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Abstract #3812

Development of Quadrature Transmit Elements for Breast MRI/MRSI at 7T

Ananda Kumar1, LeRoy Blawat1, Michael Schr2, Peter Barker3

1Resonant Research LLC., Baltimore, MD, United States; 2Philips Healthcare, Cleveland, OH, United States; 3Radiology, Johns Hopkins University, Baltimore, MD, United States

Two critical challenges encountered in the development of MR transmit elements at very high field strengths are RF power deposition and excitation field homogeneity. A quadrature transmit loop elements pair was developed for 7T breast MRI/MRSI using full-wave numerical EM methods. Field homogeneity and SAR values are accurately predicted by the EM methods employed and facilitates in the development of transmit elements for breast MR with improved field homogeneity with appropriate RF safety limits. The performance of the coil was successfully evaluated on an agar gel phantom and on a healthy volunteer.