Method for processing biometric information, processing device for biometric information, program and storage medium

Abstract

To provide a biological information processing method and a biological information processing device for supporting storage of a brain wave signal high in signal quality.SOLUTION: A biological information processing method includes: a step S1 of acquiring a plurality of brain wave signals indicating brain waves of a subject, each of which is associated with one of a plurality of electrodes, using the plurality of electrodes mounted on the head of the subject; a step S2 of dividing each of the plurality of brain wave signals into a plurality of artifact component signals, each of which indicates a different kind of artifacts and a brain wave component signal; a step S3 of calculating an effective value of the plurality of artifact component signals of each brain wave signal; a step S7 of determining whether or not the effective value of each artifact component signal of each brain wave signal satisfies a predetermined condition; and a step S8 of visually presenting information related to the artifacts associated with the artifact component signal whose effective value satisfies the predetermined condition.SELECTED DRAWING: Figure 3

Claims

1. The steps include: using multiple electrodes attached to the head of a subject, each electrode being associated with one of the multiple electrodes, and acquiring multiple electroencephalogram (EEG) signals representing the subject's electroencephalogram; The steps include obtaining multiple artifact component signals from each of the multiple electroencephalogram signals, each of which exhibits a different type of artifact, The steps include: calculating the effective value of the plurality of artifact component signals for each electroencephalogram signal; The step of determining whether the effective value of each artifact component signal of each electroencephalogram signal satisfies a predetermined condition, The steps include visually presenting information related to artifacts associated with artifact component signals whose effective value satisfies the predetermined conditions, Includes, The information related to the aforementioned artifact is, Information indicating the type of artifact, Information showing measures to remove the aforementioned artifacts, Includes, The visual presentation step includes visually presenting information related to the artifact within the electroencephalogram display area. A method of processing biometric information performed by a computer.

2. A step of acquiring multiple electroencephalogram (EEG) signals representing the brainwaves of a subject, using a plurality of electrodes attached to the head of the subject, each of which is associated with one of the plurality of electrodes, The steps include obtaining multiple artifact component signals from each of the multiple electroencephalogram signals, each of which exhibits a different type of artifact, The steps include: calculating the effective value of the plurality of artifact component signals for each electroencephalogram signal; The step of determining whether the effective value of each artifact component signal of each electroencephalogram signal satisfies a predetermined condition, The steps include visually presenting information related to artifacts associated with artifact component signals whose effective value satisfies the predetermined conditions, Includes, A computer-based bio-information processing method wherein, when at least one of the effective values ​​of the plurality of artifact component signals satisfies the predetermined conditions in each electroencephalogram signal, information indicating the type of artifact mixed into each electroencephalogram signal is visually presented in the electrode image in association with each of the plurality of electrodes.

3. A step of acquiring a plurality of electroencephalogram signals representing the brainwaves of a subject, using a plurality of electrodes attached to the head of the subject, each of which is associated with one of the plurality of electrodes, The steps include obtaining multiple artifact component signals from each of the multiple electroencephalogram signals, each of which exhibits a different type of artifact, The steps include: calculating the effective value of the plurality of artifact component signals for each electroencephalogram signal; The step of determining whether the effective value of each artifact component signal of each electroencephalogram signal satisfies a predetermined condition, The steps include visually presenting information related to artifacts associated with artifact component signals whose effective value satisfies the predetermined conditions, Includes, The plurality of electrodes include the first electrode, The plurality of electroencephalogram signals include a first electroencephalogram signal associated with the first electrode, The aforementioned multiple artifact component signals are The first artifact component signal, which shows the first artifact originating from the living organism, It includes a second artifact component signal that shows a second artifact caused by factors other than living organisms, If the first effective value of the first artifact component signal associated with the first electroencephalogram signal is greater than the first threshold associated with the first effective value, and the second effective value of the second artifact component signal associated with the first electroencephalogram signal is greater than the second threshold associated with the second effective value, then the information associated with the second artifact mixed into the first electroencephalogram signal takes precedence over the information associated with the first artifact mixed into the first electroencephalogram signal. Information related to the second artifact is presented visually, and after the second artifact is removed, information related to the first artifact is presented visually. A method of processing biometric information performed by a computer.

4. The information related to the aforementioned artifact is, Information indicating the type of artifact, Information showing measures to remove the aforementioned artifacts, Includes, The bio-information processing method according to claim 2 or 3, further comprising the step of visually presenting information related to the artifact within the electroencephalogram display area in the visual presentation step.

