Photoacoustic imaging method

Details Photoacoustic imaging method Photoacoustic imaging method

1989-09-19

1991-12-10

Williams, Hezron E.

Measuring and testing

Vibration

By mechanical waves

73606, 73643, G01N 924

Patent

active

050707337

ABSTRACT:
A photoacoustic imaging method comprises the steps of using modulated light of two different modulation frequencies to illuminate an object to be observed, so that an image of only a region of a specified depth within the object is obtained based on the difference between two photoacoustic signals separately detected by an acoustic sensor.

REFERENCES:
patent: 4255971 (1981-03-01), Rosencwaig
patent: 4484820 (1984-11-01), Rosencwaig
patent: 4513384 (1985-04-01), Rosencwaig
patent: 4518992 (1985-05-01), Kessler et al.

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