Magnitude of microelectrode refinement in pallidotomy and thalamotomy.
The relative accuracy of starting point algorithms in microelectrode-guided stereotactic pallidotomy and thalamotomy was evaluated using postoperative magnetic resonance imaging (MRI) data. Multiplanar reformations were performed to align postoperative MRI in anterior-posterior, dorsal-ventral and mediolateral planes. Three-dimensional distance and direction from the pallidal and thalamic stereotactic starting points to the respective radiofrequency lesions were measured. Similar magnitude of microelectrode refinement in pallidotomy and thalamotomy suggested similar accuracy of algorithms used to set the stereotactic starting point. Fewer microelectrode-recording tracts were required to identify optimal lesioning sites in thalamotomy compared to pallidotomy. Lesions were consistently localized anterior and superior to the starting point and a refined starting point algorithm may reduce the number of microelectrode recording tracts.
Milligan
B D
BD
Imaging Resource Center, University of Kansas Medical Center, Kansas City 66160, USA.
Wilkinson
S
S
Overman
J
J
Kirschman
D L
DL
Koller
W C
WC
Pahwa
R
R
Lyons
K E
KE
Batnitzky
S
S
Gordon
M A
MA
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D020820:Dyskinesias / Q000601:surgery; D005260:Female; D005917:Globus Pallidus / Q000601:surgery*; D006801:Humans; D008297:Male; D008839:Microelectrodes / Q000706:statistics & numerical data; D008875:Middle Aged; D013238:Stereotaxic Techniques / Q000295:instrumentation* / Q000706:statistics & numerical data; D013788:Thalamus / Q000601:surgery*