PURPOSE: To assess three novel digital fundus cameras for diabetic retinopathy (DR) screening. METHODS:Digital colour and red-free retinal imaging (Topcon TRC 50 IA, Canon CR6-45NM, and MediTell) was used to capture 427 images of 70 diabetes patients and control subjects. The images were graded for DR by three readers in a randomized and masked manner using a modified Early Treatment Diabetic Retinopathy Study classification. The reference standard was based on mydriatic ophthalmoscopy and colour and red-free images. RESULTS: Digital 50 degrees red-free imaging had sensitivity of 97.7%, two-field 50 degrees colour imaging 94.0%, and two-field 45 degrees colour imaging sensitivity of 88.9%. The specificity of these imaging modalities was 98.9-100%, and ungradeable images represented 1.2-1.6%. The hand-held digital colour videocamera (MediTell) showed a sensitivity of 6.9% and ungradeable images represented 92.3%. CONCLUSION:Digital 50 degrees red-free and two-field 50 degrees or 45 degrees colour imaging were suitable for DR screening, whereas the hand-held digital videocamera did not fulfil the needs of DR screening.
RCT Entities:
PURPOSE: To assess three novel digital fundus cameras for diabetic retinopathy (DR) screening. METHODS: Digital colour and red-free retinal imaging (Topcon TRC 50 IA, Canon CR6-45NM, and MediTell) was used to capture 427 images of 70 diabetespatients and control subjects. The images were graded for DR by three readers in a randomized and masked manner using a modified Early Treatment Diabetic Retinopathy Study classification. The reference standard was based on mydriatic ophthalmoscopy and colour and red-free images. RESULTS: Digital 50 degrees red-free imaging had sensitivity of 97.7%, two-field 50 degrees colour imaging 94.0%, and two-field 45 degrees colour imaging sensitivity of 88.9%. The specificity of these imaging modalities was 98.9-100%, and ungradeable images represented 1.2-1.6%. The hand-held digital colour videocamera (MediTell) showed a sensitivity of 6.9% and ungradeable images represented 92.3%. CONCLUSION: Digital 50 degrees red-free and two-field 50 degrees or 45 degrees colour imaging were suitable for DR screening, whereas the hand-held digital videocamera did not fulfil the needs of DR screening.
Authors: Jukka M Saari; Tero Kivelä; Paula Summanen; Kari Nummelin; K Matti Saari Journal: Graefes Arch Clin Exp Ophthalmol Date: 2006-12 Impact factor: 3.117
Authors: Kai Yuan Tey; Kelvin Teo; Anna C S Tan; Kavya Devarajan; Bingyao Tan; Jacqueline Tan; Leopold Schmetterer; Marcus Ang Journal: Eye Vis (Lond) Date: 2019-11-18