Temporal Dynamics and Sampling Rate Effects for Background Phase Estimates in 4D Flow MRI
Michael Loecher1, Peng Hu1, and Daniel B Ennis1,2
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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