磁共振泌尿造影对泌尿道扩张及梗阻的诊断价值

目的估价磁共振（ＭＲ）泌尿造影对泌尿道扩张及梗阻的诊断价值。方法用重Ｔ２加权快速自旋回波（ＦＳＥ）序列和脂肪抑制技术作ＭＲ泌尿造影２０１例,其中９２例泌尿道扩张所有图像均作最大信号强度投影（ＭＩＰ）处理。结果９２例泌尿道扩张者中,梗阻性泌尿道扩张８６例,非梗阻性泌尿道扩张６例。梗阻病变包括输尿管癌１４例,输尿管结石１９例,输尿管良性狭窄１３例,先天性输尿管狭窄／或伴有先天异常２３例,盆腔病变致梗阻７例,膀胱癌侵犯输尿管１０例。非梗阻病变６例中５例为神经性膀胱。９２例ＭＲ泌尿造影均清楚显示泌尿道高质量的影像,确定有无梗阻及梗阻水平,并显示梗阻端的形态和特征。结论ＭＲ泌尿造影是一种可靠的、非侵袭性的检查方法,对无功能肾更有诊断价值。

Diagnostic evaluation of magnetic resonance urography in urinary tract dilatation and obstruction

OBJECTIVE: To evaluate the diagnostic value of magnetic resonance urography (MRU). METHODS: Two hundred and one patients were examined, 92 patients with urinary tract dilatation using a modified, heavily T2-weighted fast spin-echo pulse sequence and fat-suppression pulse aid. Postprocedure processing was performed with a maximum-intensity-projection (MIP) algorithm. RESULTS: In the 92 patients with urinary tract dilatation, 86 had obstructive urinary tract dilatation 6 non-obstructive urinary tract dilatation. In the 86 patients, 14 had ureteral carcinoma, 19 calculus, and 13 benign stricture, 23 congenital ureteral stricture/or with anomalies, 7 ureteral obstructive caused by extrinsic pelvis disease, and 10 bladder carcinoma involved ureter. In the 6 patients, 5 had nervous bladder. MR urography provided the high-resolution image of the urinary tract and determined the presence of obstruction. CONCLUSION: MR urography is a reliable noninvasive method for depicting the urinary tract.