Comparison of Deep Brain Stimulation Lead Targeting Accuracy and Procedure Duration between 1.5- and 3-Tesla Interventional Magnetic Resonance Imaging Systems: An Initial 12-Month Experience.
Interventional magnetic resonance imaging (iMRI) allows deep brain stimulator lead placement under general anesthesia. While the accuracy of lead targeting has been described for iMRI systems utilizing 1.5-tesla magnets, a similar assessment of 3-tesla iMRI procedures has not been performed.



To compare targeting accuracy, the number of lead targeting attempts, and surgical duration between procedures performed on 1.5- and 3-tesla iMRI systems.



Radial targeting error, the number of targeting attempts, and procedure duration were compared between surgeries performed on 1.5- and 3-tesla iMRI systems (SmartFrame and ClearPoint systems).



During the first year of operation of each system, 26 consecutive leads were implanted using the 1.5-tesla system, and 23 consecutive leads were implanted using the 3-tesla system. There was no significant difference in radial error (Mann-Whitney test, p = 0.26), number of lead placements that required multiple targeting attempts (Fisher's exact test, p = 0.59), or bilateral procedure durations between surgeries performed with the two systems (p = 0.15).



Accurate DBS lead targeting can be achieved with iMRI systems utilizing either 1.5- or 3-tesla magnets. The use of a 3-tesla magnet, however, offers improved visualization of the target structures and allows comparable accuracy and efficiency of placement at the selected targets.
Department of Neurological Surgery, University of California, San Francisco, Calif., USA.
Derek G
DG
Southwell
Jared A
JA
Narvid
Alastair J
AJ
Martin
Salman E
SE
Qasim
Philip A
PA
Starr
Paul S
PS
Larson
D000328:Adult; D046690:Deep Brain Stimulation / Q000379:methods / Q000592:standards*; D004421:Dystonia / Q000000981:diagnostic imaging / Q000601:surgery*; D005260:Female; D006801:Humans; D064795:Intraoperative Neurophysiological Monitoring / Q000379:methods / Q000592:standards*; D053783:Magnetic Resonance Imaging, Interventional / Q000379:methods / Q000592:standards*; D008297:Male; D061646:Operative Time; D010300:Parkinson Disease / Q000000981:diagnostic imaging / Q000601:surgery*; D013997:Time Factors