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Abstract #15416 Published in IGR 1-3
Preliminary clinical experience with the Dresden 3D-display as add-on to the Heidelberg Retina Tomograph (HRT)
Müller-Richter DA; Malig HJ; Schwerdtner A; Lang M; Hille K; Ruprecht KWKlinische Monatsblätter für Augenheilkunde 1999; 215: 182-185
BACKGROUND: For years the Heidelberg Retina Tomograph (HRT) has been an established method for diagnosing early glaucomatous damage at the optic nerve head. The major difficult consists of defining the outer layer of the optic nerve head in a two-dimensional reflective or topographic picture. A three-dimensional (3D) presentation of the ocular fundus could ease the defining greatly. The Dresden 3D-display tested provides a true 3D presentation of the HRT values measured. METHODS: For the study, five groups of prediagnosed follow-up examinations were formed, which showed various progression in their courses. Firstly, the examination was carried out by manually defining the papilla contour on the Dresden 3D-display, and then by the new automatic contour finding of the 3D software. RESULTS: Due to the 3D presentation, a more correct position of the contour can be found when it is drawn manually. As a result, some of the 2D diagnoses with the HRT pictures had to be revised. The results proved that there were considerable differences between the automatic outer layer finding and the probable true position of the papillary borders. CONCLUSIONS: The 3D presentation of HRT pictures represents a subjective improvement with regard to the accuracy of manual contour definition. In particular, the fact that it is now feasible to make the pictures rotate around the axes offers a completely new insight into the morphology of the disc.LA: German
Dr. D.A. Müller-Richter, Augenklinik und Poliklinik der Universität des Saarlandes Kirrbergerstrasse 1, D-66421 Homburg (Saar); Germany
Classification:
6.9.1 Laser scanning (Part of: 6 Clinical examination methods > 6.9 Computerized image analysis)
