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Evaluation of Photoneutron Energy Distribution in the Radiotherapy Room  

Park, Euntae (Dept. of Radiologic Science, Graduate School of Catholic University of Pusan)
Ko, Seongjin (Dept. of Radiologic Science, College of Health Sciences, Catholic University of Pusan)
Kim, Junghoon (Dept. of Radiologic Science, College of Health Sciences, Catholic University of Pusan)
Kang, Sesik (Dept. of Radiologic Science, College of Health Sciences, Catholic University of Pusan)
Publication Information
Journal of radiological science and technology / v.37, no.3, 2014 , pp. 223-231 More about this Journal
Abstract
Medical linear accelerator is widely used in radiation treatment field, and high energy photons, above 10 MV nominal accelerator voltage, are commonly utilized for the radiation treatment. However, these high energy photons lead the photo-nuclear reaction and the generation of photo-neutrons are accompanied. Thus, these problematic factors are issued in the view of radiation protection. Therefore, linear accelerator and radiation treatment room are simulated from MCNPX program in this study. The measurement points of interest are selected and analyzed, and the resulting effects derived from the properties of photo-neutron are evaluated. Therefore, we realized that the number of generating photo-neutrons was decreased by depending on the distance from the source. No matter what the nominal energy is set, the rates thermal neutrons to fast neutrons are marginal. It is founded that the amount of the thermal neutrons were decreased by depending on the distance from the source.
Keywords
Medical linear accelerator; Photonuclear reaction; Photoneutron; MCNPX;
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Times Cited By KSCI : 1  (Citation Analysis)
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