A New Method for Finding the Shoulder Complex Rotation Centre Using 3D Body Scanning. SG Rozevink, I Kingma, D Spies et al.

Date: October 2018.
Source: 9th 3DBODY.TECH Conference and Expo. October 16-17, 2018. Lugano, Switzerland, USA.
Presenter: SG Rozevink
Session: Technical Session 1: Medical Applications
Abstract: To avoid radiation exposure to the body, the rotation centre of the shoulder complex is often assessed using the Optotrak motion capture system instead of X-ray imaging. Recently, 3D body scanning techniques evolved from static to temporal scanning. This study investigated if a time series of 3D body scans may be an alternative for motion capture systems focussing on the shoulder complex rotation centre which is relevant for exoskeleton alignment to the user’s body. 13 Male participants participated in this study (age 24.8±2.4 years, stature 182.2±5.5 cm, body mass 80.7±7.3 kg). Motion capture data (Optotrak) and 3D body scans (3dMD) were collected while the participant performed predefined movements (abduction, anteflexion and a combination of the two). The helical axes method was used to calculate the rotation centre from motion capture data as reference. The 3D scans were processed modelling the upper arm as a cylinder or as a set of perpendicular slices to the centroid axis.

Presentation: A New Method for Finding the Shoulder Complex Rotation Centre Using 3D Body Scanning.
Authors: SG Rozevink [Vrije Universiteit Amsterdam], I Kingma, D Spies, MI Paalman, J Molenbroek, B Naagen, M Maas, G Streekstra, HAM Daanen. Industrial Design Engineering, Technical University Delft, The Netherlands.