Accuracy and availability of the computed assisted neurosurgery navigation system during epilepsy surgery

The magnetic-force-based Computed Assisted Neurosurgery System was used for epilepsy surgery to localize targets accurately in the operative field. The correlation between X components of target coordinates in the axial plane and the coronal plane for the same target was strong in all cases. Concerning Y components, there were statistically significant differences in 2 cases. There was a case that showed statistically significant differences only in the Z dimension. The interdisk distance by data sets of coordinates obtained from neuronavigation was calculated to quantify localization error, and the measuring error ranged from -5 to 13.3 mm (1.3 +/- 3.2 mm). The magnitude of the application errors in this study tended to be large in the frontal and vertex regions.