低场强MR泌尿系水成像对尿路梗阻性疾病的诊断价值

Diagnostic Value of Low-field Magnetic Resonance Urography in Obstructive Diseases of Urinary Tract

目的:评价低场强磁共振泌尿系水成像(MRU)对尿路梗阻性疾病的诊断价值。方法:对60例尿路梗阻性疾病患者行MRU及常规MR检查,并与B超I、VU及CT检查结果进行比较。其中输尿管癌12例,输尿管结石19例,输尿管炎性狭窄9例,肾盂输尿管连接部梗阻4例,输尿管先天畸形6例,盆腔肿瘤外压性输尿管狭窄9例,神经源性膀胱1例。结果:MRU能清晰显示尿路梗阻部位,定位诊断符合率100%,结合常规MR定性诊断符合率86.7%,优于B超、IVU及CT检查。结论:MRU结合常规MR对尿路梗阻性疾病具有较高的诊断价值,对儿童、老年人、妊娠妇女及IVU禁忌者可作为首选方法。

Objective：To evaluate the diagnostic value of low-field magnetic resonance urography （MRU） in obstructive diseases of urinary tract. Methods=Sixty cases with obstructive diseases in urinary tract were examined with MRU and conventional MR,including 12 cases with uretal tumors, 19 cases with uretal calculus,9 cases with inflammatory stricture of urinary tract,4 cases with strictures of ureteropelvic junction, 6 cases with uretal malformation,9 cases with uretal obstruction caused by the pressure of pelvic tumors and 1 case with neuropathic bladder. The results were compared with those obtained by using ultrasonography （US）, intravenous urography （IVU） and computed tomography （CT）. Results： MRU could clearly show the obstructive locations in the urinary tract. The accuracy of the location diagnosis was 100%. If combined with conventional MRI,the diagnostic rating of the obstructive etiology was 86.7%. MRU was superior to US,IVU and CT. Conclusion：MRU has higher value in the diagnosis of obstructive diseases of urinary tract. It should become the first choice for those patients who cannot bear intravenous pyelography,such as children,elderly people and pregnant women.