1. Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, Hsinchu, Taiwan.
2. Institute of Nuclear Energy Research, Longtan, Taiwan.
3. Department of Nuclear Medicine, Buddhist Tzu Chi General Hospital, Hualien, Taiwan.
4. Department of Radiological Technology, Tzu Chi College of Technology, Hualien, Taiwan.
5. School of Medicine, Tsinghua University, Beijing, China.
6. Institute of Nuclear Engineering and Science, National Tsing Hua University, Hsinchu, Taiwan.