Simulation-based optimization of the acoustoelectric hydrophone for mapping an ultrasound beam

Zhaohui Wang, Pier Ingram, Ragnar Olafsson, Charles L. Greenlee, Robert A Norwood, Russell S Witte

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Citations (Scopus)

Abstract

Most single element hydrophones depend on a piezoelectric material that converts pressure changes to electricity. These devices, however, can be expensive, susceptible to damage at high pressure, and/or have limited bandwidth and sensitivity. The acousto-electric (AE) hydrophone is based on the AE effect, an interaction between electrical current and acoustic pressure generated when acoustic waves travel through a conducting material. As we have demonstrated previously, an AE hydrophone requires only a conductive material and can be constructed out of common laboratory supplies to generate images of an ultrasound beam pattern consistent with more expensive hydrophones. The sensitivity is controlled by the injected bias current, hydrophone shape, thickness and width. In this report we describe simulations aimed at optimizing the design of the AE hydrophone with experimental validation using new devices composed of a resistive element of indium tin oxide (ITO). Several shapes (e.g., bowtie and dumbbell) and resistivities were considered. The AE hydrophone with a dumbbell configuration achieved the best beam pattern of a 2.25MHz ultrasound transducer with lateral and axial resolutions consistent with images generated from a commercial hydrophone (Onda Inc.). The sensitivity of this device was ∼2 nV/Pa. Our simulations and experimental results both indicate that designs using a combination of ITO and gold (ratio of resistivities = ∼18) produce the best results. We hope that design optimization will lead to new devices for monitoring ultrasonic fields for biomedical imaging and therapy, including lithotripsy and focused ultrasound surgery.

Original languageEnglish (US)
Title of host publicationProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume7629
DOIs
StatePublished - 2010
EventMedical Imaging 2010 - Ultrasonic Imaging, Tomography, and Therapy - San Diego, CA, United States
Duration: Feb 14 2010Feb 15 2010

Other

OtherMedical Imaging 2010 - Ultrasonic Imaging, Tomography, and Therapy
CountryUnited States
CitySan Diego, CA
Period2/14/102/15/10

Fingerprint

Hydrophones
hydrophones
Ultrasonics
Equipment and Supplies
optimization
Pressure
simulation
Electricity
Lithotripsy
Tin oxides
Transducers
Acoustics
Gold
indium oxides
Indium
tin oxides
sensitivity
Conductive materials
electrical resistivity
Bias currents

Keywords

  • ablation therapy
  • Acousto-electric
  • current density distribution
  • hydrophone
  • mapping
  • relative resistivity
  • ultrasound
  • ultrasound detectors

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Radiology Nuclear Medicine and imaging

Cite this

Wang, Z., Ingram, P., Olafsson, R., Greenlee, C. L., Norwood, R. A., & Witte, R. S. (2010). Simulation-based optimization of the acoustoelectric hydrophone for mapping an ultrasound beam. In Progress in Biomedical Optics and Imaging - Proceedings of SPIE (Vol. 7629). [76290Q] https://doi.org/10.1117/12.844651

Simulation-based optimization of the acoustoelectric hydrophone for mapping an ultrasound beam. / Wang, Zhaohui; Ingram, Pier; Olafsson, Ragnar; Greenlee, Charles L.; Norwood, Robert A; Witte, Russell S.

Progress in Biomedical Optics and Imaging - Proceedings of SPIE. Vol. 7629 2010. 76290Q.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Wang, Z, Ingram, P, Olafsson, R, Greenlee, CL, Norwood, RA & Witte, RS 2010, Simulation-based optimization of the acoustoelectric hydrophone for mapping an ultrasound beam. in Progress in Biomedical Optics and Imaging - Proceedings of SPIE. vol. 7629, 76290Q, Medical Imaging 2010 - Ultrasonic Imaging, Tomography, and Therapy, San Diego, CA, United States, 2/14/10. https://doi.org/10.1117/12.844651
Wang Z, Ingram P, Olafsson R, Greenlee CL, Norwood RA, Witte RS. Simulation-based optimization of the acoustoelectric hydrophone for mapping an ultrasound beam. In Progress in Biomedical Optics and Imaging - Proceedings of SPIE. Vol. 7629. 2010. 76290Q https://doi.org/10.1117/12.844651
Wang, Zhaohui ; Ingram, Pier ; Olafsson, Ragnar ; Greenlee, Charles L. ; Norwood, Robert A ; Witte, Russell S. / Simulation-based optimization of the acoustoelectric hydrophone for mapping an ultrasound beam. Progress in Biomedical Optics and Imaging - Proceedings of SPIE. Vol. 7629 2010.
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