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Related Experiment Videos

Strain rate imaging using two-dimensional speckle tracking.

K Kaluzynski1, X Chen, S Y Emelianov

  • 1Institute for Precision and Biomedical Engineering, Warsaw University of Technology, 02-525 Warsaw, Poland.

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
|August 2, 2001
PubMed
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New strain rate imaging (SRI) using 2D phase-sensitive speckle tracking accurately identifies non-contracting heart regions. This advanced ultrasound technique overcomes limitations of traditional methods, improving cardiac mechanics assessment.

Area of Science:

  • Cardiovascular imaging
  • Biomedical engineering
  • Ultrasound technology

Background:

  • Strain rate imaging (SRI) aids in identifying non-contracting myocardium.
  • Traditional methods using Doppler-based tissue velocity signals have limitations.
  • High frame rate cardiac imaging is crucial for accurate mechanical assessment.

Purpose of the Study:

  • To propose and validate an alternate method for strain rate imaging (SRI).
  • To utilize 2D phase-sensitive speckle tracking for high-resolution strain magnitude derivative maps.
  • To compare the proposed SRI method with traditional tissue velocity imaging (TVI).

Main Methods:

  • Developed a 2D phase-sensitive speckle tracking algorithm for real-time ultrasound.
  • Captured very high frame rate ultrasound images of a cardiac phantom.

Related Experiment Videos

  • Simulated and measured strain rate images (SRI) using the developed method and compared with TVI.

    • Main Results:

    • Simulations demonstrated SRI spatial resolution of 1-2 mm at 5 MHz.
    • The proposed SRI method is virtually free of angle-dependent artifacts.
    • Identified low deformation regions in phantom models that were obscured by TVI-based SRI.

    Conclusions:

    • 2D phase-sensitive speckle tracking offers a superior method for generating strain rate images.
    • This technique provides a more complete description of cardiac mechanics.
    • The method effectively visualizes subtle regional myocardial dysfunction.