Patent ID: 8517607

Claim:
An X-ray generation device including an X-ray tube and a high-voltage generation unit inside a housing and also having insulating oil filled in the housing, the X-ray tube being configured to generate an X ray, the X-ray generation device characterized in that the X-ray tube is arranged inside an X-ray tube holder covering the X-ray tube entirely in a circumferential direction thereof, a material of the X-ray tube holder contains at least bismuth oxide and a resin, the X-ray tube holder includes an opening and a plurality of slits, the opening being provided in a portion corresponding to an X-ray irradiation window through which the X-ray tube applies the X ray, the slits allowing the insulating oil to circulate between an inside and an outside of the X-ray tube holder, and each of the slits of the X-ray tube holder is formed in such a way as to maintain an X-ray shielding distance with which X rays scattering radially from the X-ray tube are shielded, and to be slanted from the outside to the inside of the X-ray tube holder in such a direction that an inner opening of the slit is further away from a focal spot of the X-ray tube than is an outer opening of the slit.