title: Accelerometer and gyroscope based gait analysis using spectral analysis of patients with osteoarthritis of the knee.
abstract: [Purpose] A wide variety of accelerometer tools are used to estimate human movement, but there are no adequate data relating to gait symmetry parameters in the context of knee osteoarthritis. This study's purpose was to evaluate a 3D-kinematic system using body-mounted sensors (gyroscopes and accelerometers) on the trunk and limbs. This is the first study to use spectral analysis for data post processing. [Subjects] Twelve patients with unilateral knee osteoarthritis (OA) (10 male) and seven age-matched controls (6 male) were studied. [Methods] Measurements with 3-D accelerometers and gyroscopes were compared to video analysis with marker positions tracked by a six-camera optoelectronic system (VICON 460, Oxford Metrics). Data were recorded using the 3D-kinematic system. [Results] The results of both gait analysis systems were significantly correlated. Five parameters were significantly different between the knee OA and control groups. To overcome time spent in expensive post-processing routines, spectral analysis was performed for fast differentiation between normal gait and pathological gait signals using the 3D-kinematic system. [Conclusions] The 3D-kinematic system is objective, inexpensive, accurate and portable, and allows long-term recordings in clinical, sport as well as ergonomic or functional capacity evaluation (FCE) settings. For fast post-processing, spectral analysis of the recorded data is recommended.
authors.affiliation: Institute for Diagnostic and Interventional Radiology, Heart Center, University Medical Center Goettingen, Germany ; DZHK, German Center for Heart Research, Germany ; Department of Sports Medicine, University Medical Center Goettingen, Germany.
authors.forename: Wieland
authors.initials: W
authors.lastname: Staab
authors.affiliation: Department of Sports Medicine, University Medical Center Goettingen, Germany.
authors.forename: Ralf
authors.initials: R
authors.lastname: Hottowitz
authors.affiliation: DZHK, German Center for Heart Research, Germany ; Department of Cardiology and Pneumology, Heart Center, University Medical Center Goettingen, Germany ; Division of Imaging Sciences and Biomedical Engineering, King's College London, United Kingdom.
authors.forename: Christian
authors.initials: C
authors.lastname: Sohns
authors.affiliation: Institute for Diagnostic and Interventional Radiology, Heart Center, University Medical Center Goettingen, Germany ; DZHK, German Center for Heart Research, Germany.
authors.forename: Jan Martin
authors.initials: JM
authors.lastname: Sohns
authors.affiliation: Department of Orthopedics, University Medical Center Würzburg, Germany.
authors.forename: Fabian
authors.initials: F
authors.lastname: Gilbert
authors.affiliation: Institute for Diagnostic and Interventional Radiology, Heart Center, University Medical Center Goettingen, Germany.
authors.forename: Jan
authors.initials: J
authors.lastname: Menke
authors.affiliation: Department of Sports Medicine, University Medical Center Goettingen, Germany.
authors.forename: Andree
authors.initials: A
authors.lastname: Niklas
authors.affiliation: Institute for Diagnostic and Interventional Radiology, Heart Center, University Medical Center Goettingen, Germany ; DZHK, German Center for Heart Research, Germany.
authors.forename: Joachim
authors.initials: J
authors.lastname: Lotz
keywords: Accelerometer; Gait; Gyroscope