Radiation image converting panel

摘要

The present invention relates a radiation image converting panel with a structure capable of arbitrarily controlling a change in luminance distribution of an entire panel surface after formation of a moisture-resistant protective film. The radiation image converting panel comprises a radiation converting film doped with Eu and covered with a moisture-resistant protective film. The Eu concentration in the radiation converting film is preliminarily adjested such that the Eu concentration at a central portion or peripheral portion of the film falls within an optimal range, and the other film portion is provided with a psitive or negative concentration gradient such that the Eu concentration thereof gradually become higher or lower than the optimal range. The liminance distritusion of the entire panel in which the moisture-resistant protective film has been formed can be controlled by providing the Eu concentration to be added with a concentration gradient.