1. Department of Medical Imaging and Radiological Sciences, I-Shou University, Kaohsiung 82445, Taiwan
2. Department of Radiation Oncology, E-Da Hospital, Kaohsiung 82445, Taiwan
3. Graduate Institute of Medical Sciences, Chang Jung Christian University, Tainan 71101, Taiwan
4. Department of Radiation Oncology, Chi Mei Medical Center, Tainan 71004, Taiwan
5. Department of Radiation Oncology, Tainan Sin-Lau Hospital, Tainan 70142, Taiwan
6. Medical Physics and Informatics Laboratory of Electronics Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 80778, Taiwan
7. PhD Program in Biomedical Engineering, Kaohsiung Medical University, Kaohsiung 80708, Taiwan