Routine MR imaging of the internal carotid artery siphon: angiographic correlation with cervical carotid lesions

AJR. American Journal of Roentgenology
M Brant-Zawadzki

Abstract

This study correlates the appearance of the cavernous segment of the carotid artery on MR images with the presence of significant stenosis or occlusion of the cervical carotid artery as seen on angiograms in 100 patients who had brain MR imaging and arteriography within a 1-week period. Four patients demonstrated isointense signal within the carotid artery's cavernous segment; two of these findings correlated with complete carotid occlusion as seen angiographically, while partial compromise was seen angiographically in the other two. Four other patients had variable signal intensity and irregularity of the luminal outline in the carotid siphon, correlating with angiographic evidence of atheromatous disease in three patients and of dissection in one patient. The demonstration of normal signal void within a normal-appearing cavernous segment of the internal carotid artery in the remaining 92 patients correlated with absence of significant stenosis within the cervical segment in 86 patients. In the remaining six, significant disease of the internal carotid artery was found. Isointensity within the intracranial carotid artery can indicate either complete occlusion or very slow flow. Therefore, angiography is still necessary to comp...Continue Reading

Citations

Jan 1, 1992·Cardiovascular and Interventional Radiology·P M RuggieriM T Modic
Jun 30, 2015·International Journal of Stroke : Official Journal of the International Stroke Society·Mirjam R HeldnerUrs Fischer
Jan 1, 1993·Magnetic Resonance Imaging·T KadotaC Kuroda
Feb 20, 2004·Clinical Anatomy : Official Journal of the American Association of Clinical Anatomists & the British Association of Clinical Anatomists·Wolfgang J Weninger, Mathias Prokop

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