Abstract #0174
Reduced Heating of Implanted Electrical Conductors Using Parallel Radiofrequency Transmission
Clare McElcheran 1 , Laleh Golestanirad 2 , and Simon Graham 1,2
1
Medical Biophysics, University of Toronto,
Toronto, ON, Canada,
2
Sunnybrook
Health Science Centre, Toronto, ON, Canada
Deep Brain Stimulation (DBS), a treatment for movement
disorders (eg Parkinsons Disease) consists of leads and
electrodes that send electrical impulses to deep brain
nuclei. During MRI, the electric field (E) created by
radiofrequency (RF) excitation couples with the leads,
amplifies E, and can cause dangerous heating of nearby
tissues. Parallel RF transmission (PTX) is investigated
to suppress heating by varying the amplitude and phase
of each transmit element. In an 8-element PTX with a
uniform cylindrical phantom, E is reduced 97% compared
to a linear birdcage transmitter, with <10% transmit
magnetic field inhomogeneity in the chosen field of
view.
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