Transducer frequency response and impact on TPOAT signal

Deepti Pachauri; Timothy A. Stiles; Namrta Purwar; Prasenjit Dey; S. K. Patch

doi:10.1117/12.763047

28 February 2008 Transducer frequency response and impact on TPOAT signal

Deepti Pachauri, Timothy A. Stiles, Namrta Purwar, Prasenjit Dey, S. K. Patch

Proceedings Volume 6856, Photons Plus Ultrasound: Imaging and Sensing 2008: The Ninth Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics; 68561H (2008) https://doi.org/10.1117/12.763047
Event: SPIE BiOS, 2008, San Jose, California, United States

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.

Citation Download Citation

Deepti Pachauri, Timothy A. Stiles, Namrta Purwar, Prasenjit Dey, and S. K. Patch "Transducer frequency response and impact on TPOAT signal", Proc. SPIE 6856, Photons Plus Ultrasound: Imaging and Sensing 2008: The Ninth Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics, 68561H (28 February 2008); https://doi.org/10.1117/12.763047

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