MSCT在孤立性肠系膜上动脉夹层诊断中的临床应用

The Diagnosis of Isolated Superior Mesenteric Artery Dissection by Multi-slice CT

目的分析探讨多层螺旋CT(MSCT)在孤立性肠系膜上动脉夹层(SMAD)诊断中的意义。方法回顾性分析12例经MSCT证实的孤立性SMAD患者的影像资料,用容积显示(VR)、最大密度投影(MIP)、多平面重组(MPR)、曲面重组(CPR)技术进行肠系膜血管图像重建,分析总结SMAD的MSCT特征性表现。结果 MSCT的典型表现为:动脉期SMA月牙形充缺损影,真腔变细,伴有假性动脉瘤者,假腔可扩大挤压真腔,导致真腔呈线样改变。本组12例患者中,9例患者假腔在动脉期呈月牙形低密度影包绕真腔,3例患者伴有假性动脉瘤形成,假腔呈瘤样扩张压迫真腔。利用MSCT的后处理技术,可以从不同角度观察病变,可清楚显示病变累及的范围、程度等情况。结论 MSCT能够快速、无创、准确的诊断孤立性SMAD,可为孤立性SMAD的病情评估提供可靠信息,对指导孤立性SMAD的治疗具有重要意义。

To investigate the efficacy of multi-slice CT （MSCT） in diagnosis of isolated superior mesenteric artery dissection （SMAD）. Methods A retrospective analysis of 12 cases of SMAD patient＇s imaging data, to summarize the MSCT features of SMAD. Results All patients underwent MSCT. MSCT imaging characteristics.- the false lumen was ＂crescent＂ low density surrounding the true lumen, and the true lumen was compressed. If there a dissection aneurysm, the false lumen was dilation and the true lumen was severe compressed. Of the 12 patients, the false lumen was ＂crescent＂ low density surrounding the true lumen in 9cases, and 3 patients had dissection aneurysm. Use of the post-processing technology, the lesion involving the scope and degree of the disease can be observed from different angles. Conchusion MSCT is a fast, non-invasive method, and can diagnose isolated SMAD correctly. It can provide reliable information to assess the condition of isolated SMAD.