Method and system for the extraction of cardiac artifacts from EEG signals
First Claim
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1. A system for processing a signal representative of cerebral activity, said signal including at least one cardiac artifact, the system comprising:
- means for identifying a first region and a second region of said signal, said first region including one of said cardiac artifacts, said second region being temporally adjacent said first region;
means for copying said second region of said signal into said first region of said signal.
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Abstract
The disclosed filter removes cardiac artifacts from signals representative of a patient'"'"'s cerebral activity. The filter preferably replaces portions of the signal including artifacts with temporally adjacent artifact free portions.
85 Citations
22 Claims
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1. A system for processing a signal representative of cerebral activity, said signal including at least one cardiac artifact, the system comprising:
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means for identifying a first region and a second region of said signal, said first region including one of said cardiac artifacts, said second region being temporally adjacent said first region; means for copying said second region of said signal into said first region of said signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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- 8. An artifact reduction filter for processing an input signal representative of cerebral activity, a first interval of said input signal being substantially free of cardiac artifacts, a second interval of said input signal including a cardiac artifact, said artifact reduction filter generating a reduced artifact output signal, said reduced artifact output signal including a first interval corresponding temporally to said first interval of said input signal and including a second interval corresponding temporally to said second interval of said input signal, said artifact reduction filter using said first interval of said input signal to generate said first interval of said reduced artifact output signal, said artifact reduction filter using a portion of said input signal other than said second interval to generate said second interval of said reduced artifact output signal.
- 14. A filter for receiving and processing first and second input signals primarily representative of cerebral activity, a first interval of said first input signal being substantially free of cardiac artifacts, a second interval of said first input signal including a cardiac artifact, said filter generating a reduced artifact output signal, said reduced artifact output signal including a first interval temporally corresponding to said first interval of said first input signal and a second interval temporally corresponding to said second interval of said first input signal, said filter using said first interval of said first input signal to generate said first interval of said reduced artifact output signal, said filter using a portion of said second input signal to generate said second interval of said output signal.
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15. A method of generating a reduced artifact output signal from an input signal representative of cerebral activity comprising:
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using the input signal to generate the reduced artifact output signal when the input signal does not include a cardiac artifact; using a portion of the input signal distinct from the cardiac artifact to generate the reduced artifact output signal when the input signal does include a cardiac artifact.
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16. A method of generating a reduced artifact output signal from a first input signal primarily representative of cerebral activity and a second input signal primarily representative of cerebral activity comprising:
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using the first input signal to generate the reduced artifact output signal when the first input signal does not include a cardiac artifact; using a portion of the second input signal to generate the reduced artifact output signal when the first input signal does include a cardiac artifact. - View Dependent Claims (20, 21, 22)
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Specification