MR-guided stereotaxy in functional neurosurgery.

MR imaging enables the localization of the anteroposterior commissural line, but sometimes it is difficult to define the anterior commissure point. The corpus callosum is more easily identified in this case. We performed an MR imaging using the following methodology; a single transverse scan from which a coronal scan is planned with compensation. A sagittal scan is prescribed from the coronal slice, compensating for any misalignment of patient position. Finally the scan series are prescribed from the sagittal scan, following which we calculate MR distortion. This methodology was used for functional stereotaxy, and the results correlated well with the classical method.