磁共振弥散加权成像技术在直肠癌诊断及分期中的应用  

The Application of DWI in the Diagnosis and Preoperative Staging of Rectal Cancer

作　　者：杨维柘 田方正[1] 董苏荣[1] YANG Wei-zhe;TIAN Fang-zheng;DONG Su-rong(Taizhou People's Hospital,Taizhou Jiangsu 225300,China)

机构地区：[1]泰州市人民医院,江苏泰州225300

出　　处：《泰州职业技术学院学报》2018年第6期46-48,59,共4页Journal of Taizhou Polytechnic College

摘　　要：目的探讨磁共振弥散加权序列(DWI)成像在直肠癌诊断及分期的价值,以指导直肠癌的个体化治疗。材料与方法采用1.5T用单次激发自旋回波-平面回波技术(SE-EPI),b值的选择为500、800、1000s/mm^2,判断直肠癌的分期及浸润情况,并将影像诊断结果与术后病理结果对照。结果在DWI序列上,肿瘤及淋巴结均表现为高信号,随着b值升高对肿瘤组织的显示越明显,而肿瘤与周围正常肠周脂肪、肌肉及水的对比更清晰。结论 DWI序列可以较准确地对直肠癌进行术前诊断,协助TN分期的判断,并能有效评估直肠壁周围的侵犯程度、环周切缘是否受侵和邻近器官的侵犯情况。Objective To evaluate the value of magnetic resonance imaging in the preoperative diagnosis and staging of rectal cancer with DWI, so as to guide the individual treatment for patient with rectal cancer.Methods With 1.5 T and 3.0 T MR, phased array body coil.DWI using SE-EPI sequence, the b value was selected as 500,800, 1000 s/mm^2 to determine the stage and infiltration of rectal cancer, and the imaging diagnosis results were compared with the postoperative pathological results.Results In the DWI sequence, both the tumor and lymph nodes showed high signal, and the tumor tissue showed more obvious with the increase of b value, while the contrast between the tumor and surrounding normal periintestinal fat, muscle and water was clearer MRI and pathological examinations. Conclusion DWI can accurately diagnose rectal cancer preoperatively, assist in the determination of TN staging, and effectively assess the extent of invasion around the rectal wall, invasion of circumferential incision edge, and invasion of adjacent organs.

关 键 词：磁共振成像 直肠癌 弥散加权成像 

分 类 号：R735.37[医药卫生—肿瘤] R445.2[医药卫生—临床医学]