Optimized 4D flow MRI Processing for Evaluation of Abdominal Blood Flow
Eric James Keller1, Jeremy Douglas Collins1, Cynthia K Rigsby2, James C Carr1, Michael Markl1,3, and Susanne Schnell1
1Radiology, Northwestern University, Chicago, IL, United States, 2Radiology, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, IL, United States, 3Biomedical Engineering, Northwestern University, Evanston, IL, United States
4D flow MRI quantification of abdominal hemodynamics is
challenged by a wide range of blood flow velocities and vessel diameters. By
adjusting critical pre-processing steps required to analyze 4D flow MRI data,
we were able to both recover vessels of interest lost by our previous method
and significantly reduce the relative error in flow measurements. We conclude
that it is critical to apply background phase error correction prior to any
other filters and/or corrections to ensure accurate background offset
estimation. Additionally, low venc acquisitions should not be noise corrected to
ensure low flow data is not inadvertently deleted.
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