3D RECONSTRUCTION PROCESS OF FEMUR USING 2D X-RAY IMAGES

Abstract

Personalized three-dimensional (3D) femoral geometry is a great aid in the surgical planning. X-ray image is still essential to diagnose and plan surgery in total hip replacement due to its lower cost and lower dose of radiation than computer tomography (CT). The purpose of the current study is to improve 3D reconstruction process using conventional X-ray images incorporating the anatomical parameters for building up the femoral model.

For 3D reconstruction, the personalized femoral appearance and parameters were firstly prepared from X-ray images and the referential CT model with anatomical parameters was modified as follows: the axial scaling, shearing transformation and radial scaling. In this study, the reconstruction algorithm was applied to X-ray images obtained from the 28 years old male.

The current study showed that this 3D reconstruction technique is clinically useful and feasible because this method was based on anatomical parameters and used for whole femur. This result can provide the basic model of individual femur for using finite element method of hip or knee joint, and designing the customized hip and knee implant. In addition, this result can be applied to the visualized 3D model with more effective parameters of individual femur in the surgery navigation system.