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A motion correction scheme by twin-echo navigation for diffusion-weighted magnetic resonance imaging with multiple RF
1Johns Hopkins University Medical School, Department of Radiology and Radiological Science, Baltimore, Maryland 21205, USA.
Magnetic Resonance in Medicine
|October 15, 1998
Summary
This study introduces a novel navigator echo technique for motion correction in diffusion-weighted fast spin-echo (FSE) MRI. The method effectively addresses phase shifts, improving image quality in phantom and in vivo studies.
Area of Science:
- Medical Imaging
- Magnetic Resonance Imaging (MRI)
Background:
- Motion artifacts are a significant challenge in diffusion-weighted fast spin-echo (FSE) MRI.
- Conventional motion correction methods are complicated by unique phase behaviors in FSE sequences.
Purpose of the Study:
- To introduce and evaluate a new motion correction scheme for diffusion-weighted FSE sequences.
- To address the complexities of phase oscillations and phase relationships inherent in FSE imaging.
Main Methods:
- Development of a novel motion correction scheme utilizing the navigator echo technique.
- Consecutive acquisition of two navigator echoes to monitor inter-echo and intra-echo train phase shifts.
- Application and validation of the technique in both phantom and in vivo studies.
Main Results:
- The proposed navigator echo technique effectively corrects for motion-induced phase shifts in FSE sequences.
- Demonstrated feasibility and improved image quality in phantom experiments.
- Successful application in in vivo studies, showcasing its practical utility.
Conclusions:
- The new navigator echo-based motion correction scheme is a viable solution for improving diffusion-weighted FSE MRI.
- This technique enhances the robustness and diagnostic accuracy of FSE imaging in the presence of patient motion.