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Proceedings Paper

Development of a combined ultrasound and photoacoustic endoscopic probe
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Paper Abstract

For in vivo medical applications, endoscopy shows great potential for its minimally invasive manner, flexibility and close-up imaging characteristic. A miniaturized imaging probe combining ultrasound and photoacoustic endoscopy has been developed. The output of a 532-nm pulse laser was coupled into and delivered to the probe by a 200-micron-core multimode fiber. A 40 MHz ring shape ultrasound transducer was fabricated to receive pulse echo ultrasound and photoacoustic signals as well. The light-guiding optical fiber, the ring ultrasound transducer, and a mirror-based reflective material for the coaxial laser beam and ultrasound signal were integrated into the probe with a final packaged diameter of 2.5 mm. The performance of the probe was tested by imaging a graphite rod. The imaging ability of this dual-modality system was demonstrated by imaging the cross section of a rabbit aorta.

Paper Details

Date Published: 22 February 2011
PDF: 6 pages
Proc. SPIE 7893, Endoscopic Microscopy VI, 789317 (22 February 2011); doi: 10.1117/12.874505
Show Author Affiliations
Wei Wei, Univ. of California, Irvine (United States)
Xiang Li, The Univ. of Southern California (United States)
Qifa Zhou, The Univ. of Southern California (United States)
K. Kirk Shung, The Univ. of Southern California (United States)
Zhongping Chen, Univ. of California, Irvine (United States)

Published in SPIE Proceedings Vol. 7893:
Endoscopic Microscopy VI
Guillermo J. Tearney; Thomas D. Wang M.D., Editor(s)

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