1. Department of Medical Physics, Hebei Medical University, Shijiazhuang, Hebei, China
2. Key Labarotory of Medical Imaging Research and Application of Hebei Province, Shijiazhuang, Hebei, China
3. Department of Electrical and Computer Engineering, Laval University, Quebec, Canada
4. Shijiazhuang Yuxun Electronics Co., Ltd, Shijiazhuang, Hebei, China
5. Department of Foreign Languages, Hebei Medical University, Shijiazhuang, Hebei, China