MOTION ROBUST VITAL SIGNAL MONITORING
First Claim
1. A device for extracting physiological information from remotely detected electromagnetic radiation emitted or reflected by a subject, comprising:
- an interface for receiving a data stream derivable from electromagnetic radiation emitted or reflected by a subject; and
a processing unit configured for processing the sequence of signal samples, comprising;
a stabilizer configured for deriving a sequence of derivative motion compensated samples;
a motion compensation assessment module configured for detecting an evaluation parameter representative of motion compensation accuracy;
an extractor configured for selectively deriving at least one characteristic signal at least partially indicative of an at least partially periodic indicative motion pattern; and
an analyzer configured for determining temporal variations in the characteristic signal, the temporal variations being representative of at least one vital signal;
wherein the data stream comprises a sequence of signal samples indicative of desired subject motion and of disturbing motion, the signal samples representing at least one region of interest exhibiting the at least partially periodic indicative motion pattern attributable to at least one physiological parameter, and a non-indicative motion region;
wherein the derivative motion compensated samples are at least partially compensated for undesired overall motion;
wherein the at least partially periodic indicative motion pattern is derived from the sequence of motion compensated samples; and
wherein deriving the characteristic signal is performed depending on the detected evaluation parameter.
1 Assignment
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Accused Products
Abstract
The present invention relates to a device and a method for extracting physiological information from remotely detected electromagnetic radiation emitted or reflected by a subject. A data stream derivable from electromagnetic radiation emitted or reflected by a subject is received. The data stream comprises a sequence of signal samples indicative of desired subject motion and of disturbing motion. The signal samples represent at least one region of interest exhibiting an at least partially periodic indicative motion pattern attributable to at least one physiological parameter, and a non-indicative motion region. The sequence of signal samples is processed, comprising deriving a sequence of derivative motion compensated samples at least partially compensated for undesired overall motion; detecting an evaluation parameter representative of motion compensation accuracy; and deriving at least one characteristic signal at least partially indicative of the at least partially periodic indicative motion pattern from the sequence of motion compensated samples, wherein deriving the characteristic signal is performed depending on the detected evaluation parameter.
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Citations
25 Claims
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1. A device for extracting physiological information from remotely detected electromagnetic radiation emitted or reflected by a subject, comprising:
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an interface for receiving a data stream derivable from electromagnetic radiation emitted or reflected by a subject; and a processing unit configured for processing the sequence of signal samples, comprising; a stabilizer configured for deriving a sequence of derivative motion compensated samples; a motion compensation assessment module configured for detecting an evaluation parameter representative of motion compensation accuracy; an extractor configured for selectively deriving at least one characteristic signal at least partially indicative of an at least partially periodic indicative motion pattern; and an analyzer configured for determining temporal variations in the characteristic signal, the temporal variations being representative of at least one vital signal; wherein the data stream comprises a sequence of signal samples indicative of desired subject motion and of disturbing motion, the signal samples representing at least one region of interest exhibiting the at least partially periodic indicative motion pattern attributable to at least one physiological parameter, and a non-indicative motion region; wherein the derivative motion compensated samples are at least partially compensated for undesired overall motion; wherein the at least partially periodic indicative motion pattern is derived from the sequence of motion compensated samples; and wherein deriving the characteristic signal is performed depending on the detected evaluation parameter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A device for extracting physiological information from remotely detected electromagnetic radiation emitted or reflected by a subject, comprising:
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an interface for receiving a data stream derivable from electromagnetic radiation emitted or reflected by a subject; and a processing unit configured for processing the sequence of signal samples, comprising; a stabilizer means for deriving a sequence of derivative motion compensated samples; a motion compensation assessment means configured for detecting an evaluation parameter representative of motion compensation accuracy; and an extractor means configured for selectively deriving at least one characteristic signal indicative of an at least partially periodic indicative motion pattern; wherein the data stream comprises a sequence of signal samples indicative of desired subject motion attributable to at least one physiological parameter, and of disturbing motion; wherein the derivative motion compensated samples are at least partially compensated for undesired overall motion; wherein the at least partially periodic indicative motion pattern is derived from the sequence of motion compensated samples; and wherein deriving the characteristic signal is performed depending on the detected evaluation parameter. - View Dependent Claims (13, 14, 15)
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16. A device for extracting physiological information from remotely detected electromagnetic radiation emitted or reflected by a subject, comprising:
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an interface for receiving a data stream derivable from electromagnetic radiation emitted or reflected by a subject; and a processing unit configured for processing the sequence of signal samples, comprising; a stabilizer configured for deriving a sequence of derivative motion compensated samples; a motion compensation assessment module configured for detecting an evaluation parameter representative of motion compensation accuracy; an extractor configured for selectively deriving at least one characteristic signal at least partially indicative of an at least partially periodic indicative pattern; and an analyzer configured for determining temporal variations in the characteristic signal, the temporal variations being representative of at least one vital signal; wherein the data stream comprises a sequence of signal samples including physiological information and indicative of disturbing motion, the signal samples representing at least one region of interest exhibiting the at least partially periodic indicative pattern attributable to at least one physiological parameter, and a non-indicative motion region; wherein the derivative motion compensated samples are at least partially compensated for undesired overall motion; wherein the at least partially periodic indicative pattern is derived from the sequence of motion compensated samples; and wherein deriving the characteristic signal is performed depending on the detected evaluation parameter. - View Dependent Claims (17)
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18. A method for extracting physiological information from remotely detected electromagnetic radiation emitted or reflected by a subject, comprising:
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receiving a data stream derivable from electromagnetic radiation emitted or reflected by a subject; and processing the sequence of signal samples, comprising; deriving a sequence of derivative motion compensated samples at least partially compensated for undesired overall motion; detecting an evaluation parameter representative of motion compensation accuracy; and deriving at least one characteristic signal at least partially indicative of an at least partially periodic indicative motion; wherein the data stream comprises a sequence of signal samples indicative of desired subject motion and of disturbing motion, the signal samples representing at least one region of interest exhibiting an at least partially periodic indicative motion pattern attributable to at least one physiological parameter, and a non-indicative motion region; wherein the at least partially periodic indicative motion pattern is derived from the sequence of motion compensated samples; and wherein deriving the characteristic signal is performed depending on the detected evaluation parameter. - View Dependent Claims (19, 20, 21, 24)
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22. A method for extracting physiological information from remotely detected electromagnetic radiation emitted or reflected by a subject, comprising:
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receiving a data stream derivable from electromagnetic radiation emitted or reflected by a subject, the data stream comprising a sequence of signal samples comprising physiological information and indicative of disturbing motion, the signal samples representing at least one region of interest exhibiting an at least partially periodic indicative pattern attributable to at least one physiological parameter, and a non-indicative motion region; and processing the sequence of signal samples, comprising; deriving a sequence of derivative motion compensated samples at least partially compensated for undesired overall motion; detecting an evaluation parameter representative of motion compensation accuracy; and deriving at least one characteristic signal at least partially indicative of the at least partially periodic indicative pattern from the sequence of motion compensated samples, wherein deriving the characteristic signal is performed depending on the detected evaluation parameter. - View Dependent Claims (23, 25)
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Specification