College of Medical Imaging, Shanxi Medical University, Taiyuan, 030001, Shanxi, China. College of Basic Medicine, Shanxi Medical University, Taiyuan, 030001, Shanxi, China. Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA. School of Public Health, Health Science Center, Xi'an Jiaotong University, No.76 Yanta West Road, Xi'an, 710061, Shaanxi, China.