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Proceedings Paper

Intraoperative determination and display of cortical function
Author(s): W. Andrew Bass; Robert L. Galloway; Benoit M. Dawant; Robert J. Maciunas
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Paper Abstract

One of the most important issues in neurosurgical lesion resection is margin definition. And while there is still some effort required to exactly determine lesion boundaries from tomographic images, the lesions are at least perceptible on the scans. What is not visible is the location of function. Functional imaging such as PET and fMRI hold some promise for cortical function localization; however, intraoperative cortical mapping can provide exact localization of function without ambiguity. Since tomographic images can provide lesion margin definition and cortical mapping can provide functional information we have developed a system for combining the two in our Interactive, Image-Guided system. For cortical surface mapping we need a surface description. Brain contours are extracted from a MRI volume using a deformable model approach and rendered from multiple angular positions. As the surgeon moves a probe, its position is displayed on the view closes to the angular position of the probe. During functional mapping, positive response to stimulation result in a color overlay 'dot' added to the cortical surface display. Different colored dots are used to distinguish between motor function and language function. And a third color is used to display overlapping functionality. This information is used to guide the resection around functionally eloquent areas of the cortex.

Paper Details

Date Published: 7 May 1997
PDF: 8 pages
Proc. SPIE 3031, Medical Imaging 1997: Image Display, (7 May 1997); doi: 10.1117/12.273895
Show Author Affiliations
W. Andrew Bass, Vanderbilt Univ. (United States)
Robert L. Galloway, Vanderbilt Univ. Medical Ctr. and Vanderbilt Univ. (United States)
Benoit M. Dawant, Vanderbilt Univ. (United States)
Robert J. Maciunas, Vanderbilt Univ. and Vanderbilt Univ. Medical Ctr. (United States)


Published in SPIE Proceedings Vol. 3031:
Medical Imaging 1997: Image Display
Yongmin Kim, Editor(s)

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