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US 11,684,287 B2Granted
System and methods for video-based monitoring of vital signs
AssigneeCovidien LP
InventorsPaul S. Addison, David Foo, Dominique Jacquel
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Abstract
The present invention relates to the field of medical monitoring, and in particular non-contact, video-based monitoring of pulse rate, respiration rate, motion, and oxygen saturation. Systems and methods are described for capturing images of a patient, producing intensity signals from the images, filtering those signals to focus on a physiologic component, and measuring a vital sign from the filtered signals.
Claims19
A video-based method of measuring a patient's vital sign, comprising:
- receiving a video signal from a video camera, the video signal having a field of view;
- extracting from the video signal a time-varying color signal for each of a plurality of regions;
- identifying a frequency content of each time-varying color signal;
- selecting two or more non-adjacent regions that have a shared frequency content comprising a modulation at a shared frequency;
- combining the color signals of the selected regions to thereby provide a combined color signal;
- measuring a vital sign from the combined color signal;
- outputting the vital sign for further processing or display;
- and
- updating the selected regions by adding or removing regions from the selected regions based on the frequency content of each region.
6 more elements
A system for video-based measurement of a patient's vital sign, comprising:
- a video camera positioned remote from a patient;
- and
- a hardware memory coupled to the video camera by wired or wireless communication, the memory storing instructions for instructing a processor to:
- extract from a video signal received from the video camera a time-varying color signal for each of a plurality of regions;
- identify a frequency content of each time-varying color signal;
- select two or more non-adjacent regions that have a shared frequency content comprising a modulation at a shared frequency;
- combine the color signals of the selected regions to thereby provide a combined color signal;
- measure a vital sign from the combined color signal;
- output the vital sign for further processing or display;
- and
- update the selected regions by adding or removing regions from the selected regions based on the frequency content of each region;
- receive a video signal from the video camera, the video signal having a field of view.
9 more elements
Dependencies are inferred from the claim text.