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A two-dimensional array for B-mode and volumetric imaging with multiplexed electrostrictive elements.

Publication ,  Journal Article
Davidsen, RE; Smith, SW
Published in: Ultrasonic imaging
October 1997

A 2:1 multiplexed 2-D array has been developed that has a sparse element pattern designed for real time volumetric imaging and an alternate element pattern designed for B-mode imaging. For volumetric imaging, a small aperture was used to provide a wide transmit beam, allowing multiple beams to be received simultaneously. For B-mode imaging, a larger aperture with a more narrow transmit beam was used to improve image quality. Sparse random element patterns were evaluated by beamplot and cyst image simulations. Using the alternate element pattern for B-mode imaging, simulated cyst contrast was improved by 28%. The multiplexed transducer was fabricated using an electrostrictive material in which array elements were activated and deactivated by a dc bias field. The transducer had a 3.4 MHz center frequency with 46% bandwidth, which was consistent with KLM simulations. The high dielectric constant of the electrostrictive material resulted in an element clamped capacitance of 14.3 pF versus 2 pF for a convention PZT element. An output off isolation of -35 dB was measured for transmit and -61 dB for receive. The array was integrated with the volumetric scanner and used to make real time images of a cyst phantom. The images showed improved cyst contrast using the alternate aperture for B-mode imaging.

Duke Scholars

Published In

Ultrasonic imaging

DOI

EISSN

1096-0910

ISSN

0161-7346

Publication Date

October 1997

Volume

19

Issue

4

Start / End Page

235 / 250

Related Subject Headings

  • Ultrasonography
  • Transducers
  • Phantoms, Imaging
  • Image Processing, Computer-Assisted
  • Acoustics
  • 4003 Biomedical engineering
  • 0903 Biomedical Engineering
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Davidsen, R. E., & Smith, S. W. (1997). A two-dimensional array for B-mode and volumetric imaging with multiplexed electrostrictive elements. Ultrasonic Imaging, 19(4), 235–250. https://doi.org/10.1177/016173469701900401
Davidsen, R. E., and S. W. Smith. “A two-dimensional array for B-mode and volumetric imaging with multiplexed electrostrictive elements.Ultrasonic Imaging 19, no. 4 (October 1997): 235–50. https://doi.org/10.1177/016173469701900401.
Davidsen RE, Smith SW. A two-dimensional array for B-mode and volumetric imaging with multiplexed electrostrictive elements. Ultrasonic imaging. 1997 Oct;19(4):235–50.
Davidsen, R. E., and S. W. Smith. “A two-dimensional array for B-mode and volumetric imaging with multiplexed electrostrictive elements.Ultrasonic Imaging, vol. 19, no. 4, Oct. 1997, pp. 235–50. Epmc, doi:10.1177/016173469701900401.
Davidsen RE, Smith SW. A two-dimensional array for B-mode and volumetric imaging with multiplexed electrostrictive elements. Ultrasonic imaging. 1997 Oct;19(4):235–250.
Journal cover image

Published In

Ultrasonic imaging

DOI

EISSN

1096-0910

ISSN

0161-7346

Publication Date

October 1997

Volume

19

Issue

4

Start / End Page

235 / 250

Related Subject Headings

  • Ultrasonography
  • Transducers
  • Phantoms, Imaging
  • Image Processing, Computer-Assisted
  • Acoustics
  • 4003 Biomedical engineering
  • 0903 Biomedical Engineering