PWLS-PR: low-dose computed tomography image reconstruction using a patch-based regularization method based on the penalized weighted least squares total variation approach - Fu, Jing; Feng, Fei; Quan, Huimin; Wan, Qian; Chen, Zixiang; Liu, Xin; Zheng, Hairong; Liang, Dong; Cheng, Guanxun; Hu, Zhanli (Quantitative Imaging in Medicine and Surgery, 2021)