Granted Patent B2

US 12,629,084 · App. 17/933,053 · Granted May 19, 2026

Inventors: Kazumi Suematsu (Tokorozawa, JP); Yusuke Kamikura (Tokorozawa, JP); Mari Yamada (Tokorozawa, JP); Ryota Masuda (Tokorozawa, JP)

Assignee: Nihon Kohden Corporation

A61B5/384A61B5/291A61B5/372G06F3/015

Abstract

Claims (50)

1 . An electroencephalogram signal processing apparatus comprising:

an interface configured to receive, from each of a plurality of electrodes configured to be attached to a head of a subject, an electroencephalogram signal corresponding to a change over time in a brain activity potential of the subject; and

one or more processors configured to:

obtain a value of an electroencephalogram parameter for each of the plurality of electrodes by processing the electroencephalogram signal; and

output data for plotting the value on a radar chart,

wherein a plurality of regions to each of which at least one electrode is attached are set in the head,

wherein each of a plurality of coordinate axes provided in the radar chart is associated with a corresponding one of the plurality of regions, and

wherein the plurality of coordinate axes provided in the radar chart are bilaterally symmetrical regarding the head of the subject, and

wherein the plotted value in the radar chart provides visualization of the brain activity of the subject in the corresponding one of the plurality of regions.

2 . The electroencephalogram signal processing apparatus according to claim 1 ,

wherein the plurality of regions are set symmetrically regarding the head.

3 . The electroencephalogram signal processing apparatus according to claim 1 ,

wherein the processor is configured to:

obtain the value of the electroencephalogram parameter at a plurality of time points; and

output data for plotting a change over time in the value on the radar chart.

4 . The electroencephalogram signal processing apparatus according to claim 3 ,

wherein the processor is configured to output data for plotting the value of the electroencephalogram parameter obtained at a time point closer to a current time point on the radar chart in a more emphasized manner by altering at least one of the output data's color, line thickness, line type, or shading.

5 . The electroencephalogram signal processing apparatus according to claim 1 , further comprising:

a storage configured to store data corresponding to the electroencephalogram signal,

wherein the processor is configured to:

read from the storage, when specification information specifying a specific region in the radar chart is received by the interface, data corresponding to the electroencephalogram signal used to obtain the value of the electroencephalogram parameter provided in the specific region; and

output data for visualizing the electroencephalogram signal.

6 . The electroencephalogram signal processing apparatus according to claim 5 ,

wherein the specific region corresponds to a specific time point at which the value of the electroencephalogram parameter is obtained.

7 . The electroencephalogram signal processing apparatus according to claim 5 ,

wherein the specific region corresponds to at least one of the plurality of regions set for the head.

8 . The electroencephalogram signal processing apparatus according to claim 1 , further comprising:

a storage configured to store a reference value corresponding to the value of the electroencephalogram parameter obtained based on the electroencephalogram signal of a healthy object,

wherein the processor is configured to output data for plotting the reference value on the radar chart.

9 . The electroencephalogram signal processing apparatus according to claim 1 ,

wherein the processor is configured to output a control signal that causes a notification apparatus to notify that the plurality of electroencephalogram parameter values are not normal.

10 . The electroencephalogram signal processing apparatus according to claim 9 , wherein the processor is further configured to determine that the plurality of electroencephalogram parameter values are not normal based on a comparison with a predetermined threshold range.

11 . The electroencephalogram signal processing apparatus according to claim 9 , wherein the processor is further configured to determine that the plurality of electroencephalogram parameter values are not normal based on a difference between a statistical value of a plurality of parameter values obtained for the left head side and a statistical value of a plurality of parameter values obtained for the right head side exceeds a threshold.

12 . The electroencephalogram signal processing apparatus according to claim 1 ,

wherein the processor is configured to obtain the value of the electroencephalogram parameter by performing frequency analysis processing on the electroencephalogram signal.

13 . A non-transitory computer-readable medium configured to store a computer program executable by one or more processors mounted on an electroencephalogram signal processing apparatus,

wherein the electroencephalogram signal processing apparatus executes:

receiving, from each of a plurality of electrodes configured to be attached to a head of a subject, an electroencephalogram signal corresponding to a change over time in a brain activity potential of the subject;

obtaining a value of an electroencephalogram parameter for each of the plurality of electrodes by processing the electroencephalogram signal; and

outputting data for plotting the value of the electroencephalogram parameter on a radar chart,

wherein a plurality of regions to each of which at least one electrode is attached are set in the head,

wherein each of a plurality of coordinate axes provided in the radar chart is associated with a corresponding one of the plurality of regions, wherein the plurality of coordinate axes provided in the radar chart are bilaterally symmetrical regarding the head of the subject, and

wherein the plotted value in the radar chart provides visualization of the brain activity of the subject in the corresponding one of the plurality of regions.

14 . An electroencephalogram signal processing system comprising:

a plurality of electrodes configured to be attached to a head of a subject;

a signal processing apparatus configured to obtain a value of an electroencephalogram parameter for each of the plurality of electrodes by processing an electroencephalogram signal corresponding to a change over time in a brain activity potential of the subject output from each of the plurality of electrodes; and

a visualization apparatus configured to visualize a radar chart in which the value of the electroencephalogram parameter is plotted,

wherein a plurality of regions to each of which at least one electrode is attached are set in the head,

wherein each of a plurality of coordinate axes provided in the radar chart is associated with a corresponding one of the plurality of regions wherein the plurality of coordinate axes provided in the radar chart are bilaterally symmetrical regarding the head of the subject, and

wherein the plotted value in the radar chart provides visualization of the brain activity of the subject in the corresponding one of the plurality of regions.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (42)