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Abstract #2831

A Fast Sampled Projection Method for Assessing Coil Configuration Impact on SAR

Amit Hochman1, Jorge Fernandez Villena2, Luis Miguel Silveira2, Elfar Adalsteinsson1, 3, Lawrence L. Wald3, 4, Jacob K. White1, Luca Daniel1

1Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA, United States; 2INESC ID Instituto de Engenharia de Sistemas e Computadores Investigao e Desenvolvimento, Lisbon, Portugal; 3Harvard-MIT Division of Health Sciences Technology, Cambridge, MA, United States; 4Department of Radiology, Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, MA, United States

We propose a method for combining electromagnetic field solutions obtained for a small set of excitations so as to approximate the solutions for nearby excitations. This work is relevant for coil and excitation design.

Keywords

accuracy adaptive adaptively added approximate approximation arbitrary around assessing assumed audience basis best biomedical body choice choosing chosen circle coil coils combination combined combining committed components compute computed computing conditioned configuration configurations consider correction cost described determine determines dipole dipoles directed discrete distributed drops duke easily effectively electric electromagnetic empirical enriching entire equality error errors estimating evaluate evaluated evaluating every everywhere exact example excitation excitations excite exciting expensive exploit fast field fields form formed full function general good greedy guaranteed head health hence hollow hospital immediately incident inside instead interpolating interpolation inverse just known laboratory latter least make mapping matrix midway model moreover multiplying necessary needs normalized numerical particularly percent physicists placed positions precomputed problem projecting projection proposed radiology radius reduce requires resolution sample sampling sciences sensitivity simple slightly solution solutions solver spacing spots squares strategy summary support takes target technology template translates useful wave white wide yield yielding yields zero