磁共振尿路成像结合MRI在泌尿系统肿瘤致尿路梗阻中的诊断价值

Diagnostic value of MR urography combined MRI to urinary tract obstruction caused by urinary carcinoma

目的评价低场强磁共振尿路成像(MRU)与常规磁共振成像(MRI)结合在泌尿系统肿瘤致尿路梗阻中的诊断价值。方法选择经手术病理证实的泌尿系统肿瘤致尿路梗阻性病变39例,男性24例,女性15例,年龄20～75岁。所有病例均使用Philips0.5T超导磁共振成像仪检查,全部病例行常规MRI和MRU。结果MRU检查39例显示梗阻部位39例,提示占位征象12例,梗阻端占位性病因诊断率为30.8%;显示多发病变5例;MRU结合常规MRI图像显示占位性病变26例,占位性梗阻的病因诊断率为66.7%。结论MRU可以直观地显示尿路梗阻的部位和尿路扩张的程度及多发病变,而常规MRI图像则能清楚地显示梗阻端的内部结构和外周关系。因此,常规MRI与MRU结合可以提高低场强磁共振对泌尿系统肿瘤致尿路梗阻诊断的符合率。

Objective To evaluate the diagnostic value of low-field MRI and MRU to urinary tract obstruction causcd by urinary carcinoma.Me＇otis Thirty-nine cases of urinary carcinoma with pathologic confirmation were investigated. There were 24 males and 15 females with an average age of 40.5 years.All patients were studied using a 0.5 T MR scanner, and all the cases were performed axial or coronal MR imaging and MRU.Results In MRU images, 39 cases displayed obstruction, 12 of them suggested mass lesion,therefore,the detection rate of the space occupying lesion was 30.8%, 5 cases displayed multiple lesion.Combined with MRI, 26 cases suggested mass lesion,therefore, the detection rate of the space occupying lesion was 66.7%.Conclusion MRU can directly reveal the location of the obstruction and muhiple lesion,also can delineate the presence and the degree of hydronephrosis of the urinary system, Moreover regular MRI images can delineate the lesion and the relationship of the lesion to the neighbour structures.So MRU combined MRI may be a good alternatives to dignose the urinary tract obstruction caused by urinary carcinoma.