Systems and methods for processing physiological signals in wavelet space
First Claim
1. A method for processing a physiological signal, comprising:
- receiving, from a sensor, an electronic signal representative of a physiological process;
using processor equipment for;
transforming the electronic signal into a transformed signal based at least in part on a continuous wavelet transformation,generating a scalogram based at least in part on the transformed signal,identifying, within the scalogram, a first scale band associated with the physiological process,identifying, directly within the scalogram, a plurality of scale bands related to the first scale band,determining a band quality associated with each identified scale band,combining the identified scale bands based at least in part on the associated band qualities, anddetermining information regarding the physiological process based at least in part on the combining; and
outputting the information to an output device.
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Accused Products
Abstract
Methods and systems are disclosed for analyzing multiple scale bands in the scalogram of a physiological signal in order to obtain information about a physiological process. An analysis may be performed to identify multiple scale bands that are likely to contain the information sought. Each scale band may be assessed to determine a band quality, and multiple bands may be combined based on the band quality. Information about a physiological process may determined based on the combined band. In an embodiment, analyzing multiple scale bands in a scalogram arising from a wavelet transformation of a photoplethysmograph signal may yield clinically relevant information about, among other things, the blood oxygen saturation of a patient.
211 Citations
20 Claims
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1. A method for processing a physiological signal, comprising:
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receiving, from a sensor, an electronic signal representative of a physiological process; using processor equipment for; transforming the electronic signal into a transformed signal based at least in part on a continuous wavelet transformation, generating a scalogram based at least in part on the transformed signal, identifying, within the scalogram, a first scale band associated with the physiological process, identifying, directly within the scalogram, a plurality of scale bands related to the first scale band, determining a band quality associated with each identified scale band, combining the identified scale bands based at least in part on the associated band qualities, and determining information regarding the physiological process based at least in part on the combining; and outputting the information to an output device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A system for processing a physiological signal, comprising:
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an output device, capable of receiving an electronic signal representative of information regarding a physiological process; and a processor, communicably coupled to the output device and capable of receiving an electronic signal representative of a physiological process, the processor being capable of; transforming the electronic signal representative of a physiological process into a transformed signal based at least in part on a continuous wavelet transformation, generating a scalogram based at least in part on the transformed signal, identifying, within the scalogram, a first scale band associated with the physiological process, identifying, directly within the scalogram, a plurality of scale bands related to the first scale band, determining a band quality associated with each identified scale band, combining the identified scale bands based at least in part on the associated band qualities, determining information regarding the physiological process based at least in part on the combining, and outputting an electronic signal representative of the information to the output device. - View Dependent Claims (14, 15, 16, 17)
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18. Non-transitory computer-readable medium for use in processing a physiological signal, the non-transitory computer-readable medium having computer program instructions recorded thereon for:
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transforming a signal representative of a physiological process into a transformed signal based at least in part on a continuous wavelet transformation, generating a scalogram based at least in part on the transformed signal, identifying, within the scalogram, a first scale band associated with the physiological process, identifying, directly within the scalogram, a plurality of scale bands related to the first scale band, determining a band quality associated with each identified scale band, combining the identified scale bands based at least in part on the associated band qualities, and determining information regarding the physiological process based at least in part on the combining. - View Dependent Claims (19, 20)
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Specification