SYSTEMS AND METHODS FOR PROCESSING PHYSIOLOGICAL SIGNALS IN WAVELET SPACE
First Claim
1. A method for processing a physiological signal of a subject, comprising:
- receiving, from a sensor, the physiological signal;
determining, using a processor, a pulse rate of the subject based at least in part on the physiological signal;
transforming, using the processor, the physiological signal into a transformed signal based at least in part on a wavelet transform;
determining, using the processor, a quality associated with each of a plurality of scales of the transformed signal, wherein each of the plurality of scales is based at least in part on the pulse rate;
combining, using the processor, the plurality of scales of the transformed signal to generate combined scale data based at least in part on the associated qualities; and
determining, using the processor, physiological information of the subject based at least in part on the combined scale data.
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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.
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Citations
10 Claims
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1. A method for processing a physiological signal of a subject, comprising:
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receiving, from a sensor, the physiological signal; determining, using a processor, a pulse rate of the subject based at least in part on the physiological signal; transforming, using the processor, the physiological signal into a transformed signal based at least in part on a wavelet transform; determining, using the processor, a quality associated with each of a plurality of scales of the transformed signal, wherein each of the plurality of scales is based at least in part on the pulse rate; combining, using the processor, the plurality of scales of the transformed signal to generate combined scale data based at least in part on the associated qualities; and determining, using the processor, physiological information of the subject based at least in part on the combined scale data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification