Godwin J D, Herfkens R L, Skiöldebrand C G, Federle M P, Lipton M J
Radiology. 1980 Jul;136(1):125-33. doi: 10.1148/radiology.136.1.7384486.
Conventional computed tomography (CT) with intravenous contrast injection effectively demonstrates the features of aneurysms of the thoracic aorta (dilatation, calcification, intraluminal thrombus, and displacement and erosion of adjacent structures). In aortic dissection, CT can establish the diagnosis by demonstrating (a) double channels with an intimal flap or (b) displaced intimal calcifications if one channel is thrombosed. Dynamic CT following a contrast bolus shows the relative rate of filling of the true and false channels and demonstrates the intimal flap with optimum clarity. Reformatted CT images (paraxial and oblique) display the entire thoracic aorta in the plane of the arch, resembling an aortogram. CT is noninvasive and can be easily repeated to assess progress. Although aortography is still required prior to surgery in some cases, CT is a safe screening procedure that may avoid some invasive angiographic procedures.
静脉注射造影剂的传统计算机断层扫描（CT）能有效显示胸主动脉瘤的特征（扩张、钙化、腔内血栓形成以及相邻结构的移位和侵蚀）。在主动脉夹层中，CT可通过显示以下情况来确诊：（a）存在内膜瓣的双腔结构；或（b）若一个腔被血栓形成，则显示移位的内膜钙化。静脉注射造影剂后的动态CT可显示真腔和假腔的相对充盈速度，并能以最佳清晰度显示内膜瓣。重组后的CT图像（轴位和斜位）可在主动脉弓平面显示整个胸主动脉，类似于主动脉造影。CT是非侵入性的，且可轻松重复进行以评估病情进展。尽管在某些情况下手术前仍需要进行主动脉造影，但CT是一种安全的筛查方法，可避免一些侵入性血管造影检查。
