【摘要】 目的:评价猪肠系膜上动脉多层螺旋CT血管造影(MSCTA)的可行性及在栓子定位中的价值。方法:24只巴马猪行MSCTA及DSA检查,12只DSA检查结束后行SMA二级分支栓塞。采用容积再现(VR)、最大密度投影(MIP)、薄层最大密度投影(TSMIP)进行血管三维重建,比较不同重建方法对肠系膜上动脉及其分支的显示能力差别。以DSA为金标准,评估MSCTA在栓子定位中的价值。结果:MSCTA可清晰显示肠系膜上动脉解剖特征,VR及MIP图像均可显示血管主干及一级大分支,19例可显示二级分支,TSMIP可显示末端分支至肠壁周围血管网。MSCTA显示栓子的敏感度、特异度、准确度、阳性预测值、阴性预测值分别为100%、85.3%、94.5%、91.9%、100%。结论:MSCTA可以较为准确的显示猪肠系膜上动脉三维解剖学解剖特征及病变,有助于肠缺血等动物模型制作及介入实验研究。更多还原

【Abstract】 Objective:To evaluate the feasibility of superior mesenteric(SMA) angiography and localization of the embolism on porcine model by multi-slice computed tomographic(MSCT) angiography.Methods:24 porcine models were undergone contrast-enhanced MSCT scans of whole abdomen and DSA examinations.12 cases were undergone embolization of the second-grade SMA branches.CT angiograms of SMA were reconstructed with volume rendering(VR),maximum intensity projection(MIP),thin-slab maximum intensity projection(TSMIP).Various reconstruction techniques were compared and the ability of MSCTA in identifying embolism was evaluated.Results:MSCTA clearly displayed the anatomical features of SMA.Both of VR and MIP images could display the trunks and the first-grade branches of SMA,of which 19 cases could display the second-grade branches.TSMIP could diplay the terminal branches,even the capillary network of the intestinal wall.MSCTA is reliable in detecting embolism of SMA,and the sensitivity,specificity,accuracy,positive predictive value,negative predictive value were 100%、85.3%、94.5%、91.9%、100%,respectively.Conclusion:MSCTA can clearly visualize the anatomical features and lesions of SMA in porcine model which would provide a useful tool for experimental models and interventional treatment.更多还原