磁共振仿真输尿管膀胱镜成像技术研究

目的 探讨磁共振仿真内窥镜尿路成像方法和技术。方法 采用磁共振水成像（MRH）和／或磁共振静脉尿路造影（MR－IVU）作为影像源，应用导航软件对150例患者进行了磁共振仿真尿路镜观察，其中107例同时行了X线静脉尿路造影（X－IVU），33傲地了输尿管镜或膀胱镜检查。结果 单层块单激发FSE序列除外，几种MRH和MRIVU技术，均有效地采集了全尿路影像，并获得仿真内镜图像，无任何与检查相关的并发症，结论 磁共振仿真尿道镜的内腔和病变的内镜样显示，可由二维HT2－FSE或多薄层单激发FSE序列，和一次屏气下的二维或三维快速破坏梯度重聚FSPGR序列获取，是常规磁共振成像有效的补充方法。

Study on the Techniques of MR Virtual Endoscopy of Urinary Tracts

Objective To study the methods and techniques of MR virtual endoscopy of urinary tracts. Methods MR virtual endoscopy of urinary tracts was performed in 150 cases, using navigator software based on the source imaging data of MR hydrography (MRH) and/or MR intravenous urography (MR IVU). X ray intravenous urography (X IVU) was performed in first 107 cases and 33 cases were underwent simultaneously ureterorenoscopy and/or cystoscopy. Results Urography was successfully obtained with various techniques of MRH and MR IVU, and three dimensional (3D) virtual endoluminal views in various way were successfully reformed with the source data of MR IVU and MRH but thick single shot fast spin echo pulse sequence. There was no any complication after imaging examination. Conclusion MR virtual endoscopy which provides endoscope like display of urinary tracts and lesions, is obtained with 2D heavily T2 weighted or thin single shot fast spin echo sequences and single breath hold 2D/3D fast spoiled gradient echo refocus (FSPGR) sequences, and it's a useful supplementary method to conventional MR imaging and other post processing techniques.