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Proceedings Paper

Modeling and segmentation of intra-cochlear anatomy in conventional CT
Author(s): Jack H. Noble; Robert B. Rutherford; Robert F. Labadie; Omid Majdani; Benoit M. Dawant
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Paper Abstract

Cochlear implant surgery is a procedure performed to treat profound hearing loss. Since the cochlea is not visible in surgery, the physician uses anatomical landmarks to estimate the pose of the cochlea. Research has indicated that implanting the electrode in a particular cavity of the cochlea, the scala tympani, results in better hearing restoration. The success of the scala tympani implantation is largely dependent on the point of entry and angle of electrode insertion. Errors can occur due to the imprecise nature of landmark-based, manual navigation as well as inter-patient variations between scala tympani and the anatomical landmarks. In this work, we use point distribution models of the intra-cochlear anatomy to study the inter-patient variations between the cochlea and the typical anatomic landmarks, and we implement an active shape model technique to automatically localize intra-cochlear anatomy in conventional CT images, where intra-cochlear structures are not visible. This fully automatic segmentation could aid the surgeon to choose the point of entry and angle of approach to maximize the likelihood of scala tympani insertion, resulting in more substantial hearing restoration.

Paper Details

Date Published: 5 March 2010
PDF: 9 pages
Proc. SPIE 7623, Medical Imaging 2010: Image Processing, 762302 (5 March 2010); doi: 10.1117/12.844747
Show Author Affiliations
Jack H. Noble, Vanderbilt Univ. (United States)
Robert B. Rutherford, Vanderbilt Univ. (United States)
Robert F. Labadie, Vanderbilt Univ. (United States)
Omid Majdani, Univ. of Hannover (Germany)
Benoit M. Dawant, Vanderbilt Univ. (United States)

Published in SPIE Proceedings Vol. 7623:
Medical Imaging 2010: Image Processing
Benoit M. Dawant; David R. Haynor, Editor(s)

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