Patent ID: 6479834
Filing Date: 2002-11-12
Classification: G01T

Abstract:
A process for recording and reproducing a radiation image comprising the steps of:applying a radiation having passed through an object or having radiated from an object onto a radiation image storage panel to absorb energy of the radiation, said radiation image storage panel comprising stimulable phosphor particles wherein the stimulable phosphor particles vary in their mean particle sizes in the depth direction of the storage panel in such manner that the mean particle size on one surface side is smaller than the mean particle size on the other surface side; sequentially applying stimulating rays onto the radiation image storage panel on the surface side having the stimulable phosphor particles of the smaller mean particle size to excite the stimulable phosphor particles in the storage panel whereby releasing the radiation energy stored in the phosphor particles as light emission; collecting the light emission from both surface sides of the radiation image storage panel; converting the light emission collected on each side into electric signals; combining the electric signals having been converted from the light emission collected on each side; and reproducing the object in the form of a radiation image from the combined electric signals; wherein the radiation image storage panel comprises a transparent support sheet, a phosphor layer comprising the stimulable phosphor particles, and a transparent protective film, and the mean particle sizes of the stimulable phosphor particles in the phosphor layer vary in the depth direction of the storage panel in such manner that the mean particle size on the surface side facing the protective film is smaller than the mean particle size on the surface side facing the support sheet.