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Fusion of radio stereometric analysis data into computed tomography space: Application to the elbow joint
Karolinska Institute, Department of Molecular Medicine and Surgery, Section of Orthopaedics and Sports Medicine.
Karolinska Institut, Department of Clinical Science, Intervention and Technology, Section of Orthopaedics.
Karolinska Institute, Department of Molecular Medicine and Surgery.
New York University, Department of Radiology. (Nuclear Medicine)
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2007 (English)In: Journal of Biomechanics, ISSN 0021-9290, E-ISSN 1873-2380, Vol. 40, no 2, 296-304 p.Article in journal (Refereed) Published
Abstract [en]

Improvement of joint prostheses is dependent upon information concerning the biomechanical properties of the joint. Radiostereometric analysis (RSA) and electromagnetic techniques have been applied in previous cadaver and in vivo studies on the elbow joint to provide valuable information concerning joint motion axes. However, such information is limited to mathematically calculated positions of the axes according to an orthogonal coordinate system and is difficult to relate to individual skeletal anatomy. The aim of this study was to evaluate the in vivo application of a new fusion method to provide three-dimensional (31)) visualization of flexion axes according to bony landmarks. In vivo RSA data of the elbow joint's flexion axes was combined with data obtained by 3D computed tomography (CT). Results were obtained from five healthy subjects after one was excluded due to an instable RSA marker. The median error between imported and transformed RSA marker coordinates and those obtained in the CT volume was 0.22mm. Median maximal rotation error after transformation of the rigid RSA body to the CT volume was 0.003 degrees. Points of interception with a plane calculated in the RSA orthogonal coordinate system were imported into the CT volume, facilitating the 3D visualization of the flexion axes. This study demonstrates a successful fusion of RSA and CT data, without significant loss of RSA accuracy. The method could be used for relating individual motion axes to a 3D representation of relevant joint anatomy, thus providing important information for clinical applications such as the development of joint prostheses.

Place, publisher, year, edition, pages
Oxford, UK: Elsevier Science Ltd , 2007. Vol. 40, no 2, 296-304 p.
Keyword [en]
radiostereometric analysis, computed tomography, joint visualization, elbow, flexion axes, 3D-presentation, total hip-arthroplasty, acetabular component migration, semiautomated program, collateral ligament, flexion axis, ct, orientation, kinematics, position, mri
National Category
Radiology, Nuclear Medicine and Medical Imaging Orthopedics
Research subject
URN: urn:nbn:se:kth:diva-16354DOI: 10.1016/j.jbiomech.2006.01.019ISI: 000243868700008ScopusID: 2-s2.0-33845667003OAI: diva2:334396

QC 20150630

Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2015-06-30Bibliographically approved

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Maguire Jr., Gerald Q.
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