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Accelerating spin-lock imaging using signal compensated low-rank plus sparse matrix decomposition

Yuanyuan Liu¹, Yanjie Zhu¹, Yuxin Yang², Xin Liu¹, Hairong Zheng¹, and Dong Liang¹
¹Shenzhen Institutes of Advanced Technology, Shenzhen, China, ²Chongqing University of Technology, Chongqing, China, Chongqing, China

The proposed method can accurately reconstruct the

$T_{1\rho}$ -weighted image series and

$R_{1\rho}$ dispersion from highly undersampled k-space data, and thereby significantly reduce the scan time of

$T_{1\rho}$ imaging.

Figure 1. The reconstructed

$T_{1\rho}$ -weighted images at

$TSL=1$ ms with locking field amplitude w=500 Hz using the SCOPE method and the L+S method for net acceleration factor R=3 and 4, respectively.

Figure 2. The reconstructed

$T_{1\rho}$ -weighted images at

$TSL=40$ ms with locking field amplitude w=5000 Hz using the SCOPE method and the L+S method for net acceleration factor R=3 and 4, respectively.