Abstract #4313

B1 vector field mapping through multi-orientation B1+ measurements

Seung-Kyun Lee^1,2 and Sukhoon Oh³

¹Department of Biomedical Engineering, Sungkyunkwan University, Suwon, Republic of Korea, ²IBS Center for Neuroscience Imaging Research, Suwon, Republic of Korea, ³Bioimaging Research Team, Korea Basic Science Institute, Cheongju, Republic of Korea

We present theory and experimental validation of reconstruction of all three components of RF vector magnetic field (B1 vector) in MRI. Using eight-orientation B1+ magnitude mapping, the magnitudes and relative phases of all Cartesian components of B1 vector can be unambiguously determined. The method is demonstrated on a phantom in a birdcage transmit coil with a standard B1+ mapping sequence at 3T. Our method can be used to validate assumptions in MR-based electrical properties tomography (MR-EPT) and specific absorption rate (SAR) modeling.

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