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1. WO2007088374 - GAIT ANALYSIS

Publication Number WO/2007/088374
Publication Date 09.08.2007
International Application No. PCT/GB2007/000358
International Filing Date 02.02.2007
IPC
A61B 5/11 2006.01
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Measuring for diagnostic purposes; Identification of persons
103Measuring devices for testing the shape, pattern, size or movement of the body or parts thereof, for diagnostic purposes
11Measuring movement of the entire body or parts thereof, e.g. head or hand tremor or mobility of a limb
G06K 9/00 2006.01
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
9Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
CPC
A61B 2562/0219
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
2562Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
02Details of sensors specially adapted for in-vivo measurements
0219Inertial sensors, e.g. accelerometers, gyroscopes, tilt switches
A61B 5/1038
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Measuring for diagnostic purposes
103Detecting, measuring or recording devices for testing the shape, pattern, ; colour,; size or movement of the body or parts thereof, for diagnostic purposes
1036Measuring load distribution, e.g. podologic studies
1038Measuring plantar pressure during gait
A61B 5/112
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Measuring for diagnostic purposes
103Detecting, measuring or recording devices for testing the shape, pattern, ; colour,; size or movement of the body or parts thereof, for diagnostic purposes
11Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
112Gait analysis
A61B 5/6814
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Measuring for diagnostic purposes
68Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
6801specially adapted to be attached to or worn on the body surface
6813Specially adapted to be attached to a specific body part
6814Head
A61B 5/7253
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Measuring for diagnostic purposes
72Signal processing specially adapted for physiological signals or for diagnostic purposes
7235Details of waveform analysis
7253characterised by using transforms
A61B 5/7257
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Measuring for diagnostic purposes
72Signal processing specially adapted for physiological signals or for diagnostic purposes
7235Details of waveform analysis
7253characterised by using transforms
7257using Fourier transforms
Applicants
  • IMPERIAL INNOVATIONS LIMITED [GB]/[GB] (AllExceptUS)
  • YANG, Guang-Zhong [GB]/[GB] (UsOnly)
  • LO, Benny [CA]/[GB] (UsOnly)
Inventors
  • YANG, Guang-Zhong
  • LO, Benny
Agents
  • KORENBERG, Alexander, Tal
Priority Data
0602127.302.02.2006GB
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) GAIT ANALYSIS
(FR) analyse de démarche
Abstract
(EN)
A method and system for analysing gait patterns of a subject by measuring head acceleration in vertical direction. The system comprises an accelerometer mounted on the head of the subject. The analysis includes calculating a signature from the acceleration data, using a Fourier transform, including energy of the first harmonics and comparing the signature with the baseline signature. Baseline signature is a representative of previously stored signatures. The comparison is done in order to monitor changes in the gait signatures over time. The entropy of the signatures may be used to perform the comparison. A self organised map is used to classify the measured gait signals .
(FR)
L'invention concerne un procédé et un système pour analyser des profils de démarche d'un sujet en mesurant l'accélération de la tête dans une direction verticale. Le système comprend un accéléromètre monté sur la tête du sujet. L'analyse comprend le calcul d'une signature à partir des données d'accélération, à l'aide d'une transformée de Fourier, comprenant l'énergie des premières harmoniques et la comparaison de la signature avec la signature de base. La signature de base est une représentante des signatures stockées précédemment. La comparaison est faite pour surveiller des changements dans les signatures de démarche dans le temps. L'entropie des signatures peut être utilisée pour réaliser la comparaison. Une carte auto-organisée est utilisée pour classer les signaux de démarche mesurés.
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