Miller-Thomas Michelle M, West O Clark, Cohen Alan M
Department of Diagnostic and Interventional Imaging, University of Texas Medical School at Houston, 6431 Fannin St, Houston, TX 77030, USA.
Radiographics. 2005 Oct;25 Suppl 1:S133-42. doi: 10.1148/rg.25si055511.
Computed tomographic (CT) angiography is a reliable and convenient imaging modality for diagnosing arterial injuries after blunt and penetrating trauma to the extremities. It is a noninvasive modality that could replace conventional arteriography as the initial diagnostic study for arterial injuries after trauma to the extremities. The technique requires scanning with multidetector helical CT after rapid intravenous injection of iodinated contrast material. The CT angiographic signs of arterial injuries in the extremities are active extravasation of contrast material, pseudoaneurysm formation, abrupt narrowing of an artery, loss of opacification of a segment of artery, and arteriovenous fistula formation. Metallic streak artifact, motion artifact, and inadequate arterial opacification may render a CT angiogram nondiagnostic. Studies have shown the sensitivity of CT angiography to be 90%-95.1% and its specificity 98.7%-100% for detecting arterial injury to the extremities after trauma.
计算机断层扫描（CT）血管造影是诊断四肢钝性和穿透性创伤后动脉损伤的一种可靠且便捷的成像方式。它是一种无创检查方法，可替代传统动脉造影作为四肢创伤后动脉损伤的初始诊断研究。该技术需要在快速静脉注射碘化造影剂后，使用多排螺旋CT进行扫描。四肢动脉损伤的CT血管造影征象包括造影剂的活动性外渗、假性动脉瘤形成、动脉突然狭窄、动脉节段不显影以及动静脉瘘形成。金属条纹伪影、运动伪影和动脉显影不足可能导致CT血管造影无法诊断。研究表明，CT血管造影检测四肢创伤后动脉损伤的敏感性为90% - 95.1%，特异性为98.7% - 100%。
