磁共振尿路成像对泌尿系疾病的诊断价值

Value of MR urography in the diagnosis of urologic disease

目的 :探讨磁共振尿路成像 (MRU)的临床应用及其对泌尿系疾病的诊断价值。方法 :泌尿系疾病 60例 ,其中输尿管畸形 14例 ,尿路结石 18例 ,尿路肿瘤 10例 ,炎症及结核 8例 ,外压性及手术后输尿管狭窄 4例 ,神经性膀胱及膀胱憩室 6例 .所有病例均行MRI检查及应用重T2 WI快速自旋回波序列行MRU检查 ,所有图像均作最大信号投影 (MIP)后处理重建。结果 :48例MRU显示尿道梗阻 ,MRU均能明确显示梗阻部位及程度 ,对静脉尿路造影 (IVU)不能显影者有优越性 ,定位诊断正确率 10 0 %,结合常规MRI定性诊断率达到 80 %。结论 :MRU是一种简便、无创伤检查技术 。

Objective:To investigate clinical application of MR urography in the diagnosis of urologic disease. Methods: Sixty patients with urologic diseases were studied,14 had urinary tract malformation,18 urinary tract calculus,10 urinary tract tumor,8 inflammatory diseases and 10 others.MRI and MRU were performed in all patients.MRU was performed with heavy T 2 weighted fast spin echo pulse sequence. Postprocedure processing was performed with a maximum intersity projection (MIP) algorithm.Results:58 cases showed urinary tract obstruction on MRU,which demonstrated clearly the site and severity of the obstruction,especially in those cases not revealed by IVU. MRU can demonstrate the level of urinary obstruction in 100% of the cases,and evaluate correctly the nature of the disease in 80% of the cases if combined with ordinary MRI.Conclusion:MR urography is a facile and noninvasive technique without using contrast material. This technique is useful in diagnosis of many urologic diseases and especially useful in diagnosis of urinary tract obstruction.