Determining flow speed based on photoacoustic imaging and sensing
AssigneeCity University of Hong Kong
InventorsLidai Wang, Chao Liu
Life of this patent
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Abstract
A method and a method for determining flow speed based on photoacoustic imaging or sensing. The method includes receiving multiple photoacoustic signals from a sample in response to transmission of multiple laser pulses of different wavelengths to the sample, and processing the photoacoustic signals based on a flow model that relates photoacoustic signals with flow speed to determine a flow speed of a liquid flow in the sample.
Claims40
A method for determining flow speed based on photoacoustic imaging or sensing, comprising:
- receiving a first photoacoustic signal and a second photoacoustic signal from a sample in response to transmission of a first laser pulse and a second laser pulse to the sample, the first pulse laser has a first wavelength and the second laser pulse has a second wavelength different from the first wavelength;
- and
- processing the first photoacoustic signal and the second photoacoustic signal based on a flow model that relates photoacoustic signals with flow speed to determine a flow speed of a liquid flow in the sample.
A system for determining flow speed based on photoacoustic imaging or sensing, comprising:
- one or more processors arranged to:
- receive a first photoacoustic signal and a second photoacoustic signal from a sample in response to transmission of a first laser pulse and a second laser pulse to the sample, the first pulse laser has a first wavelength and the second laser pulse has a second wavelength different from the first wavelength;
- and
- process the first photoacoustic signal and the second photoacoustic signal based on a flow model that relates photoacoustic signals with flow speed to determine a flow speed of a liquid flow in the sample.
A photoacoustic imaging or sensing apparatus comprising:
- a pulsed laser source;
- an optical processing unit operably connected with the pulsed laser source, the optical processing unit being arranged to process pulsed laser received from the pulsed laser source to provide laser pulses of different wavelengths;
- and
- a probe operably connected with the optical processing unit, for transmitting the laser pulses to a sample.
Dependencies are inferred from the claim text.