Expert system to facilitate source localization of brain electrical activity
First Claim
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1. A system to localize a source of electrical activity in a patient'"'"'s body, the system comprising:
- a non-transitory computer-readable medium to store instructions; and
a processor to facilitate execution of the instructions to at least;
preprocess electrical data corresponding to electrical signals acquired from a patient by using a spectral analysis function to determine frequency characteristics of the electrical data and a filter function to filter the electrical data;
represent the source of electrical activity with an inverse model;
represent geometry and electrical characteristics of a spatial region of interest in the patient'"'"'s body based on the inverse model with a forward model;
compute a location for the source of electrical activity within the spatial region of interest based on the preprocessed electrical data, the inverse model and the forward model;
evaluate an acceptability of the computed location for the source of electrical activity;
selectively adjust the filter function based on the frequency characteristics based on the evaluation of the acceptability of the computed location for the source of electrical activity;
re-compute the location for the source of electrical activity based on the selective adjustment; and
generate an output comprising the location for the source of electrical activity.
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Abstract
A system or method can facilitate source localization of brain electrical activity. In one example, an expert system can be utilized to evaluate the source localization results and, based on the acceptability of the results, adjust a data preparation phase to provide for acceptable source localization.
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Citations
18 Claims
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1. A system to localize a source of electrical activity in a patient'"'"'s body, the system comprising:
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a non-transitory computer-readable medium to store instructions; and a processor to facilitate execution of the instructions to at least; preprocess electrical data corresponding to electrical signals acquired from a patient by using a spectral analysis function to determine frequency characteristics of the electrical data and a filter function to filter the electrical data; represent the source of electrical activity with an inverse model; represent geometry and electrical characteristics of a spatial region of interest in the patient'"'"'s body based on the inverse model with a forward model; compute a location for the source of electrical activity within the spatial region of interest based on the preprocessed electrical data, the inverse model and the forward model; evaluate an acceptability of the computed location for the source of electrical activity; selectively adjust the filter function based on the frequency characteristics based on the evaluation of the acceptability of the computed location for the source of electrical activity; re-compute the location for the source of electrical activity based on the selective adjustment; and generate an output comprising the location for the source of electrical activity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A non-transitory computer-readable medium having instructions which, when executed, cause a processor to:
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prepare brain electrical data acquired from a patient and geometry data, wherein the preparation of the brain electrical data includes using a spectral analysis function to determine frequency characteristics of the electrical data and filtering the electrical data acquired for the patient using a filter; perform source localization based on the prepared brain electrical data and geometry data to determine a location of a source of electrical activity; implement an expert system to evaluate an acceptability of the source localization and to adjust at least one of the preparation of the brain electrical data and the geometry data if the acceptability of the source localization is not within a predetermined acceptability level, wherein the expert system is implemented to adjust at least one parameter of the filter to provide an adjusted filter based on the frequency characteristics based on the acceptability of the source localization of the brain electrical data, and the source localization is re-performed based on modified prepared electrical data that is generated based on filtering using the adjusted filter; store output data corresponding to the location of the source of electrical activity if the acceptability of the source localization is within the predetermined acceptability level; and generate an output comprising the location for the source of electrical activity. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification