Use of Brain MRI after Deep Brain Stimulation Hardware Implantation

ABSTRACT The objective of this study was to examine the experience with and safety of brain 1.5 Tesla (T) magnetic resonance imaging (MRI) in deep brain stimulation (DBS) patients. This was a retrospective review of brain MRI scanning performed on DBS patients at the University of Kansas Medical Center between January 1995 and December 2007. A total of 249 DBS patients underwent 445 brain 1.5 T MRI scan sessions encompassing 1,092 individual scans using a transmit-receive head coil, representing the cumulative scanning of 1,649 DBS leads. Patients with complete implanted DBS systems as well as those with externalized leads underwent brain imaging. For the majority of scans, specific absorption rates localized to the head (SARH) were estimated and in all cases SARH were higher than that specified in the present product labeling. There were no clinical or hardware related adverse events secondary to brain MRI scanning. Our data should not be extrapolated to encourage MRI scanning beyond the present labeling. Rather, our data may contribute to further defining safe MRI scanning parameters that might ultimately be adopted in future product labeling as more centers report in detail their experiences.

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