Fast 3D Algorithm for Coil Localization as an Aid in Estimation of B1 Distribution
Parnian Zarghamravanbakhsh 1 , John M Pauly 1 , and Greig Scott 1
Electrical Engineering, Stanford University,
Stanford, CA, United States
Prior knowledge of magnetic field distribution is
necessary for RF shimming and calibration.In practice,
sample loading change coil current ,also field pattern
tends to vary with relative location of coil to sample.
In this study, we assess a method to localize transmit
coil in imaging space by placing fiducial markers on
known location of coils. Then the optimal rotation and
translation matrix is calculated for mapping the target
regions from simulation to imaging space. knowing coil
location B1 estimation of region of interest can be
computed by FDTD based simulation. Knowledge of field
pattern estimation along coil current sensor can be used
in auto-calibration PTx systems.
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