[Light production from intensifying screens (theoretical and experimental aspects)]

Area of Science:

• Medical Physics
• Materials Science

Background:

• Intensifying screens are crucial for X-ray detection, converting X-ray energy into light.
• Optimizing light conversion efficiency is key to improving image quality and reducing radiation dose.

Purpose of the Study:

• To experimentally determine the light conversion efficiency of various intensifying screens when exposed to X-rays.
• To establish a method for predicting screen light output and spectra based on X-ray spectra and screen properties.

Main Methods:

• Experimental measurement of light output from different intensifying screens across an X-ray energy range (10-100 keV).
• Development of absolute speed curves to characterize screen response.
• Analysis of the influence of the K-edge energy on phosphor behavior.

Main Results:

• Absolute speed curves were generated for each screen, detailing light output relative to incident X-ray energy.
• The study demonstrated that knowledge of X-ray tube emission spectra can accurately forecast screen light output and emerging spectra.
• The K-edge was identified as a significant factor influencing both radiation filtration and light conversion efficiency.

Conclusions:

• The K-edge energy is a critical parameter for understanding and optimizing phosphor performance in intensifying screens.
• The findings enable more accurate prediction of intensifying screen performance, aiding in the design of advanced X-ray imaging systems.
• This research contributes to the development of more efficient and effective X-ray detection technologies.