磁共振尿路成像诊断儿童先天性肾发育不良

目的 探讨磁共振尿路成像(MR urography,MRU)在诊断儿童先天性肾脏发育不良中的应用价值. 方法 对患有先天性肾发育不良并患肾无功能的13例患儿采用常规MRI平扫及MRU(重T_2加权半傅立叶采集单次激发快速自旋回波序列)检查. 结果 13例病例中,常规MRI检查有1例发育不良并异位于盆腔内的小肾未被检出;在MRU原始图像上有1例位于脊柱旁肾窝下方的发育不良的小肾未被发现;MRU MIP重建图像可清晰显示出多房性囊性发育不良的肾脏,对单纯性肾盂呈杵状改变的肾脏显示不佳.全部病例及其伴发病变均被常规MRI结合MRU原始图像、MRU MIP重建图像正确诊断.结论常规MRI结合MRU对诊断儿童先天性肾发育不良有重要价值.

Magnetic Resonance Urography in Diagnosing Congenital Renal Dysplasia in Children

Objective To approach the value of MR urography (MRU) in diagnosis of congenital renal dysplasia in children.Methods 13 children with congenital renal dysplasia and renal inadequacy were examined by routine MRI and MRU with heavy T_2 weighted single stimulation fast spin echo sequences.Results The congenital atopic dysplastic rens located at pelvis in one case and at below nephritic pit in one case were not detected by MR imaging and original MRU images,respectively.Multicystic dysplastic kidney could be well showed by MRU MIP images, but the cases with clubbed renal pelvis were not well demonstrated by MRU. All cases and the complications were correctly diagnosed by routine MRI, original MRU and MRU MIP images.Conclusion MR urography in combination with routine MRI is of important value in diagnosing congenital renal dysplasia in children.