Slot scintillation detector modeling for digital radiography

A scanning slot X-ray digital detector operating at relatively high photon energies, mainly 70 kVp for dental radiography, has been designed and model ed. In this energy range, further improvements are required in order to att ain optimal image quality for the lowest achievable mean absorbed dose to t he patient. This paper concerns the investigation of the physics of imaging using a structured screen composed of a scintillating fiber optic (LKH-6/C CD system) and its performance by Monte Carlo (MC) simulation. The A, facto r, X-ray cross-talk, quantum noise effect on resultant values of Detective Quantum Efficiency (DQE) and Modulation Transfer Function (MTF) are discuss ed. The results of this paper should serve as a useful guide in the enginee ring design of future structured screen/CCD based systems. (C) 2001 Elsevie r Science Ltd. All rights reserved.