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Abstract #2498

Local Excitation Important for Breast MR: Signal Energy from Outside the FOV Decreases Contrast Using Non-Cartesian Acquisitions

Matt Smith1, Krishna Kurpad2, Catherine Moran1, Xu Zhai1, Walter Block1,3, Sean Fain1,3

1Medical Physics, University of Wisconsin, Madison, WI, United States; 2Radiology, University of Wisconsin, Madison, WI, United States; 3Biomedical Engineering, University of Wisconsin, Madison, WI, United States

Regardless of the sampling technique, the volume of interest is degraded by excited signal energy outside the FOV. With 3D non-Cartesian acquisitions, the effect is incoherent streaking with noise-like appearance. Commercial receive only breast coils require slice/slab excitation from the body coil, exciting tissue outside the FOV. A local transmit/receive breast coil based on a solenoid design is compared with a commercial receive-only coil to demonstrate that local excitation minimizes the unwanted signal energy contaminating the FOV for non-Cartesian breast MR. Measurements of contrast are higher and more consistent using a 3DPR SSFP sequence with a local transmit/receive breast coil.