Abstract
Magnetic resonance imaging (MRI) is widely adopted for clinical diagnosis due to its non-invasively detection. However, acquisition of full k-space data limits its imaging speed. Compressed sensing (CS) provides a new technique to significantly reduce the measurements with high-quality MR image reconstruction. The sparsity of the MR images is one of the crucial bases of CS-MRI. In this paper, we present to use sparsity averaging prior for CS-MRI reconstruction in the basis of that MR images have average sparsity over multiple wavelet frames. The problem is solved using a Fast Iterative Shrinkage Thresholding Algorithm (FISTA), each iteration of which includes a shrinkage step. The performance of the proposed method is evaluated for several types of MR images. The experiment results illustrate that our approach exhibits a better performance than those methods that using redundant frame or a single orthonormal basis to promote sparsity.
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Acknowledgements
This study was supported by the Fundamental Research Funds for the Central Universities, China (No. 41112414), and the National Natural Science Foundation of China (Nos. 31470714, 31370710, 61661010).
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Huang, Jp., Zhu, Lk., Wang, Lh. et al. Compressed Sensing MRI Using Sparsity Averaging and FISTA. Appl Magn Reson 48, 749–760 (2017). https://doi.org/10.1007/s00723-017-0910-0
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DOI: https://doi.org/10.1007/s00723-017-0910-0