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

• Published in: Journal of magnetic resonance imaging Vol. 36; no. 5; pp. 1241 - 1247
• Main Authors: Tamhane, Ashish A., Arfanakis, Konstantinos, Anastasio, Mark, Guo, Xiaodong, Vannier, Michael, Gao, Jia-Hong
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc., A Wiley Company 01.11.2012
• Subjects: Algorithms; Brain - anatomy & histology; Humans; Image Enhancement - methods; Image Interpretation, Computer-Assisted - methods; iterative reconstruction; Magnetic Resonance Imaging - methods; PROPELLER; Reproducibility of Results; Sample Size; Sensitivity and Specificity; Signal Processing, Computer-Assisted; under-sampling
• ISSN: 1053-1807; 1522-2586; 1522-2586
• DOI: 10.1002/jmri.23720

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.