正常乙状结肠系膜的 MSCT 表现  

MSCT manifestations of normal sigmoid mesocolon

作　　者：管玥[1] 陈华成[2] 朱宏[3] 杨春波[1] 孙顺吉[1] 董鹏[1] 

机构地区：[1]潍坊医学院附属医院影像中心,山东潍坊261031 [2]潍坊市中医院影像中心 [3]潍坊医学院外语系

出　　处：《实用放射学杂志》2014年第8期1313-1315,1340,共4页Journal of Practical Radiology

基　　金：山东省科学技术发展计划项目（政策引导类）（2012YI）18106）;山东省自然科学基金（ZR2013HQ020）;山东省医药卫生科技发展计划项目（2011HZ112）;山东省高等学校科技计划项目（J10LF15）.

摘　　要：目的：探讨正常乙状结肠系膜（SMc）的多层螺旋 CT（MSCT）表现。方法回顾性分析无 SMc 病变的43例成人的增强CT 资料。着重观察肠系膜下动脉、乙状结肠动脉、乙状结肠边缘动脉及其直小动脉的显示情况,SMc 在盆腔内的分布情况,SMc 淋巴结和脂肪的显示情况。结果（1）薄层最大密度投影（MIP-thin）和容积再现（VR）图像均可清晰显示肠系膜下动脉和乙状结肠动脉主干,VR 图像对乙状结肠边缘动脉及其直小动脉显示欠佳,MIP-thin 图像对乙状结肠边缘动脉及直小动脉显示率为93.0%；（2）SMc 脂肪组织密度均匀,高于邻近皮下脂肪密度（P 〈0.05）；（3）SMc 淋巴结显示率为30.2%（13/43）。结论 MSCT 可以清晰显示正常 SMc 的解剖结构。Objective To study the CT features of the normal sigmoid mesocolon by using multi-slice spiral computed tomo-graphy （MSCT）.Methods The CT images of 43 patients with normal sigmoid mesocolon were retrospectively analyzed.All the cases underwent contrast-enhanced CT scanning.Emphasis was placed on the following findings：displaying of inferior mesenteric artery （IMA）;sigmoid mesoncolonic artery,marginal artery and its vasa recta;location of the sigmoid mesocolon in the pelvic cavity;the CT findings of the sigmoid mesocolonic fat and lymph nodes.Results （1）The IMA and the sigmoid mesoncolonic artery can be shown clearly on the volume-rendered （VR）and thin-slab maximum-intensity projection （MIP-thin）CT images.40 cases （93.0%） can be detected the marginal artery and its vasa recta on the MIP-thin images,but it is difficult to be detected on the VR images.（2） The density of the sigmoid mesocolonic fat was homogeneous and higher than that of subcutaneous fat （P 〈0.05）.（3）The revealing rate of the lymph nodes in the sigmoid mesocolon was 30.2% （13/43）.Conclusion The MSCT can demonstrate the normal sigmoid mesocolon in detail.

关 键 词：肠系膜 乙状结肠 解剖 计算机体层成像 

分 类 号：R322.45[医药卫生—人体解剖和组织胚胎学] R814.42[医药卫生—基础医学]