Abstract #4868
SAR reduction in deep brain stimulation patients using parallel transmission
Bastien Guerin 1 , Sara Sprinkhuizen 1 , Cristen LaPierre 1,2 , Yigitcan Eryaman 1,3 , and Lawrence L Wald 1,4
1
A. A. Martinos Center for Biomedical
Imaging, Dpt. of Radiology, Massachusetts General
Hospital, Charlestown, MA, United States,
2
Dpt.
of Physics, Harvard Univerity, Cambridge, MA, United
States,
3
Madrid-MIT
M+Vision Consortium in RLE, Massachusetts Institute of
Technology, Cambridge, MA, United States,
4
Division
of Health Sciences Technology, Harvard-MIT, Cambridge,
MA, United States
Deep brain stimulation (DBS) is used to treat Parkinson
disease, essential tremor and depression. DBS involves
implanting electrodes permanently in the patients
brain. When placed inside an MRI scanner the DBS lead
heats up because of strong coupling with the RF field,
which is dangerous to the patient. We show in
simulations and phantom experiments that parallel
transmission can excite the MRI signal without creating
significant SAR at the tip of the DBS lead by minimizing
the electric field along the DBS lead wire. Application
of this approach in vivo could elucidate the mechanisms
of action of DBS.
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