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Diaphragmatic motion: fast gradient-recalled-echo MR imaging in healthy subjects
D S Gierada1, J J Curtin, S J Erickson
1Department of Radiology, Medical College of Wisconsin, Milwaukee 53226.
Radiology
|March 1, 1995
Summary
Fast gradient-recalled-echo (GRE) magnetic resonance (MR) imaging reliably shows diaphragmatic motion. This technique may help in studying normal and abnormal respiratory mechanics.
Area of Science:
- Medical Imaging
- Respiratory Physiology
- Magnetic Resonance Imaging
Background:
- Diaphragmatic motion is crucial for respiratory mechanics.
- Accurate imaging of diaphragmatic movement is essential for diagnosing respiratory conditions.
Purpose of the Study:
- To assess the feasibility of using fast gradient-recalled-echo (GRE) magnetic resonance (MR) pulse sequences for imaging diaphragmatic motion.
Main Methods:
- Fast GRE MR pulse sequences were employed in sagittal and coronal planes.
- Ten healthy volunteers underwent 1.2-second scans during slowed breathing.
- Diaphragmatic motion was analyzed both subjectively (cine loops) and quantitatively (displacement measurements).
Main Results:
- Adequate temporal and spatial resolutions were achieved in all participants.
- Mean diaphragmatic dome excursion was 4.4 cm (right) and 4.2 cm (left).
- A significant gradient of excursion was observed from anterior to posterior, and lateral excursion exceeded medial excursion.
Conclusions:
- Fast GRE MR imaging is a reliable method for visualizing diaphragmatic motion.
- This technique holds potential for investigating both normal and abnormal respiratory mechanics.