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Titolo:
RANKED-SEGMENT DISTRIBUTION CURVE FOR INTERPRETATION OF OPTIC-NERVE TOPOGRAPHY
Autore:
ASAWAPHUREEKORN S; ZANGWILL L; WEINREB RN;
Indirizzi:
UNIV CALIF SAN DIEGO,GLAUCOMA CTR LA JOLLA CA 92093 UNIV CALIF SAN DIEGO,GLAUCOMA CTR LA JOLLA CA 92093 UNIV CALIF SAN DIEGO,RES LABS 0946 LA JOLLA CA 92093
Titolo Testata:
Journal of glaucoma
fascicolo: 2, volume: 5, anno: 1996,
pagine: 79 - 90
SICI:
1057-0829(1996)5:2<79:RDCFIO>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
LASER TOMOGRAPHIC SCANNER; AXON DIAMETER; HEAD; REPRODUCIBILITY; GLAUCOMA; NUMBER; COUNT; AGE;
Keywords:
SCANNING LASER OPHTHALMOSCOPY; GLAUCOMA-DIAGNOSIS; OPTIC NERVE HEAD; TOPOGRAPHY; HUMANS; IMAGE PROCESSING, COMPUTER-ASSISTED;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
25
Recensione:
Indirizzi per estratti:
Citazione:
S. Asawaphureekorn et al., "RANKED-SEGMENT DISTRIBUTION CURVE FOR INTERPRETATION OF OPTIC-NERVE TOPOGRAPHY", Journal of glaucoma, 5(2), 1996, pp. 79-90

Abstract

Purpose: The objective of this article was to evaluate whether a new method for analysis of optic nerve topography, the ranked-segment distribution (RSD) curve, can differentiate between normal and glaucoma eyes. Methods: Topographic optic nerve parameters of 39 normal subjects aged 50-79 years were measured using a confocal scanning laser ophthalmoscope (Heidelberg Retina Tomograph). Disc parameters were determinedfrom the mean topography of three images of each eye obtained with a 15 degrees field of view. Rim area and retinal nerve fiber layer cross-section area were measured in 36 segments (each of 10 degrees) aroundthe disc margin. For each parameter, the 36 segments were ranked in descending order and graphically depicted as the RSD curve. In normal eyes, the fifth percentile values for each of the ranked segments were calculated and graphed to compare with glaucoma eyes within the same age group. Evaluation of RSD curves was done automatically with a computer program using predefined criteria. Three primary open-angle glaucoma cases are presented to demonstrate the RSD curve method. Results: In these three glaucoma eyes, RSD curves demonstrated defects more consistently than stereoscopic disc photography, nerve fiber layer photography, and computerized visual field testing. In two cases, RSD curves differentiated between diffuse and localized defect as well as demonstrated the locations of the defects. Conclusion: The RSD curve technique may assist in the interpretation of topographic optic nerve parameters and in the detection of glaucomatous optic neuropathy.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/11/20 alle ore 23:56:28