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Related Experiment Videos

MR imaging of pleural effusions.

S D Davis1, C I Henschke, D F Yankelevitz

  • 1Department of Radiology, New York Hospital-Cornell Medical Center, NY 10021.

Journal of Computer Assisted Tomography
|March 1, 1990
PubMed
Summary

Magnetic resonance (MR) imaging effectively differentiates pleural effusions. Complex exudates showed higher MR intensity than simple exudates and transudates, aiding diagnosis.

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Area of Science:

  • Radiology
  • Medical Imaging
  • Pulmonology

Background:

  • Pleural effusions require accurate characterization for appropriate management.
  • Distinguishing between transudates, simple exudates, and complex exudates is clinically significant.
  • Non-invasive imaging modalities are valuable for evaluating pleural effusions.

Purpose of the Study:

  • To investigate the in vivo magnetic resonance (MR) characteristics of different types of pleural effusions.
  • To correlate MR imaging findings with thoracentesis results.
  • To assess the utility of MR in differentiating transudates, simple exudates, and complex exudates.

Main Methods:

  • MR imaging was performed on 22 patients with pleural effusions.
  • Thoracentesis was performed for fluid analysis.

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  • Quantitative (normalized MR intensities, T2 values) and qualitative (visual assessment) MR parameters were analyzed.

    • Main Results:

    • Significant differences in normalized MR intensities were observed: complex exudates > simple exudates > transudates.
    • Echo times of 66 ms and 99 ms provided the best differentiation.
    • Qualitative assessment of signal intensity and effective T2 values also aided differentiation.
    • MR effectively evaluated effusion heterogeneity, loculation, and size.

    Conclusions:

    • Magnetic resonance imaging can effectively characterize pleural effusions non-invasively.
    • Quantitative and qualitative MR parameters aid in differentiating effusion types.
    • MR is valuable for initial characterization and serial follow-up of pleural effusions, though not specific for etiology.