摘要
目的分析主动脉夹层(AD)真假腔的CT征象。方法 30例AD患者均行16层CT胸腹联合平扫和增强扫描,采用多平面重组,重点观察和评价AD的真假腔、内膜片的CT表现。结果鸟嘴征30例,蜘蛛网征4例,均位于假腔;75%～100%的假腔直径大于真腔腔内血栓16例位于假腔,1例位于真腔;偏心性内膜片钙化12例,均位于真腔侧;外壁钙化20例位于真腔,3例位于假腔;平直的内膜片在慢性AD假腔中多见(91.7%)。结论鸟嘴征、假腔大于真腔、腔内血栓及偏心性内膜钙化有助于AD真假腔的鉴别。
Objective To analyze the CT features of the true or false lumen of aortic dissection （AD）. Methods Pre- and post-contrast CT scanning with 16-slice spiral CT of chest and abdomen were performed in 30 patients with aortic dissection. Multi-planar reformation （MPR） was applied. The main attention was put on the CT findings of true or false lumen, the flap of aortic dissection. Results Beak sign was seen in all cases, and cobwebs were present in four cases, and these signs were seen only in the false lumen. The larger lumen was the false lumen in 75%~100% of the cases. Intraluminal thrombus was seen in the false lumen in 16 cases, and in the true lumen in one case. Eccentric flap calcification was present in 12 cases, and this sign was only in the side of flap facing true lumen. Outer wall calcification was present in true lumen in 20 cases and in the false lumen in three cases. The flap was usually flat for chronic dissections（91.7%）. Conclusion Beak sign, the larger lumen, intraluminal thrombus and eccentric flap calcification is helpful in distinguishing false lumen from true lumen.
出处
《中国CT和MRI杂志》
2011年第1期13-15,24,共4页
Chinese Journal of CT and MRI
