Dual-slope method for enhanced depth sensitivity in diffuse optical spectroscopy
US12263005B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 12, 2020 |
| Grant date | Apr 1, 2025 |
| Priority date | — |
| Expiry date | Jul 11, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S17/894
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An apparatus for earning out near-infrared spectroscopy using intensity-modulated near-infrared radiation or pulsed near-infrared radiation includes sources and detectors. For each source, there exists first and second distances. The first distance is a distance between the source and a first detector. The second distance is a distance between the source and the second detector. For each source, the difference between these two distances is the same. Additionally, wherein, for each source, the detector at a shorter distance is the same detector that is at a longer distance for the other source. A processor derives, from signals received by the detectors, a parameter indicative of two matched slopes. Tins parameter is either phase of the intensity-modulated near-infrared radiation or mean time-of-flight data for the pulsed near-infrared radiation. The processor then provides output data based on an average of the matched slopes. This promotes reduced sensitivity to superficial layers and enhanced sensitivity to deeper portions of a medium that is under investigation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.