1. Shandong Key Laboratory of Medical Physics and Image Processing, School of Physics and Electronics, Shandong Normal University, Jinan, Shandong, China
2. Department of Hepatobiliary Surgery, Second Hospital of Shandong University, Jinan, Shandong, China
3. Optical and Digital Image Processing Division, Qingdao NovelBeam Technology Company Ltd., Qingdao, Shandong, China