TITLE

High-resolution photoacoustic imaging with focused laser and ultrasonic beams

AUTHOR(S)
Kong, Fanting; Chen, Y. C.; Lloyd, Harriet O.; Silverman, Ronald H.; Kim, Hyung Ham; Cannata, Jonathan M.; Shung, K. Kirk
PUB. DATE
January 2009
SOURCE
Applied Physics Letters;1/19/2009, Vol. 94 Issue 3, pN.PAG
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We report a photoacoustic imager that utilizes a focused laser beam in combination with a 20 MHz ultrasound focusing transducer to obtain micron-resolution tissue images over a long working distance. The imager is based on a ring transducer that combines ultrasonic and laser beams collinearly and confocally in a monolithic element. The combination of focused laser beam and short pulse irradiation led to significant improvement in lateral and axial resolutions compared to the pulse-echo ultrasonic imaging technique or photoacoustic imaging with an unfocused laser. Potential applications include clinical examination of the eye and characterization of thin and superficial tissues.
ACCESSION #
36339289

 

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