速尿在低场磁共振尿路成像中的应用探讨

目的探讨速尿在低场磁共振尿路成像(MRU)中的应用价值。方法对32例疑有尿路病变的被检查者均行常规MRU及扫描前静脉注射速尿20mgMRU检查,采用重T2WI快速自旋回波(FSE)序列,图像后处理以最大信号强度投射法(MIP)进行三维(3D)重建。结果未注射速尿前的32例常规MRU中,5例肾集合系统不显影,18例肾实质及集合系统显影效果差;而静脉注射速尿后的MRU提供了全部32例的肾实质和肾集合系统的高分辨图像,显影较前者更为清晰,定位诊断准确。结论在MRU中,扫描前静脉注射速尿能更清晰地显示肾实质和肾集合系统解剖结构和病变情况,因此可把扫描前静脉注射速尿作为低场MRU检查的一种常规方法。

The Application of Furosemide in MRU with Low Field Magnet

Objective To evaluate the value of furosemide in magnetic resonance urography(MRU) with low field magnet.Methods The routine MRU and MRU after administration of intravein of furosemide were performed with heavily T_2 weighted fast spin echo pulse sequence in 32 cases with urethral diseases.Then three-dimensional(3D) reconstruction for post procedure processing with a maximum-intensity projection(MIP)algorithm was done.Results On routine MRU,there were no image of collecting systems of kidney in 5 cases,and poor images of parenchyma and collecting systems of kidney in 18 cases after using furosemide before MRU,MRU provided high resolution images of parenchyma and collecting systems of kidney in all cases,and images were much clear,the localized diagnosis was accurate.Conclusion MRU using furosemide before scanning can display the parenchyma and collecting systems of kidney distinctively,so furosemide can be regarded as a routine method used before MRU with low field magnet.