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Related Experiment Videos

Thoracic magnetic resonance imaging: physics and pulse sequences

J R Mayo1

  • 1Department of Radiology, University of British Columbia, Vancouver, Canada.

Journal of Thoracic Imaging
|January 1, 1993
PubMed
Summary

This article explains magnetic resonance (MR) physics for radiologists to improve chest imaging. Understanding MR physics and motion suppression techniques enhances thoracic scan quality, particularly for the heart and great vessels.

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Area of Science:

  • Medical Imaging Physics
  • Radiology

Background:

  • Thoracic magnetic resonance (MR) imaging protocol optimization is complex due to cardiac and respiratory motion, and blood flow.
  • Understanding MR physics is crucial for effective thoracic imaging.
  • Lung parenchyma assessment is limited by magnetic susceptibility and low proton density.

Purpose of the Study:

  • To summarize basic magnetic resonance (MR) physics concepts for radiologists.
  • To guide the optimization of MR imaging protocols for the chest.
  • To discuss recent advancements and suggested protocols for thoracic MR imaging.

Main Methods:

  • Review of fundamental magnetic resonance (MR) physics principles.
  • Discussion of motion-suppressing techniques (motion compensation, respiratory compensation, spatial presaturation).

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  • Analysis of factors affecting MR imaging of the lung parenchyma (magnetic susceptibility, proton density).

    • Main Results:

    • Thorough understanding of MR physics facilitates appropriate application of motion-suppressing techniques.
    • Short echo times show promise for improving MR image quality in lung parenchyma assessment.
    • Specific imaging protocols for chest wall, mediastinum, hilum, heart, and great vessels are presented.

    Conclusions:

    • Optimizing thoracic MR imaging requires a solid grasp of MR physics and motion artifact reduction.
    • Despite limitations, advancements in MR techniques are enhancing chest imaging capabilities.
    • The article provides practical guidance for radiologists performing thoracic MR examinations.