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 ORCID: https://orcid.org/0000-0002-1043-5281 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:	27 Oct 2022 08:56
URI:	https://orca.cardiff.ac.uk/id/eprint/63843

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