Accuracy, reproducibility, and sources of error of the Ariel Performance Analysis System in measuring angular and linear displacement using wide angle lenses.

摘要

Computer-assisted motion analysis is a new technology for studying movement. As with any measurement tool, validity and reliability of the system must be evaluated and sources of error must be minimized prior to clinical use. The purpose of this study was to determine accuracy and reproducibility of angular and linear measurements of static models obtained with the Ariel Performance Analysis System (APAS), using wide angle lenses. The average mean error of the angular estimation test was 0.213