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Proceedings Paper

Automatic delineation of the optic nerves and chiasm on CT images
Author(s): Michael Gensheimer; Anthony Cmelak; Kenneth Niermann; Benoit M. Dawant
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Paper Abstract

Delineating critical structures for radiotherapy of the brain is required for advanced radiotherapy technologies to determine if the dose from the proposed treatment will impair the functionality of the structures. Employing an automatic segmentation computer module in the radiation oncology treatment planning process has the potential to significantly increase the efficiency, cost-effectiveness, and, ultimately, clinical outcome of patients undergoing radiation therapy. In earlier work, we have shown that atlas-based segmentation of large structures such as the brainstem or the cerebellum was an achievable objective. We have also shown that smaller structures such as the optic nerves or optic chiasm were more difficult to segment automatically. In this work, we present an extension to this approach in which atlas-based segmentation is followed by a series of additional steps. We show that this new approach substantially improves our previous results. We also show that we can segment CT images alone when we previously relied on a combination of MR and CT images.

Paper Details

Date Published: 3 March 2007
PDF: 10 pages
Proc. SPIE 6512, Medical Imaging 2007: Image Processing, 651216 (3 March 2007); doi: 10.1117/12.711182
Show Author Affiliations
Michael Gensheimer, Vanderbilt Univ. (United States)
Anthony Cmelak, Vanderbilt Univ. (United States)
Kenneth Niermann, Vanderbilt Univ. (United States)
Benoit M. Dawant, Vanderbilt Univ. (United States)


Published in SPIE Proceedings Vol. 6512:
Medical Imaging 2007: Image Processing
Josien P. W. Pluim; Joseph M. Reinhardt, Editor(s)

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