三维计算机X线断层照像术测量股骨颈前倾角在发育性髋关节脱位治疗中的应用

Application of Three-Dimensional Computed Tomography for Detecting Femoral Neck Anteversion in Development Dislocation of Hip in Children

目的探讨三维CT测量股骨颈前倾角(FNA)在小儿发育性髋关节脱位(DDH)治疗中的应用价值。方法DDH患儿12例,其中双髋脱位4例,单髋脱位8例,均行闭合复位、蛙式石膏外固定术,采用GE公司Hip speed Fi/x双层螺旋CT进行表面遮盖成像、最大密度投影、多平面重建等三维观察和FNA测量,分别在术前对股骨头颈、髋臼及臼头关系行三维重建。结果髋脱侧FNA明显增大,与其同年龄段患儿正常髋关节侧比较差异有显著性(P<0.05)。结论三维CT可直观、全面及分解地显示髋关节结构,更加精确地测量FNA,从而达到对DDH患儿个体化治疗的目的。

Objective To evaluate the value of reconstruction of three- dimentional CT in development dislocation of hip（DDH）in children. Methods Twelve cases of DDH concluded 4 bilateral and 8 unilateral cases. To sum up, 16 sick hips were operated and 8 normal hips were also obtained by three- dimensional CT（Hip speed Fi/x, GE Co）. Results 3D reconstruation were used to show femoral head, aeetabulum and relationship of aeetabulum and femoral head respectively. The difference between FNA measurement of sick hips and those of normal hips were significant（P〈 0.05）. Conclusion Three- dimensional CT of hip inereases the information of imaging and affords the new technieal support to relat diagnosis and individual therapy of DDH.