Tags

Type your tag names separated by a space and hit enter

Undersampled MRI reconstruction with patch-based directional wavelets.
Magn Reson Imaging. 2012 Sep; 30(7):964-77.MR

Abstract

Compressed sensing has shown great potential in reducing data acquisition time in magnetic resonance imaging (MRI). In traditional compressed sensing MRI methods, an image is reconstructed by enforcing its sparse representation with respect to a preconstructed basis or dictionary. In this paper, patch-based directional wavelets are proposed to reconstruct images from undersampled k-space data. A parameter of patch-based directional wavelets, indicating the geometric direction of each patch, is trained from the reconstructed image using conventional compressed sensing MRI methods and incorporated into the sparsifying transform to provide the sparse representation for the image to be reconstructed. A reconstruction formulation is proposed and solved via an efficient alternating direction algorithm. Simulation results on phantom and in vivo data indicate that the proposed method outperforms conventional compressed sensing MRI methods in preserving the edges and suppressing the noise. Besides, the proposed method is not sensitive to the initial image when training directions.

Authors+Show Affiliations

Department of Electronic Science, Fujian Provincial Key Laboratory of Plasma and Magnetic Resonance, Xiamen University, Xiamen 361005, China.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

22504040

Citation

Qu, Xiaobo, et al. "Undersampled MRI Reconstruction With Patch-based Directional Wavelets." Magnetic Resonance Imaging, vol. 30, no. 7, 2012, pp. 964-77.
Qu X, Guo D, Ning B, et al. Undersampled MRI reconstruction with patch-based directional wavelets. Magn Reson Imaging. 2012;30(7):964-77.
Qu, X., Guo, D., Ning, B., Hou, Y., Lin, Y., Cai, S., & Chen, Z. (2012). Undersampled MRI reconstruction with patch-based directional wavelets. Magnetic Resonance Imaging, 30(7), 964-77. https://doi.org/10.1016/j.mri.2012.02.019
Qu X, et al. Undersampled MRI Reconstruction With Patch-based Directional Wavelets. Magn Reson Imaging. 2012;30(7):964-77. PubMed PMID: 22504040.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Undersampled MRI reconstruction with patch-based directional wavelets. AU - Qu,Xiaobo, AU - Guo,Di, AU - Ning,Bende, AU - Hou,Yingkun, AU - Lin,Yulan, AU - Cai,Shuhui, AU - Chen,Zhong, Y1 - 2012/04/13/ PY - 2011/08/31/received PY - 2012/02/12/revised PY - 2012/02/17/accepted PY - 2012/4/17/entrez PY - 2012/4/17/pubmed PY - 2012/12/19/medline SP - 964 EP - 77 JF - Magnetic resonance imaging JO - Magn Reson Imaging VL - 30 IS - 7 N2 - Compressed sensing has shown great potential in reducing data acquisition time in magnetic resonance imaging (MRI). In traditional compressed sensing MRI methods, an image is reconstructed by enforcing its sparse representation with respect to a preconstructed basis or dictionary. In this paper, patch-based directional wavelets are proposed to reconstruct images from undersampled k-space data. A parameter of patch-based directional wavelets, indicating the geometric direction of each patch, is trained from the reconstructed image using conventional compressed sensing MRI methods and incorporated into the sparsifying transform to provide the sparse representation for the image to be reconstructed. A reconstruction formulation is proposed and solved via an efficient alternating direction algorithm. Simulation results on phantom and in vivo data indicate that the proposed method outperforms conventional compressed sensing MRI methods in preserving the edges and suppressing the noise. Besides, the proposed method is not sensitive to the initial image when training directions. SN - 1873-5894 UR - https://www.unboundmedicine.com/medline/citation/22504040/Undersampled_MRI_reconstruction_with_patch_based_directional_wavelets_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0730-725X(12)00060-4 DB - PRIME DP - Unbound Medicine ER -