Patent ID: 7247873

Claim:
A quality control system for an irradiation apparatus comprising: a radiation image reading means which reads out a radiation image from a stimulable phosphor panel which has been disposed in a predetermined position to receive irradiation of position check radiation from an irradiation means and irradiation of uniform radiation from the irradiation means to an area larger than the area exposed to the position check radiation and to receive irradiation of position check light, the position check light being visible, from a position check light irradiation means after receiving the irradiation of the uniform radiation and to form a radiation image, and a relative position obtaining means which obtains the relation between the irradiating position of the position check radiation and the irradiating position of the position check light on the basis of the radiation image read by the radiation image reading means, wherein the radiation image includes a first image of the position check radiation and a second image of the position check light, and the relative position obtaining means obtains the relation between the irradiating position of the position check radiation and the irradiating position of the position check light on the basis of the first image and the second image read by the radiation image reading means.