Browse > Article
http://dx.doi.org/10.7742/jksr.2014.8.5.249

A Study on Photon Spectrum in Medical Linear Accelerator Based on MCNPX  

Park, Euntae (Department of Radiological Science, College of Health Sciences, Catholic University of Pusan)
Lee, Dongyeon (Department of Radiological Science, College of Health Sciences, Catholic University of Pusan)
Ko, Seongjin (Department of Radiological Science, College of Health Sciences, Catholic University of Pusan)
Kim, Junghoon (Department of Radiological Science, College of Health Sciences, Catholic University of Pusan)
Kang, Sesik (Department of Radiological Science, College of Health Sciences, Catholic University of Pusan)
Publication Information
Journal of the Korean Society of Radiology / v.8, no.5, 2014 , pp. 249-254 More about this Journal
Abstract
Medical linear accelerator is used for radiotherapy since it was developed in 1952, the utilization rate is further increased. It is used high energy radiotherapy using the energy of the photon of 6 MeV or more is universal at present, but the creation of the neutron by photonuclear reaction cause a problem that is radiation exposure of patients and operators. Therefore, in this study, to analyze the spectrum of the photon beam of 6 to 24 MV that occurred in the medical linear accelerator using the Monte Carlo code MCNPX, the number of photons of 7.41 MeV or more, which is a neutron production threshold energy of tungsten and average energy. The result of 24 MV in the beginning and the 8 MV was 0.59% of the total number of detected photons and it was founded that the number of photons are increased which are possible to cause the photonuclear reaction.
Keywords
Medical linear accelerator; Photonuclear reaction; MCNPX; Threshold energy;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 Kang SK, Ahn SH, Kim CY, " A Study on Photon Dose Calculation in 6 MV Linear Accelerator Based on Monte Carlo Method", Journal of Radiological Science and Technology, Vol. 34, No. 1, pp.43-50, 2011.   과학기술학회마을
2 Kawrakow I. "Accurate condensed history Monte Carlo simulation of electron transport. I. EGSnrc, the new EGS4 version", Med. Phys., Vol.27, No. 3, pp.485-498, 2000.   DOI   ScienceOn
3 Sheikh-Bagheri, D., Rogers, D. W. O., "Monte Carlo calculation of nine megavoltage photon beam spectra using the BEAM code", Medical physics, Vol. 29, No. 3, pp.391-402, 2002.   DOI   ScienceOn
4 Lee JO, Jeong DH, Kang JK, "Neutron Generation from a 24 MV Medical Linac", Korean J Med Phys., Vol. 16, No. 2, pp.97-103, 2005.   과학기술학회마을
5 Clifford Dugal, B.Eng., "Application of Monte Carlo to Linac Bunker Shielding Design", Ottawa Carleton Institute for Physics Department of Physics, Carleton University, 2006.
6 Kang SS, Go IH, Kim GJ, Kim SH, Kim YS, Kim YJ et al, " Radiation Therapeutics: 3rd edition," Cheong-gu munhwasa, Korea, 2014.
7 F. M. KHAN , "The Physics Of Radiation Therapy 4/E", Lippincott Williams & Wilkins, 2009.
8 W.L. Huang , Q.F. Li , 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, Issues 3, pp.339-347, 2005.   DOI   ScienceOn
9 Kim KT, Kang SS, Noh SC, Jung BJ, Cho CH, Heo YJ, Park JK, "Absorbed Spectrum Comparison of Lead and Tungsten in Continuous X-ray Energy using Monte Carlo Simulation", Journal of the Korean Society of Radiology, Vol. 6, No. 6, pp.483-487, 2012.   과학기술학회마을   DOI   ScienceOn
10 Kim YH, "Dose Distribution Calculation Using MCNPX code in the Gamma-ray Irradiation Cell", Department of Nuclear & Energy Engineering Graduate School, Cheju National University, 2008.
11 Ma CM, Li JS, Pawlicki T, Jiang SB, Deng J, Lee MC, Koumrian T, Luxton M and Brain S. "A Monte Carlo dose calculation tool for radiotherapy treatment planning", Phys. Med. Biol., Vol. 47, No.10, pp.1671-1689, 2002.   DOI   ScienceOn
12 Keall PJ, Siebers JV, Arnfield M, Kim JO and Mohan R "Monte Carlo dose calculations for dynamic IMRT treatments", Phys. Med. Biol., Vol. 46, No. 4, pp.929-941, 2001.   DOI   ScienceOn
13 Pelowitz, Denise B., "$MCNPX^{TM-}$User's manual version 2.5.0", Los Alamos National Laboratory, 2005.