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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