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Real-time geometric distortion correction for interventional imaging with echo-planar imaging (EPI)
Iulius Dragonu1, Baudouin Denis de Senneville, Bruno Quesson
1Laboratory for Molecular and Functional Imaging: from Physiology to Therapy, Unité Mixte de Recherche 5231 Centre National de la Recherche Scientifique/Université Bordeaux 2, Bordeaux, France.
Magnetic Resonance in Medicine
|February 5, 2009
Summary
This study introduces a novel correction method for echo-planar imaging (EPI) distortions, crucial for real-time MRI-guided interventions. The technique ensures accurate targeting during procedures, even for moving organs.
Area of Science:
- Medical Imaging
- Interventional Radiology
- Magnetic Resonance Imaging
Background:
- Real-time imaging is essential for MR-guided interventions.
- Echo-planar imaging (EPI) offers speed but suffers from geometric distortions.
- Accurate spatial correlation is vital for precise targeting.
Purpose of the Study:
- To develop and validate a real-time distortion correction method for EPI.
- To adapt existing dual EPI techniques for interventional settings.
- To ensure accurate image-to-patient positioning during dynamic procedures.
Main Methods:
- Utilized dual echo-planar imaging (EPI) acquisition with varied echo times.
- Developed a correction algorithm adaptable for real-time processing.
- Integrated the method for MR-thermometry guided thermal therapies.
Main Results:
- The proposed method effectively corrects EPI geometric distortions.
- Minimal impact on acquisition speed was observed.
- Negligible latency was added to data processing, suitable for mobile organs.
Conclusions:
- The developed correction method enhances the reliability of real-time MR-guided interventions.
- This approach is particularly beneficial for procedures involving mobile organs.
- It improves the precision of targeting in applications like MR-thermometry.
