节点文献
3.0T磁共振及功能成像在直肠癌的应用:术前诊断,分期及其与肿瘤微结构的关系
Rectal Cancer at 3.0T MRI and FMRI: Preoperative Diagnosis, Staging and Correlation with Tumor Microstructure
【作者】 张晓明;
【导师】 李传福;
【作者基本信息】 山东大学 , 影像医学与核医学, 2006, 博士
【摘要】 目的: 探讨3.0T磁共振及其功能成像在直肠癌术前诊断、分期和手术方式预测中的价值及功能磁共振成像与肿瘤微结构的关系。 材料与方法: 1、一般资料:使用3.0T双梯度短磁体全身磁共振系统(GE Signa EXCITE Ⅱ,Milwankee,Wisconsin,U.S.A.),8通道相控阵表面线圈,对60例直肠癌及直肠周围病变患者分别进行常规磁共振检查及功能磁共振检查。其中,原发性直肠癌38例,直肠腺瘤2例,间质瘤2例,直肠子宫内膜异位症1例,皮样囊肿1例,直肠癌术后9例(复发6例,无复发3例),肛周脓肿及肛瘘7例。检查前行肠道准备,盐酸山莨菪碱10mg肌注,温生理盐水灌肛。 2、常规扫描:分别进行冠状T2WI(FRFSE-XL序列)、冠状T2FS(FRFSE-XL序列)、矢状T2WI(FRFSE-XL序列)、矢状T2FS(FRFSE-XL序列)、轴位T2WI(FRFSE-XL序列)、轴位T2FS(FRFSE-XL序列)、轴位T1WI(FSE-XL序列)、轴位T1WI(F-SPGR序列)、轴位T1FS(F-SPGR序列)、2DMR水成像(SSFSE序列)和动态增强(3D F-SPGR序列)扫描,比较不同序列的图像质量、伪影多少及肠壁/病变显示情况。根据MRI所示征象对直肠癌患者进行术前分期,测量肿瘤下缘距肛提肌直肠附着处的距离,将MRI的诊断和分期结果、对手术方式的预测与手术病理结果相对照,计算其诊断的准确性、敏感性、特异性、阳
【Abstract】 ObjectivesTo evaluate the value of both MRI and fMRI at 3.0T in preoperative diagnosing, staging and surgical planning of rectal cancer, and to analyze the correlation of fMRI with microstructure of rectal disease.Materials and Methods1. Both MRI and fMRI were separately obtained in sixty patients with rectal diseases (38 rectal cancers, 6 local recurrence, 3 no local recurrence, 2 adenomas , 2 stromal tumors, 1 dermoid cyst, 1 endometriosis, 7 periannual abscesses and anal fistulas) by using 3.0T MR scanner (GE Signa Excite II, Milwankee, Wisconsin, U.S.A.) with a 8-channel phased-array surface coil. Bowel preparation, hypotonic study and warm sodium chloride enema were manipulated before the examination.2. Routine MRI scanning: The image quality, artifact and demonstration of rectal tumors and the wall of the rectum of 11 different sequences, including coronal T2WI(FRFSE-XL), coronal T2FS(FRFSE-XL), sagital T2WI(FRFSE-XL), sagital T2FS(FRFSE-XL), axial T2WI(FRFSE-XL), axial T2FS(FRFSE-XL), axial T1WI(FSE-XL), axial T1WI(F-SPGR), axial T1FS(F-SPGR), 2D MR hydrography(SSFSE)and contrast enhancement(3D F-SPGR), were compared. The diagnosis and staging were made according to MRI findings and were correlated with the pathologic findings. The distance from the lower margin of rectal cancer to the point where levator ani muscle attached to rectum was measured in order to
【Key words】 rectal cancer; magnetic resonance imaging; dynamic contrast enhancement; diffusion-weighted imaging; immuno-histochemistry;