摘要
目的探讨正常成人直肠系膜螺旋CT扫描的形态学特征。方法对50例正常成人（男女各25例）进行盆腔横断面螺旋CT扫描，观察其形态学特征，测量不同平面厚度，分析直肠系膜厚度与体质量指数及骨盆大小的关系。结果直肠系膜在螺旋CT上显示清晰，上中部直肠系膜形态相似，下部后外侧明显变薄。直肠系膜前方厚度为（2．3±1．2）mm，侧方厚度为（13．5±4．0）mm，后方厚度为（7．3±3．5）mm，三者之间比较差异有显著性（F=260．09，q=4．969～11．156，P〈0．01）。上、中平面直肠系膜厚度均比下平面系膜厚（F=177．243，q=4．352、4．311，P〈0．01）。男性下平面侧方和后方直肠系膜厚度比女性薄（t=2．095、2．979，P〈0．05）。直肠系膜侧方、后方厚度与体质量指数存在线性正相关（r=0．940、0．864，P〈0．01），与骨盆大小（中骨盆横径、前后径）亦存在线性正相关（r=0．766、0．655，P〈0．01）。结论直肠系膜具有特有的螺旋CT形态特征，可为直肠癌的CT术前影像学分期提供依据。
Objective To study the morphology of adult mesorectum with spiral CT scanning. Methods A cross-section scanning of pelvic cavity was done for 25 men and 25 women, the morphology was observed and the thickness of different planes measured. The relation between the thickness of the mesorectum, the body mass index （BMI） and the pelvis size was ana- lyzed. Results The mcsorectum was well displayed on spiral CT. The shape of the upper part of the mesorectum was similar to that of the middle part, but the lower lateral-posterior part was thinner. The thicknesses of the anterior part of the mesorectum was （2.3±1.2） ram, the posterior part was （7.3±3.5） ram, and the lateral part was （13.5±4.0） ram, the difference between them was significant （F 260.09,q 4. 969- 11. 156,P〈0.01）. The thickness of mesorectum at the lower plane was significantly thinner than those at the upper and middle planes （F=177.243;q=4.352,4.311,P〈0.01）. It was thinner in man than that in woman on lateral and posterior part on the lower plane （t= 2. 095,2. 979,P〈0.01 ）. A positive linear correlation was noticed among the thickness of the lateral and posterior mesorectum with BMI （r=0. 940,0. 864;P〈0.01） and the pelvis size （r=0. 766, 0. 655;P〈0.01） Conclusion The mesoreetum is characteristically displayed on spiral CT, which could provide information for image staging of rectal carcinoma before operation.
出处
《青岛大学医学院学报》
CAS
2010年第1期55-57,共3页
Acta Academiae Medicinae Qingdao Universitatis