5. The bio-information processing method according to claim 1 or 3, wherein, when at least one of the effective values ​​of the plurality of artifact component signals satisfies the predetermined conditions in each electroencephalogram signal, information indicating the type of artifact mixed into each electroencephalogram signal is visually presented in the electrode image in association with each of the plurality of electrodes.

6. The plurality of electrodes include the first electrode, The plurality of electroencephalogram signals include a first electroencephalogram signal associated with the first electrode, The aforementioned plurality of artifact component signals include a first artifact component signal that represents the first artifact, When the effective value of the first artifact component signal associated with the first electroencephalogram signal is greater than a predetermined threshold associated with the effective value, information related to the first artifact mixed into the first electroencephalogram signal is visually presented. A method for processing biological information according to any one of claims 1 to 3.

7. Information related to the first artifact mixed into the first electroencephalogram signal is: Information indicating the type of the first artifact, Information showing measures to eliminate the first artifact, The method for processing biological information according to claim 6, including the method described in claim 6.

8. The plurality of electrodes include the first electrode, The plurality of electroencephalogram signals include a first electroencephalogram signal associated with the first electrode, The aforementioned multiple artifact component signals are The first artifact component signal, which shows the first artifact originating from the living organism, It includes a second artifact component signal that shows a second artifact caused by factors other than living organisms, If the first effective value of the first artifact component signal associated with the first electroencephalogram signal is greater than a first threshold associated with the first effective value, and the second effective value of the second artifact component signal associated with the first electroencephalogram signal is greater than a second threshold associated with the second effective value, then information related to the second artifact mixed into the first electroencephalogram signal takes precedence over information related to the first artifact mixed into the first electroencephalogram signal. The method for processing biological information according to claim 1 or 2.

9. Information related to the second artifact is visually presented, and after the second artifact is removed, information related to the first artifact is visually presented. The method for processing biological information according to claim 8.

10. The method for processing biological information according to any one of claims 1 to 3, wherein, under the predetermined conditions, a plurality of predetermined thresholds are set that correspond one-to-one with the effective value of each artifact component signal.

11. The further step includes calculating a plurality of signal quality indices, each representing the signal quality of one of the plurality of EEG signals, based on the effective values ​​of at least a few of the plurality of artifact component signals of each EEG signal. A method for processing biological information according to any one of claims 1 to 3.

12. The process further includes determining an overall signal quality index that indicates the overall signal quality of the plurality of electroencephalogram signals based on the plurality of signal quality indices, If the overall signal quality index is below a predetermined threshold, a step is performed to determine whether the effective value of each artifact component signal of each electroencephalogram signal satisfies a predetermined condition. The method for processing biological information according to claim 11.

13. The aforementioned multiple artifact component signals are The first artifact component signal, which shows the first artifact originating from the living organism, It includes a second artifact component signal that shows a second artifact caused by factors other than living organisms, The aforementioned second artifact is, Artifacts caused by improper attachment of electrodes to the subject, Artifacts caused by lead wires connected to the electrodes, A method for processing biological information according to any one of claims 1 to 3.

14. The method for processing bio-information according to any one of claims 1 to 3, wherein the effective value of the plurality of artifact component signals of each electroencephalogram signal is RMS.

15. A program that causes a computer to execute the biological information processing method described in any one of claims 1 to 3.

16. A computer-readable storage medium in which the program described in claim 15 is stored.

17. Processor and A biological information processing device comprising a memory for storing computer-readable instructions, When the computer-readable instruction is executed by the processor, the biometric information processing device, Using multiple electrodes attached to the subject's head, each electrode is associated with one of the multiple electrodes, and multiple electroencephalogram (EEG) signals representing the subject's brainwaves are acquired. From each of the aforementioned multiple electroencephalogram signals, multiple artifact component signals are obtained, each exhibiting a different type of artifact. The effective value of the plurality of artifact component signals of each electroencephalogram signal is calculated, The effective value of each artifact component signal of each electroencephalogram signal is determined to satisfy a predetermined condition. Visually present information related to artifacts associated with artifact component signals whose RMS values ​​satisfy the predetermined conditions. The information related to the aforementioned artifact is, Information indicating the type of artifact, Information showing measures to remove the aforementioned artifacts, Includes, Information related to the aforementioned artifact is visually presented within the electroencephalogram display area. A biological information processing device.

