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Abstract #1876

Fast Multichannel Transmit Array Calibration Using Coil Locators

Parnian Zarghamravanbakhsh1, John M Pauly1, and Greig Scott1

1Electrical Engineering, Stanford University, Stanford, CA, United States

Accurate knowledge of magnetic field distribution is necessary for RF shimming and calibration of parallel transmit systems. The incident field distribution depends on relative location of transmit array to sample, also magnitude and phase of coil current(thereby, magnetic field) vary with different sample loading. The RF maps of each coil can be estimated by localizing the transmit array in the image space and circulating RF currents in each coil. In this study, parallel transmit system RF shimming pulses are designed by using transmit coils locator information and coil current measurement without performing experimental B1 mapping.

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