Method and apparatus for reducing motion artifacts in ECG signals
First Claim
1. A method of reducing motion artifacts in ECG signals, comprising:
- acquiring, via an acquiring unit, a current beat from a continuously measured ECG signal of a patient;
calculating, via a first calculating unit, a correlation coefficient between a previous mean value beat and the current beat in the ECG signal;
determining, via a determining unit, weights to be assigned to the previous mean value beat and the current beat based on the correlation coefficient; and
calculating, via a second calculating unit, a current mean value beat based on (i) the previous mean value beat, (ii) the current beat, and (iii) the determined weights respectively assigned to the previous mean value beat and the current beat, wherein the current mean value beat comprises a motion artifact reduced beat having reduced motion artifacts over the current beat in the ECG signal.
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Abstract
The present invention provides a method and apparatus for reducing motion artifacts in ECG signals. According to an aspect of the present invention, there is proposed a method of reducing motion artifacts in ECG signals, comprising: acquiring a current beat from a continuously measured ECG signal of a patient; calculating a correlation coefficient between a previous mean value beat and the current beat in the ECG signal; determining the weights to be assigned to the previous mean value beat and the current beat based on the correlation coefficient; and calculating a current mean value beat based on the previous mean value beat, the current beat, and the weights thereof. Accordingly, the novel method of deriving the current mean value beat may reduce ECG artifacts due to patient movement in such a manner that the SNR of the ECG signal can be improved substantially.
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Citations
15 Claims
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1. A method of reducing motion artifacts in ECG signals, comprising:
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acquiring, via an acquiring unit, a current beat from a continuously measured ECG signal of a patient; calculating, via a first calculating unit, a correlation coefficient between a previous mean value beat and the current beat in the ECG signal; determining, via a determining unit, weights to be assigned to the previous mean value beat and the current beat based on the correlation coefficient; and calculating, via a second calculating unit, a current mean value beat based on (i) the previous mean value beat, (ii) the current beat, and (iii) the determined weights respectively assigned to the previous mean value beat and the current beat, wherein the current mean value beat comprises a motion artifact reduced beat having reduced motion artifacts over the current beat in the ECG signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus for reducing motion artifacts in ECG signals, comprising:
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an acquiring unit for acquiring a current beat from a continuously measured ECG signal of a patient; a first calculating unit for calculating a correlation coefficient between a previous mean value beat and the current beat in the ECG signal; a determining unit for determining the weights to be assigned to the previous mean value beat and the current beat based on the correlation coefficient; and a second calculating unit for calculating a current mean value beat based on (i) the previous mean value beat, (ii) the current beat, and (iii) the determined weights respectively assigned to the previous mean value beat and the current beat, wherein the current mean value beat comprises a motion artifact reduced beat having reduced motion artifacts over the current beat in the ECG signal. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification