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Can digitised colour 35 mm transparencies be used to diagnose diabetic retinopathy

George, L. D., Leverton, C., Young, S., Lusty, J., Dunstan, Frank David John and Owens, David Raymond 1997. Can digitised colour 35 mm transparencies be used to diagnose diabetic retinopathy. Diabetic Medicine 14 (11) , pp. 970-973. 10.1002/(sici)1096-9136(199711)14:11%3C970::aid-dia484%3E3.0.co;2-y

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Abstract

Retinal photography is an adjunct to ophthalmoscopy in screening for diabetic retinopathy (DR). Digital retinal cameras allow a retinal image to be displayed immediately on a high resolution video display monitor. We conducted a pilot study to investigate the agreement in retinopathy grading from digitized images in comparison to original colour transparencies as 35 mm slides. One hundred and fifty macula-centred, 45 degree, non-stereoscopic retinal images were digitized onto CD ROM by Kodak at base resolution of 768 x 512 pixels. The anonymized images were displayed on a 17" monitor running Windows at 800 x 600 resolution in 64,000 colours (PC images) and graded in random order. Alternatively the transparencies were graded on a Slidex viewer. A quality control set were also graded with exact agreement in 93% of cases (91% (73/80) of PC images and 94% (75/80) of slide images). Compared to colour transparencies, 95% (84/88) of sight threatening diabetic retinopathy (STDR) and 100% (62/62) of non-STDR cases were diagnosed using the PC. One case of pre-proliferative DR and three cases of non-proliferative DR were graded as non-STDR from the PC. There was good agreement between PC displayed digitized retinal images and 35 mm colour transparencies.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Medicine
Subjects: R Medicine > R Medicine (General)
R Medicine > RZ Other systems of medicine
Publisher: Wiley
ISSN: 0742-3071
Last Modified: 17 May 2019 22:13
URI: http://orca.cf.ac.uk/id/eprint/63843

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