1. Department of Photonics Engineering; Yuan-Ze University; 135 Yuan-Tung Road Chung-Li 320 Taiwan
2. Advanced Optoelectronic Technology Center; National Cheng-Kung University; Tainan 701 Taiwan
3. Department of Electronic Engineering; Chang Gung University; 259 Wen-Hwa 1st Road, Kwei-Shan Tao-Yuan 333 Taiwan
4. Department of Nuclear Medicine; Chang Gung Memorial Hospital; No.5, Fuxing Street, Kwei-Shan Tao-Yuan 333 Taiwan