1. Nanjing University of Aeronautics and Astronautics Department of Nuclear Science and Technology, , Nanjing, 211106, China
2. Nanjing University of Aeronautics and Astronautics Joint International Research Laboratory on Advanced Particle Therapy, , Nanjing, 211100, China
3. Yale University School of Medicine Department of Therapeutic Radiology, , New Haven, Connecticut, 06530, United States
4. Neuboron Medtech Ltd. , Nanjing, Jiangsu, 211112, China