Title :
Validated extraction of gait events from 3D accelerometer recordings
Author :
Boutaayamou, Mohamed ; Schwartz, Christopher ; Stamatakis, Julien ; Denoel, Vincent ; Maquet, Didier ; Forthomme, Benedicte ; Croisier, Jean-Louis ; Macq, B. ; Verly, Jacques G. ; Garraux, Gaetan ; Bruls, Olivier
Author_Institution :
Lab. of Human Motion Anal., Univ. of Liege (ULg), Liege, Belgium
Abstract :
This work is part of a project that deals with the three-dimensional (3D) analysis of normal and pathological gaits based on a newly developed system for clinical applications, using low-cost wireless accelerometers and a signal processing algorithm. This system automatically extracts relevant gait events such as the heel strikes (HS) and the toe-offs (TO), which characterize the stance and the swing phases of walking. The performances of the low-cost accelerometer hardware and related algorithm have been compared to those obtained by a kinematic 3D analysis system and a force plate, used as gold standard methods. The HS and TO times obtained from the gait data of 7 healthy volunteers (147 trials) have been found to be (mean ± standard deviation) 0.42±7.92 ms and 3.11±10.08 ms later than those determined by the force plate, respectively. The experimental results demonstrate that the new hardware and associated algorithm constitute an effective low-cost gait analysis system, which could thus be used for the assessment of mobility in routine clinical practice.
Keywords :
accelerometers; feature extraction; force sensors; gait analysis; kinematics; medical signal processing; wireless sensor networks; 3D accelerometer recording; calidated extraction; force plate; gait event extraction; heel strikes; kinematic 3D analysis system; low-cost accelerometer hardware; low-cost gait analysis system; low-cost wireless accelerometer; mobility assessment; normal gait; pathological gait; routine clinical practice; signal processing algorithm; three-dimensional analysis; toe-offs; walking stance; walking swing phases; Acceleration; Accelerometers; Algorithm design and analysis; Force; Hardware; Standards; Three-dimensional displays; 3D; Accelerometers; gait events; heel strike; motion analysis; toe-off; walking;
Conference_Titel :
3D Imaging (IC3D), 2012 International Conference on
Conference_Location :
Lie??ge
DOI :
10.1109/IC3D.2012.6615147