Kocaoğlu Murat, Ilica Ahmet Turan, Bulakbaşi Nail, Ergin Atilla, Ustünsöz Bahri, Sanal Tuba, Tayfun Cem, Somuncu Ibrahim
Department of Radiology, Gülhane Military Academy of Medicine, Ankara, Turkey, Turkey.
Diagn Interv Radiol. 2005 Dec;11(4):225-32.
To determine the diagnostic value of magnetic resonance (MR) urography in children with urinary tract dilatation.
Twenty-five children between the ages of 4 months and 13 years (19 males and 6 females, mean age 6.5 years) were evaluated with T2 weighted and contrast-enhanced T1 weighted MR sequences. Results were compared with findings obtained with ultrasonography (n=25), intravenous urography (n=18), Tc99m- DTPA scintigraphy (n=16), and/or micturating cystouretrography (n=13).
MR urography provided a superior imaging of urinary system dilatation, the site and the etiology of obstruction, and both regular and complicated kidney duplication than did conventional imaging methods. MR urography that used T2 weighted sequences was able to demonstrate 29 of 32 (90.6%) abnormal renal collecting systems. Fourteen of 21 (66.7%) normal systems were revealed by heavily T2 weighted images. Forty-six of 51 (90.2%) renal collecting systems could be shown by T1 weighted sequences. With this sequence, however, five collecting systems (9.8%) could not be shown secondary to poor renal function and/or dilution of contrast agent within the dilated urinary tract.
In children, MR urography may replace conventional uroradiological methods.
确定磁共振尿路造影（MRU）对尿路扩张患儿的诊断价值。
对25例年龄在4个月至13岁之间的儿童（男19例，女6例，平均年龄6.5岁）采用T2加权和对比增强T1加权MR序列进行评估。将结果与超声检查（n = 25）、静脉尿路造影（n = 18）、Tc99m - DTPA肾动态显像（n = 16）和/或排尿性膀胱尿道造影（n = 13）的结果进行比较。
与传统成像方法相比，MRU对泌尿系统扩张、梗阻部位及病因以及正常和复杂的重复肾均能提供更优的成像。采用T2加权序列的MRU能够显示32个异常肾集合系统中的29个（90.6%）。重T2加权图像显示了21个正常系统中的14个（66.7%）。T1加权序列可显示51个肾集合系统中的46个（90.2%）。然而，由于肾功能差和/或扩张尿路内造影剂稀释，该序列无法显示5个集合系统（9.8%）。
在儿童中，MRU可能取代传统的尿路放射学检查方法。
