Methods for depth estimation in laser speckle imaging
US9970955B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 2015 |
| Grant date | May 15, 2018 |
| Priority date | — |
| Expiry date | Jun 9, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/4815
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Systems and methods are provided for detecting the depth, flow rate, and other properties of regions of blood flow in biological tissue by illuminating the biological tissue with beams of coherent light and detecting responsively emitted light. This includes detecting lights emitted from the tissue having a plurality of respective different exposure times. The relationship between the intensity of the received light and the exposure times is determined and used to determine the depth, flow velocity, or other properties of regions of flow within the biological tissue. This can include determining a spatial and/or temporal contrast of the received light intensity. Determining the depth of a region of flow can include comparing determined properties of light received from the tissue at two different polarizations. Determining the depth of a region of flow can include comparing determined properties of light received from the tissue at two different locations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.