System and method for removing artifacts from waveforms
AssigneeCovidien LP
InventorsLi Li, Paul D. Mannheimer
Life of this patent
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Abstract
A technique is provided for processing a physiological signal to compensate for artifacts. The technique includes identifying artifacts within the physiological signal. The technique also includes performing one or more multi-resolution decompositions, such as wavelet transformations, on the physiological signal and compensating for the identified artifacts in some or all of the respective decomposition components. The modified decomposition components may be reconstructed to generate an artifact-compensated signal which may be provided to a monitor or other device which is otherwise not configured to compensate for signal artifacts.
Claims21
A method for processing a physiological signal, comprising:
- using one or more processors of a sensor, a cable coupling the sensor to a monitor, or an intermediate device disposed between the sensor and the monitor, or any combination thereof, to perform the steps of:
- obtaining a physiological signal in the time domain from the sensor;
- identifying one or more artifacts in the physiological signal in the time domain;
- performing a wavelet decomposition on the physiological signal to generate two or more wavelet coefficients;
- generating an artifact-compensated signal in the time domain based on the one or more artifacts that are identified in the time domain and the two or more wavelet coefficients;
- and
- providing the artifact-compensated signal to the monitor, wherein the monitor is configured to display the artifact-compensated signal or to display one or more physiological parameters based on the artifact-compensated signal.
A method for processing a physiological signal, comprising:
- using one or more processors of a sensor, a monitor, a cable coupling the sensor to the monitor, or an intermediate device disposed between the sensor and the monitor, or any combination thereof, to perform the steps of:
- obtaining a physiological signal in the time domain from the sensor;
- identifying one or more artifacts in the physiological signal in the time domain;
- performing a wavelet decomposition on the physiological signal to generate two or more wavelet coefficients;
- generating an artifact-compensated signal in the time domain based on the one or more artifacts that are identified in the time domain and the two or more wavelet coefficients;
- and
- using the artifact-compensated signal to determine one or more physiological parameters.
A method for processing a physiological signal, comprising:
- using one or more processors to perform the steps of:
- processing the physiological signal in the time domain to identify one or more artifacts within the physiological signal;
- applying a wavelet transform to the physiological signal to generate a plurality of coefficients;
- adjusting the plurality of coefficients to reduce one or more coefficients of the plurality of coefficients that correspond to the one or more artifacts identified in the time domain;
- and
- reconstructing the adjusted plurality of coefficients using an inverse wavelet transform to generate an artifact-compensated signal in the time domain.
Dependencies are inferred from the claim text.