Rapid PROPELLER-MRI: a combination of iterative reconstruction and under-sampling.

Autor: Tamhane AA; Brain Research Imaging Center and Department of Radiology, The University of Chicago, Chicago, Illinois 60637, USA., Arfanakis K, Anastasio M, Guo X, Vannier M, Gao JH
Jazyk: angličtina
Zdroj: Journal of magnetic resonance imaging : JMRI [J Magn Reson Imaging] 2012 Nov; Vol. 36 (5), pp. 1241-7. Date of Electronic Publication: 2012 Jun 11.
DOI: 10.1002/jmri.23720
Abstrakt: 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.
(Copyright © 2012 Wiley Periodicals, Inc.)
Databáze: MEDLINE
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