11/30/21, 2:15 PM

RealView Debuts Interference-based Volumetric Holography for Medical Applications

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1 week ago

RealView Debuts
Interference-based
Volumetric Holography for
Medical Applications(/article/displaydaily/realview-debutsinterference-basedvolumetric-holographyfor-medical-applications)

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11/30/21, 2:15 PM

RealView Debuts Interference-based Volumetric Holography for Medical Applications

Israeli start-up RealView Imaging (https://realviewimaging.com/) has now confirmedthat their medical imaging device, called the Holoscope-i, has received FDAclearance. This is a big milestone for the company which has been working on its
holographic-based device for over seven years. To be clear, this is not aneyeglasses-style device but rather a boom-mounted head-up display (HUD) thesurgeon or interventionalist uses for 3D visualization and 3D interaction during
imaging-guided minimally invasive medical procedures.

The FDA clearance is “general” which means it can be used for a variety of imaging
modalities. However, RealView is concentrating on cardiac imaging to start. Besides
the 3D visualization technology, the system allows for interaction with the volumetricdata via direct hand-hologram interface, voice commands and a wireless 3D control
device.
According to the company, this is the first-in-the-world commercial system that is truly
implementing interference-based real-time volumetric holography on a commercial
scale. This technology provides physicians with a hyper-realistic and natural user
experience, allowing them to view and interact with real-time 3D medical hologramsof the patient’s anatomy floating in free space in front of the operator, prior to andduring the procedure.

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RealView Debuts Interference-based Volumetric Holography for Medical Applications

This is not a stereoscopic system so it should not suffer from any vergenceaccommodation concerns, even when used at hands-reach and for many hours ofwork. And, by boom-mounting the device, there is no extra weight on the surgeon’s
head, although it does require them to be within the viewing cone of the device.
The system uses Intel RealSense hand tracking technology with RealView software
control and a high-end eye tracking electro-optical system implemented in the
Holoscope-i system that was developed by RealView. One of their promotional
videos showed how a surgeon could view the dynamic hologram and use his hand torotate, mark and track where an implantable device has to go inside the heart.
The display technology is based on a specially-modified spatial light modulator (SLM)
illuminated by red, green and blue coherent light sources. Speckle reduction isaccomplished with multiple technologies and is said to not be a concern any more.
According to CEO and Co-Founder Shaul Gelman, the system uses eye tracking at ahigh frequency to first calculate the exact location of the viewer’s pupils. Special
electro-optics and software helps to improve the accuracy to 1/3mm. This information
is used to help keep the image spatially aligned exactly to where the eyes would
naturally expect the volume to appear. As many of the medical users use regulareyeglasses, the Holoscope-i system was designed with a generous eye relief
supporting users with or without optical eyeglasses.
Next, the incoming volumetric data (3D/4D ultrasound, 3DCT, etc.) is processed inreal-time to create a series of slices in the depth direction. Each of these are thentransformed to the frequency domain to create an interference pattern that is written
to the spatial light modulator. Coherent light then interferes with these patterns toreconstruct the full color image planes. The depth of each plane is also encoded into
the interference pattern to create a series of images dense enough to present a
volume 3D display at 60 fps. Additional optics project this image to a hand-reach
range that can vary according to the user preferences.

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11/30/21, 2:15 PM

RealView Debuts Interference-based Volumetric Holography for Medical Applications

Gelman says the system has very high resolution in the x, y and z axes with a 3D
geometric fidelity laterally and in depth supporting the human eye vergence andaccommodation mimicking real life 3D objects. And there is even a light that
illuminates the surgeon’s hand to better visualize and interact with the virtual image
that accurately appears at the very same volume as the interacting hand.

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11/30/21, 2:15 PMRealView Debuts Interference-based Volumetric Holography for Medical Applications

Computation of the interference pattern of medical images is compute intensive, but
Gelman says, that following years of development of an extremely efficient
calculation algorithm, they can now perform the calculations with existing commercialGPUs.
The Digital Light Shaping technology that is used in the Holoscope-i device iscovered by 39 patents in 16 patent families with 28 grated to date. The company has
already engaged with leading surgical centers and has successfully completed a pilot
study with Philips. This involved live 3D holographic visualization and interaction tosupport minimally-invasive heart defect procedures.

RealView Imaging aims to see its systems installed first in cath labs at major
hospitals and clinical centers, which has become the leading market in medical
imaging for implementing 3D technologies. In development is the next version thatwill register and project the holographic image accurately 3D registered within apatient’s closed body to support minimally-invasive Interventional Oncology
procedures. This proprietary holographic capability is based on the same coretechnology and is the only technology which provides the operators with accurate “xray eyes”, allowing them to see the treated organ and the medical tools in true 3D
through the patient while the patient is closed making the patient literally transparent.
(CC (/chris-chinnock))https://www.displaydaily.com/article/display-daily/realview-debuts-interference-based-volumetric-holography-for-medical-applications

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RealView Debuts Interference-based Volumetric Holography for Medical Applications

Chris Chinnock runs Insight Media (https://www.insightmedia.info), an advanced
display and imaging consultancy. He is also executive director of the 8K Association(https://www.8kassociation.com).

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RealView Debuts Interference-based Volumetric Holography for Medical Applications

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