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Proceedings Paper

Reliable identification of sphere-shaped femoral heads in 3D image data
Author(s): Heinrich Martin Overhoff; Sven Ehrich; Ute von Jan
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Paper Abstract

A new method is presented, which enables the reliable measurement of the femoral head sphere parameters (center coordinates and diameter) from tomographic image data, even when the raw data are erroneous. The hip joints of 13 newborns were scanned by a self developed 3-D ultrasound system. After automatic image segmentation, the femoral head is represented by spatially arranged voxel clouds. The 3-D image data are substantially corrupted by different types of errors. Moreover, the data only describe a segment of a sphere, whose area is about 10% of the sphere. This circumstance increases the identification problem. The problem of fitting the sphere parameters is solved by a robust technique based on rejection strategies for irrelevant points and data sets. The method was applicable in 21 of 26 cases. Substantial differences between automatically and expert determined sphere parameters were only observed for highly corrupted data sets, where the identification problem is inherently unstable. The identification method yielded correct and reliable identification of geometric measures from 3-D ultrasound image volumes and promises to be applicable also for other parameterized geometries and other tomographic image modalities as X-ray CT or MRI.

Paper Details

Date Published: 21 May 1999
PDF: 11 pages
Proc. SPIE 3661, Medical Imaging 1999: Image Processing, (21 May 1999); doi: 10.1117/12.348536
Show Author Affiliations
Heinrich Martin Overhoff, Univ. of Hildesheim (Germany)
Sven Ehrich, National Research Ctr. for Environment and Health (Germany)
Ute von Jan, Univ. of Hildesheim (Germany)

Published in SPIE Proceedings Vol. 3661:
Medical Imaging 1999: Image Processing
Kenneth M. Hanson, Editor(s)

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