Estimation of Occluded Sites and Flow Dynamics in Internal Carotid Artery Obstruction Using Routine Cerebral Magnetic Resonance Imaging and Transcranial Doppler

J Korean Neurol Assoc > Volume 15(4); 1997 > Article

Journal of the Korean Neurological Association 1997;15(4): 738-744.

Magnetic Resonance Imaging과 Transcranial Doppler를 이용한 내경동맥 폐색 위치 및 혈행역학의 예측

김 제, 김재문

충남대학교 의과대학 신경과학교실

Estimation of Occluded Sites and Flow Dynamics in Internal Carotid Artery Obstruction Using Routine Cerebral Magnetic Resonance Imaging and Transcranial Doppler

Jei Kim, M.D., Jae-Moon Kim, M.D.

Department of Neurology, College of Medicine, Chungnam National University, Taejon, Korea

Abstract

The accurate site of occlusion and flow dynamics in the internal carotid artery (ICA) obstruction, that were not visualized on magnetic resonance angiography (MRA) and cerebral angiography (CA), was estimated in three patients using the findings of magnetic resonance imaging (MRI) and transcranial Doppler (TCD). Flow void was shown from the proximal to C1 portion of right ICA on MRI and forward flow in the right ophthalmic artery (OA) was detected on TCD of the first patient. In second patient, high signal intensities at the proximal portion of the left ICA were detected on MRI and away flow from the probe was noted in the left OA on TCD. Flow voids were not shown from the proximal to distal portion of left ICA on MRI of the third patient. No blood flow was detected in the left OA and ICA on TCD in this patient. We can estimate the accurate site of the obstruction, proximal, distal, and entire portion of ICA, in each patient using MRI and TCD.