Rapid PROPELLER‐MRI: A combination of iterative reconstruction and under‐sampling |
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| Authors: | Ashish A Tamhane PhD Konstantinos Arfanakis PhD Mark Anastasio PhD Xiaodong Guo PhD Michael Vannier MD Jia‐Hong Gao PhD |
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| Institution: | 1. Brain Research Imaging Center and Department of Radiology, The University of Chicago, Chicago, Illinois, USA;2. Department of Biomedical Engineering, Illinois Institute of Technology, Chicago, Illinois, USA;3. Department of Biomedical Engineering, Washington University, Saint Louis, Missouri, USA;4. MRI Research Center, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, China;5. Beijing City Key Lab for Medical Physics and Engineering, School of Physics, Peking University, Beijing, China |
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| Abstract: | Purpose: To develop a technique that is able to reduce acquisition time and remove uneven blurring in reconstructed image for PROPELLER MRI. By using under‐sampling and iterative reconstruction, this proposed technique will be less sensitive to subject motion. Materials and Methods: Numerical simulations, as well as experiments on a phantom and healthy human subjects were performed to demonstrate advantages of a combination of under‐sampled acquisition and iterative reconstruction. Method of motion correction was modified to increase accuracy of motion correction for the under‐sampled PROPELLER acquisition. Results: It was demonstrated that the proposed approach achieved substantial acceleration of PROPELLER acquisition while maintaining its motion correction advantage. Conclusion: An effective method for reducing imaging time in PROPELLER was introduced in this study, which minimizes typical under‐sampling artifacts without uneven spatial resolution and maintains the ability of motion correction. J. Magn. Reson. Imaging 2012;36:1241–1247. © 2012 Wiley Periodicals, Inc. |
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| Keywords: | PROPELLER under‐sampling iterative reconstruction |
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