Title: Scintillator for an X-ray detector with a variable reflector
Application Number: 200580007005 Application Date: 2005.02.21
Publication Number: 1930491 Publication Date: 2007.03.14
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G01T1/20
Applicant(s) Name: Koninkl Philips Electronics NV Address:
Inventor(s) Name:
Attorney & Agent: chengtian zheng chenjing jun
Abstract:
    The invention concerns an X-ray detector with a photo-sensitive detector layer (10) above which a scintillation layer (30) for the conversion of X-rays (X) into photons (v) is disposed. Photons (v) are reflected back into the scintillation layer (30) by a reflector (40) that is provided on the scintillation layer (30) for an improved signal gain and signal-to-noise ratio. The reflectivity of the reflector (40) can be externally controlled. This is achieved for example by a reflective layer (41, 42, 43) of E-Ink being disposed between two electrodes (44a, 44b). Thus the reflectivity can be decreased at sufficiently high X-ray doses in order to improve image sharpness and dynamic range of the detector.
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