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Abstract #2751

Multi-Venc measurement of phase contrast MRI for improving accuracy of velocity field

Hojin Ha 1 , Guk Bae Kim 2 , Jihoon Kweon 2 , Young-Hak Kim 3 , Namkug Kim 4,5 , Dong Hyun Yang 4 , and Sang Joon Lee 1

1 Department of Mechanical Engineering, Pohang University of Science and Technology, Pohang, Gyeongbuk, Korea, 2 Asan Institute of Life Science, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea, 3 Department of Cardiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea, 4 Department of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea, 5 Department of Convergence Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea

The present study aims to improve accuracy and noise level of four-dimensional velocity encoding (VENC) MRI by employing multiple VENC parameters. A 4D PC-MRI sequence with five different VENC parameters was employed to measure three dimensional flow field in a stenosis flow phantom. The velocity field from larger VENC value was combined with that of smaller VENC value unless the velocity data are lost by phase-aliasing and phase dispersion. Results showed that multi-VENC overlapping significantly increased accuracy of the flow measurement with reduction of the noise, and wide velocity dynamics range.

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