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Fast oxygen-enhanced multislice imaging of the lung using parallel acquisition techniques.
Olaf Dietrich1, Christoph Losert, Ulrike Attenberger
1Department of Clinical Radiology-Grosshadern, Ludwig Maximilian University of Munich, 81377 Munich, Germany. od@dtrx.net
Magnetic Resonance in Medicine
|May 21, 2005
Summary
Optimized oxygen-enhanced MRI of the lung utilizes parallel imaging to acquire more slices faster. This technique improves lung coverage without compromising oxygen-induced signal changes, crucial for lung imaging research.
Area of Science:
- Medical Imaging
- Pulmonary Medicine
- Magnetic Resonance Imaging
Background:
- Oxygen-enhanced MRI (OE-MRI) is valuable for assessing lung function.
- Optimizing acquisition techniques is essential for improving OE-MRI efficiency and coverage.
Purpose of the Study:
- To evaluate an optimized multislice acquisition technique for lung OE-MRI.
- To assess the impact of parallel imaging on OE-MRI performance and acquisition time.
Main Methods:
- An inversion recovery HASTE sequence with respiratory and ECG triggering was used.
- Three acquisition schemes were compared: 4 slices without parallel imaging, 4 slices with parallel imaging, and 6 slices with parallel imaging.
- Acquisitions were repeated with alternating room air and oxygen inhalation.
Main Results:
- Parallel imaging enabled the acquisition of six or more slices, enhancing lung coverage.
- No significant difference in oxygen-induced signal increase was observed with or without parallel imaging.
- Parallel imaging significantly reduced the end-expiration time per repetition for acquiring six slices (4112 ms vs. 2727 ms).
Conclusions:
- Optimized multislice OE-MRI with parallel imaging allows for faster, more comprehensive lung coverage.
- This technique is effective for improving the efficiency of lung OE-MRI without affecting signal changes.
- The optimized technique facilitates advanced pulmonary function assessment using OE-MRI.