Monitoring constituents of an animal organ using discrete radiation
US6195574A · kind A · utility
25Cited by
3References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 28, 1999 |
| Grant date | Feb 27, 2001 |
| Priority date | — |
| Expiry date | Aug 28, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/14553
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Constituents such as oxy- and deoxy-hemoglobin are monitored non-invasively in an animal organ such as a brain with a spectrometric instrument by passing radiation through the organ. An input beam has a plurality of discrete wavelengths modulated with radio frequency. Output radiation is received by a detector from which output amplitude and output phase are determined for each wavelength. Absorption coefficient is computed from the amplitude and phase, and concentrations of constituents are thereby calculated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.