System und Verfahren zur Bestimmung einer videobasierten Pulstransitzeit aus Zeitreihen Signalen

Details

Veröffentlichungs-Nr.

EP2848193

Aktenzeichen

EP14183820

Anmeldetag

5. September 2014

Veröffentlichung

7. Dezember 2022

Erteilung

7. Dezember 2022

Rechtsraum

EP

IPC

A61B5/021G06T7/20// A61B5/00G06T7/00

Abstract

What is disclosed is a system and method for determining a subject of interest's arterial pulse transit time from time-varying source signals generated from video images. In one embodiment, a video imaging system is used to capture a time-varying source signal of a proximal and distal region of a subject of interest. The image frames are processed to isolate localized areas of a proximal and distal region of exposed skin of the subject. A time-series signal for each of the proximal and distal regions is extracted from the source video images. A phase angle is computed with respect to frequency for each of the time-series signals to produce respective phase v/s frequency curves for each region. Slopes within a selected cardiac frequency range are extracted from each of the phase curves and a difference is computed between the two slopes to obtain an arterial pulse transit time for the subject.

Anmelder

Firma

Xerox Corporation

Land

🇺🇸 USA

Fachgebiete