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Related Experiment Videos

Pulmonary vasculature: high-resolution MR imaging. Work in progress.

H Hatabu1, W B Gefter, H Y Kressel

  • 1David W. Devon Medical Imaging Center, Department of Radiology, Hospital of the University of Pennsylvania, Philadelphia 19104.

Radiology
|May 1, 1989
PubMed
Summary

High-resolution magnetic resonance (MR) imaging visualizes small pulmonary vessels. Advanced techniques like gradient recalled acquisition in a steady state (GRASS) and electrocardiographic (ECG) gating show promise for detailed lung vasculature imaging.

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Area of Science:

  • Medical Imaging
  • Radiology
  • Cardiovascular Imaging

Background:

  • High-resolution magnetic resonance (MR) imaging offers potential for visualizing intricate pulmonary vascular structures and blood flow.
  • Accurate depiction of small pulmonary vessels is crucial for diagnosing and managing various cardiopulmonary conditions.

Purpose of the Study:

  • To evaluate the effectiveness of specific high-resolution MR imaging techniques in depicting small pulmonary vascular structures.
  • To assess the impact of surface coil configuration, acquisition methods, and gating on image quality and vessel visualization.

Main Methods:

  • Utilized high-resolution MR imaging on five healthy volunteers.
  • Employed dual 5-inch surface coils, a 256x256 matrix, and a 24-cm field of view.
  • Compared spin-echo acquisition with electrocardiographic (ECG) gating (systole/diastole) and gradient recalled acquisition in a steady state (GRASS) with breath-holding.

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Main Results:

  • Small peripheral pulmonary vascular structures were successfully depicted, with most subsegmental and sixth- to seventh-order branches visualized, particularly near the coils.
  • Gradient recalled acquisition in a steady state (GRASS) with dual surface coils and breath-holding visualized fifth- and sixth-order branches.
  • Preliminary findings suggest that combining high-resolution MR techniques with ECG gating in diastole effectively images small pulmonary vessels.

Conclusions:

  • High-resolution MR imaging, particularly with GRASS and ECG gating, demonstrates significant potential for visualizing small pulmonary vasculature.
  • Further investigation is warranted to determine the sensitivity and reproducibility of these MR techniques for pulmonary vessel imaging.