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Phase coherence imaging.

Jorge Camacho1, Montserrat Parrilla, Carlos Fritsch

  • 1Instituto de Automática Industrial (CSIC), Departamento de Sistemas, La poveda, Arganda del Rey, Madrid, Spain.

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
|May 29, 2009
PubMed
Summary
This summary is machine-generated.

This study introduces a novel ultrasound imaging method using phase analysis to suppress grating and side lobes. The technique enhances image resolution and signal-to-noise ratio (SNR) by weighting coherent sums with coherence factors.

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Area of Science:

  • Medical Imaging
  • Ultrasound Technology
  • Signal Processing

Background:

  • Grating and side lobes degrade ultrasound image quality.
  • Existing methods often rely on amplitude information for correction.
  • Phase information in aperture data offers potential for improved image processing.

Purpose of the Study:

  • To develop a new method for suppressing grating and side lobes in ultrasound images.
  • To improve lateral resolution and signal-to-noise ratio (SNR).
  • To utilize phase diversity for image correction.

Main Methods:

  • Analysis of phase diversity in aperture data.
  • Introduction of phase coherence factor (PCF) and sign coherence factor (SCF) for weighting coherent sum output.
  • Utilizing phase information, not amplitude, for correction.

Main Results:

  • Successful suppression of grating and side lobes.
  • Demonstrated improvements in lateral resolution and SNR.
  • SCF technique is real-time, straightforward, and enhances resolution, contrast, SNR, and dynamic range.

Conclusions:

  • The proposed phase-based method effectively suppresses grating and side lobes in ultrasound imaging.
  • The technique offers significant improvements in image quality metrics.
  • The SCF method is a versatile addition to existing beamformers for real-time enhancement.