Benchmarking of a full-body inertial motion capture system for clinical gait analysis

Abstract

In order for gait analysis to be established as part of routine clinical diagnoses, an accurate, flexible and user-friendly motion capture system is required. Commonly used optical, mechanical and acoustic systems offer acceptable accuracy and repeatability, but are often expensive and restricted to laboratory use. Inertial motion capture has seen great innovation in the last few years, but the technology is not yet considered mature enough for clinical gait analysis. In this paper we compare the kinematic reliability of inertial motion capture with optical motion capture during routine gait studies of eight able-bodied subjects. The root mean squared, RMS, and coefficient of correlation, R, was used to compare data sets. Saggital plane joint angles in the knee and hip compared very well. Corresponding transverse and frontal plane values were moderately accurate. The ankle joint angles calculated from the two systems were less accurate. This was believed to be due to the use of different rotation axis orientations used for calculation of angular rotations.

Evaluation of a visual feedback system in gait retraining: A pilot study

“…In order to perform a standardized clinical gait analysis (M1) the evaluated MVN suit (XSens) [25,26] has been applied. During the test, all subjects walked for 5 min on a level hallway up and down (walking distance: 20 m; analyzed: 16 m).…”

A Novel Complimentary Filter for Tracking Hip Angles During Cycling Using Wireless Inertial Sensors and Dynamic Acceleration Estimation

“…Furthermore, the study reports good accuracy in hip angle tracking compared to a gold-standard optical system. Another study comparing Vicon joint angles to the Xsens biomechanical model outputs found similar results, with sagittal plane values being highly correlated and transverse and coronal plane angles being mildly correlated [35]. The analysis investigated the intra-and inter-system differences in hip angle outputs for all three anatomical joint planes of motion due to STA and calibration poses.…”

Investigation of the use of inertial sensing equipment for the measurement of hip flexion and pelvic rotation in horse riders

“…Examples of their use in research studies include analysis of hip joint flexion and extension during human walking gait (Saber-Sheikh et al, 2010); assessment of spasticity assessment in children with Cerebral Palsy (Van den Noort, 2009); and measurement of lumber, hip, knee and ankle joint angles of skiers (Kondo et al, 2012). Cloete and Scheffer (2008) compared inertial motion capture of human gait kinematics against optical motion capture (n=8), demonstrating good reliability for hip and knee joint angle flexion.…”