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Proceedings Paper

Three-dimensional kinematic estimation of mobile-bearing total knee arthroplasty from x-ray fluoroscopic images
Author(s): Takaharu Yamazaki; Kazuma Futai; Tetsuya Tomita; Yoshinobu Sato; Hideki Yoshikawa; Shinichi Tamura; Kazuomi Sugamoto
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Paper Abstract

To achieve 3D kinematic analysis of total knee arthroplasty (TKA), 2D/3D registration techniques, which use X-ray fluoroscopic images and computer-aided design (CAD) model of the knee implant, have attracted attention in recent years. These techniques could provide information regarding the movement of radiopaque femoral and tibial components but could not provide information of radiolucent polyethylene insert, because the insert silhouette on X-ray image did not appear clearly. Therefore, it was difficult to obtain 3D kinemaitcs of polyethylene insert, particularly mobile-bearing insert that move on the tibial component. This study presents a technique and the accuracy for 3D kinematic analysis of mobile-bearing insert in TKA using X-ray fluoroscopy, and finally performs clinical applications. For a 3D pose estimation technique of the mobile-bearing insert in TKA using X-ray fluoroscopy, tantalum beads and CAD model with its beads are utilized, and the 3D pose of the insert model is estimated using a feature-based 2D/3D registration technique. In order to validate the accuracy of the present technique, experiments including computer simulation test were performed. The results showed the pose estimation accuracy was sufficient for analyzing mobile-bearing TKA kinematics (the RMS error: about 1.0 mm, 1.0 degree). In the clinical applications, seven patients with mobile-bearing TKA in deep knee bending motion were studied and analyzed. Consequently, present technique enables us to better understand mobile-bearing TKA kinematics, and this type of evaluation was thought to be helpful for improving implant design and optimizing TKA surgical techniques.

Paper Details

Date Published: 14 March 2011
PDF: 7 pages
Proc. SPIE 7962, Medical Imaging 2011: Image Processing, 79624B (14 March 2011); doi: 10.1117/12.877815
Show Author Affiliations
Takaharu Yamazaki, Osaka Univ. Graduate School of Medicine (Japan)
Kazuma Futai, Osaka Univ. Graduate School of Medicine (Japan)
Tetsuya Tomita, Osaka Univ. Graduate School of Medicine (Japan)
Yoshinobu Sato, Osaka Univ. Graduate School of Medicine (Japan)
Hideki Yoshikawa, Osaka Univ. Graduate School of Medicine (Japan)
Shinichi Tamura, Osaka Univ. Graduate School of Medicine (Japan)
Kazuomi Sugamoto, Osaka Univ. Graduate School of Medicine (Japan)

Published in SPIE Proceedings Vol. 7962:
Medical Imaging 2011: Image Processing
Benoit M. Dawant; David R. Haynor, Editor(s)

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