Intraoperative determination and display of cortical function

W. Andrew Bass; Robert L. Galloway Jr.; Benoit M. Dawant; Robert J. Maciunas

doi:10.1117/12.273895

7 May 1997 Intraoperative determination and display of cortical function

W. Andrew Bass, Robert L. Galloway Jr., Benoit M. Dawant, Robert J. Maciunas

Proceedings Volume 3031, Medical Imaging 1997: Image Display; (1997) https://doi.org/10.1117/12.273895
Event: Medical Imaging 1997, 1997, Newport Beach, CA, United States

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.

Citation Download Citation

W. Andrew Bass, Robert L. Galloway Jr., Benoit M. Dawant, and Robert J. Maciunas "Intraoperative determination and display of cortical function", Proc. SPIE 3031, Medical Imaging 1997: Image Display, (7 May 1997); https://doi.org/10.1117/12.273895

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