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Wireless Health 2014 Conference Technical Session 4 featuring speaker Adam Samaniego.
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WLSACONVERGENCE SUMMIT
SMARTPHONE BASED RETINAL IMAGING
ADAM SAMANIEGO, COMPUTER VISION AND COMPUTATIONAL IMAGING LAB
Adam Samaniego,
Computer Vision and Computational Imaging Lab
Smartphone based retinal imaging
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Funding: NSF-IIS grant 1116718 and the Norman Hackerman Advanced Research Program
Samaniego, Adam, Vivek Boominathan, Ashutosh Sabharwal, and Ashok Veeraraghavan. “mobileVision: A Face-mounted, Voice-activated, Non-mydriatic Lucky Ophthalmoscope.” Wireless Health 2014.
Billions of Users
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Src: http://www.emarketer.com/Article/Smartphone-Users-Worldwide-Will-Total-175-Billion-2014/1010536
Billions of Cameras
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Src: http://www.emarketer.com/Article/Smartphone-Users-Worldwide-Will-Total-175-Billion-2014/1010536
Just an Image
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Src: http://www.topconmedical.com/products/trcnw8highresolutionnonmydsystem.htm
Overview
• Unmet Healthcare Needs
• mobileVision System
• Emerging W.H. Ecosystem
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Problem
• Diabetes: the leading cause of new U.S. cases of blindness among adults ages 20–74
• 80% Chance of developing diabetic retinopathy
• Complications are 90% preventable through early detection, but require frequent retinal screening
Src: http://diabetes.niddk.nih.gov/dm/pubs/statistics/#fast, scohen125 and calhoun16 on retinagallery.com
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Problem
• Macular Degeneration: causes vision loss by destroying macula, ages 60+ at higher risk
• Global cost of over $300 Billion
• Can progress quickly and vision loss is irreversible; can be slowed if detected early, as by retinal screening
Src: http://www.myretinalinstitute.com/images/, https://www.nei.nih.gov/eyedata/amd.asp, http://www.eyeconsultants.net/UserFiles/severe_mac_gen.jpg
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Topcon TRC-NW8
• ±45°field-of-view
• 24.5kg, > $10,000
• Easy to use
• Representative of clinical retinal imaging standard
Src: http://www.topconmedical.com/products/trcnw8highresolutionnonmydsystem.htm
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mobileVision
• ±45°(stitched)
• 1kg, w/ smartphone
• Portable, face-mounted
• Algorithmic pipeline
• Improve robustness
• Mitigate artifacts
• Stitch final panorama
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Optics: Overview
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Fixation Targets
LED Coupled Fiber
Imaging Lenses
Left Eye
Right Eye
SmartphoneCamera
Illumination Lens
Mirror
CrossedPolarizers
User Interface
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Example Images
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Feature Matching
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Single-view Fusion
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Fused Views
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Stitching
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Stitching
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Stitching
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10°
±45°
Resolution Testing
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Model Eye with USAF-1951 Res. Chart “retina”
Resolution Testing
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Modulation Transfer Function (As simulated refractive error varies)
• Smartphone auto-focus allows for simulated refractive error between +13D and -6D
(23.5μm line width resolvable at 10% contrast)
Overview
• Unmet Healthcare Needs
• mobileVision System
• Emerging W.H. Ecosystem
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W.H. Ecosystem
• Bastawrous et al.
• Peek Vision
• Pamplona et al.
• EyeNetra
• Myung et al.
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Full references on “References” Slide
Not Just a Phone
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References
• Samaniego, Adam, Vivek Boominathan, Ashutosh Sabharwal, and Ashok Veeraraghavan. "mobileVision: A Face-mounted, Voice-activated, Non-mydriatic Lucky Ophthalmoscope." Wireless Health 2014.
• Peek Vision. (2013). Retrieved October 20, 2014, from http://www.peekvision.org/• EyeNetra - Eye Care for 2.4 billion people in need. (2013, January 1). Retrieved October 20, 2014, from
http://eyenetra.com/product-netrag.html• Myung, David, Alexandre Jais, Lingmin He, Mark S. Blumenkranz, and Robert T. Chang. "3D Printed Smartphone Indirect Lens
Adapter for Rapid, High Quality Retinal Imaging." Journal of Mobile Technology in Medicine 3, no. 1 (2014): 9-15.
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WLSACONVERGENCE SUMMIT
www.wirelesshealth2014.org