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http://dx.doi.org/10.17946/JRST.2017.40.2.16

A Study on the Photoneutron Dose Estimation in Flattening Filter Mode and Flattening Filter Free Mode for Medical Linear Accelerator  

Yang, Oh Nam (Department of Radiology, Mokpo Science University)
Lim, Cheong Hwan (Department of Radiological Science, Hanseo University)
Publication Information
Journal of radiological science and technology / v.40, no.2, 2017 , pp. 297-302 More about this Journal
Abstract
In this study, the generation of photoneutrons between the 10 MV FF mode and the FFF mode was evaluated and the amount of photoneutrons generated by the 10 MV and 15 MV energy changes in the FFF mode was evaluated. The generated neutrons were evaluated at 13 measurement points and the KTEPC was used to collect the generated neutrons. 10 MV FF mode was measured at 10 MV FF mode and FFF mode at all measurement points. In the superior direction, 0.455mSv and 0.152mSv were the largest, and more than 33% optical neutron was generated in FF. 10 MV in FFF mode, 15 MV in 15 MV, and 0.402 mSv in the direction of Superior, and 6.9% in the direction.
Keywords
Medical Linear Accelerator; Photoneutrons; Korea Tsssue Equivalent Proportional Counter(KTEPC); Flattening Filter;
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Times Cited By KSCI : 1  (Citation Analysis)
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1 Ing H, Nelson WR, Shore RA: Unwanted photon and neutron radiation resulting from collimated photon beams interacting with the body of radiotherapy patients, Med. Phys, 9(1), 27-33, 1982   DOI
2 Lakosi L.: Photoneutron interrogation of low-enriched uranium induced by bremsstrahlung from a 4MeV linac", Section B, Beam interactions with materia ls and atoms, Nuclear Instruments & methods in physics research. Vol.266, No.2, 295-300, 2008
3 Jung jae ho, Kim Hong Suk, Park Yoon Hwan, Lee Jae Ki: Evaluation of dose by photoneutron generated from medical linear accelerator, Proceedings of the Korean Radioactive Waste Society, 01, 296-296, 2004
4 McGinley P. H.: Photoneutron Production in the Primary Barriers of Medical Accelerator Rooms, Health physics, 62(4), 359-362,1992   DOI
5 Nath R, Epp ER, Laughlin JS, Swanson WP, Bond VP: Neutrons from high-energy X-ray medical accelerators: an estimate of risk to the radiotherapy patient, Medical Physics, 11(3), 231-241, 1984   DOI
6 Fatemeh Torabi, S. Farhad Masoudi, Faezeh Rahmani: Photoneutron production by a 25MeV electron linac for BNCT application, Annals of Nuclear Energy, 54, 192-196, 2013   DOI
7 Difilippo, F., Papiez, L., Moskvin, V., et al.: Contamination dose from photoneutron processes in bodily tissues during therapeutic radiation delivery, Medical physics, 30(10), 2849-2854, 2003   DOI
8 Eun-Tae Park: Evaluation of Photoneutron Dose in Radiotherapy Room Using MCNPX, The Journal of the Korea Contents Association, 15(6), 283-289, 2015   DOI
9 ICRP 74: Conversion coefficients for use I nradiological protection against external radiation, International Commission on Radiological Protection, ICRP Publication 74, 1996
10 ICRP 60: 1990 Recommendations of the Internaitonal Commission on Radiological Protection, Internaional Commission on Radiological Protectin, ICRP Publicaton 60, 1991
11 Radiation Protection & Safety : Chung-ku Publisher, 185, 2014
12 Cho Woong, Park Jeong-Hoon, Jung Won-Gyun Suh Tae-Suk: Development of a Beam Source Modeling Technique for a Flattening Filter Free (FFF) Beam, Machine Learning and Applications and Workshops, 10th International Conference,.2, 215-219, 2011
13 Chang Si-Young, Kim In-Gyoo: Developments in Radiation Health Science and Their Impact on Radiation Protection, Journal of radiation protection and research, 23(3), 185-196, 1998