1 Department of Medical Administration, Pingtung Christian Hospital, Pingtung, Taiwan; Department of Electrical Engineering, I-Shou University, Kaohsiung, Taiwan.
2 Department of Nuclear Medicine, Chung-Kang Branch, Cheng-Ching General Hospital, Taichung, Taiwan; Department of Medical Imaging and Radiology, Shu-Zen Junior College of Medicine and Management, Kaohsiung, Taiwan.
3 Department of Biomedical Engineering, I-Shou University, Kaohsiung, Taiwan.
4 Department of Medical Imaging and Radiology, Shu-Zen Junior College of Medicine and Management, Kaohsiung, Taiwan. Electronic address: shchan@ms.szmc.edu.tw.