High-resolution carotid artery MRA: Comparison with fast dynamicac quistion and duplex ultrasound scanning
2002 (English)In: Acta Radiologica, ISSN 0284-1851, E-ISSN 1600-0455, Vol. 43, no 3, 256-261 p.Article in journal (Refereed) Published
PURPOSE: To determine whether the diagnostic accuracy of contrast-enhanced MR angiography (CE-MRA) of the carotid arteries is improved by using a slow-injection, high-resolution technique.
MATERIAL AND METHODS: In 22 patients suspected to have internal carotid artery (ICA) stenosis at duplex ultrasound scanning (DUS), CE-MRA was performed both with a fast, dynamic (8 s/phase) and with a slower, high-resolution technique (scan time 2:20 min).
RESULTS: There was conformity between the CE-MRA techniques regarding the degree of stenosis in 34/40 extracranial ICAs. In 3/6 discrepant cases, short occlusions were seen with the fast dynamic technique, whereas both the high-resolution CE-MRA technique and DUS showed patent vessels. There was an overall tendency toward higher stenosis grading with the dynamic technique. Overlying veins could be removed on a workstation in all high-resolution examinations.
CONCLUSION: The high-resolution carotid CE-MRA technique proposed herein seems to improve the diagnostic accuracy, at least for differentiation between high-grade stenoses and occlusions.
Place, publisher, year, edition, pages
2002. Vol. 43, no 3, 256-261 p.
Medical and Health Sciences
IdentifiersURN: urn:nbn:se:uu:diva-64220PubMedID: 12100321OAI: oai:DiVA.org:uu-64220DiVA: diva2:92131