| 摘要 |
PURPOSE:To increase sensitivity by 10-20 times and to reduce the dosage of an examinee greatly by allowing a holder itself which contacts an X-ray film to fluoresce with high efficiency during X-ray irradiation. CONSTITUTION:Two X-ray films 2 and 2' and a light shielding sheet 3 are enclosed in a bag holder 1. The holder 1 is made of a flexible sheet formed by incorporating a fluorescent material for X rays in thermoplastic resin such as polyvinyl chloride. The holder 1 consists of a surface 1f close to an X-ray source and a rear surface member 1b and is welded to three sides of the holder 1 other than a side having a lid part 4 and the side having the lid part 4. Further, thin metallic foil such as lead foil may be stuck to the external surface of the read surface member 1b when necessary to cut off rear scattered rays. |
