Biological optical measurement system
US7565192B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 17, 2005 |
| Grant date | Jul 21, 2009 |
| Priority date | — |
| Expiry date | Dec 30, 2026 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/14553
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A typical task assigned for measuring a brain activity signal lasts from 10 to 30 seconds. The frequency band of the Mayer wave noise signal is very close to the frequency bands of brain activity signals, a result, it is difficult to reduce the Mayer wave noise signal using a bandpass filter or a bandcut filter. Light irradiating units and light detecting units for detecting the emitted light that has been passed through or reflected within the tissue are provided. A biological signal measuring unit measures at least one of the pulsation, breathing, blood pressure, and temperature. The relationship between an optical signal obtained by the light detecting unit and a biological signal using non-linear analysis; and a computation for separating the biological noise signal from the optical signal on the basis of the obtained relationship.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.