Assessing accuracy of the magnetic resonance imaging-computed tomography fusion images to evaluate the electrode positions in subthalamic nucleus after deep-brain stimulation.

Background: Accurate evaluation of the electrode position in subthalamic nucleus (STN) after deep-brain stimulation (DBS) has rarely been verified before.

Objective: We superimposed the postoperative thin-sliced computed tomography (CT) on the preoperative magnetic resonance imaging (MRI), and the positional information of the implanted electrodes with electrophysiological data was reflected on MRI. The accuracy of this method was assessed by comparing STN demarcated on this method (M-STN) with the electrophysiologically defined STN (E-STN) and with STN on the Schaltenbrand-Wahlen atlas (SW-STN).