目的 探讨MRI联合弥散加权成像 对腹膜转移癌患者的临床诊断价值。方法 选择2014年2月至2015年3月在我院进行治 疗的疑似腹膜转移癌患者56例，所有入选 患者均行MRI常规扫描联合弥散加权成像 扫描。结果 在入选的56例疑似腹膜转移 癌患者中经病理检查及随访，有43例确诊 为腹膜转移癌。MRI及MRI联合DWI的ROC曲 线下面积分别为0.681和0.817，差异有统 计学意义(P<0.05)。MRI对腹膜转移癌的 灵敏度、特异性、阳性及阴性预测值分别 为85.7%，53.8%，85.7%和53.8%；MRI联 合DWI对腹膜转移癌的灵敏度、特异性、 阳性及阴性预测值分别为92.9%，71.4%， 90.7%和76.9%。结论 MRI联合弥散加权成 像诊断腹膜转移癌相对于单独利用MRI具 有更高的临床价值，可在临床推广应用。

Objective To investigate the clinical diagnostic value of MRI combined with diffusion weighted imaging in patients with peritoneal metastasis. Methods A total of 56 cases of patients with peritoneal metastasis from February 2014 to March 2015 in our hospital were selected. All patients were diagnosed with MRI and MRI combined with diffusion weighted imaging. Results All the 56 suspected cases of peritoneal metastasis were examined by pathological examination and follow-up, 43 cases were confirmed diagnosed as peritoneal metastasis. The area under the DWI curve of MRI, MRI and ROC was 0.681 and 0.817, respectively, the difference was significant (P<0.05). The sensitivity, specificity, positive and negative predictive value of MRI for diagnosis of peritoneal metastasis were 85.7%, 53.8%, 85.7% and 53.8%, respectively. The sensitivity, specificity, positive and negative predictive value of MRI combined with DWI for peritoneal metastasis were 92.9%, 76.9%, 90.7% and 71.4% respectively. Conclusion MRI combined with diffusion weighted imaging has a higher clinical value than that of MRI alone in the diagnosis of peritoneal metastasis, which can be used in clinical application.