1. Department of Radiological Science, Catholic University of Daegu, Hayang-ro, Hayang, Gyeongsan, Gyeongbuk, Republic of Korea
2. Department of Radiologic Technology, Daegu Health College, Youngsong-ro, Buk-gu, Daegu, Republic of Korea
3. Pohng Accelerator Laboratory, Nam-gu, Pohng, Gyeongbuk, Republic of Korea
4. Department of Mechanical Engineering, Chubu University, Matsumoto-cho, Kasugai, Aichi, Japan