Comparative study of MSCT and DSA for demonstration of superior mesenteric artery in porcine model

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.