J Korean Neurol Assoc.  1997 Aug;15(4):738-744.

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

• Kim J
• Kim JM

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.

MeSH Terms

Carotid Artery, Internal*
Cerebral Angiography
Humans
Magnetic Resonance Angiography
Magnetic Resonance Imaging*
Ophthalmic Artery