1. A radiation conversion panel for use in dual-energy radiography, having a matrix of pixels for generating electric charges depending on a radiation that has passed through a subject, comprising: first pixels, each of which is one out of every n (n≧3) adjacent pixels, and which, after a first energy-level image capturing cycle, are reset after electric charges have been read therefrom; and all pixels, including said first pixels, wherein, after the pixels have been reset, electric charges are read from all the pixels after a second energy-level image capturing cycle.