Establishment of Scapular Dyskinesis Detection Method Using a Depth Sensor

Abstract

Quantification of scapular motion in patients with shoulder disorders is important, but there are no existing tools that allow simple quantification in clinical setting. Recently, depth sensors have attracted much attention in terms of accuracy and price. Therefore, this study was conducted to investigate the reliability of scapula angle measurement using depth sensors as a preliminary study to quantify scapula motion using depth sensors. The angles of superior and inferior rotation, internal and external rotation, and anterior and posterior tilt between two trials were calculated from point cloud using depth sensor data, and the intraclass correlation coefficients and the standard error(SEM) were examined in healthy adult male subjects. The results showed that the correlation coefficients were good for both anterior elevation and scapular plane elevation. The SEM was less than 10 degrees for both tasks except for superior and inferior rotation. Based on the results of this study, quantification of scapular motion using the depth sensor was considered to be good from the standpoint of reliability, but improvement of accuracy and examination of validity need to be examined.