Hagiwara Yuta, Shimizu Takahiro, Hoshino Masashi, Takao Naoki, Araga Takashi, Hasegawa Yasuhiro
Department of Internal Medicine, Division of Neurology, St. Marianna University School of Medicine, Kawasaki, Japan.
J Clin Ultrasound. 2019 May;47(4):239-242. doi: 10.1002/jcu.22682. Epub 2019 Jan 25.
Transoral carotid ultrasonography (TOCU) is a powerful tool for evaluating internal carotid artery (ICA) lesions located from the carotid bifurcation up to the level of the second cervical vertebra. Superb-microvascular imaging (SMI) is a new Doppler imaging technique whose algorithm analyze tissue movements to minimize motion artifacts by eliminating clutter signals. SMI significantly reduces motion artifacts and allows visualization of low-velocity blood flow even in minute vessels. TOCU with SMI produces clear intraluminal image of the distal extracranial ICA, which is not possible with conventional carotid artery ultrasonography (CUS). CUS with SMI and TOCU with SMI were performed in a patient with a history of carotid artery stenting for symptomatic left ICA stenosis, providing images of the full length of the stents with intimal hyperplasia.
经口颈动脉超声检查（TOCU）是评估从颈动脉分叉至第二颈椎水平的颈内动脉（ICA）病变的有力工具。超微血管成像（SMI）是一种新的多普勒成像技术，其算法通过分析组织运动来消除杂波信号，从而最大限度地减少运动伪像。SMI显著减少运动伪像，甚至能使微小血管内的低速血流可视化。采用SMI的TOCU可产生清晰的颅外ICA远端管腔内图像，这是传统颈动脉超声检查（CUS）无法做到的。对一名有症状性左ICA狭窄且有颈动脉支架置入史的患者进行了采用SMI的CUS和采用SMI的TOCU检查，获得了带有内膜增生的支架全长图像。
