Fast 3D Algorithm for Coil Localization as an Aid in Estimation of B1 Distribution

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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