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Related Experiment Videos

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

R E Davidsen1, S W Smith

  • 1Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA.

Ultrasonic Imaging
|July 4, 1998
PubMed
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A novel multiplexed 2-D array transducer offers dual imaging modes. This advanced ultrasound technology improves B-mode imaging contrast by 28% for clearer diagnostic visualization.

Area of Science:

  • Ultrasound transducer technology
  • Medical imaging systems
  • Materials science in acoustics

Background:

  • Conventional ultrasound arrays face limitations in optimizing for both volumetric and B-mode imaging.
  • Developing a single transducer capable of high-performance in multiple imaging modalities is a significant challenge.
  • Sparse element patterns and multiplexing offer potential solutions for enhanced imaging capabilities.

Purpose of the Study:

  • To develop and evaluate a 2:1 multiplexed 2-D array transducer with adaptable element patterns for distinct imaging modes.
  • To enhance real-time volumetric imaging and improve B-mode imaging quality using a single device.
  • To investigate the performance of sparse element patterns and electrostrictive materials for advanced ultrasound applications.

Main Methods:

Related Experiment Videos

  • Designed a 2:1 multiplexed 2-D array with sparse element patterns for volumetric and B-mode imaging.
  • Utilized a small aperture for volumetric imaging (wide transmit beam) and a larger aperture for B-mode imaging (narrow transmit beam).
  • Fabricated the transducer using an electrostrictive material controlled by a DC bias field, achieving a 3.4 MHz center frequency and 46% bandwidth.

Main Results:

  • Simulations demonstrated improved cyst contrast by 28% using the alternate element pattern for B-mode imaging.
  • The electrostrictive material enabled a high element clamped capacitance (14.3 pF) and achieved high output off isolation (-35 dB transmit, -61 dB receive).
  • Real-time images of a cyst phantom showed enhanced contrast with the alternate aperture for B-mode imaging.

Conclusions:

  • The developed multiplexed 2-D array effectively supports both volumetric and B-mode imaging with optimized element patterns.
  • The use of an electrostrictive material and adaptable sparse patterns significantly improves B-mode contrast and overall imaging performance.
  • This technology represents a promising advancement for real-time ultrasound imaging systems, offering enhanced diagnostic capabilities.