主动脉夹层的CT诊断及价值

DIAGNOSIS AND VALUE OF AORTIC DISSECTION USING CT

目的:探讨主动脉夹层的CT诊断及价值。方法:15例主动脉夹层患者全部行螺旋CT平扫及增强扫描并行CT血管成像处理,仔细观察其CT特征。结果:15例主动脉夹层按DaBaKey分型,其中Ⅰ型7例,Ⅲ型8例。CT表现有如下特点:(1)病变主动脉增宽;(2)主动脉腔内有稍弯曲的低密度线状内膜片影;(3)撕裂的内膜片将主动脉分为真/假两腔,其内CT值相同或不相同;(4)多数假腔大,真腔小。结论:增强CT可快捷精确地明确主动脉夹层的诊断,CT血管成像可清晰直观地显示主动脉夹层的形态与范围,CT检查对确定本病的治疗方案及疗效观察有十分重要指导意义。

To evaluate the value of CT in aortic dissection diagnosis. Methods：Plain scan and en- hanced scan of spiral CT were performed in 15 cases of aortic dissection. Results： According to DaBakey classi- fication, 15 cases of aortic dissection include I Type 7 cases, mType 8 cases.The characteristics of aortic dissec- tion included： enlarged aorta , true and false lumen divided by intimal flaps inside the aortic lumen in enhanced scan , CT value of the true and false lumen different or the sames, the true lumen larger and the false lumen smaller in most cases. Conclusion： CT offers a useful and rapid method to diagnose aortic dissection and the three dimensional reconstruction demonstrates aortic dissection directly and briefly.