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ECG-optimized phase contrast line-scanned MR angiography

✍ Scribed by F. R. Korosec; C. A. Mistretta; P. A. Turski

Publisher
John Wiley and Sons
Year
1992
Tongue
English
Weight
936 KB
Volume
24
Category
Article
ISSN
0740-3194

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✦ Synopsis

Abstract

We describe a rapid phase contrast line scan MR angiographic imaging technique. A projection angiogram is obtained by sequentially imaging a series of thin slices oriented perpendicular to the primary flow direction. Bipolar gradient subtraction is employed to suppress signal from static tissues, which in turn allows elimination of phase encoding in the depth dimension. The sequence is cardiac gated to improve image quality and to allow observation of hemodynamics. To further improve image quality, the amplitude of the bipolar gradient is altered throughout the cardiac cycle to provide maximum vessel signal at all cardiac phases. The ECG‐gated phase contrast line scan sequence has been used to image regions where cardiac pulsatility and respiratory motion compromise the quality of images obtained using standard spin warp angiographic methods. © 1992 Academic Press, Inc.

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