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Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform
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Enhanced axial and lateral resolution using stabilized pulses.

Shujie Chen1, Kevin J Parker1

  • 1University of Rochester, Department of Electrical and Computer Engineering, Rochester, New York, United States.

Journal of Medical Imaging (Bellingham, Wash.)
|May 20, 2017
PubMed
Summary

This study enhances ultrasound imaging resolution by extending stable pulse deconvolution to two dimensions. Significant lateral and axial resolution improvements were observed in simulations and real-world imaging.

Keywords:
Z-transformdeconvolutionresolution enhancementstable inverse filterssuperresolutionultrasound images

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Area of Science:

  • Medical Imaging
  • Ultrasound Technology
  • Signal Processing

Background:

  • Ultrasound B-scan imaging faces inherent resolution limits.
  • Previous work utilized stable pulses for lateral deconvolution to improve resolution.
  • Extending deconvolution to two dimensions is crucial for further enhancement.

Purpose of the Study:

  • To extend the stable pulse deconvolution framework to achieve two-dimensional resolution enhancement in ultrasound imaging.
  • To model and perform deconvolution in the axial direction using in-phase quadrature data.
  • To validate the method using simulations, phantoms, and in vivo carotid artery imaging.

Main Methods:

  • Developed a two-dimensional deconvolution framework by extending stable pulse concepts to the axial direction.
  • Modeled the two-way axial response and performed deconvolution in the in-phase quadrature data domain.
  • Generated and applied stable inverse filters to ultrasound image data.

Main Results:

  • Achieved significant resolution enhancement in Field II simulations, tissue-mimicking phantoms, and in vivo carotid artery images.
  • Observed lateral resolution enhancement up to 8.75 times and axial resolution enhancement up to 20.5 times in simulations.
  • Demonstrated the effectiveness of the two-dimensional deconvolution approach for improving ultrasound image quality.

Conclusions:

  • The extended two-dimensional deconvolution framework effectively enhances lateral and axial resolution in ultrasound imaging.
  • Stable inverse filters are crucial for achieving significant resolution improvements.
  • This method holds promise for advancing ultrasound diagnostic capabilities.