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Two-dimensional arrays for medical ultrasound.

Publication ,  Journal Article
Smith, SW; Trahey, GE; von Ramm, OT
Published in: Ultrasonic imaging
July 1992

The design, fabrication and evaluation of two-dimensional transducer arrays are described for medical ultrasound imaging. A 4 x 32, 2.8 MHz array was developed to use new signal processing techniques for improved B-scan imaging including elevation focusing, phase correction and synthetic aperture imaging. Laboratory measurements from typical array elements showed 50 omega insertion loss of -56 dB, -6 dB fractional bandwidth of 43%, interelement crosstalk of -19 dB, and -6 dB pulse-echo angular response of 62 degrees. Simulations of pulse-echo beam plots have shown grating lobes 20 dB below the main lobe at +/- 7 degrees in the elevation direction. The complete 2-D array has been used for measurements of phase aberrations in breast, and the individual 32 element linear arrays have been used to obtain conventional B-scans. Several 16 x 16 arrays have also been developed for high speed volumetric imaging. These include 96 transmit elements and 32 receive channels. With a lambda/4 matching layer, laboratory measurements show 50 omega insertion loss of -72 dB, -6 dB fractional bandwidth of 63%, interelement crosstalk of -29 dB and -6 dB angular response of 25 degrees. Pulse-echo sensitivity was improved by 21 dB through the use of integrated circuit preamplifiers of high impedance mounted in the transducer handle. In vivo cardiac, abdominal, and obstetric B-scans with elevation focusing, as well as high speed C-scans, have been obtained with these 2-D arrays.

Duke Scholars

Published In

Ultrasonic imaging

DOI

EISSN

1096-0910

ISSN

0161-7346

Publication Date

July 1992

Volume

14

Issue

3

Start / End Page

213 / 233

Related Subject Headings

  • Ultrasonography
  • Transducers
  • Humans
  • Evaluation Studies as Topic
  • Equipment Design
  • Acoustics
  • 4003 Biomedical engineering
  • 0903 Biomedical Engineering
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Smith, S. W., Trahey, G. E., & von Ramm, O. T. (1992). Two-dimensional arrays for medical ultrasound. Ultrasonic Imaging, 14(3), 213–233. https://doi.org/10.1177/016173469201400301
Smith, S. W., G. E. Trahey, and O. T. von Ramm. “Two-dimensional arrays for medical ultrasound.Ultrasonic Imaging 14, no. 3 (July 1992): 213–33. https://doi.org/10.1177/016173469201400301.
Smith SW, Trahey GE, von Ramm OT. Two-dimensional arrays for medical ultrasound. Ultrasonic imaging. 1992 Jul;14(3):213–33.
Smith, S. W., et al. “Two-dimensional arrays for medical ultrasound.Ultrasonic Imaging, vol. 14, no. 3, July 1992, pp. 213–33. Epmc, doi:10.1177/016173469201400301.
Smith SW, Trahey GE, von Ramm OT. Two-dimensional arrays for medical ultrasound. Ultrasonic imaging. 1992 Jul;14(3):213–233.
Journal cover image

Published In

Ultrasonic imaging

DOI

EISSN

1096-0910

ISSN

0161-7346

Publication Date

July 1992

Volume

14

Issue

3

Start / End Page

213 / 233

Related Subject Headings

  • Ultrasonography
  • Transducers
  • Humans
  • Evaluation Studies as Topic
  • Equipment Design
  • Acoustics
  • 4003 Biomedical engineering
  • 0903 Biomedical Engineering