双源CT不同后处理技术诊断肠系膜上动脉狭窄的对比观察

Comparison of different post-processes of dual-source CT in diagnosis of superior mesenteric artery stenosis

目的探讨双源CT不同后处理技术在肠系膜上动脉(SMA)狭窄诊断中的价值。方法对12例经数字减影血管造影(DSA)及手术证实SMA狭窄患者的双源CT血管造影(CTA)图像进行分析,采用多平面重组(MPR)、最大密度投影(MIP)、容积再现(VR)后处理技术对SMA进行显示。以手术及DSA为参考标准,统计双源CT不同后处理技术诊断SMA狭窄的敏感度、特异度。结果双源CT各种后处理技术中,MPR、MIP、VR敏感度分别为75.00%、62.50%、43.75%,特异度分别为98.00%、92.22%、89.29%。MIP与MPR诊断SMA狭窄的敏感度差异无统计学意义(P>0.05),VR与MPR诊断SMA狭窄的敏感度差异有统计学意义(P<0.05)。结论双源CT各种后处理技术在诊断SMA狭窄各有优势,结合各种技术有助于准确诊断病变。

Objective To observe the value of the post-processes of dual-source CT in the diagnosis of superior mesenteric artery（SMA） stenosis.Methods Twelve patients with SMA stenosis confirmed with digital subtraction angiography（DSA） and operation were enrolled.CT angiograms were reconstructed with multiplanar reconstruction（MPR）,maximum intensity projection（MIP） and volume rendering（VR）.With the Results of DSA and operation as golden standard,the sensitivity and the specificity of different CT post-processes in the diagnosis of SMA stenosis were compared.Results The MPR,MIP and VR had sensitivity of 75.00%,62.50% and 43.75%,specificity of 98.00%,92.22% and 89.29%,respectively.There was no statistical difference between MPR and MIP in diagnosing SMA stenosis（P0.05）,but statistical difference was found between MPR and VR（P0.05）.Conclusion Each post-processing technology has its own advantage.Integration of them helps to accurate diagnosis of SMA stenosis.