【摘要】 目的研究CT扫描及其后处理技术对主动脉夹层瘤(AD)的诊断价值。方法以本院20 3年3月-2015年12月收治的4 5例AD患者为研究对象,均行多层螺旋CT(MSCT)检查,同时利用多平面重组(MPR)、容积再现(VR)等不同图像后处理技术三维重建。观察记录AD分型、真假腔、内膜初始破口大小、数目等情况,并比较不同图像后处理技术对AD破口检出率。结果 Debakey分型:Ⅰ型8例,Ⅱ型5例,Ⅲ型32例。45例AD患者中真腔密度明显大于假腔密度占92.9%;假腔直径明显大于真腔占94.6%;破口清晰显示占87.5%。MPR破口显示率92.8%,真假腔显示率96.4%,内膜瓣显示率1 00.0%;CPR破口显示率96.4%,真假腔显示率98.2%,内膜瓣显示率100.0%;MIP不显示AD破口及内膜瓣,真假腔显示率76.8%;VR破口、真假腔、内膜瓣显示率分别为23.2%、100.0%、98.2%。MPR、CPR破口显示率明显高于VR(P<0.05),且真假腔显示率明显高于MIP(P<0.05)。结论 MSCT在AD诊断上有较大的价值,且MPR、CPR相比其他后处理技术在AD破口、真假腔、内膜瓣显示上更有优势。更多还原

【Abstract】 Objective To study the diagnostic value of CT scan and its postprocessing techniques in aortic dissection aneurysm(AD).Methods 56 cases of AD patients who were admitted in our hospital between March 2013 and December 2015 were selected as the study objects.All of them underwent multi-slice spiral CT(MSCT) examination.Meanwhile,multiple planar reconstruction(MPR),volume rendering(VR) and other different image postprocessing techniques were used for three-dimensional reconstruction.AD type,true and false lumens,size and number of intimal initial rupture were observed and recorded.The detection rates of different image postprocessing techniques in AD rupture were compared.Results Debakey typing:there were type Ⅰ 12 cases,type Ⅱ 7cases and type Ⅲ 37 cases.In 56 patients with AD,the density of true lumen significandy larger than that of the false one accounted for 92.9%;Diameter of false lumen significandy larger than that of the true lumen accounted for 94.6%;Clear display of rupture accounted for 87.5%.The display rates of MPR for rupture,true and false lumens and intimal flap were 92.8%,96.4%.and 100.0%respectively;The display rates of CPR for rupture,true and false lumens and intimal flap were 96.4%,98.2%and 100.0%respectively;MIP did not display AD rupture and intimal flap while the display rate for true and false lumens was 76.8%.The display rates of VR for rupture,true and false lumens and intimal flap were 23.2%,100.0%and 98.2%respectively.The display rates of MPR and CPR were significantly higher than that of VR(P<0.05),and the display rates for true and false lumens were significandy higher than that of MIP(P<0.05).Conclusion MSCT is of great value in diagnosis of AD.Besides,MPR and CPR have more advantages in displaying AD rupture,true and false lumens and intimal flap,compared with other image postprocessing techniques.更多还原