1. Institute of Medical Device and Imaging College of Medicine National Taiwan University No.1, Sec. 1, Jen Ai Rd. Taipei City Zhongzheng Dist. 100 Taiwan
2. Department of Biomedical Engineering University of California Davis CA 95616USA
3. Department of Nuclear Medicine Chang Gung Memorial Hospital No. 5 Fu‐Shin Street Kwei‐Shan Taoyuan County Taiwan