Portable, low-priced retinal imager for eye disease screening
| Autor: | Sheila C Nemeth, E. S. Barriga, Richard VanNess, Gilberto Zamora, Peter Soliz |
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| Rok vydání: | 2014 |
| Předmět: |
Autofocus
business.industry Computer science Image quality Eye disease ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION Retinal Field of view Diabetic retinopathy medicine.disease law.invention chemistry.chemical_compound chemistry law medicine Computer vision Artificial intelligence business Retinal scan |
| Zdroj: | Ophthalmic Technologies XXIV. |
| ISSN: | 0277-786X |
| Popis: | The objective of this project was to develop and demonstrate a portable, low-priced, easy to use non-mydriatic retinal camera for eye disease screening in underserved urban and rural locations. Existing portable retinal imagers do not meet the requirements of a low-cost camera with sufficient technical capabilities (field of view, image quality, portability, battery power, and ease-of-use) to be distributed widely to low volume clinics, such as the offices of single primary care physicians serving rural communities or other economically stressed healthcare facilities. Our approach for Smart i-Rx is based primarily on a significant departure from current generations of desktop and hand-held commercial retinal cameras as well as those under development. Our techniques include: 1) Exclusive use of off-the-shelf components; 2) Integration of retinal imaging device into low-cost, high utility camera mount and chin rest; 3) Unique optical and illumination designed for small form factor; and 4) Exploitation of autofocus technology built into present digital SLR recreational cameras; and 5) Integration of a polarization technique to avoid the corneal reflex. In a prospective study, 41 out of 44 diabetics were imaged successfully. No imaging was attempted on three of the subjects due to noticeably small pupils (less than 2mm). The images were of sufficient quality to detect abnormalities related to diabetic retinopathy, such as microaneurysms and exudates. These images were compared with ones taken non-mydriatically with a Canon CR-1 Mark II camera. No cases identified as having DR by expert retinal graders were missed in the Smart i-Rx images. |
| Databáze: | OpenAIRE |
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