READING SYSTEM OF RADIOGRAPHIC IMAGE

摘要

PURPOSE:To improve the power of separation between accelerated exciting light and accelerated fluorescence by using laser light as the accelerated exciting light and using the combination of two or more kinds of filter different in half- value width for the purpose of separating the accelerated exciting light and the accelerated fluorescence. CONSTITUTION:An object 12 is arranged between a radiation generator 11 and a radiographic image conversion panel 13, and radiation is irradiated to the object 12. Electrons and/or positive holes stored in the trap level of an accelerated fluorescence layer of the radiographic image conversion panel 13 are excited by a laser light source 14 to radiate a stored image as the accelerated fluorescence. This accelerated fluorescence is separated from the laser light by two or more kinds of filter 18 different in half-value width and is converted to an electric signal by a photodetector 15. The electric signal of the photodetector 15 is sent to an image reproducing device 16 and is displayed as a radiographic image on an image display device 17. Thus, the power of separation between the accelerated exciting light and the accelerated fluorescence is high sufficiently to obtain the practical radiographic image of less noise.