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MRI of the normal pericardium
AJR. American Journal of Roentgenology
|August 1, 1986
Summary
Magnetic Resonance Imaging (MRI) can visualize pericardial fluid and thickness changes during the cardiac cycle. This technique aids in detecting pericardial effusions.
Area of Science:
- Cardiovascular Imaging
- Radiology
- Cardiac Anatomy
Background:
- The pericardium's normal appearance on Magnetic Resonance Imaging (MRI) is not well-defined.
- Understanding normal pericardial parameters is crucial for diagnosing effusions.
Purpose of the Study:
- To determine the visibility and thickness of the normal pericardium using MRI.
- To assess changes in pericardial parameters throughout the cardiac cycle.
Main Methods:
- 18 healthy subjects underwent gated, multisection MRI in the transaxial orientation.
- A score-point system was used to quantify pericardial line visualization.
- Pericardial thickness was measured in midventricular sections.
Main Results:
- The pericardial line was better visualized during systole than diastole (p < 0.005).
- Pericardial thickness increased from 1.2 mm in diastole to 1.7 mm in systole (p < 0.001).
- Measured thickness exceeded typical anatomic measurements, suggesting fluid contribution.
Conclusions:
- MRI effectively visualizes the normal pericardium and its dynamic changes.
- MRI's sensitivity to pericardial fluid is valuable for detecting and quantifying effusions.