Laser-induced ultrasound transmitters for large-volume ultrasound tomography

D. Thompson*, J.R. Nagel, D. B. Gasteau, S. Manohar

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

1 Citation (Scopus)
22 Downloads (Pure)

Abstract

We present a protocol for the design, fabrication and characterisation of laser-induced ultrasound transmitters with a specific, user-defined frequency response for the purpose of ultrasound tomography of large-volume biomedical samples. Using an analytic solution to the photoacoustic equation and measurements of the optical and acoustic properties of the materials used in the transmitters, we arrive at a required mixture of carbon black and polydimethylsiloxane to achieve the desired frequency response. After an in-depth explanation of the fabrication and characterisation approaches we show the performance of the fabricated transmitter, which has a centre frequency of 0.9 MHz, 200% bandwidth and 45.8 opening angle, multi-kPa pressures over a large depth range in water.

Original languageEnglish
Article number100312
JournalPhotoacoustics
Volume25
Early online date10 Nov 2021
DOIs
Publication statusPublished - Mar 2022

Keywords

  • Environmental applications of photoacoustics/laser ultrasound
  • Industrial
  • NDE
  • New transducers
  • UT-Hybrid-D

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