Radiographic intensifying screen.

摘要

A radiographic intensifying screen comprising a support and a fluorescent layer formed thereon, said fluorescent layer consisting essentially of at least one terbium-activated rare earth oxysulfide phosphor of the formula: (Lnl-x-y, Tbx, Ay)2O2S (I) wherein Ln is at least one element selected from the group consisting of Y, La, Gd and Lu, A is at least one element selected from the group consisting of Ce, Pr, Nd, Dy, Er and Tm, and x and y are numbers within the ranges of 0.002 </= x </= 0.20 and 0 </= y </=, 0.01, respectively, and at least one terbium-activated rare earth tantalate complex oxide phosphor of the formula: (Ln min 1-z, Tbz)2O3.mTa2O5.nB2O3 (II) wherein Ln min is at least one element selected from the group consiting of Y, La, Gd and Lu, and z, m and n are numbers within the ranges of 0.0001 </= z </= 0.1, 0.95 </= m </= 1.05 and 0 </= n </= 5.0, respectively.