Lei Duan1, Bo-Han Zhang2, Jia-Xu Liao1, Xiao-Hua Zheng3. 1. Department of Radiology, The Sixth People's Hospital of Chengdu, 16 Jianshe South Street, Chenghua District, Chengdu, 610000, China. 2. Department of Liver Surgery, Liver Transplantation Center, West China Hospital of Sichuan University, 37 Guoxue Lane, Wuhou District, Chengdu, 610000, China. bzhang0326@gmail.com. 3. Department of Radiology, The Sixth People's Hospital of Chengdu, 16 Jianshe South Street, Chenghua District, Chengdu, 610000, China. zhxh30@163.com.