Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session N52: Biomagnetic Imaging and Sensing
11:30 AM–2:30 PM,
Wednesday, March 8, 2023
Room: Room 308
Sponsoring
Units:
GMED GMAG
Chair: Stephen Russek, NIST Boulder; Samuel Oberdick
Abstract: N52.00008 : Investigation of Soft Magnetic Material Cores in Transcranial Magnetic Stimulation Coils and the Effect of Changing Core Shapes on the Induced Electric Field in Small Animals*
1:42 PM–1:54 PM
Presenter:
Mohannad Tashli
(Dept. of Mechanical and Nuclear Engineering, Virginia Commonwealth University)
Authors:
Mohannad Tashli
(Dept. of Mechanical and Nuclear Engineering, Virginia Commonwealth University)
Ravi L Hadimani
(Virginia Commonwealth University)
George Weistroffer
(Dept. of Biomedical Engineering, Virginia Commonwealth University)
Aryan Mhaskar
(Virginia Commonwealth University)
Deepak Kumbhare
(Dept. of Neurosurgery, Louisiana State University Health Center)
Mark S Baron
(Dept. of Neurology, Virginia Commonwealth University, Richmond)
Finite element analysis of the rat head model is carried out using Sim4life software while investigating variations associated with changing the ferromagnetic core material and shape in the coil. Materials proposed for the analysis in this study include Iron Cobalt Vanadium alloy (Fe-Co-V) also known as Permendur, Carbon Steel (AISI 1010) and Manganese Zinc ferrites (MnZn ferrites). Simulation results indicated significant magnetic field distribution variation when introducing a ferromagnetic core in TMS coil, concentrating the magnetic field to the targeted region in the rat head model without stimulating adjacent regions. It was observed that the v-tip sharpened core attained the highest magnetic field and best focality among other cores in simulations and experimentally.
*Acknowledgment: This study was partially funded by the Merit Review Award, U.S. Department of Veterans Affairs. Dr. Mark Baron. Grant number 2I01BX001147-05A2.Authors acknowledge Commonwealth Cyber Initiative Central Virginia Node Grant # FP00010500.
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