泌尿系疾病三维CT重建技术研究(英文)

The Technical Study of 3DCT Reconstruction in Urological System

目的 探讨泌尿系疾病患螺旋CT三维重建技术。方法 回顾分析了54例成功进行了泌尿系螺旋CT三维重建的病例,其中46例使用了造影剂,扫描及重建分别在PQ6000CT机和工作站上进行,逐一分析各病例的扫描参数.扫描时间.三维重建类型.方法.技巧。结果 扫描参数.造影剂量等随检查目的不同而有所不同,重建技巧通过训练可以掌握,SSD及VR技术能生动的显示肾的畸形.肿块和结石,最大密度投影法适合于CT尿路成像和肾动脉狭窄的显示。结论 设计合理的扫描计划.匹配合适的参数.选择最佳扫描延迟时间,是获得泌尿系高质量三维重建图象的前提条件,熟练地掌握三维重建方法和技巧也是不可缺少的成功要素。

Objective To inquire into the technique of three dimensional (3D) reconstruction in spiral CT for urological diseases. Methods Retrospectively reviewed 54 cases successively underwent 3D reconstruction, in which contrast CT was performed in 46 cases by power or manual peripheral injection and received 50-100ml contrast media each. The examinatoin was performed on PQ 6000 spiral scanner and 3D reconstruction were obtained from voxel Q workstation. The scan parameters, timing of enhancement, pattern of 3D reconstruction, methods and skills in reconstruction were reviewed and analysed on by one. Results the scan parameters, dosage, form, timing of enhancement CT varies with different purposes. To learn the skills of reconstruction by a process of trial and find shaded surface display(SSD) and volume rendering (VR) technique showing vividly malformation, mass and stone of kidney. VR was more soft and SSD revealed strong stereoscopic effects. Maximum intensity projection (MIP) was very useful in CT urography and stenosis of renal artery. Conclusions To set a sensible scanning plan, mate properly scanning parameter and determine optimal timing of scanning plan, mate properly scanning parameter and determine optimal timing of scanning are all the important prerequisites for high quality 3D reconstruction in urological diseases. To grasp skillfully method and skill of 3D reconstruction is also a indispensable factor.