Title

Monte Carlo Studies of Metal/Phosphor Screen in Therapeutic X-Ray Imaging

Editor(s)

Nishikawa, R. M. and Whiting, B. R.

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.

Department(s)

Mining and Nuclear Engineering

Keywords and Phrases

Detection Efficiency; Spatial Resolution; Therapeutic X-Ray Imaging

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1999 Elsevier, All rights reserved.

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