Radiation image storage panel suitable for use in mammographic applications

1. Method of preparing a photostimulable storage phosphor screen or panel wherein said screen or panel comprises storage phosphor particles dispersed in a binder, wherein said particles have a particle size distribution having a d 99 which is not more than 15 μm, said d 99 expressing a grain size limit above which not more than 1% by weight of phosphor powder particles is present in said phosphor powder, wherein its structure noise parameter DQE2 rel exceeds a value of 0.70 and wherein a ratio of d 99 (expressed in μm) to DQE 2 rel is not more than 25:1, DQE 2 rel being the ratio of the DQE 2 obtained at a dose of 22 mR to the DQE 2 obtained at a dose of 3 mR, as expressed in formula (I)

DQE 2 rel =DQE 2(22 mR))/ DQE 2(3 mR)  (I)

which is representative for an amount of screen-structure noise produced by said screen or panel in the complete spatial frequency range comprising multiple firing steps and multiple milling steps, each firing step being followed by a milling step, and wherein each of said milling steps are performed in a continuous milling procedure, characterised in that at least said last milling procedure is performed at a milling rate higher than the former milling procedures.

2. Method according to claim 1 , wherein said last milling step is performed at a milling rate of not less than 8000 rpm.

3. Method according to claim 1 , wherein said last milling step is performed by air-jet milling.