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Related Experiment Videos

Speckle reduction in pulse-echo ultrasonic imaging using a two-dimensional receiving array.

J J Giesey1, P L Carson, D W Fitting

  • 1Dept. of Electr. Eng., Ohio Univ., Athens, OH.

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
|January 1, 1992
PubMed
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This study developed an experimental pulse-echo imager to reduce speckle in ultrasonic images. The system achieved a fourfold decrease in speckle noise, significantly improving image quality while maintaining resolution.

Area of Science:

  • Medical Imaging
  • Ultrasound Technology

Background:

  • Speckle noise is a significant artifact in ultrasonic images.
  • Reducing speckle is crucial for enhancing diagnostic accuracy.

Purpose of the Study:

  • To develop and evaluate an experimental pulse-echo imager for speckle reduction.
  • To assess the impact of subaperture compounding on image quality and resolution.

Main Methods:

  • Utilized a 64-element spherically focused segmented annuli array receiver with a common transmitter.
  • Formed compounded images using subapertures of varying size, shape, and overlap.
  • Evaluated resolution, point spread function, sensitivity, and resolution cell size using a pointlike scatterer.

Main Results:

Related Experiment Videos

  • Incoherent summation of signals from small element groups decreased speckle noise by a factor of four.
  • Lateral resolution and resolution cell size increased gradually with decreasing subaperture size.
  • Image quality, measured by CSR/d, improved by a factor of almost two without significant loss of system sensitivity.

    • Conclusions:

    • The developed pulse-echo imager effectively reduces speckle noise in ultrasonic images.
    • Subaperture compounding offers a viable strategy for enhancing ultrasonic image quality.
    • The system demonstrates potential for improved diagnostic imaging in ultrasound applications.