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Published February 17, 2011 | Published
Book Section - Chapter Open

Volumetric photoacoustic endoscopy of upper gastrointestinal tract: ultrasonic transducer technology development


We have successfully implemented a focused ultrasonic transducer for photoacoustic endoscopy. The photoacoustic endoscopic probe's ultrasound transducer determines the lateral resolution of the system. By using a focused ultrasonic transducer, we significantly improved the endoscope's spatial resolution and signal-to-noise ratio. This paper describes the technical details of the ultrasonic transducer incorporated into the photoacoustic endoscopic probe and the experimental results from which the transducer's resolution is quantified and the image improvement is validated.

Additional Information

© 2011 Society of Photo-Optical Instrumentation Engineers (SPIE). This work was sponsored in part by National Institutes of Health grants R01 CA157277, R01 NS46214 (BRP), R01 EB000712, R01 EB008085, and U54 CA136398 (Network for Translational Research). L.W. has a financial interest in Microphotoacoustics, Inc. and Endra, Inc., which, however, did not support this work. J.-M.Y. was supported in part by a Korea Research Foundation Grant funded by the Korean Government (KRF-2007-357-C00039).

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