Vibro-acoustography beamforming and imaging with a 1.75D array transducer

Matthew W Urban, Carl Chalek, Kai E. Thomenius, Mostafa Fatemi, Azra Alizad

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

Abstract

Vibro-acoustography (VA) is an ultrasound-based imaging modality that uses radiation force produced by two confocal ultrasound beams separated by small frequency difference, Δf, to vibrate tissue at Δf. We used a 1.75D transducer with 12 rows and 70 columns of elements with size 0.9 x 0.9 mm. The point-spread functions (PSFs) for different configurations of the subapertures for the two frequencies centered about 5 MHz were evaluated using a numerical simulation model using Field II. Experimentally, we scanned the pressure field for different configurations using a needle hydrophone to evaluate the PSF. Finally, we scanned a urethane breast phantom and an ex vivo human prostate. We evaluated the PSFs from the simulations and needle hydrophone scans and found good agreement. We quantitatively analyzed the grating lobe levels of the PSFs for the different configurations. We compared images generated using different configurations of the subapertures in the urethane breast phantom and ex vivo human prostate. The advantage of the 1.75D array transducer is the multiple rows of elements that can be used for improving elevation focus for imaging formation. VA imaging using a 1.75D array transducer provides improved image detail and contrast due to better elevation focusing of the imaging PSF.

Original languageEnglish (US)
Title of host publicationIEEE International Ultrasonics Symposium, IUS
Pages672-675
Number of pages4
DOIs
StatePublished - 2011
Event2011 IEEE International Ultrasonics Symposium, IUS 2011 - Orlando, FL, United States
Duration: Oct 18 2011Oct 21 2011

Other

Other2011 IEEE International Ultrasonics Symposium, IUS 2011
CountryUnited States
CityOrlando, FL
Period10/18/1110/21/11

Fingerprint

beamforming
point spread functions
transducers
urethanes
hydrophones
configurations
needles
breast
pressure distribution
lobes
simulation
gratings
radiation

Keywords

  • 1.75D array
  • beamforming
  • vibro-acoustography

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

Cite this

Urban, M. W., Chalek, C., Thomenius, K. E., Fatemi, M., & Alizad, A. (2011). Vibro-acoustography beamforming and imaging with a 1.75D array transducer. In IEEE International Ultrasonics Symposium, IUS (pp. 672-675). [6293280] https://doi.org/10.1109/ULTSYM.2011.0163

Vibro-acoustography beamforming and imaging with a 1.75D array transducer. / Urban, Matthew W; Chalek, Carl; Thomenius, Kai E.; Fatemi, Mostafa; Alizad, Azra.

IEEE International Ultrasonics Symposium, IUS. 2011. p. 672-675 6293280.

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

Urban, MW, Chalek, C, Thomenius, KE, Fatemi, M & Alizad, A 2011, Vibro-acoustography beamforming and imaging with a 1.75D array transducer. in IEEE International Ultrasonics Symposium, IUS., 6293280, pp. 672-675, 2011 IEEE International Ultrasonics Symposium, IUS 2011, Orlando, FL, United States, 10/18/11. https://doi.org/10.1109/ULTSYM.2011.0163
Urban MW, Chalek C, Thomenius KE, Fatemi M, Alizad A. Vibro-acoustography beamforming and imaging with a 1.75D array transducer. In IEEE International Ultrasonics Symposium, IUS. 2011. p. 672-675. 6293280 https://doi.org/10.1109/ULTSYM.2011.0163
Urban, Matthew W ; Chalek, Carl ; Thomenius, Kai E. ; Fatemi, Mostafa ; Alizad, Azra. / Vibro-acoustography beamforming and imaging with a 1.75D array transducer. IEEE International Ultrasonics Symposium, IUS. 2011. pp. 672-675
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