摘要目的探讨磁共振尿路造影（MRU）诊断上尿路梗阻性疾病的意义。方法 59例上尿路梗阻性疾病患者接受检查，MRU为冠状位快速自旋回波T2加权像。结果所有病例MRU尿路梗阻部位及扩张状况均显示良好，其中54例经手术或病理确诊，仅2例术前MRU误诊。结论 MRU作为一种非侵袭性、无辐射损伤和不需造影剂的新技术，对上尿路梗阻性疾病的定位及定性诊断具有特殊价值，是一种可供选择的有临床实用价值的尿路成像方法。

abstractsObjective　To evaluate the diagnostic efficacy of MR urography (MRU) in patients with upper urinary tract obstruction.　Methods　59 patients with upper urinary tract obstruction were subjected to MRU performed in a heavily T2 weighted fast echo pulse sequence in the coronal plane.　Results　The site of urinary tract obstruction and hydronephrosis were distinctly shown in all the 59 patients by MRU. 54 of them were confirmed by pathological or operative findings. Two patients were misdiagnosed by MRU before operation.　Conclusions　MRU is noninvasive and is free from ionizing radiation or iodinated contrast medium. As a new alternative technique, it is recommended for detecting the location pathogenesis of upper urinary tract obstruction.