Absolute efficiency of Gd₂O₂S:Tb screens under fluoroscopic conditions

Abstract

The absolute efficiency of Gd2O2S:Tb screens under fluoroscopic conditions was studied and found to vary between 0.5 and 9.0*10-5 W m-2 mR-1 s depending on the X-ray tube voltage and on the screen's weight. Theoretical calculations based on the uniform screen model gave results in close agreement with experimental data.