MODELING THE DETECTIVE QUANTUM EFFICIENCY OF SCINTILLATORS USED IN MEDICAL IMAGING RADIATION DETECTORS

摘要

1. The purpose of this work was to model and compare the zero-frequency detective quantum efficiency (DQE(0)) of Gd_2O_2S:Tb, Gd_2O_2S:Eu Gd_2O-2S:Pr, Gd_2O_2S: Pr, Ce, F and YTaO_4:Nb granular scintillators for use X-ray medical imaging detectors. The work uses a mathematical model based on a photon diffusion differential equation. X-ray tube voltage was considered to vary from 10 and 200 kV while phosphor screen thickness ranged between 10 and 160 mg/cm~2 coating .