Clinical application of three-dimensional CT in congenital dislocation of hip

Objective Aim to evaluate the clinical application and importance of the reconstruction of three-dimensional (3D) CT on congenital dislocation of hip joint (CDH). Methods There were 22 patients with the diagnosis of CDH in this project , including 15 bilateral involvements and 7 unilateral involvements as well as two normal hips. In total, there were 37 dislocated hips and 11 hips for control. The patients were examined with spiral CT (PQ 6000, Picker Co. ). The 3D pictures were taken and the relevant measurements were made in terms of SSD, MIP and MPR on an independent computer workstation. Result The 3D reconstruction techniques were successfully used to show femoral head, acetabulum and the relationship between acetabulum and femoral head respectively. The technique of MPR was used to measure the acetabular index (AI) and femoral neck anteversion (FNA). Conclusion The 3D CT of hip joint provides more information of the imaging and is a very useful technique for the diagnosis and planning the operation of CDH.