Dose estimation of the neutrons induced by the high energy medical linear accelerator using dual-TLD chips

This paper discussed the neutron doses induced by the high energy medical linear accelerator (Linac). Thermoluminescent dosimeter (TLD) pairs are usually chosen to distinguish the doses of neutrons from photons in mixed radiation field. In this work, TLD-600 and TLD-700 chips were used to investigat...

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Bibliographic Details
Published in:Radiation measurements 2010-03, Vol.45 (3), p.739-741
Main Authors: Hsu, Fang-Yuh, Chang, Ya-Ling, Liu, Mu-Tai, Huang, Sheng-Shien, Yu, Cheng-Ching
Format: Article
Language:English
Subjects:
Earth sciences
Earth, ocean, space
Exact sciences and technology
Geochronology
Isotope geochemistry. Geochronology
Linear accelerator
Neutron dose
Rando phantom
TLD
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Summary:This paper discussed the neutron doses induced by the high energy medical linear accelerator (Linac). Thermoluminescent dosimeter (TLD) pairs are usually chosen to distinguish the doses of neutrons from photons in mixed radiation field. In this work, TLD-600 and TLD-700 chips were used to investigate the dose contributions of neutrons induced by 15 MV photon beam of the medical Linac used in radiotherapy. A Rando phantom filled with these dual-TLD chips was irradiated in the 15 MV photon beam to assess the doses contribution of the induced neutrons. Besides, dual-TLD chips were also placed in the treatment room to estimate the spatial dose distribution of neutrons. In the results, dose contributions of neutrons in phantom are less than 0.1% compared with the maximum dose of photons. The dose distribution of neutrons in the treatment room was also revealed.
ISSN:1350-4487
1879-0925
DOI:10.1016/j.radmeas.2010.02.010