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Three-Dimensional Phase Resolved Functional Lung Magnetic Resonance Imaging
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Three-Dimensional Phase Resolved Functional Lung Magnetic Resonance Imaging.

Filip Klimeš1, Andreas Voskrebenzev2, Frank Wacker2

  • 1Institute of Diagnostic and Interventional Radiology, Hannover Medical School; Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), Member of the German Centre for Lung Research (DZL); klimes.filip@mh-hannover.de.

Journal of Visualized Experiments : Jove
|July 8, 2024
PubMed
Summary
This summary is machine-generated.

Three-dimensional phase-resolved functional lung (PREFUL) MRI assesses whole-lung ventilation dynamics. This radiation-free technique shows strong correlation with pulmonary function tests and offers a cost-effective alternative for patient-friendly lung evaluation.

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Area of Science:

  • Pulmonary Medicine
  • Radiology
  • Medical Imaging

Background:

  • Pulmonary MRI offers radiation-free lung ventilation assessment using various techniques.
  • Hyperpolarized gas MRI and Fourier decomposition (FD) MRI are key methods.
  • Recent advancements focus on improving FD MRI's resolution and whole-lung capabilities.

Purpose of the Study:

  • To introduce and evaluate the novel 3D PREFUL MRI technique for dynamic, whole-lung ventilation assessment.
  • To compare the performance of 3D PREFUL with existing methods and pulmonary function tests.
  • To assess the repeatability and clinical utility of 3D PREFUL for pulmonary ventilation evaluation.

Main Methods:

  • Developed a 3D PREFUL MRI acquisition using a stack-of-stars spoiled-gradient-echo sequence with golden angle increment.
  • Employed compressed sensing for image reconstruction across approximately 40 breathing phases.
  • Registered respiratory-resolved images and extracted ventilation parameters for analysis.

Main Results:

  • 3D PREFUL demonstrated strong correlations between its ventilation parameters and pulmonary function test measurements in healthy volunteers and COPD patients.
  • The technique achieved acceptable interscan repeatability, indicating reliability for repeated assessments.
  • 3D PREFUL provides whole-lung coverage with enhanced spatial resolution compared to 2D PREFUL.

Conclusions:

  • 3D PREFUL MRI is a promising, radiation-free technique for comprehensive pulmonary ventilation assessment.
  • It offers a cost-effective and patient-friendly alternative to hyperpolarized 129Xe MRI.
  • This advancement enables detailed evaluation of dynamic ventilation across the entire lung.