Investigation of photoneutron dose equivalent from high-energy photons in radiotherapy

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Please use this identifier to cite or link to this item: http://nhuir.nhu.edu.tw/handle/987654321/26718

Title:	Investigation of photoneutron dose equivalent from high-energy photons in radiotherapy
Authors:	林群智;Lin, Chun-Chih;Lin, Jao-Perng;Liu, Wei-Chung
Contributors:	自然生物科技學系
Keywords:	Neutron;Photoneutron;Dose equivalent;Accelerator;Bubble detector;Radiotherapy
Date:	2007-05
Issue Date:	2019-01-04 11:14:14 (UTC+8)
Abstract:	Spatial distribution of photoneutron dose equivalent during radiotherapy at different beam size, depth, and distance from a 15 MV linear accelerator was investigated with bubble detectors in a water phantom. The photoneutron dose equivalent was mainly from fast neutrons, and decreased with distance at a fixed field and with depth. Besides, photoneutron dose equivalent was slightly affected by beam size due to the variation of tungsten area exposed in the beam direction and photoneutrons occurred at the jaws. Fast photoneutron dose equivalent of shallow critical organs was represented still considerably outside the beam size.
Relation:	Applied Radiation and Isotopes vol. 65, no. 5 pp.599-604
Appears in Collections:	[Department of Natural Biotechnology] Periodical Articles

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