Scattered radiation from radiographic intensifying screen: a Monte Carlo simulation

Regina C. Barroso; Delson Braz; Marcelino J. Anjos; Ricardo Tadeu Lopes; Carlos A. Castro

doi:10.1117/12.450787

19 December 2001 Scattered radiation from radiographic intensifying screen: a Monte Carlo simulation

Regina C. Barroso, Delson Braz, Marcelino J. Anjos, Ricardo Tadeu Lopes, Carlos A. Castro

Proceedings Volume 4508, Penetrating Radiation Systems and Applications III; (2001) https://doi.org/10.1117/12.450787
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

Abstract

In radiology, the X-ray film is placed between two screens. The development of radiological intensifying screens has reduced the radiation dose in patients about a factor of 10 in the last decades. The sensitivity of X-ray films is enlarged due to the fluorescent light from these screens. In addition, the primary radiation can be scattered coherently (Rayleigh scattering) and incoherently (Compton scattering) which will degrade the image resolution. Scattered radiation produced in Gd₂O₂Si:Tb intensifying screens was simulated by using a Monte Carlo radiation transport code - the EGS4 (Electron - Gamma Shower), which is a general purpose package for Monte Carlo simulation of the coupled transport of electrons and photons. The magnitude of scattered radiation striking the film is typically quantified using the scatter to primary radiation (SPR). The angular distribution of the intensity of the scattered radiation (sum of both the scattering effects) was simulated, showing that the ratio of scatter- to-primary radiation incident on the X-ray film is about 8.39% and 7.73% for the front and back screen, respectively, over the range from 0 to (pi) rad.

Citation Download Citation

Regina C. Barroso, Delson Braz, Marcelino J. Anjos, Ricardo Tadeu Lopes, and Carlos A. Castro "Scattered radiation from radiographic intensifying screen: a Monte Carlo simulation", Proc. SPIE 4508, Penetrating Radiation Systems and Applications III, (19 December 2001); https://doi.org/10.1117/12.450787

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