1. Shida, T., Suganuma, T. and Hashizume, T.: Studies on the one shot energy subtraction technique using a metal filter.Nippon. Act. Radiol. 45(3):542–544, 1985 (in Japanese)
2. Nishitani, H. and Matsuura, K.: Dual-energy projection radiography using condenser discharge X-ray generator and FCR—Determination of technical facotrs—.Nippon. Act. Radiol. 47(4): 644–650, 1987 (in Japanese)
3. Cho, T. and Sakamoto, H.: One-shot energy subtraction radiography using screens and imaging plates. Memoirs of Kyushu University School of Health Sciences. 17: 1–7, 1990 (in Japanese)
4. Matsushita, T., Takeda, K., Maeda, H., Sakuma, H., Yamaguchi, N., Okamura, A. and Ishida, M.: Clinical application of energy subtraction imaging using digital radiography for excretoly urography in infants.Jpn. J. Clin. Radiol. 32(13): 1539–1545, 1987 (in Japanese)
5. Kamimura, R. and Takashima, T.: Single exporsure energy subtraction chest radiography—Clinical survey on utility of bone image—.Nippon. Act. Radiol. 49(5): 562–567, 1989 (in Japanese)