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http://dx.doi.org/10.5392/JKCA.2015.15.06.283

Evaluation of Photoneutron Dose in Radiotherapy Room Using MCNPX  

Park, Eun-Tae (인제대학교 부산백병원 방사선종양학과)
Publication Information
The Journal of the Korea Contents Association / v.15, no.6, 2015 , pp. 283-289 More about this Journal
Abstract
Recently, high energy photon radiotherapy is a growing trend for increasing therapy results. Commonly, if you use high energy photons above 6~8 MeV nominal accelerator voltage, It lead the photo-nuclear reaction and the generation of photo-neutron are accompanied and these problematic factors are issued in the view of radiation protection. Therefore, in this study analyzed for dose distribution of photo-neutron in radiotherapy room based on MCNPX. As a result, absorbed dose is increased sharply from 10 MV to 12 MV. It was founded that the rapid increasement of photoneutron fluence was related to the absorbed dose at above 10 MV. Also, in case of the recommendation of ICRP 103, the outcome of an exchanged equivalent dose which based on calculated an absorbed dose, showed lower equivalent dose than ICRP 60 by reflecting the contribution of secondary photon for absorbed dose of human body in the low energy band.
Keywords
Radiotherapy; Photo-nuclear Reaction; MCNPX; Absorbed Dose; Equivalent Dose;
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Times Cited By KSCI : 3  (Citation Analysis)
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1 J. Thariat, J. M. Hannoun-Levi, A. Sun Myint, T. Vuong, and J. P. Gerard, "Past, present, and future of radiotherapy for the benefit of patients," Nature Reviews Clinical Oncology, Vol.10, No.1, pp.52-60, 2012.   DOI   ScienceOn
2 S. S. Kang, I. H. Go, G. J. Kim, S. J. Lee, Y. S. JI, and J. U. Choi, Radiation Therapeutics 3rd edition, Cheong-gu munhwasa, 2014.
3 S. Zabihinpoor and M. Hasheminia, "Calculation of Neutron Contamination from Medical Linear Accelerator in Treatment Room," Adv. Studies Theor. Phys., Vol.5, No.9, pp.421-428, 2011.
4 NCRP, Neutron Contamination from Medical Electron Accelerator(NCRP Report No. 79), National Council on Radiation Protection and Measurements, Bethesda, Maryland, 1984.
5 F. M. KHAN, The Physics Of Radiation Therapy 4/E, Lippincott Williams & Wilkins, 2009.
6 W. L. Huang, Q. F. Li, and Y. Z. Lin, "Calculation of photoneutrons produced in the targets of electron linear accelerators radiography and radiotherapy applications," Nuclear Instruments and Methods in Physics Raesearch B, Vol.229, No.3, pp.339-347, 2005.   DOI   ScienceOn
7 Y. S. Park, H. T. KIM, S. J. Ko, and S. S. Lee, Radiobiology 2nd edition, Jeongmungak, 2012.
8 ICRP, The 2007 Recommendations of the International Commission on Radiological Protection, ICRP Publication 103, 2007.
9 E. T. Park, D. Y. Lee, S. J. Ko, J. H. Kim, and S. S. Kang, "A Study on Photon Spectrum in Medical Linear Accelerator Based on MCNPX," Journal of the Korean Society of Radiology, Vol.8, No.5, pp.249-254, 2014.   DOI   ScienceOn
10 J. S. Lee, "Dose Evaluation Using Mathematical Simulation of Radiation Exposure Body in Mammography System," Journal of the Korean Society of Radiology, Vol.8, No.4, pp.155-161, 2014.   DOI   ScienceOn
11 E. T. Park, S. J. Ko, J. H. Kim, and S. S. Kang, "Evaluation of Photoneutron Energy Distribution in the Radiotherapy Room," Journal of Radiological Science and Technology, Vol.37, No.3, pp.223-231, 2014.
12 T. Rauscher and F. K. Thielemann, "Predicted cross-sections for photon induces particle emission," Atomic Data and Nuclear Data Tables, Vol.88, pp.1-74, 2004.   DOI   ScienceOn
13 S. S. Dietrich and B. L. Berman, "Atlas of photoneutron cross sections obtained with monoenergetic photons," Atom. Data. Nuc. Data. Tab., Vol.38, pp.199-338, 1988.   DOI
14 H. S. Kim, New Empirical Formula for Neutron Dose Level at the Maze of Medical Linear Accelerator Facilities, Nuclear Engineering in Hanyang University, 2007.
15 ICRP, 1991b., The 1990 Recommendations of the International Commission on Radiological Protection, ICRP Publication 60, 1991.