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Abstract #3105

Changes in RF Transmit Gain Before and After DBS Lead Placement in 36 Consecutive Patients

Matt A. Bernstein1, Heidi A. Ward1, Kiaran P. McGee1, Joel P. Felmlee1, Vicki L. Knudsen1, Krzysztof R. Gorny1, John Huston III1, Kendall H. Lee1

1Mayo Clinic, Rochester, MN, USA

The RF power level, as measured by auto-prescan during 1.5T MRI scanning with a transmit/receive head coil was recorded for 36 consecutive patients before and after placement of one (n = 8) or two (n = 28) deep brain stimulator leads (DBS). The average change in power level was 0.111 +/- 4.65 counts, as measured in units of 1/10 dB. In these units, 30 counts represent a factor two in power. These data suggest that placement of DBS leads does not significantly affect the RF power calibration.