1 Medical Physics & Informatics Laboratory of Electronics Engineering, National Kaohsiung University of Applied Sciences, Kaohsiung 80778, Taiwan ; Graduate Institute of Clinical Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan.
2 Department of Radiation Oncology, Institute for Advanced Radiation Oncology, Monmouth Medical Center, Barnabas Health, Long Branch, NJ 07601, USA.
3 Department of Radiation Oncology, Columbia University, New York, NY 10032, USA.
4 Department of Radiation Oncology, City of Hope National Medical Center, Duarte, CA 91010, USA.
5 Department of Radiation Oncology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung 83305, Taiwan.
6 Department of Radiation Oncology of E-DA Hospital, Kaohsiung 82445, Taiwan ; Department of Medical Imaging and Radiological Sciences of I-Shou University, Kaohsiung 82445, Taiwan.