1. Department of Radiologic Technology, Daegu Health College, Youngsong-ro 15, Buk-gu, Daegu 702-722, Republic of Korea
2. Department of Therapeutic Radiology & Oncology, College of Medicine, Yeungnam University, Nam-gu, Daegu 705-717, Republic of Korea
3. Department of Nuclear Medicine, College of Medicine, Yeungnam University, Nam-gu, Daegu 705-717, Republic of Korea