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A Magnetic Resonance Imaging-based Computational Protocol for Analysis of Plaque Morphology and Hemodynamics in Patients with Carotid Artery Stenosis

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Usefulness of acceleration time for internal carotid artery origin stenosis

Hirokazu Tamura¹, Yasuhisa Akaiwa, Kiyoshi Onda

¹Department of Medical Radiology, Niigata Neurosurgical Hospital, Niigata, Niigata, Japan.

Annals of Vascular Diseases

|October 17, 2013

Abstract:

Calcification of the internal carotid artery (ICA) hinders accurate evaluation of the stenosis by conventional ultrasonography due to acoustic shadow. We examined the relationship between acceleration time (AcT) and ICA origin stenosis. One hundred thrity seven samples (266 vessels) that enforced duplex ultrasonography in our hospital were targeted. The results have shown that there is a significant relationship between AcT and stenosis. AcT of more than 110 msec suggests that the stenosis is more than 60% by the North American Symptomatic Carotid Endarterectomy Trial (NASCET) method. AcT is thought to be useful for the diagnosis of ICA stenosis with calcification. (English Translation of J Jpn Coll Angiol 2011; 51: 365-371).

Keywords:

acceleration time internal carotid artery ultrasonography

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