American Journal of Roentgenology, Vol 170, 883-888, Copyright © 1998 by American Roentgen Ray Society

ARTICLES

Detection of coronary stenoses on source and projection images using three-dimensional MR angiography with retrospective respiratory gating: preliminary experience

PK Woodard, D Li, EM Haacke, PJ Dhawale, S Kaushikkar, B Barzilai, AC Braverman, PA Ludbrook, AN Weiss, JJ Brown, SA Mirowitz, TK Pilgram and FR Gutierrez
Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, MO 63110, USA.

OBJECTIVE: Our objective was to study the ability of three-dimensional MR angiography with retrospective respiratory gating to reveal stenoses in proximal coronary arteries on source and projection images. CONCLUSION: Proximal coronary artery stenoses can be identified using three-dimensional MR angiography with retrospective respiratory gating, both with projection images and on source images alone. Reasons for missed lesions included collateral vessels and retrograde flow distal to complete occlusion and volume averaging of vessels with adjacent structures. Causes of false-positive interpretations included small foci of decreased signal intensity distal to complete occlusion, partial volume effects on individual partitions, and regions of distal vessels leaving the imaging plane.
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