Abstract #2587

Temporal Dynamics and Sampling Rate Effects for Background Phase Estimates in 4D Flow MRI

Michael Loecher¹, Peng Hu¹, and Daniel B Ennis^1,2

¹Department of Radiological Sciences, University of California, Los Angeles, CA, United States, ²Biomedical Physics, University of California, Los Angeles, CA, United States

4D Flow phase contrast MRI acquisitions inherently require a measure of background phase to remove phase contributions from non-velocity based components. The temporal dynamics of this background phase are not well understood. Consequently, the background phase may be measured too infrequently or too often for accurate and/or time efficient measurements. The purpose of this work was: 1) to measure the temporal dynamics of the background phase with high temporal resolution; and 2) to demonstrate methods of selecting time optimal background phase sampling strategies that improve the measurement efficiency of 4D Flow acquisitions.

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