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Proceedings Paper

Transducer frequency response and impact on TPOAT signal
Author(s): Deepti Pachauri; Timothy A. Stiles; Namrta Purwar; Prasenjit Dey; S. K. Patch
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Paper Abstract

Ideal transducers have perfectly uniform response to incoming pressure waves, regardless of frequency. In practice, piezoelectric transducers are designed with a particular center frequency (CF) and are most sensitive to signals with strong frequency content near CF, bandpass filtering signal - and reconstructed images. We characterized the frequency dependent receive sensitivity of three single-element transducers with CFs ranging from 1 to 3.5 MHz. The resulting sensitivity response curves are applied to ideal thermo/photo/opto-acoustic (TPOAT) signals generated by ideal spherical absorbers to show the impact of transducer frequency response on measured TPOAT data and reconstructed images.

Paper Details

Date Published: 28 February 2008
PDF: 7 pages
Proc. SPIE 6856, Photons Plus Ultrasound: Imaging and Sensing 2008: The Ninth Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics, 68561H (28 February 2008); doi: 10.1117/12.763047
Show Author Affiliations
Deepti Pachauri, Univ. of Wisconsin, Milwaukee (United States)
Timothy A. Stiles, Univ. of Wisconsin, Madison (United States)
Namrta Purwar, Univ. of Wisconsin, Milwaukee (United States)
Prasenjit Dey, Univ. of Wisconsin, Milwaukee (United States)
S. K. Patch, Univ. of Wisconsin, Milwaukee (United States)


Published in SPIE Proceedings Vol. 6856:
Photons Plus Ultrasound: Imaging and Sensing 2008: The Ninth Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics
Alexander A. Oraevsky; Lihong V. Wang, Editor(s)

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