Abstract #1939

Optimized 4D flow MRI Processing for Evaluation of Abdominal Blood Flow

Eric James Keller¹, Jeremy Douglas Collins¹, Cynthia K Rigsby², James C Carr¹, Michael Markl^1,3, 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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