Tele-ophthalmic screening using digital imaging devices.
作者信息
Yogesan K, Constable I J, Eikelboom R H, van Saarloos P P
机构信息
Lions Eye Institute, Centre for Ophthalmology and Visual Science, University of Western Australia, Nedlands, Australia.
出版信息
Aust N Z J Ophthalmol. 1998 May;26 Suppl 1:S9-11. doi: 10.1111/j.1442-9071.1998.tb01385.x.
BACKGROUND
Digital imaging systems provide immediate, magnified images that can easily be analysed, enhanced, archived, printed on near photographic-quality paper and transferred electronically to remote computers. We have assembled a digital ophthalmic system and tested it on patients with some common causes of blindness: corneal scarring and cataract, diabetic retinopathy, macular degeneration and glaucoma.
METHODS
Digital images were obtained using a variety of ophthalmic imaging devices ranging from slit-lamp, fundus camera, indirect ophthalmoscope and scanning laser ophthalmoscope. These images were compressed in order to concentrate image information (image size reduced by 90-95%) and minimize transmission time (reduced by 97-98%). Standard or mobile telephone lines were used to transmit images to remote terminals.
RESULTS/DISCUSSION: Transmission time was reduced from 15-20min to 20-30s and the image size was reduced from 1.3 MB to 20-30 kB by compressing the images before transmission. Image quality is still excellent.
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