Patent ID: 11911130
Assignee: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 7:
8. The brain function measurement method according to claim 7, wherein the measurement device further includes a fourth probe having same configuration as the first probe, the second probe, and the third probe of the three probes, the fourth probe disposed at a fourth vertex of a second regular triangle of which one side is provided by one side of the first regular triangle, the method further comprising:
adjusting transmittance of an optical attenuator provided for the fourth probe so that a light amount detected in channels positioned at two sides of the second regular triangle newly formed by the disposition of the fourth probe becomes equal to a light amount detected in the three channels of the first rectangular triangle,
wherein the performing measurement is performed in a state in which the transmittance adjusted for the fourth probe is also maintained.