1.1(b) shall require the written consent of the
Required Lenders."

                      (s) AMENDMENTS TO ANNEX A. ANNEX A of the Credit Agreement
is hereby amended by inserting the following defined terms in their appropriate
alphabetical order:

                            (1) "AMENDMENT NO. 5 CLOSING DATE means February 22,
                            2008."

                            (2) "DELAWARE IMAGING" means Delaware Imaging
                            Partners, Inc., a Delaware corporation.

                            (3) "FIRST AMENDMENT TO INTERCREDITOR AGREEMENT"
                            means that certain First Amendment to Intercreditor
                            Agreement, dated February 22, 2008, among the Agent,
                            the First Lien Agent and the Credit Parties.

                            (4) "INCREASE EFFECTIVE DATE" has the meaning
                            ascribed to it in SECTION 1.1(b).

                            (5) "INCREMENTAL TERM LOAN" has the meaning ascribed
                            to it in SECTION 1.1(B).

                            (6) "INCREMENTAL TERM LOAN LENDER" has the meaning
                            ascribed to it in SECTION 1.1(b).

                            (7) "SEGREGATED ACCOUNT has the meaning ascribed to
                            it in SECTION 3.25."

                                       9
<PAGE>

                            (8) "STRATEGIC INITIATIVES means any acquisitions,
                            investments, or other initiatives taken by Borrower
                            and approved in advance in writing by the Agent."

                            (9) "NEW IMAGING CENTER" means, as of any date of
                            determination, any new imaging center which has been
                            open for business for less than (12) months.

                            (10) "NEW IMAGING CENTER EBITDA" means with respect
                            to any New Imaging Center for any period (a
                            "Measurement Period"), the product of (I) the
                            "center level profit or loss" of such New Imaging
                            Center determined in accordance with GAAP for the
                            period (the "Annualization Period") from and
                            including the date such New Imaging Center opened
                            through and including the last day of the
                            Measurement Period MULTIPLIED BY (II) a number
                            obtained by DIVIDING 365 by the number of days in
                            the Annualization Period.

                      (t) AMENDMENTS TO ANNEX A.

                            (1) ANNEX A of the Credit Agreement is hereby
                            amended by amending and restating the following
                            definitions to each read in its entirety as follows:

                   "LENDERS means GE Capital, the other Lenders named on the
         signature pages of the Agreement, and, if any such Lender shall decide
         to assign all or any portion of the Obligations, such term shall
         include any assignee of such Lender, and any other financial
         institution that becomes a party hereto by execution of a joinder
         agreement (in connection with any Incremental Term Loans or otherwise)
         and any assignee of such Lender."

                  "TERM LOAN C COMMITMENT means (a) as to any Lender, the
         commitment of such Lender to make its Pro Rata Share of the Term Loan C
         (as set forth on ANNEX B (as supplemented by SUPPLEMENTAL ANNEX B to
         the Agreement)) in the maximum aggregate amount set forth in SECTION
         1.1(a) or in the most recent Assignment Agreement, if any, executed by
         such Lender and the commitment of such Lender to make Incremental Term
         Loans, which commitment is in the amount set forth in the applicable
         joinder agreement, or in the most recent Assignment Agreement, if any,
         executed by such Lender and (b) as to all Lenders, the aggregate
         commitment of all Lenders to make the Term Loan C. The Term Loan C
         Commitment with respect to each Term Loan C shall reduce automatically
         by the amount prepaid or repaid in respect of such Term Loan C (but
         solely by the amount of such prepayment or repayment allocable to a
         Lender, for purposes of clause (a) of this definition)."

                                       10
<PAGE>

                            (2) ANNEX A of the Credit Agreement is hereby
                            amended by replacing the phrase "Telerate Page 3750"
                            with the phrase "Reuters Screen LIBOR01 Page" in the
                            definition of "LIBOR Rate" therein.

                      (u) AMENDMENT TO ANNEX B. ANNEX B of the Credit Agreement
is hereby supplemented with the SUPPLEMENTAL ANNEX B attached as ANNEX B to this
Amendment.

                      (v) AMENDMENT TO ANNEX F. ANNEX F is hereby replaced with
the revised ANNEX F attached as ANNEX F to this Amendment.

                      (w) SCHEDULES. Each of SCHEDULES 3.1(a), 3.1(b), 3.10,
3.11, 3.12, 3.14, 3.16, 3.17, 3.18, 3.19, 5.1, and 5.2, to the Credit Agreement
is hereby replaced with the applicable SCHEDULE attached hereto.

                      (x) EXHIBIT 6.2(d) is hereby amended and restated to read
in its entirety as set forth on EXHIBIT 6.2(d) attached hereto.

                      (y) OMNIBUS AMENDMENT TO CREDIT AGREEMENT. Each reference
in the Credit Agreement to "Credit Party", "Credit Parties", and/or "Guarantors"
as applicable, shall be deemed to include a reference to Delaware Imaging.

                  2. LIMITED WAIVER. The Agent and the Lenders hereby waive any
breach or violation of the Credit Agreement (and any resulting Event of Default)
to the extent arising solely from the failure of Holdings and its Subsidiaries
to comply with the limitation on the maximum amount of Capital Expenditures
permitted for the Fiscal Year ending 2007 set forth in SECTION 6.1 of the Credit
Agreement so long as such Capital Expenditures did not exceed $49,000,000
("SPECIFIED DEFAULT").

