3.0T磁共振在直肠癌术前评估中扫描序列的优选  

Prior selection of MR scanning sequence for preoperative assessment of rectal cancer at 3.0T sagital

作　　者：何鑫[1] 朱丽娜[1] 刘艳[1] 杨爱梅[1] 王慧丽[1] 

机构地区：[1]新疆医科大学附属肿瘤医院核磁室,新疆乌鲁木齐830011

出　　处：《实用放射学杂志》2014年第5期841-844,共4页Journal of Practical Radiology

摘　　要：目的：探讨3.0T 磁共振在直肠癌术前评估中扫描序列的最优选择。方法根据指定的扫描序列对已确诊的61例直肠癌患者进行术前 T、N 分期并测量肿瘤的纵向浸润范围,将 MRI 诊断结果与术后病理结果作对照。结果 T2 WI-TRA（T2 weighted image-transverse,T2 WI-TRA）联合 DWI（diffusion weighted image,DWI）序列、T2 WI-TRA 序列、T1 WI-TRA＋ DCE（T1 weighted-transverse and dynamic contrast-enhanced image,T1 WI-TRA＋DCE）序列在 T 分期准确率分别为90.16%、78.69%、83.61%。薄层T2 WI-COR（T2 weighted image-coronal,T2 WI-COR）联合 DWI 序列、薄层 T2 WI-COR 序列、T1 WI-TRA＋CE（T1 weighted contrast-enhanced image,T1 WI-CE）序列的 N 分期准确率分别为81.97%、73.78%、72.13%。T2 WI-SAG（T2 weighted image-sagittal, T2 WI-SAG）联合 DWI 序列测量肿瘤的纵向浸润范围与病理结果采用配对样本 t 检验分析,两者差异无统计学意义（P 〉0.05）。结论3.0T 磁共振在直肠癌术前 T 分期、N 分期及肿瘤纵向浸润范围评估中的最优扫描序列分别是：T2 WI-TRA 联合 DWI 序列、薄层 T2 WI-COR 联合 DWI 序列、T2 WI-SAG 序列联合 DWI 序列。Objective To probe the prior selection of MRI scanning sequence for preoperative assessment of rectal cancer at 3.0T. Methods 61 patients with rectal cancer underwent preoperative T,N staging,and the sagittal infiltrated range of the tumor was measured according to the MR imaging.MRI findings were compared with the postoperative pathological results.Results The accu-racy of T staging by T2 WI-TRA combined with DWI,T2 WI-TRA and T1 WI-TRA＋DCE was respectively 90.1 6%,78.69% and 83.61%.The accuracy of N staging by T2 WI-COR （thin layer）combined with DWI,T2 WI-COR （thin layer）and T1 WI-TRA＋CE was respectively 81.97%,73.78% and 72.13%.No statistical difference in sagittal infiltration range of tumor was found between T2 WI-SAG combined with DWI and pathological results （P 〉0.05）by using paired samples t test.Conclusion The prior scanning sequences to determine preoperative T,N staging and to assess the vertical infiltration range of rectal cancer include T2 WI-TRA combined with DWI,T2 WI-COR （thin layer）with DWI,and T2 WI-SAG with DWI.

关 键 词：直肠癌 术前分期 磁共振成像 扫描序列 

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