128层螺旋CT血管成像及后处理技术诊断主动脉夹层价值

发布时间：2018-08-23 11:50

【摘要】：目的探讨128层螺旋CT血管成像及后处理技术在主动脉夹层(aortic dissection,AD)诊断中的价值。方法疑诊AD患者78例,均行128层螺旋CT血管成像检查,进行容积再现技术(volume rendering technique,VRT)、自由切割成像、多平面重组(multiplanar reformation,MPR)、曲面重建(curved planar reformation,CPR)及最大密度投影(maximum intensity projection,MIP)等后处理。对AD患者行Stanford分型和DeBakey分型,比较动静脉期AD真假腔CT值,及后处理技术对AD内膜破口的显示率。结果 128层螺旋CT血管成像检出AD患者59例,Stanford分型A型21例、B型38例,DeBakey分型Ⅰ型13例、Ⅱ型8例、Ⅲ型38例;动脉期时AD真腔CT值[(257.37±51.79)Hu]高于假腔[(225.76±50.26)Hu],静脉期时AD真腔CT值[(157.39±59.56)Hu]低于假腔[(164.54±57.35)Hu],差异均有统计学意义(P0.05);自由切割成像+轴位对内膜初始破口的显示率为93.22%、自由切割成像为89.83%、CPR为83.05%、MPR为81.36%、轴位为76.27%,明显高于VRT(35.59%)和MIP(13.56%),差异有统计学意义(P0.05)。结论 128层螺旋CT血管成像是术前诊断AD及对AD作出准确分型的可靠影像学检查方法,但其不同后处理技术各有优缺点,对内膜初始破口的显示率不同。
[Abstract]:Objective to evaluate the value of 128-slice spiral CT angiography and postprocessing in the diagnosis of aortic dissection AD. Methods Seventy-eight patients with suspected AD underwent 128-slice spiral CT angiography, (volume rendering technique (VRT), free cutting, multiplanar reformation (MPR), curved surface reconstruction of (curved planar reformation (curved planar) and maximum density projection (maximum intensity). Stanford classification and DeBakey classification were performed in AD patients to compare the CT value of true and false lumen of AD in arteriovenous phase and the display rate of AD intimal rupture by post-processing technique. Results Fifty-nine AD patients were diagnosed by 128-slice spiral CT angiography. Among them, there were 21 cases with type A and 38 cases with type B, 13 cases with type 鈪，

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