Usefulness of MR Angiography in Patients with Ischemic Stroke

J Korean Neurol Assoc > Volume 11(3); 1993 > Article

Journal of the Korean Neurological Association 1993;11(3): 293-301.

허혈성 뇌경색 환자에서 자기공명 혈관 조영술의 임상적 유용성

김승현, 김주한,김명호,이병철,송홍기,이길우,배상훈

한양대학교 신경과. 한림대학교 신경과, 방사선과.

Usefulness of MR Angiography in Patients with Ischemic Stroke

Seung-Hyun Kim, M.D., Ju-Han Kim, M.D., Myung-Ho Kim, M.D., Byung-Chul Lee, M.D., Hong-Ki Song, M.D., Kil-Woo Lee, M.D., Sang-Hun Bae, M.D.

Department of Neurology, College of Medicine Hanyang University, Department of Neurology and Radiology, College of Medicine Hallym University

Abstract

Using the 3-D TOF technique of MR angiography, the main intracranial and extracranial vessels of 46 normal controls and 37 patients with ischemic stroke were evaluated. In controls 1 the visibility of internal carotid artery and vertebrobasilar artery was ninety-one percent, and that of the first division of the middle cerebral artery was ninety-four percent. In patient groups, compared with the contrast angiographic findings, the sensitivity of MR angiography in detecting vascular occlusive lesions was 100.0% in anterior circulations, and 80.0% in posterior circulations. But several false positive cases were detected. Which were mainly associated with tortous tuming points of the vessels, and MIP artifacts. In spite of the high sensitivity of MR angiography in detecting vascular abnormalities, the degree of occlusive vascular lesions were more accentuated in MR angiography probably due to MIP artifact. The overestimated rate of vascular stenosis was about 24.6 percent compared with the contrast angiography.