Radiographic image storage panel and process for reading out a radiographic image

A process for reading out a radiographic image of remarkable sharpness comprising

• 1) irradiating a radiographic image storage panel having a layer, formed by vacuum evaporation and containing a stimulable alkali halide binderless phosphor, with an excitation ray at an oblique incident angle to a line normal to said panel, said phosphor comprising a pile-like structure, said alkali halide being of the formula
• M.sup.I X.aM.sup.II X.sub.2.sup.I.bM.sup.III X.sub.3.sup.II.cA
• wherein M.sup.I is at least one alkali metal selected from the group consisting of Li, Na, K, Rb and Cs;
• M.sup.II is at least one divalent metal selected from the group consisting of Be, Mg, Ca, Sr, Ba, Zn, Cd, Cu and Ni;
• M.sup.III is at least one trivalent metal selected from the group consisting of Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Al, Ga and In;
• each X, X.sup.I and X.sup.II is at least one halogen selected from the group consisting of F, Cl, Br and I;
• A is at least one metal selected from the group consisting of Eu, Tb, Ce, Tm, Dy, Pr, Ho, Nb, Yb, Er, Gd, Lu, Sm, Y, Tl, Na, Ag, Cu and Mg;
• and a and b are each 0 to 0.5 and c is 0 to 0.2, and
• 2) placing a condensing plane of stimulable fluorescence from said panel perpendicular to said normal line.