Kinematics analysis in total hip arthroplasty using multi-modal image registration technique

To diagnose total hip arthroplasty (THA) patients, it is important to analyze in-vivo kinematics of the implanted hip joint. There are some conventional analysis methods for estimating the pose/position of the implanted hip joint using 2-D/3-D image registration technique for 3-D multidetector raw CT (MDCT) images and 2-D X-ray radiograph images. One of the remained problems is that estimation results depend on the initial pose/position given manually. This paper proposes a fully automated method for estimating pose/position of the implants and the hip joint without giving initial pose/position. The proposed method releases us from manual interactions of giving initial pose/position by intervening between 3-D MDCT images and 2-D X-ray radiograph images with 3-D computer-aided design (CAD) model.