磁共振扩散加权成像对直肠癌术前分期的价值

目的:探讨MR扩散加权成像在直肠癌诊断中的临床应用价值.方法:回顾性分析43例直肠癌患者的MRI资料,所有患者均行常规序列T1 WI、T2 WI及DWI检查,将MRI诊断结果与手术病理结果进行对照分析.结果:常规序列T1分期的诊断符合率为60.0％(3/5),T2、T3、T4分期分别为80.0％(12/15)、66.7％(12/18)和80.0％(4/5);常规序列联合DWI的T1分期诊断符合率为100％(5/5),T2、T3、T4分期分别为100.0％(15/15)、83.3％(15/18)和100.0％(5/5).常规序列及常规序列联合DWI的直肠癌T分期总诊断符合率分别为72.1％和93.0％.结论:MR扩散加权成像结合常规序列能够对直肠癌T分期做出较准确的诊断.

Evaluation of diffusion-weighted MRI in the preoperative staging of rectal cancer

Objective：To assess the clinical value of diffusion-weighted imaging in the T staging of rectal cancer.Methods：Data of MR sequence including conventional MRI and DWI of 43 patients with rectal cancer were reviewed retrospectively.The results of MRI were correlated with of pathology.Results：The accuracy of MRI T1 staging was 60.0%（3/5）,T2 80.0%（12/15）,T3 66.7%（12/18） and T4 80.0%（4/5）.The accuracy of DWI combined with MRI conventional sequences T1 staging was 100%（5/5）,T2 100.0%（15/15）,T3 83.3%（15/18） and T4 100.0%（5/5）.The total accurate rates for T staging in rectal carcinoma by MRI conventional sequences alone and that combined with DWI were 72.1% and 93.0%,respectively.Conclusion：Diffusion-weighted imaging combined with conventional MRI can be more accurate for the judgment of T-staging in rectal cancer.