Monte Carlo Studies of Metal/Phosphor Screen in Therapeutic X-Ray Imaging
Abstract
In order to provide the optimal design parameters, we have investigated the characteristics of a combination of metal plate and phosphor screen, a typical X-ray sensor in electronic portal imaging system, by using Monte Carlo simulation. Detection efficiency and spatial resolution of the X-ray sensor were estimated based on the bremsstrahlung spectrum of the incident X-ray and for various thicknesses of metal plate and phosphor screen. The detection efficiency was calculated from the total absorbed energy and the spatial resolution was defined from the spatial distribution of the absorbed energy. Simulation results showed a trade-off relationship between the detection efficiency and the spatial resolution. It was also found that the detection efficiency and the spatial resolution were mainly determined by thickness of metal plate and phosphor screen, respectively. The simulation will be useful when determining the optimal thickness of phosphor screen as well as of metal plate for the sensor design of therapeutic X-ray imaging. © 1999 Elsevier Science B.V. All rights reserved.
Recommended Citation
H. Kim et al., "Monte Carlo Studies of Metal/Phosphor Screen in Therapeutic X-Ray Imaging," Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Elsevier, Jan 1999.
The definitive version is available at https://doi.org/10.1016/S0168-9002(98)01023-7
Department(s)
Nuclear Engineering and Radiation Science
Keywords and Phrases
Detection Efficiency; Spatial Resolution; Therapeutic X-Ray Imaging
International Standard Serial Number (ISSN)
0168-9002
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 1999 Elsevier, All rights reserved.
Publication Date
01 Jan 1999
