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Automatic Detection of Features in Ultrasound Images of the Eye

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5 Author(s)
Youmaran, R. ; Sch. of Inf. Technol. & Eng., Ottawa Univ., Ont. ; Dicorato, P. ; Munger, R. ; Hall, T.
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In closed angled glaucoma, fluid pressure in the eye increases because of inadequate fluid flow between the iris and the cornea. One important technique to assess patients at risk of glaucoma is to analyze ultrasound images of the eye to detect the structural changes. Currently, these images are analyzed manually. We propose an algorithm to automatically identify clinically important features in the ultrasound image of the eye. The main challenge is stable detection of features in the presence of ultrasound speckle noise; the algorithm addresses this using multiscale analysis and template matching. Tests were performed by comparison of results with eighty images of glaucoma patients and normals against the landmarks identified by a trained technologist. In 5% of cases, the algorithm could not analyze the images; in the remaining cases, features were correctly identified (within 97.5 mum) in 97% of images. This work shows promise as a technique to improve the efficiency of clinical interpretation of ultrasound images of the eye

Published in:

Instrumentation and Measurement Technology Conference, 2005. IMTC 2005. Proceedings of the IEEE  (Volume:3 )

Date of Conference:

16-19 May 2005

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