螺旋CT三维重建在腕关节损伤诊断中的应用

Application of 3D Spiral CT for Diagnosis of Wrist Joint Trauma

目的:探讨螺旋CT三维重建成像方法及其在腕关节损伤诊断中的价值。方法:对36例腕关节进行CT容积扫描,层厚1～3mm,层距1～3mm。将所有原始图像进行低对比及高对比薄层重建,然后将重建图像分别导入CT3D工作站,利用后处理软件MPR、MIP及SSD分别对腕关节进行成像,由两位CT诊断医生一起对各种后处理图像进行观察和分析。结果:全组病例的薄层重建及三维重建显示腕舟骨骨折35例,合并舟骨月骨周围脱位8例;三角骨骨折3例;大多角骨骨折1例。螺旋CT三维重建图像能全面、直观地显示相应的腕关节骨折、脱位及关节腔内骨片情况,尤其是MPR对骨折、脱位、骨碎片显示率为100%。结论:螺旋CT薄层MPR是一种无创伤性显示腕关节形态的最佳方法,其相关CT表现可为临床诊断腕关节损伤、制定手术方案提供可靠依据。

Objective To investigate the imaging methods of Spiral CT in Wrist joint and the diagnostic value in the Wrist joint trauma. Methods There were 36 cases in group of Wrist joint injures. All cases were performed in volume scan with SCT, then performed in thin slice low and high contrast image reconstructions. After that, all the source images were input into CT 3D work station, Wrist joints were imaged by post process software such as Multiplanar reconstructions（MPR）, Maximum intensity projection（MIP）, and surface shade display（SSD）. All the pictures were observed and analyzed by two radiologists. Result All post process images that obtain from the SCT show 35 patients with wrist vessel bone fracture （Os navicular fractures） ,3 patients with Os trigonum fractures, 1 patient with Os trapezium fractures. SCT 3D-imaging can produce clear and comprehensive images of wrist joint fracture and dislocation or piece of fracture in the wrist joint. Rate of displaying wrist joint trauma with thin slice MPR is 100%. Conclusions ： The SCT thin slice MPR imaging was best noninvasive image method to show the shape of wrist joint. It is the high value in diagnosing of wrist joint trauma in clinical practice.