Patent ID: 7153637

Claim:
A radiographic image conversion panel comprising a substrate having thereon a phosphor layer formed by a vapor-accumulation method, the phosphor containing an alkali metal halide stimulable phosphor represented by Formula (I): M1X.aM2X′ 2 bM3X″ 3 : eA Formula (I) wherein, M1 represents an alkali metal atom selected from the group consisting of Li, NA, K, Rb and Cs; M2 represents a divalent metal atom selected from the group consisting of Be, Mg, Ca, Sr, Ba, Zn, Cd, Cu and Ni; M3 represents a trivalent metal atom selected from the group consisting of Sc, Y, La, Ce, Pr, Nd, Pm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Al, Ga and In; X, X′ and X″ each represent independently a halogen atom selected from the group consisting of F, Cl, Br and I; A represents a metal atom selected from the group consisting of Eu, Tb, IN, Ce, TM, Dy, Pr, Ho, Nd, Yb, Er, Gd, Lu, Sm, Y, TI, Na, Ag, Cu and Mg; and a, b and e each represents a number in a range of 0 ≦a<0.5, 0 ≦b<0.5, and 0 ≦e <1.0 respectively. wherein a density variation coefficient of the metal atom represented by A in a surface direction of the phosphor layer is not more than 40%.