Renovascular disease in patients with hypertension: detection with systolic and diastolic gating in three-dimensional, phase-contrast MR angiography.
OBJECTIVE
To evaluate the usefulness of three-dimensional, phase-contrast magnetic resonance (MR) angiography performed with cardiac synchronization in the assessment of renal arteries.


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.


CONCLUSIONS
Three-dimensional, phase-contrast MR angiography provides good image quality and enables assessment of renovascular disease. Cardiac gating has limited improvement of these results.
de Haan
M W
MW
Department of Diagnostic Radiology, University Hospital Maastricht, The Netherlands.
Kouwenhoven
M
M
Thelissen
R P
RP
Koster
D
D
Kessels
A G
AG
de Leeuw
P W
PW
van Engelshoven
J M
JM
D000792:Angiography / Q000379:methods; D016477:Artifacts; D005260:Female; D006801:Humans; D006978:Hypertension, Renovascular / Q000175:diagnosis* / Q000000981:diagnostic imaging; D007091:Image Processing, Computer-Assisted; D018810:Magnetic Resonance Angiography / Q000379:methods*; D008297:Male; D008875:Middle Aged; D009200:Myocardial Contraction; D010865:Pilot Projects; D011446:Prospective Studies; D012077:Renal Artery / Q000000981:diagnostic imaging / Q000473:pathology; D012078:Renal Artery Obstruction / Q000175:diagnosis / Q000000981:diagnostic imaging; D012680:Sensitivity and Specificity