Optoacoustic imaging is an imaging technique which relies on absorption of pulsed laser light by an absorbing object within a tissue to create pressure waves that are detected at the tissue surface.
- A tissue is exposed to a pulsed laser whose photons propagate to the object and are absorbed.
- Such absorption causes energy deposition to yield a slight increase in temperature.
- Such a temperature rise yields a slight expansion of the object.
- Such thermoelastic expansion increases the pressure within the object and launches a pressure wave into the surrounding medium.
- Such a pressure wave propagates to the tissue surface where an acoustic transducer detects the pressure yielding a time-resolved measurement.
- Such a time-resolved pressure is integrated versus time to yield the time-resolved velocity potential.
- Such a velocity potential is backprojected into the tissue to reconstruct the initial distribution of energy deposition.
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