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Abstract #0624

Bilateral Breast Imaging using Split-Symmetric Parallel Transmission

Ryan Brown 1 , Martijn A Cloos 1 , Christian Geppert 2 , Linda Moy 1 , Daniel K Sodickson 1 , and Graham C Wiggins 1

1 The Bernard and Irene Schwartz Center for Biomedical Imaging, Dept. of Radiology, New York University School of Medicine, New York, NY, United States, 2 Siemens Medical Solutions USA Inc., New York, NY, United States

High-field bilateral breast imaging is challenging because of the conflicting requirements of a uniform transmit field and a large field-of-view. This is addressed in the proposed split-symmetric transmission scheme, where symmetries in the body anatomy and coil array are exploited to allow a given RF shim or set of tailored pulses to be replicated across lateral and contralateral coils. This allowed a substantial advantage in the degrees of freedom associated with the transmit optimization problem, and resulted in a uniform excitation over a bilateral field-of-view. Important benefits of this transmit system are that tailored parallel pulses and dedicated lymph node coils provide improved coverage in the posterior breast and in the lymph nodes, both of which have been difficult to visualize at 7T with standard transmit coils.

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