A Splitting Bregman-Based Compressed Sensing Approach for Radial UTE MRI
A Splitting Bregman-Based Compressed Sensing Approach for Radial UTE MRI
复制标题
基于分裂 Bregman 的径向 UTE MRI 压缩感知方法
DOI:
10.1109/tasc.2016.2582658
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发表时间:
2016-06
影响因子:
1.8
通讯作者:
Zheng Yahong Rosa
中科院分区:
文献类型:
--
作者:
Bi Dongjie;Ma Lan;Xie Xuan;Xie Yongle;Li Xifeng;Zheng Yahong Rosa
A splitting Bregman-based compressed-sensing (CS) approach (CS-SplitBerg), using the nonuniform fast Fourier transform, is proposed to reconstruct radial magnetic resonance (MR) images from undersampled k- space measurements. Using the splitting Bregman framework, the proposed CS-SplitBerg approach takes fully into account the measurement noise and exploits the combined sparsity of MR images, i.e., ℓ1- norm and total variation regularization. With convergence guaranteed, the CS-SplitBerg approach uses the Bregman update process and some auxiliary variables to relax the constrained optimization problem to a sequence of easily solved unconstrained minimization problems. Experimental results using both a phantom example and a mouse cardiac example demonstrate that, under different undersampling rates, the CS-SplitBerg approach performs better than the CS-CG approach, which was introduced in our previous work. With an affordable computational cost by considering the influences of noise, the CS-SplitBerg approach can further reduce the necessary number of MR imaging (MRI) measurements for the recovery and better differentiate true MRI images from noisy data.
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影响因子:
3.9
作者:
Dongjie Bi;Yongle Xie;Xifeng Li;Y. R. Zheng
通讯作者:
Dongjie Bi;Yongle Xie;Xifeng Li;Y. R. Zheng
影响因子:
1.8
作者:
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通讯作者:
Y. Lvovsky;P. Jarvis
影响因子:
10.6
作者:
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通讯作者:
Eggers, H
影响因子:
14.9
作者:
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通讯作者:
Fessler JA
影响因子:
3.3
作者:
Zhang, YT;Hetherington, HP;Twieg, DB
通讯作者:
Twieg, DB