Browse > Article
http://dx.doi.org/10.7742/jksr.2016.10.6.427

Evaluation of Photon and Photoneutron Using High Energy X-ray in Radiation Therapy Room  

Park, Eun-Tae (Department of Radiation Oncology, Busan Paik Hospital, Inje University)
Publication Information
Journal of the Korean Society of Radiology / v.10, no.6, 2016 , pp. 427-433 More about this Journal
Abstract
Recently increased use of high energy x-ray in radiation therapy, so therapeutic efficiency of tumors that located deep part also increased. However, photoneutron is problem which is generated caused by photoneuclear reaction. Photoneutron is continually required management because of that is more harmful than photon. In this regard, the study utilizing simulation of the Monte Carlo method is actively progress about photoneutron but measure is deficient. So this study was analyzed the correlation between the measured photon and photoneutron by radiation measurement device. As a result, photons were reduced when distance is farther and field size is smaller. But photoneutron were increased when field size is smaller and increased to a certain distance then reduced.
Keywords
Photoneuclear reaction; Photoneutron; Photon;
Citations & Related Records
Times Cited By KSCI : 9  (Citation Analysis)
연도 인용수 순위
1 L. donadille, F. Trompier, I. robbes, S. Derreumaux, J. Mantione, B. Asselineau, K. Amgarou, A. Martin, J. F. Bottollier-Depois, F. Queinnec, B. Aubert, I. Clairand, “Radiation protection of workers associated with secondary neutrons produced by medical linear accelerators,” Radiation Measurements, Vol. 43, No. 2-6, pp. 939-943, 2008.   DOI
2 Y. S. Park, H. T. KIM, S. J. Ko, S. S. Lee, Radiobiology 2nd edition, Jeongmungak, Seoul, 2012.
3 ICRP, The 2007 Recommendations of the Internation al Commission on Radiological Protection, ICRP Publication 103, 2007.
4 AAPM, Neutron Measurements Around High Energy X-ray Radiotherapy Machines, AAPM Report No. 19, 1987
5 NCRP, Neutron Contamination from Medical Electron Accelerators, NCRP Report No. 79, 1984
6 Nuclear Safety and Security Commission, Nuclear Safety Act, 2014
7 S. S. Chu, C. O. Suh, G. E. Kim, “Shielding for Critical Organs and Radiation Exposure Dose Distribution in Patients with High Energy Radiotherapy,” Journal of Radiation Protection and Research, Vol. 27, No. 1, pp. 1-10, 2002.
8 S. K. Choi, “Change of the Scattered Dose by Field Size in X-ray Radiation,” The Journal of the Korea Contents Association, Vol. 13, No. 3, pp. 198-203, 2013.
9 S. K. Choi, “Relationship between the Distribution of Space doses in X-ray Rooms and the "Inverse Square Law of Distance,” The Journal of the Korea Contents Association, Vol. 13, No. 8, pp. 301-307, 2013.   DOI
10 S. S. Kang, I. H. Go, G. J. Kim, S. H. Kim, Y. S, Kim, Radiation Therapeutics 3rd edition, Cheong-gumunhwasa, Seoul, 2014.
11 N. Mohammadi, S. H. Miri-Hakimabad, L. Rafat-Motavalli, “A Monte Carlo Study for Photoneutron Dose Estimations around the High-Energy Linacs,” Jounal of Biomedical Physics & Engineering, Vol. 4, No. 4, pp. 127-140, 2014.
12 J. S. Lee, J. N. Kim, “Efficient Data Acquisition Technique for Clinical Application of Multileaf Collimator,” The Journal of the Korea Contents Association, Vol. 8, No. 11, pp. 182-188, 2008.   DOI
13 E. T. Park, D. H. Lee, S. S. Kang, “Evaluation of Photoneutron by Hypofractionated Radiotherapy,” The Journal of the Korea Contents Association, Vol. 15, No. 12, pp. 347-354, 2015.
14 E. T. Park, D. Y. Lee, S. J. Ko, J. H. Kim, S. S. Kang, “A Study on Photon Spectrum in Medical Linear Accelerator Based on MCNPX,” Jounal of the Korean Society Radiology, Vol. 8, No. 5, pp. 249-254, 2014.   DOI
15 O. N. Yang, C. H. Lim, “Study on the Photoneutrons Produced in 15 MV Medical Linear Accelerators : Comparison of Three-Dimensional Conformal Radiotherapy and Intensity-Modulated Radiotherapy,” Journal of Radiological Science and Technology, Vol. 35, No. 4, pp. 335-343, 2012.
16 J. O. Lee, D. H. Jeong, J. K. Kang, “Neutron Generation from a 24 MV Medical Linac,” Korean Journal of Medical Physics, Vol. 16, No. 2, pp. 97-103, 2005.
17 E. T. Park, S. J. Jin, C. W. Park, "Evaluation of Photoneutron During Radiation Therapy when Using Flattening Filter and Tracking Jaw with High Energy X-ray," Journal of the Korean Society of Radiology, Vol. 10, pp. 125-131, 2016.   DOI
18 E. T. Park, S. J. Ko, J. H. Kim, 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.
19 A Ghasemi, T. Allahverdi Pourfallah, M. R. Akbari, H. Babapour, M. Shahidi, “Photo neutron dose equivalent rate in 15 MV X-ray beam from a Siemens Primus Linac,” Jounal of Medical Physics, Vol. 40, No. 2, pp. 90-94, 2016.