Clinical blood flow quantification with segmented k-space magnetic resonance phase velocity mapping

✍ Scribed by George P. Chatzimavroudis; Haosen Zhang; Sandra S. Halliburton; James R. Moore; Orlando P. Simonetti; Paulo R. Schvartzman; Arthur E. Stillman; Richard D. White

• Book ID: 102377033
• Publisher: John Wiley and Sons
• Year: 2002
• Tongue: English
• Weight: 419 KB
• Volume: 17
• Category: Article
• ISSN: 1053-1807
• DOI: 10.1002/jmri.10231

✦ Synopsis

Abstract

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.