Aging of imaging properties of a CMOS flat-panel detector for dental cone-beam computed tomography

We have experimentally investigated the long-term stability of imaging properties of a flat-panel detector in conditions used for dental x-ray imaging. The detector consists of a CsI:Tl layer and CMOS photodiode pixel arrays. Aging simulations were carried out using an 80-kVp x-ray beam at an air-kerma rate of approximately 5 mGy s−1 at the entrance surface of the detector with a total air kerma of up to 0.6 kGy. Dark and flood-field images were...