Patent ID: 7212610

Claim:
An X-ray tube adjusting method, wherein an initial image of a subject to be imaged engraved with a given pattern is stored in storage means beforehand in association with identification information of an X-ray tube, said initial image having been imaged by an X-ray inspection apparatus having said X-ray tube with a focal diameter of an electron beam at a target of said X-ray tube adjusted so as to be a predetermined value and an imaging device, and comprising: an imaging step at which said X-ray inspection apparatus images a test image of said subject to be imaged at a time parts of said X-ray tube are replaced; a presentation step at which the initial image associated with the identification information of said X-ray tube is acquired from said storage means and presented in such a manner as to be comparable with said test image; and a focus adjusting step at which referring to images presented at said presentation step, a focus lens of said X-ray tube is adjusted in such a way that a focal diameter of the electron beam at a target of said X-ray tube becomes a desired state.