Vikas Khanduja1,2, Nick Baelde3, Andreas Dobbelaere1, Jan Van Houcke1, Hao Li4, Christophe Pattyn1, Emmanuel A Audenaert1. 1. Department of Orthopaedic Surgery and Traumatology, Ghent University Hospital, Belgium. 2. Department of Trauma and Orthopaedics, Addenbrooke's-Cambridge University Hospitals, UK. 3. Department of Radiology, Jan Palfijn Hospital, Ghent, Belgium. 4. Department of Computer Science, University of Southern California, Los Angeles, USA.
Abstract
BACKGROUND: Objective quantification of anatomical variations about the femur head-neck junction in pre-operative planning for surgical intervention in femoro-acetabular impingement is problematic, as no clear definition of average normal anatomy for a specific subject exists. METHODS: We have defined the normal-equivalent of a subject's anatomy by using a statistical shape model and geometric shape optimization for finding correspondences, while excluding the femoral head-neck junction during the fitting procedure. The presented technique was evaluated on a cohort of 20 patients. RESULTS: Difference in α-angle measurement between the actual morphology and the predicted normal-equivalent, averaged 1.3° (SD 1.7°) in the control group versus 8° (SD 7.3°) in the patient group (p < 0.05). CONCLUSIONS: Defining normal equivalent anatomy is effective in quantifying anatomical dysmorphism of the femoral head-neck junction and as such can improve presurgical analysis of patients diagnosed with femoro-acetabular impingement.
BACKGROUND: Objective quantification of anatomical variations about the femur head-neck junction in pre-operative planning for surgical intervention in femoro-acetabular impingement is problematic, as no clear definition of average normal anatomy for a specific subject exists. METHODS: We have defined the normal-equivalent of a subject's anatomy by using a statistical shape model and geometric shape optimization for finding correspondences, while excluding the femoral head-neck junction during the fitting procedure. The presented technique was evaluated on a cohort of 20 patients. RESULTS: Difference in α-angle measurement between the actual morphology and the predicted normal-equivalent, averaged 1.3° (SD 1.7°) in the control group versus 8° (SD 7.3°) in the patient group (p < 0.05). CONCLUSIONS: Defining normal equivalent anatomy is effective in quantifying anatomical dysmorphism of the femoral head-neck junction and as such can improve presurgical analysis of patients diagnosed with femoro-acetabular impingement.
Authors: Willemina A van Veldhuizen; Richte C L Schuurmann; Frank F A IJpma; Rogier H J Kropman; George A Antoniou; Jelmer M Wolterink; Jean-Paul P M de Vries Journal: J Clin Med Date: 2022-03-18 Impact factor: 4.241