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Multi-oriented windowed harmonic phase reconstruction for robust cardiac strain imaging.

Lucilio Cordero-Grande1, Javier Royuela-del-Val2, Santiago Sanz-Estébanez2

  • 1Laboratorio de Procesado de Imagen, Department of Teoría de la Señal y Comunicaciones e Ingeniería Telemática, ETSIT, Universidad de Valladolid, Campus Miguel Delibes s.n., 40011, Valladolid, Spain; Centre for the Developing Brain and Department of Biomedical Engineering, Division of Imaging Sciences and Biomedical Engineering, King's College London, St Thomas' Hospital, SE1 7EH, London, UK.

Medical Image Analysis
|January 9, 2016
PubMed
Summary
This summary is machine-generated.

This study enhances cardiac strain tensor estimation using harmonic phase imaging. Improved methods offer more accurate and reproducible measurements of heart motion from tagged MRI.

Keywords:
ArtifactsHarmonic phase reconstructionStrain tensorTagged magnetic resonance imagingWindowed Fourier transform

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Area of Science:

  • Medical Imaging
  • Biomedical Engineering
  • Cardiovascular Research

Background:

  • Accurate measurement of cardiac strain is crucial for diagnosing heart conditions.
  • Existing methods for cardiac strain tensor estimation have limitations in precision and robustness.
  • Tagged magnetic resonance imaging (tagging MRI) is a key technique for assessing myocardial motion.

Purpose of the Study:

  • To develop an advanced method for direct cardiac strain tensor estimation.
  • To improve the precision and robustness of strain measurements using tagged MRI.
  • To extend the harmonic phase (HARP) reconstruction technique.

Main Methods:

  • Utilized windowed Fourier transform for local phase reconstruction.
  • Acquired an overdetermined set of stripe orientations to minimize artifacts.
  • Extended the harmonic phase (HARP) method for enhanced image analysis.

Main Results:

  • Increased acquired orientations significantly improved strain measurement reproducibility.
  • Extended orientation sets outperformed repeated sampling from smaller sets.
  • The proposed method substantially reduced biases in local phase estimation compared to the original HARP formulation.

Conclusions:

  • The developed method offers more precise and robust cardiac strain tensor estimation.
  • Acquisition of an extended set of stripe orientations is key for improved accuracy.
  • This approach enables the design of advanced motion-sensitive MRI techniques for better cardiac motion analysis.