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Proceedings Paper

Three-dimensional geometric modeling of the cochlea
Author(s): SunKook Yoo; Ge Wang; Jay T. Rubinstein; Michael W. Vannier M.D.
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Paper Abstract

Three-dimensional geometric modeling of the human cochlea not only provides a basis for preoperative planning and postoperative evaluation of cochlear implantation, but also facilitates medical education and training. In this paper, the three-dimensional geometric modeling method of the cochlea has been developed. The central path of the cochlea is extracted from a spiral CT image volume by segmenting the cochlea and tracking through the cochlear canal. The central path is modeled by a helico-spiral. The first component in the helico- spiral model represents the projected central path onto a plane perpendicular to the modiolar axis, while the second component depicts the longitudinal stretching of the central path. A non-linear least square minimization based algorithm is devised for the identification of intrinsic and extrinsic parameters of the helico-spiral representation of the cochlea. Numerical phantoms with added different noise levels up to standard deviation of 2 mm are synthesized according to the average parameters of the human cochlea to evaluate the accuracy. In real human cochlear studies, our model fits into the modiolar axis and the central path very well, allowing the calculation of length, height and angular positions needed for frequency mapping of multi-channel cochlear implant electrodes.

Paper Details

Date Published: 6 June 2000
PDF: 8 pages
Proc. SPIE 3979, Medical Imaging 2000: Image Processing, (6 June 2000); doi: 10.1117/12.387671
Show Author Affiliations
SunKook Yoo, Univ. of Iowa School of Medicine and Yonsei Univ. College of Medicine (United States)
Ge Wang, Univ. of Iowa School of Medicine (United States)
Jay T. Rubinstein, Univ. of Iowa (United States)
Michael W. Vannier M.D., Univ. of Iowa School of Medicine (United States)

Published in SPIE Proceedings Vol. 3979:
Medical Imaging 2000: Image Processing
Kenneth M. Hanson, Editor(s)

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