Print ISSN : 0917-074X
ISSN-L : 0917-074X
超音波断層法 (Bモード) による頸部頸動脈狭窄病変の検討
高瀬 憲作上田 伸松本 圭蔵
ジャーナル フリー

1989 年 2 巻 2 号 p. 70-75


High-resolution real-time sonography (HRS) is usually performed in patients with occlusive cerebrovascular disease. Unfortunately, there is no standard imaging technique for carotid imaging. In this report, an imaging technique for detecting carotid plaques is introduced. At first, to get the most suitable image of the carotid bifurcation in the longitudinal projection, examination was carried out with a 7.5 MHz probe. The probe should maintain constant movement with the same slow speed to detect details of the plaque. The ultrasonic images were recorded with a video tape recorder simultaneously. After that, the most suitable multiple consecutive planes (5 to 7 planes) were re-photographed. Postoperatively, the detailed ultrasonographic images were reviewed and compared with the patho-morphological findings of the planes. A 57-year-old patient with an episode of amaurosis fugax was reported. He had ulcerated and calcified plaques in the left cervical carotid artery. The postoperative macro- and microscopic findings showed good correlations to the display of images at the preoperative ultrasonic examinations. The echo-density of all atheromatous plaques except for those accompanied by calcification, was lower than that of the normal media. It was very difficult to distinguish a true ulceration from a necrosis (or a bleeding space) in the arterial wall. In this case the detailed and consecutive display of the high-resolution B-mode scan was a very useful method to identify a fine structure of atheromatous plaques of the arterial wall in the cervical carotid artery.

© 日本脳神経超音波学会