Sparse BLIP: BLind Iterative Parallel imaging reconstruction using compressed sensing

Authors

  • Huajun She,

    1. Department of Electrical and Computer Engineering, University of Utah, Salt Lake City, Utah, USA
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  • Rong-Rong Chen,

    1. Department of Electrical and Computer Engineering, University of Utah, Salt Lake City, Utah, USA
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  • Dong Liang,

    1. Paul C. Lauterbur Research Center for Biomedical Imaging, Shenzhen Key Laboratory for MRI, Institute of Biomedical and Health Engineering, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong, China
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  • Edward V. R. DiBella,

    1. Department of Radiology, University of Utah, Salt Lake City, Utah, USA
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  • Leslie Ying

    Corresponding author
    1. Department of Biomedical Engineering, The State University of New York at Buffalo, Buffalo, New York, USA
    2. Department of Electrical Engineering, The State University of New York at Buffalo, Buffalo, New York, USA
    • Correspondence to: Leslie Ying, Ph.D., Department of Biomedical Engineering, Department of Electrical Engineering, The State University of New York at Buffalo, 223 Davis Hall, Buffalo, NY 14260. E-mail: leiying@buffalo.edu

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Abstract

Purpose

To develop a sensitivity-based parallel imaging reconstruction method to reconstruct iteratively both the coil sensitivities and MR image simultaneously based on their prior information.

Methods

Parallel magnetic resonance imaging reconstruction problem can be formulated as a multichannel sampling problem where solutions are sought analytically. However, the channel functions given by the coil sensitivities in parallel imaging are not known exactly and the estimation error usually leads to artifacts. In this study, we propose a new reconstruction algorithm, termed Sparse BLind Iterative Parallel, for blind iterative parallel imaging reconstruction using compressed sensing. The proposed algorithm reconstructs both the sensitivity functions and the image simultaneously from undersampled data. It enforces the sparseness constraint in the image as done in compressed sensing, but is different from compressed sensing in that the sensing matrix is unknown and additional constraint is enforced on the sensitivities as well. Both phantom and in vivo imaging experiments were carried out with retrospective undersampling to evaluate the performance of the proposed method.

Results

Experiments show improvement in Sparse BLind Iterative Parallel reconstruction when compared with Sparse SENSE, JSENSE, IRGN-TV, and L1-SPIRiT reconstructions with the same number of measurements.

Conclusion

The proposed Sparse BLind Iterative Parallel algorithm reduces the reconstruction errors when compared to the state-of-the-art parallel imaging methods. Magn Reson Med 71:645–660, 2014. © 2013 Wiley Periodicals, Inc.

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