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目的:探讨MRI在膀胱癌的术前诊断及分期的应用价值.材料与方法:搜集20例采用0.5T磁共振扫描仪检查,经手术病理证实的膀胱癌,分析其MRI表现.结果:根据肿瘤的MRI表现将其分为腔内型、浸润型和腔外型.术前MRI诊断与TNM分期符合率为80％(16/20),MRI较病理分期偏高.结论:T1加权像主要用于肿瘤的定性诊断,T2加权像主要用于肿瘤的术前分期;MRI与病理分期有较高的符合性.“,”Objective: To investigate the practical value of MRI in the peperahve hong and diagnosis of urinary bladder cancer. Materisls and Methods: MRI findings in 20 cases with surgically and pathologically-proved bladder cancer were analyzed. Results: Based on MRI findings, bladder cancer was diveded into three types: (1) intra-cavity type(n = 15); (2) infiltrating type (n = 3); and (3) extra-cavity type (n = 2).Agrement in Staging of preoperative MRI and pathalop was found in 80% (16/20), ed the edng with MRI was a little bit higher than that with pathology. Conclusion: T1WI is useful mainly in qualitative diguis, while T2WI in preoperative staging. MRI staging is well commpatible with pathological staging.