The method of manufacturing

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PROBLEM TO BE SOLVED : To provide a radiographic image conversion panel having a high relative luminance and showing satisfactory resolution (referred also to as little image blurring), and a manufacturing method thereof. SOLUTION : This radiographic image conversion panel is characterized in that it has a phosphor layer containing a spherical phosphor particle including at least one of rare earth elements selected from the group consisting of Nd, Gd, Tb, Dy, Ho, Er, Tm, Eu, Y and Yb on a support body.