正常直肠系膜和直肠筋膜的MRI表现  

MRI findings of normal mesorectal fascia and mesorectum

作　　者：王雅琴[1] 陈华成[2] 李进[3] 朱宏[4] 鞠学红[3] 杨春波[4] 董鹏[4] 

机构地区：[1]潍坊医学院医学影像学系,山东潍坊261042 [2]山东省潍坊市中医院影像科,山东潍坊261041 [3]潍坊医学院解剖学教研室,山东潍坊261042 [4]潍坊医学院附属医院影像中心,山东潍坊261031

出　　处：《中国中西医结合影像学杂志》2015年第2期129-131,共3页Chinese Imaging Journal of Integrated Traditional and Western Medicine

基　　金：山东省医药卫生科技发展计划项目(2011HZ112);山东省科学技术发展计划项目(政策引导类)(2012YD18106);山东省高等学校科技计划项目(J10LF15)

摘　　要：目的 :探讨直肠系膜、直肠筋膜的正常MRI表现。方法 :收集无直肠及周围间隙病变的50例患者的临床和MRI资料,在轴位图像上测量并记录:1精囊腺/子宫体平面上,直肠在直肠周围间隙内的解剖位置;2直肠筋膜显示情况及其厚度;3直肠系膜与盆壁脂肪信号强度比值;4直肠系膜内淋巴结显示情况。结果:精囊腺/子宫体平面上,直肠主要位于直肠筋膜构成的直肠周围间隙内的侧方。直肠筋膜最厚处为(1.94±0.54)mm。直肠系膜与盆壁脂肪信号强度比值为1.02±0.17;直肠系膜脂肪信号强度高于盆壁脂肪信号强度(P<0.01)。直肠系膜内正常淋巴结显示率低,其最大径均小于5 mm。结论:MRI能良好显示直肠筋膜及直肠系膜的解剖结构。Objective：To study the MRI features of the normal mesorectal fascia and mesorectum. Methods：The MR images of50 cases with normal mesorectal fascia and mesorectum were retrospectively analyzed. All the cases underwent MRI examination. Emphasis was placed on the following findings：1displaying of the rectum＇s location within the perirectal space;2displaying of mesorectal fascia and its thickness;3the signal intensity ratio of the fat within the mesorectum and the subcutaneous tissue; 4 displaying of the lymph nodes in the mesorectum. Results：The rectum located in the lateral site of the perirectal space. The MRI could show the mesorectal fascia and mesorectum,and the maximum thickness of the mesorectal fascia was1.94 ±0.54 mm. The signal intensity ratio of the fat in the mesorectum and the subcutaneous tissue was 1.02 ±0.17,and the signal intensity of the fat in the mesorectum was higher than that in the subcutaneous tissue（P〈 0.01）. The revealing rate of the lymph nodes in the mesorectum was low,and largest diameter was less than 5 mm. Conclusion：The MRI can demonstrate the normal mesorectal fascia and mesorectum in detail.

关 键 词：直肠系膜 直肠筋膜 解剖 磁共振成像 

分 类 号：R445.2[医药卫生—影像医学与核医学] R322.45[医药卫生—诊断学]