Alastair Martin1, Paul Larson2, Philip Starr2
1Radiology, University of California - San Francisco, San Francisco, CA, USA; 2Neurosurgery, University of California - San Francisco, San Francisco, CA, USA
We compare the targeting accuracy of conventional stereotactic methods to MR guided methods for implanting deep brain stimulator electrodes. MR guidance is found to produce statistically superior accuracy, as determined by the difference between the intended versus actual electrode tip location, in all directions other than depth, which was not significant. For MR guided procedures a correlation was found between higher trajectory angle in the coronal plane and greater lateral offsets. There were otherwise no statistically significant correlations between potential predictors of accuracy and measured outcomes.