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Clinical blood flow quantification with segmented k‐space magnetic resonance phase velocity mapping
Author(s) -
Chatzimavroudis George P.,
Zhang Haosen,
Halliburton Sandra S.,
Moore James R.,
Simonetti Orlando P.,
Schvartzman Paulo R.,
Stillman Arthur E.,
White Richard D.
Publication year - 2003
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/jmri.10231
Subject(s) - magnetic resonance imaging , blood flow , flow (mathematics) , segmentation , cardiac cycle , volume (thermodynamics) , physics , nuclear magnetic resonance , k space , nuclear medicine , biomedical engineering , computer science , radiology , medicine , artificial intelligence , mechanics , cardiology , quantum mechanics
Purpose To evaluate the accuracy of segmented k‐space magnetic resonance phase velocity mapping (PVM) in quantifying aortic blood flow from through‐plane velocity measurements. Materials and Methods Two segmented PVM schemes were evaluated, one with seven lines per segment (seg‐7) and one with nine lines per segment (seg‐9), in twenty patients with cardiovascular disease. A non‐segmented (non‐seg) PVM acquisition was also performed to provide the reference data. Results There was agreement between the aortic flow curves acquired with segmented and non‐segmented PVM. The calculated systolic and total flow volume per cycle from the seg‐7 and the seg‐9 scans correlated and agreed with the flow volumes from the non‐seg scans (differences < 5%). Sign tests showed that there were no statistically significant differences ( P ‐values < 0.05) between the segmented and the non‐segmented PVM measurements. Seg‐9, which was the fastest among the three sequences, provided adequate spatial and temporal resolution (> 10 phases per cycle). Conclusion Segmented k‐space PVM shows great clinical potential in blood flow quantification. J. Magn. Reson. Imaging 2003;17:65–71. © 2002 Wiley‐Liss, Inc.