The code for paper
Xu, Zheng, Yeqing Li, Leon Axel, and Junzhou Huang. "Efficient preconditioning in joint total variation regularized parallel MRI reconstruction." In International Conference on Medical Image Computing and Computer-Assisted Intervention, pp. 563-570. Springer, Cham, 2015.
Xu, Zheng, Sheng Wang, Yeqing Li, Feiyun Zhu, and Junzhou Huang. "Prim: An efficient preconditioning iterative reweighted least squares method for parallel brain mri reconstruction." Neuroinformatics 16, no. 3-4 (2018): 425-430.