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公开(公告)号：US10939851B2
公开(公告)日：2021-03-09
申请号：US15551102
申请日：2016-02-10
Inventor： Toru Yamada , Shinji Umeyama
IPC: A61B5/1455 , A61B10/00 , A61B5/00
Abstract: Provided is a multi-channel brain-functional near infrared spectroscopy device capable of easily levelling detector noise. The following control is performed: setting transmittances of all of optical attenuators to 1, setting intensities of all of light sources to a maximum light intensity within a safe irradiation range; determining the effective illumination intensity of each light source probe i as well as a minimum effective illumination intensity and a maximum effective illumination intensity thereof; changing the transmittance ai of each optical attenuator i on the light source probe side to [the minimum effective illumination intensity/effective illumination intensity of each light source probe i], thereby levelling the effective illumination intensity; and increasing the intensities of all of the light sources by W=[the maximum effective illumination intensity/the minimum effective incident efficiency] times, and determining the effective detection rate of each detector probe j as well as the minimum effective detection rate thereof; and performing control so as to level the effective detection rate by changing the transmittance aj of each optical attenuator j on the detector probe side to [the minimum effective detection rate/effective detection rate of each detector probe j], thereby equalizing detector noise among all the channels k.
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公开(公告)号：US20190380634A1
公开(公告)日：2019-12-19
申请号：US15542193
申请日：2015-09-17
Inventor： Toru Yamada
IPC: A61B5/1455 , A61B5/00
Abstract: Provided is a brain function measurement device capable of improving the reliability of brain function measurement using a simple configuration. The brain function measurement device includes light source probes LD2 and LD12 for irradiating the scalp of a test subject with light beams; linearly polarizing films P2 and P3 for polarizing the light beams emitted from the light source probes LD2 and LD12 in a first direction; a linearly polarizing film P1 for blocking components in the first direction of reflected light beams that are generated as the light beams emitted from the linearly polarizing film P2 and P3 are reflected by the hairs of the test subject; and a detection probe PD1 for detecting the intensity of a light beam that has passed through the linearly polarizing film P1.
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Patent Agency Ranking
公开(公告)号：US11478149B2
公开(公告)日：2022-10-25
申请号：US16603756
申请日：2018-03-28
Inventor： Toru Yamada
IPC: A61B5/00
Abstract: Brain function measurement device including: first light-irradiation probe to irradiate a brain of a subject with light; first light-detection probe to detect light reflected by the brain among the light from the first light-irradiation probe; second light-irradiation probe to irradiate the brain with light; second light-detection probe to detect light reflected by the brain among the light from the second light-irradiation probe; and control unit configured to adjust a light amount irradiated by the second light-irradiation probe so that the light amount measured with respect to a channel between the first light-detection and the second light-irradiation probes becomes an observation value with respect to a channel between the first light-irradiation and the first light-detection probes, and to adjust a light amount detected by the second light-detection probe so that the light amount measured with respect to a channel between the second light-irradiation and the second light-detection probes becomes the observation value.
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公开(公告)号：US20210145286A1
公开(公告)日：2021-05-20
申请号：US17256081
申请日：2019-12-20
Inventor： Toru Yamada
IPC: A61B5/00
Abstract: The problem is to level a plurality of data items obtained by functional near-infrared spectroscopy at different measurement locations into data having a best S/N ratio in a simple manner. In order to solve the problem, provided is a device 1 comprising a measuring unit 6 in which probes PR1 to PR3 for emitting or detecting light and having optical attenuators 13 are disposed at points forming a regular triangle, and a control unit 2 which: sets the transmittances of all of the optical attenuators 13 so that the amount of emitted light of the probes becomes a desired value; identifies, among three channels to be measured, a first channel having a maximum detected light amount; performs the detection in second and third channels positioned between first and second probes at both ends of the first channel and a third probe; adjusts the transmittance of the optical attenuator 13 of the first or the second probe disposed at one end of the channel having a smaller detected light amount so that the light amounts detected in the second and the third channels become equal; adjusts the transmittance of the optical attenuator 13 of the third probe so that the detected light amount of the second or the third channel becomes equal to the detected light amount of the first channel; and performs the measurement with all of the transmittances after the adjustments maintained.
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公开(公告)号：US11096609B2
公开(公告)日：2021-08-24
申请号：US15542193
申请日：2015-09-17
Inventor： Toru Yamada
IPC: A61B5/1455 , A61B5/00 , G01B9/02 , G01N21/359
Abstract: Provided is a brain function measurement device capable of improving the reliability of brain function measurement using a simple configuration. The brain function measurement device includes light source probes LD2 and LD12 for irradiating the scalp of a test subject with light beams; linearly polarizing films P2 and P3 for polarizing the light beams emitted from the light source probes LD2 and LD12 in a first direction; a linearly polarizing film P1 for blocking components in the first direction of reflected light beams that are generated as the light beams emitted from the linearly polarizing film P2 and P3 are reflected by the hairs of the test subject; and a detection probe PD1 for detecting the intensity of a light beam that has passed through the linearly polarizing film P1.
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公开(公告)号：US11963794B2
公开(公告)日：2024-04-23
申请号：US17256412
申请日：2019-12-20
Inventor： Toru Yamada
IPC: A61B5/00
CPC classification number: A61B5/6835 , A61B5/0082 , A61B5/6814
Abstract: The problem is to provide a probe holder for fixing, using a simple configuration, a plurality of probes in a state in which the positional relationships of the probes are defined. To solve the problem, provided is a probe holder for holding probes for emitting or detecting light and attaching the probes to the head of a subject, the probe holder including: a plurality of basic units each holding three of the probes with a single plate; and a plurality of couplers each linking a respective one of the three of the probes and adjacent probes to form a plurality of adjacent probes that are linked at a point equidistant from the plurality of adjacent probes, each probe in the plurality of adjacent probes being included in a different one of the plurality of basic units.
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公开(公告)号：US11911130B2
公开(公告)日：2024-02-27
申请号：US17256081
申请日：2019-12-20
Inventor： Toru Yamada
IPC: A61B5/00
CPC classification number: A61B5/0075 , A61B5/4064 , A61B2562/0233 , A61B2562/223
Abstract: A device including a measuring unit having probes for emitting or detecting light with optical attenuators at points forming a regular triangle, and a control unit to: set transmittances of the attenuators so that an amount of light from the probes becomes a desired value; identify, among three channels, a first channel having a maximum light amount; perform detection in second and third channels between first and second probes of the first channel and a third probe; adjust transmittance of the attenuator of the first or the second probe of the channel having a smaller light amount so that light amounts in the second and the third channels become equal; adjust transmittance of the attenuator of the third probe so that the light amount of the second or the third channel becomes equal to the light amount of the first channel; and perform measurement with all transmittances after adjustments maintained.
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