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Radiology, Vol 198, 449-456, Copyright © 1996 by Radiological Society of North America

ARTICLES

Renovascular disease in patients with hypertension: detection with systolic and diastolic gating in three-dimensional, phase-contrast MR angiography

MW de Haan, M Kouwenhoven, RP Thelissen, D Koster, AG Kessels, PW de Leeuw and JM van Engelshoven
Department of Diagnostic Radiology, University Hospital Maastricht, The Netherlands.

PURPOSE: To evaluate the usefulness of three-dimensional, phase- contrast magnetic resonance (MR) angiography performed with cardiac synchronization in the assessment of renal arteries. MATERIALS AND METHODS: Thirty-eight patients (24 men, 14 women) underwent three- dimensional, phase-contrast MR angiography without gating and with systolic and diastolic gating. Conventional angiography was used as the standard of reference. RESULTS: The sensitivity for the detection of all stenoses (> 0%) was 93% with systolic, 92% with diastolic, and 77% without gating. However, there was no difference between the three techniques in the diagnosis of hemodynamically significant stenoses (> 50%). The mean arterial length depicted was significantly better with diastolic gating than with either of the other techniques (P < .0001). Vascular disease was significantly overestimated with systolic gating relative to estimation without (P = .030) or with diastolic (P = .008) gating. CONCLUSION: Three-dimensional, phase-contrast MR angiography provides good image quality and enables assessment of renovascular disease. Cardiac gating has limited improvement of these results.


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