Measuring arrangement for tissue-optical examination of a subject with visible, NIR or IR light
US5293873A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 26, 1992 |
| Grant date | Mar 15, 1994 |
| Priority date | — |
| Expiry date | Aug 26, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/02475
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus and method for optically analyzing tissue in a subject directs coherent light and ultrasound at the subject along parallel propagation paths. The ultrasound causes a Doppler shift in the light emerging from the subject, this shift being related to certain tissue characteristics. The light emerging from the subject is detected and a corresponding signal is supplied to an evaluation stage which absolutely or relatively calculates the intensity of those parts of the detected light which proceeded through tissue not charged by ultrasound and those parts of the detected light which proceeded through tissue charged by ultrasound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.