The waiver set forth above shall be limited precisely as written and shall not
be deemed or otherwise construed to constitute a waiver of any other Default or
other Event of Default or any other provision of the Credit Agreement or any
other Loan Document or to prejudice any right, power or remedy which any Agent
or any Lender may now have or may have in the future under or in connection with
the Credit Agreement or any other Loan Document (after giving effect to this
Agreement), all of which rights, powers and remedies are hereby expressly
reserved by the Agents and Lenders.

                  3. REPRESENTATIONS AND WARRANTIES OF CREDIT PARTIES. The
Credit Parties represent and warrant that:

                      (a) the execution, delivery and performance by each Credit
         Party of this Amendment have been duly authorized by all necessary
         corporate action required on its part and this Amendment is a legal,
         valid and binding obligation of such Credit Party enforceable against
         such Credit Party in accordance with its terms except as the
         enforcement thereof may be subject to (i) the effect of any applicable
         bankruptcy, insolvency, reorganization, moratorium or similar laws
         affecting creditors' rights generally and (ii) general principles of
         equity (regardless of whether enforcement is sought in a proceeding in
         equity or at law); and

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                      (b) after giving effect to this Amendment, each of the
         representations and warranties contained in the Credit Agreement is
         true and correct in all material respects on and as of the date hereof
         as if made on the date hereof, except to the extent that such
         representations and warranties expressly relate to an earlier date and
         no Default or Event of Default shall have occurred and is continuing.

                  4. CONDITIONS TO EFFECTIVENESS. This Amendment shall be
effective upon satisfaction of the following conditions precedent:

                     (a) This Amendment shall have been executed and delivered
                     by the Agent, Supermajority Lenders and the Credit Parties;

                     (b) The execution and delivery of the Amendment No. 5 to
                     Credit Agreement, in form, substance and manner
                     satisfactory to the Agent;

                     (c) Agent shall have received each of the agreements,
                     documents, certificates, opinions or other instruments
                     listed on the closing checklist attached hereto as EXHIBIT
                     A, each duly executed by the parties thereto (as
                     applicable) and each in form and substance satisfactory to
                     Agent; and

                     (d) The Agent shall have received, on behalf of each Lender
                     who has executed this Amendment, a nonrefundable amendment
                     fee equal to 0.50% of such Lender's Commitment, which fee
                     shall be fully earned and payable on the date hereof.

                  5. COVENANTS OF LENDERS LISTED ON SUPPLEMENTAL ANNEX B. Each
Lender funding a Term Loan C on the Amendment No. 5 Closing Date which was not a
Lender prior to the Amendment No. 5 Closing Date:

                      (a) appoints and authorizes the Agent to take such action
         as agent on its behalf and to exercise such powers under the Loan
         Documents as are delegated to the Agent by the terms thereof, together
         with such powers as are reasonably incidental thereto; and

                      (b) agrees that as of the Amendment No. 5 Closing Date it
         shall be a party to the Credit Agreement and it shall perform in
         accordance with their terms all obligations that, by the terms of the
         Loan Documents, are required to be performed by it as a Lender.

                  6. REFERENCE TO AND EFFECT UPON THE CREDIT AGREEMENT.

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                      (a) The Credit Agreement and the other Loan Documents
         shall remain in full force and effect, as amended hereby, and are
         hereby ratified and confirmed.

                      (b) The execution, delivery and effectiveness of this
         Amendment shall not operate as a waiver of any right, power or remedy
         of Agent or any Lender under the Credit Agreement or any Loan Document,
         nor constitute a waiver or amendment of any provision of the Credit
         Agreement or any Loan Document, except as specifically set forth
         herein. Upon the effectiveness of this Amendment, each reference in the
         Credit Agreement to "this Credit Agreement," "hereunder," "hereof,"
         "herein" or words of similar import shall mean and be a reference to
         the Credit Agreement as amended hereby.

                  7. GOVERNING LAW. THIS AMENDMENT SHALL BE GOVERNED BY AND
CONSTRUED IN ACCORDANCE WITH THE INTERNAL LAWS OF THE STATE OF NEW YORK.

                  8. HEADINGS. Section headings in this Amendment are included
herein for convenience of reference only and shall not constitute a part of this
Amendment for any other purposes.

                  9. COUNTERPARTS. This Amendment may be executed in any number
of counterparts, each of which when so executed shall be deemed an original, but
all such counterparts shall constitute one and the same instrument.

                  10. REAFFIRMATION OF GUARANTIES. The Credit Parties signatory
hereto hereby reaffirm their Guaranties of the Obligations and reaffirm that the
Obligations are and continue to be secured by the security interest granted by
the Credit Parties in favor of the Agent, on behalf of itself and the Lenders,
under the Security Agreement and the Pledge Agreement and all of the terms,
conditions, provisions, agreements, requirements, promises, obligations, duties,
covenants and representations of the Credit Parties under such documents and
agreements entered into with respect to the obligations under the Credit
Agreement are incorporated herein by reference and are hereby ratified and
affirmed in all respects by the Credit Parties. Each Credit Party acknowledges
that all references to "Credit Agreement" and "Obligations" in the Loan
Documents shall take into account the provisions of this Amendment and be a
reference to the "Credit Agreement" and the "Obligations" as amended hereby.

                                      * * *

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