Patient‐specific assessment of dysmorphism of the femoral head–neck junction: a statistical shape model approach. Issue 4 (8th January 2016)

• Record Type: Journal Article
• Authors: Khanduja, Vikas; Baelde, Nick; Dobbelaere, Andreas; Van Houcke, Jan; Li, Hao; Pattyn, Christophe; Audenaert, Emmanuel A.
• Is Part Of: International journal of medical robotics and computer assisted surgery. Volume 12:Issue 4(2016)
• Page Start: 765
• Page End: 772
• Publication Date: 2016-01-08
• Subjects: hip -- femoro–acetabular impingement -- surgical planning -- image analysis -- computed tomography; Robotics in medicine -- Periodicals; Surgery -- Technological innovations -- Periodicals; Imaging systems in medicine -- Periodicals; 617.90285
• DOI: 10.1002/rcs.1726
• Languages: English
• ISSNs: 1478-5951

Abstract

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. Copyright © 2016 John Wiley & Sons, Ltd.