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1 Department of Radiology, Section of Angiography and Interventional Radiology,
University of Vienna, Waehringer Guertel 18-20, A-1090 Vienna, Austria.
2 Department of Angiology, University of Vienna, A-1090 Vienna, Austria.
OBJECTIVE. The purpose of our study was to compare contrast-enhanced moving-bed MR angiography and digital subtraction angiography in the evaluation of peripheral vascular occlusive disease.
MATERIALS AND METHODS. This retrospective report includes 106 patients (45 women, 61 men) with known or suspected peripheral vascular occlusive disease who underwent MR angiography and intraarterial digital subtraction angiography of the peripheral arteries. MR angiography was performed on a 1.0-T unit using a moving-bed technique. Every leg was divided into 14 vascular segments, and severity of disease was scored in four categories. Digital subtraction angiography was the standard of reference.
RESULTS. In the 106 patients, 2378 vessel segments were evaluated
with both imaging modalities. In 2156 segments, MR angiography and digital
subtraction angiography were concordant for stenosis classification, in 188
segments the two modalities differed in one category, and in 24 segments they
differed in two categories. MR angiography achieved sensitivity and
specificity of 96.7% and 95.8%, respectively, for differentiating
nonsignificant from hemodynamically significant stenosis (
= 0.91).
CONCLUSION. This study indicates that MR angiography is an accurate imaging modality in clinical practice. Our data support the concept that MR angiography can modify the diagnosis of suspected peripheral vascular occlusive disease.
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