18. Processor and A biological information processing device comprising a memory for storing computer-readable instructions, When the computer-readable instruction is executed by the processor, the biometric information processing device, Using multiple electrodes attached to the subject's head, each electrode is associated with one of the multiple electrodes, and multiple electroencephalogram (EEG) signals representing the subject's brainwaves are acquired. From each of the aforementioned multiple electroencephalogram signals, multiple artifact component signals are obtained, each exhibiting a different type of artifact. The effective value of the plurality of artifact component signals of each electroencephalogram signal is calculated, The effective value of each artifact component signal of each electroencephalogram signal is determined to satisfy a predetermined condition. Visually present information related to artifacts associated with artifact component signals whose RMS values ​​satisfy the predetermined conditions. The bio-information processing device visually displays information indicating the type of artifact mixed into each electroencephalogram signal in the electrode image when at least one of the effective values ​​of the plurality of artifact component signals in each electroencephalogram signal satisfies the predetermined conditions. A biological information processing device.

19. Processor and A biological information processing device comprising a memory for storing computer-readable instructions, When the computer-readable instruction is executed by the processor, the biometric information processing device, Using multiple electrodes attached to the subject's head, each electrode is associated with one of the multiple electrodes, and multiple electroencephalogram (EEG) signals representing the subject's brainwaves are acquired. From each of the aforementioned multiple electroencephalogram signals, multiple artifact component signals are obtained, each exhibiting a different type of artifact. The effective value of the plurality of artifact component signals of each electroencephalogram signal is calculated, The effective value of each artifact component signal of each electroencephalogram signal is determined to satisfy a predetermined condition. Visually present information related to artifacts associated with artifact component signals whose RMS values ​​satisfy the predetermined conditions. The plurality of electrodes include the first electrode, The plurality of electroencephalogram signals include a first electroencephalogram signal associated with the first electrode, The aforementioned multiple artifact component signals are The first artifact component signal, which shows the first artifact originating from the living organism, It includes a second artifact component signal that shows a second artifact caused by factors other than living organisms, If the first effective value of the first artifact component signal associated with the first electroencephalogram signal is greater than the first threshold associated with the first effective value, and the second effective value of the second artifact component signal associated with the first electroencephalogram signal is greater than the second threshold associated with the second effective value, then the information associated with the second artifact mixed into the first electroencephalogram signal takes precedence over the information associated with the first artifact mixed into the first electroencephalogram signal. Information related to the second artifact is presented visually, and after the second artifact is removed, information related to the first artifact is presented visually. A biological information processing device.

20. The information related to the aforementioned artifact is, Information indicating the type of artifact, Information showing measures to remove the aforementioned artifacts, Includes, Information related to the aforementioned artifact is visually presented within the electroencephalogram display area. The biological information processing device according to claim 18 or 19.

21. The bio-information processing device visually displays information indicating the type of artifact mixed into each electroencephalogram signal in the electrode image when at least one of the effective values ​​of the plurality of artifact component signals in each electroencephalogram signal satisfies the predetermined conditions. The biological information processing device according to claim 17 or 19.

22. The plurality of electrodes include the first electrode, The plurality of electroencephalogram signals include a first electroencephalogram signal associated with the first electrode, The aforementioned multiple artifact component signals are The first artifact component signal, which shows the first artifact originating from the living organism, It includes a second artifact component signal that shows a second artifact caused by factors other than living organisms, If the first effective value of the first artifact component signal associated with the first electroencephalogram signal is greater than a first threshold associated with the first effective value, and the second effective value of the second artifact component signal associated with the first electroencephalogram signal is greater than a second threshold associated with the second effective value, then information related to the second artifact mixed into the first electroencephalogram signal takes precedence over information related to the first artifact mixed into the first electroencephalogram signal. The biological information processing device according to claim 17 or 18.

23. Information related to the second artifact is visually presented, and after the second artifact is removed, information related to the first artifact is visually presented. The biological information processing device according to claim 22.

24. The biological information processing device according to any one of claims 17 to 19, wherein, under the predetermined conditions, a plurality of predetermined thresholds are set that correspond one-to-one with the effective value of each artifact component signal.

25. The aforementioned biological information processing device is Based on the effective values ​​of at least some of the multiple artifact component signals of each electroencephalogram signal, a plurality of signal quality indices are calculated, each representing the signal quality of one of the plurality of electroencephalogram signals. Based on the aforementioned multiple signal quality indices, a comprehensive signal quality index is determined that represents the overall signal quality of the multiple electroencephalogram signals. When the overall signal quality index is below a predetermined threshold, it is determined whether the effective value of each artifact component signal of each electroencephalogram signal satisfies a predetermined condition. A biological information processing device according to any one of claims 17 to 19.

26. The biological information processing device according to any one of claims 17 to 19, wherein the effective value of the plurality of artifact component signals of each electroencephalogram signal is RMS.

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