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Abstract #2183

RF Transmit Calibration for DCE-MRI

Yannick Bliesener1, Yi Guo1, Xinran Zhong2, Ryan Bosca3, Kyung Hyun Sung2, and Krishna S. Nayak1

1Electrical Engineering Department, University of Southern California, Los Angeles, CA, United States, 2Department of Radiological Sciences & Physics and Biology in Medicine IDP, University of California, Los Angeles, Los Angeles, CA, United States, 3Imaging Physics, Sanford Health, Fargo, ND, United States

Spatial inhomogeneity in the transmitted RF introduces bias and increased variance in quantitative DCE-MRI metrics, which can dominate all other sources of error if uncorrected. The amount and pattern of inhomogeneity depends on the RF coil geometry, the driving circuits, and the vendor-specific pre-scan calibration. In this work, we (1) constructed human tissue-mimicking torso and brain phantoms, (2) measured and compared the spatial RF transmit inhomogeneity across different scanners, vendors, and sites, and (3) evaluated vendor-recommended methods for RF transmit measurement.

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