title: MRI-based assessment of hip joint translations.
abstract: To better understand movement limitations and, to some extent, the pathogenesis of osteoarthritis, it is important to quantitatively measure femoroacetabular translations to assess if any joint subluxation occurs. In this paper, we aim at measuring hip joint displacements from magnetic resonance images (MRI) based on a surface registration technique. Because this measurement is related to the location of the hip joint center (HJC), we investigate and compare different HJC estimation approaches based on patient-specific 3D bone models. We estimate the HJC based on a simulated circumduction while minimizing inter-articular distance changes. Measurements of femoroacetabular translations during low amplitude abductions (80 samples) and extreme flexions (60 samples) in female professional dancers, which is a population potentially exposed to femoroacetabular impingements, do not show any significant subluxation.
authors.affiliation: MIRALab-University of Geneva, Battelle, 7 Route de Drize, Carouge, Switzerland. benjamin.gilles@miralab.unige.ch
authors.forename: Benjamin
authors.initials: B
authors.lastname: Gilles
authors.forename: Frank Kolo
authors.initials: FK
authors.lastname: Christophe
authors.forename: Nadia
authors.initials: N
authors.lastname: Magnenat-Thalmann
authors.forename: Christoph D
authors.initials: CD
authors.lastname: Becker
authors.forename: Sylvain R
authors.initials: SR
authors.lastname: Duc
authors.forename: Jacques
authors.initials: J
authors.lastname: Menetrey
authors.forename: Pierre
authors.initials: P
authors.lastname: Hoffmeyer
mesh_terms: D001696:Biomechanical Phenomena; D006621:Hip Joint / Q000033:anatomy & histology* / Q000502:physiology / Q000503:physiopathology; D006801:Humans; D021621:Imaging, Three-Dimensional; D008279:Magnetic Resonance Imaging; D008954:Models, Biological; D015207:Osteoarthritis, Hip / Q000503:physiopathology*; D016059:Range of Motion, Articular / Q000502:physiology*