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1. US20130345568 - Video-based estimation of heart rate variability

Office
United States of America
Application Number 13532057
Application Date 25.06.2012
Publication Number 20130345568
Publication Date 26.12.2013
Grant Number 08977347
Grant Date 10.03.2015
Publication Kind B2
IPC
A61B 5/024
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Measuring for diagnostic purposes; Identification of persons
02Measuring pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography; Heart catheters for measuring blood pressure
024Measuring pulse rate or heart rate
CPC
A61B 5/02405
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Measuring for diagnostic purposes
02Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
024Detecting, measuring or recording pulse rate or heart rate
02405Determining heart rate variability
A61B 5/0004
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Measuring for diagnostic purposes
0002Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
0004characterised by the type of physiological signal transmitted
A61B 5/02416
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Measuring for diagnostic purposes
02Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
024Detecting, measuring or recording pulse rate or heart rate
02416using photoplethysmograph signals, e.g. generated by infra-red radiation
A61B 5/7235
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
A61B 2576/00
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
2576Medical imaging apparatus involving image processing or analysis
Applicants Lalit Keshav Mestha
Xerox Corporation
Survi Kyal
Beilei Xu
Himanshu J. Madhu
Inventors Lalit Keshav Mestha
Survi Kyal
Beilei Xu
Himanshu J. Madhu
Agents Philip E. Blair
Fleit Gibbons Gutman Bongini & Bianco P.L.
Title
(EN) Video-based estimation of heart rate variability
Abstract
(EN)

What is disclosed is a video-based system and method for estimating heart rate variability from time-series signals generated from video images captured of a subject of interest being monitored for cardiac function. In a manner more fully disclosed herein, low frequency and high frequency components are extracted from a time-series signal obtained by processing a video of the subject being monitored. A ratio of the low and high frequency of the integrated power spectrum within these components is computed. Analysis of the dynamics of this ratio over time is used to estimate heart rate variability. The teachings hereof can be used in a continuous monitoring mode with a relatively high degree of measurement accuracy and find their uses in a variety of diverse applications such as, for instance, emergency rooms, cardiac intensive care units, neonatal intensive care units, and various telemedicine applications.

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