System for processing physiological data
First Claim
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1. A method comprising:
- generating a denoised ECG signal from a digitized ECG signal by reducing in-band noise to provide the denoised ECG signal having, relative to the digitized ECG signal, an improved signal to noise ratio of at least 15 dB as measured by the ANSI/AAMI EC57;
1998 with a quality of signal reconstruction of greater than 95%.
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Abstract
Physiological signals such as ECG signals are obtained from a patient. In accordance with one or more embodiments, an apparatus, system and/or method is directed to process the digitized ECG signals (e.g., by removing noise).
82 Citations
20 Claims
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1. A method comprising:
generating a denoised ECG signal from a digitized ECG signal by reducing in-band noise to provide the denoised ECG signal having, relative to the digitized ECG signal, an improved signal to noise ratio of at least 15 dB as measured by the ANSI/AAMI EC57;
1998 with a quality of signal reconstruction of greater than 95%.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method comprising:
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providing a digitized ECG signal with a signal to noise ratio of 0 dB by adding white noise to a relative clean ECG signal as prescribed by the ANSI/AAMI EC57 standard; and generating a denoised ECG signal from the digitized ECG signal, the denoised ECG signal having, relative to the digitized ECG signal, an improved signal to noise ratio of at least 15 dB as measured by the ANSI/AAMI EC57;
1998 with a quality of signal reconstruction of greater than 95%.
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10. An apparatus comprising:
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an input port; and a computing circuit configured and arranged to generate a denoised ECG signal by reducing in-band noise in a digitized ECG signal received via the input port, the denoised ECG signal having, relative to the digitized ECG signal, an improved signal to noise ratio of at least 15 dB as measured by the ANSI/AAMI EC57;
1998 with a quality of signal reconstruction of greater than 95%. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. An apparatus comprising:
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an input port; and a computing circuit configured and arranged to generate a denoised ECG signal from a digitized ECG signal received via the input port, the denoised ECG signal having, relative to the digitized ECG signal, an improved signal to noise ratio of at least 15 dB as measured by the ANSI/AAMI EC57;
1998 with a quality of signal reconstruction of greater than 95%, bydecomposing the digitized ECG signal into subcomponents; identifying a first time window in the cardiac cycle that includes a QRS complex; identifying at least one time window in the cardiac cycle that does not include the QRS complex; for each of the identified time windows, identifying target subcomponents as subcomponents that contain more energy that is within the band of frequencies characteristic of a desired ECG signal than energy that is outside the band of frequencies of the desired ECG signal; and constructing a denoised ECG signal using at least two of the identified target subcomponents. - View Dependent Claims (19)
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20. An apparatus comprising:
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an ECG electrode configured and arranged to adhere to a patient and to obtain ECG signals from the patient; a digitizing circuit configured and arranged to digitize the ECG signals; a computing circuit and configured and arranged to denoise the digitized ECG signals by reducing in-band noise to provide an improved signal to noise ratio of at least 15 dB as measured by ANSI/AAMI EC57;
1998 with a quality of signal reconstruction of greater than 95%; anda housing that houses the digitizing circuit and the computing circuit, the housing being configured and arranged for coupling to the ECG electrode while the ECG electrode is adhered to the patient, and being configured and arranged with the ECG electrode to fully support the weight of the housing and its contents while the ECG electrode is adhered to and obtaining the ECG signals from the patient.
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Specification