Patent ID: 7180079

Claim:
A radiation image storage panel which comprises a phosphor layer comprising energy-storing phosphor particles and a polymer binder and which satisfies the following conditions: T 1 ×d≧ 660 T 2 ×d≧ 660 D≧3.4 wherein each of T 1 , T 2 , d and D has the following meaning; T 1 : a transmittance in terms of percentage of the phosphor layer at a peak wavelength of a stimulation spectrum of the energy-storing phosphor particles; T 2 : a transmittance in terms of percentage of the phosphor layer at a peak wavelength of a stimulated emission spectrum of the energy-storing phosphor particles; d=10,000×W/ρ in which W is a weight of the energy-storing phosphor particles in a unit area of the phosphor layer expressed in terms of mg/cm 2 and ρ is a density of the energy-storing phosphor expressed in terms of g/cm 3 ; and D is a density of the energy-storing phosphor particles contained in the phosphor layer expressed in terms of g/cm 3 .