Liang Keng-Wei, Huang Hsin-Hui, Tyan Yeu-Sheng, Tsao Teng-Fu
Ultrasound Q. 2018 Dec;34(4):268-271. doi: 10.1097/RUQ.0000000000000376.
Ultrasonography (US) is believed to be the most available method of detecting hepatic portal venous gas (HPVG) with real-time imaging capability. Hepatic portal venous gas has characteristic image appearances in various ultrasound modes such as bright mode, Doppler mode, and even motion (M) mode. In this article, we give a comprehensive review of the image appearances of HPVG among different modes of US with a special focus on the M mode US. Hepatic portal venous gas was recognized as linear echogenicities in various oblique directions (the meteor shower sign) on the M mode US. This specific sign may expand some potential of HPVG detection by US.
超声检查（US）被认为是检测肝门静脉气体（HPVG）最常用的实时成像方法。肝门静脉气体在各种超声模式下，如明亮模式、多普勒模式甚至运动（M）模式，都有其特征性的图像表现。在本文中，我们全面综述了不同超声模式下HPVG的图像表现，特别关注M模式超声。在M模式超声上，肝门静脉气体表现为不同倾斜方向的线性回声（流星雨征）。这一特殊征象可能会拓展超声检测HPVG的一些潜力。
