| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain printing ink which allows the exact and easy check of the position of pricked part or operated part, etc., in the examinee and the information on the examinee, etc., from an X-ray photograph by incorporating specific metals as an X-ray opaque material into this ink. SOLUTION: The ink for printing an X-ray opaque sheet used for photographing of the X-ray photograph for medical treatment with an X-ray opaque image contains the X-ray opaque material and a binder resin. The X-ray opaque material includes tantalum, tungsten, platinum and gold and is more preferably the tungsten. The X-ray opaque material is added in the form of fine powder to the binder resin to provide the binder resin with an adequate viscosity and flowability. The particle diameter of the fine metallic powder is preferably about 0.05 to 5μm. An acrylic resin, polyester resin, etc., are adequately used as the binder resin. The X-ray opaque material is incorporated at 10 to 60 vol.%, more preferably 25 to 50 vol.% into the ink in order to reduce X-ray transmittance to <=20%.</p> |
