印戒征（signet ring sign）(图文)中英文对照

时间：2009-08-25  来源：影像园  作者：admin 【复制分享】【讨论-纠错】【举报】

CT 表现：由代表扩张支气管断面的环形致密影和代表与它伴行的肺动脉的邻近较小致密影组成，类似印（或珍珠）戒，是支气管扩张的基本CT 征象。该征象也见于肺动脉血流异常减少（如近侧肺动脉阻断）或慢性血栓栓塞为特征的疾病。偶尔可见的紧贴支气管的小血管致密影是支气管动脉而不是肺动脉。

CT scans.—This finding is composed of a ring-shaped opacity representing a dilated bronchus in cross section and a smaller adjacent opacity representing its pulmonary artery, with the combination resembling a signet (or pearl) ring  (Fig 1). It is the basic CT sign of bronchiectasis . The signet ring sign can also be seen in diseases characterized by abnormal reduced pulmonary arterial flow (eg, proximal interruption of pulmonary artery  or chronic thromboembolism . Occasionally, the tiny vascular opacity abutting a bronchus is a bronchial, rather than a pulmonary, artery.

Figure 1: Transverse CT scan shows signet ring sign (arrow).

(本文编译参考自Fleischner Society: Glossary of Terms for Thoracic Imaging -- Hansell et al. Radiology 2008;246:697-722.仅供学习交流之用,转载请注明源于影像园http://www.xctmr.com/)

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