Cerebral biopotential analysis system and method
First Claim
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1. A method of noninvasively detecting cerebral phenomena comprising the steps of:
- acquiring electroencephalographic signals through at least one electrode from a body surface of a subject being analyzed;
band pass filtering said electroencephalographic signals to obtain filtered signals in a desired frequency range;
dividing said filtered signals into a plurality of data records;
characterizing dynamic phase relations within said filtered signals by processing said filtered signals to generate Kth-order spectral values, where K is an integer greater than 2;
deriving from said generated Kth-order spectral values, a diagnostic index that quantifies the detected cerebral phenomena.
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Abstract
Disclosed is a real time diagnostic apparatus and method quantitatively evaluating, in a noninvasive manner, cerebral phenomena. Surface electroencephalographic (EEG) signals are obtained and filtered in a desired frequency range. Digital EEG data is normalized and the dynamic phase and density relations within the signal are characterized by processing the filtered signals to generate Kth-ordered spectral values where K is an integer greater than 2. A diagnostic index which quantifies the detected cerebral phenomena is then derived from the generated Kth-order spectral values.
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Citations
45 Claims
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1. A method of noninvasively detecting cerebral phenomena comprising the steps of:
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acquiring electroencephalographic signals through at least one electrode from a body surface of a subject being analyzed; band pass filtering said electroencephalographic signals to obtain filtered signals in a desired frequency range; dividing said filtered signals into a plurality of data records; characterizing dynamic phase relations within said filtered signals by processing said filtered signals to generate Kth-order spectral values, where K is an integer greater than 2; deriving from said generated Kth-order spectral values, a diagnostic index that quantifies the detected cerebral phenomena. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A system for noninvasively detecting cerebral phenomena comprising:
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means for acquiring electroencephalographic signals through at least one electrode from a body surface of a subject being analyzed; means for band pass filtering said electroencephalographic signals to eliminate those signals outside a desired frequency range; means for dividing said filtered signals into a plurality of data records; means for generating Kth-order spectral values capable of characterizing dynamic phase relations within said filtered electroencephalographic signals where K is an integer greater than 2; means for deriving a diagnostic index that quantifies the detected cerebral phenomena. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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40. A method of generating a diagnostic index for quantifying the presence or absence of a phenomena which is represented by spectral values generated from acquired electrical signals of the phenomena, said method comprising the steps of:
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sorting said spectral values into predetermined bins of ranges of spectral values; summing all of the spectral values in each bin; multiplying the sum of spectral values in each bin by a predetermined coefficient to obtain a bin product; summing said bin products to obtain a diagnostic index which represents a degree of presence or absence of said phenomena. - View Dependent Claims (41)
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42. A system for generating a diagnostic index for quantifying the presence or absence of a phenomena which is represented by spectral values generated from acquired electrical signals of the phenomena, said system comprising:
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means for sorting said spectral values into predetermined bins of ranges of spectral values; means for summing all of the spectral values in each bin; means for multiplying the sum of spectral values in each bin by a predetermined coefficient to obtain a bin product; means for summing said bin products to obtain a diagnostic index which represents a degree of presence or absence of said phenomena. - View Dependent Claims (43)
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44. A method of noninvasively detecting cerebral phenomena comprising the steps of:
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acquiring electroencephalographic signals through at least one electrode from a body surface of a subject being analyzed; band pass filtering said electroencephalographic signals to obtain filtered signals in a desired frequency range; dividing said filtered signals into a plurality of data records; characterizing dynamic phase relations within said filtered signals by processing said filtered signals to generate third-order moment values; deriving from said generated third-order moment values, a diagnostic index that quantifies the detected cerebral phenomena.
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45. A system for noninvasively detecting cerebral phenomena comprising:
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means for acquiring electroencephalographic signals through at least one electrode from a body surface of a subject being analyzed; means for band pass filtering said electroencephalographic signals to eliminate those signals outside a desired frequency range; means for dividing said filtered signals into a plurality of data records; means for generating third-order moment values capable of characterizing dynamic phase relations within said filtered electroencephalographic signals; means for deriving a diagnostic index that quantifies the detected cerebral phenomena.
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Specification