FIELD: physics.
SUBSTANCE: according to one version of the present invention, a radiation detector (10) for detecting primary radiation (6) comprises a scintillator (12) which generates converted primary radiation in response to incident primary radiation (6) and a photodetector (14) for detecting the converted primary radiation. The radiation detector (10) further comprises a secondary radiation source (20) for irradiating the scintillator (12) with secondary radiation (22) having wavelength different from that of the first radiation (6) and which is capable of producing a spatially more uniform response of the scintillator (12) to primary radiation. In one version of the invention, the radiation detector (10) is an X-ray detector of an X-ray imaging apparatus where the primary radiation is X-ray radiation and the secondary radiation has a wavelength between 350 nm and 450 nm. According to one version of the invention, the irradiation with the secondary radiation, e.g. UV radiation, produces a uniform gain distribution of the X-ray detector (10).
EFFECT: providing uniform spatial gain distribution.
12 cl, 10 dwg
