1. Department of Radiology, Yamaguchi University Hospital
2. Department of Radiology, Yamaguchi University Hospital:(Present address)Presently at College of Medical Technology and Nursing, Kumamoto University
3. Department of Radiology, Yamaguchi University Hospital:(Present address)Presently at Fukuoka Higashi Byoin, National Sanatorium
4. Department of Radiology, Yamaguchi University Hospital:(Present address)Presently at Tokuyama Central Hospital