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Related Experiment Video

Updated: Jul 2, 2025

Author Spotlight: Standardization and Best Practices for Advancing Lung Imaging Using 129Xe MRI
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Toward Lung Ventilation Imaging Using Hyperpolarized Diethyl Ether Gas Contrast Agent.

Nuwandi M Ariyasingha1, Md Raduanul H Chowdhury1, Anna Samoilenko1

  • 1Department of Chemistry, Karmanos Cancer Institute (KCI), Department of Pediatrics, Wayne State University, Detroit, MI-48202, USA.

Chemistry (Weinheim an Der Bergstrasse, Germany)
|February 21, 2024
PubMed
Summary

Researchers developed a new method to create proton-hyperpolarized diethyl ether gas for lung MRI. This cost-effective approach enables pulmonary imaging on standard clinical MRI scanners, overcoming previous limitations.

Keywords:
PHIPdiethyl etherheterogeneous catalysishyperpolarizationlung MRIparahydrogen

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Area of Science:

  • Medical Imaging
  • Magnetic Resonance Imaging
  • Pulmonary Medicine

Background:

  • FDA-approved hyperpolarized 129Xe gas is a successful pulmonary MRI contrast agent.
  • Clinical translation is hindered by high equipment costs and incompatibility with standard MRI scanners.
  • Existing clinical MRI scanners are designed for proton (1H) imaging, not 129Xe.

Purpose of the Study:

  • To develop a cost-effective and accessible method for producing hyperpolarized gases for pulmonary MRI.
  • To demonstrate the feasibility of using proton-hyperpolarized diethyl ether for lung ventilation imaging on a clinical MRI scanner.

Main Methods:

  • Batch-mode production of proton-hyperpolarized diethyl ether gas using parahydrogen and ethyl vinyl ether.
  • Injection of hyperpolarized diethyl ether gas into excised rabbit lungs.
  • Sub-second 2D MRI acquisition at 0.35T with 2x2 mm2 in-plane resolution.

Main Results:

  • Successfully produced a 0.1-liter bolus of hyperpolarized diethyl ether gas in 1 second.
  • Achieved high-resolution lung ventilation imaging on a standard clinical MRI scanner without modifications.
  • Demonstrated the potential for widespread clinical adoption of this new contrast agent.

Conclusions:

  • Proton-hyperpolarized diethyl ether gas is a viable alternative to 129Xe for pulmonary MRI.
  • This method overcomes the cost and equipment limitations associated with current hyperpolarized gas MRI.
  • Enables broader clinical application of MRI for diagnosing and monitoring lung diseases.