Different Methods of Measuring Neutron Dose/Fluence Generated During Radiation Therapy with Megavoltage Beams

Farhood, B. and Ghorbani, M. and Abdi Goushbolagh, N. and Najafi, M. and Geraily, G. (2020) Different Methods of Measuring Neutron Dose/Fluence Generated During Radiation Therapy with Megavoltage Beams. Health physics, 118 (1). pp. 65-74.

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Abstract

Medical linear accelerators (linacs) are the most frequently applied radiation therapy machines in the locoregional treatment of cancers by producing either high-energy electron or photon beams. However, with high-energy photons (>8 MeV), interaction of these photons with different high-Z nuclei of materials in components of the linac head unavoidably generates neutrons. On the other hand, the average energy of these generated neutrons has almost the highest radiation-weighting factor. Therefore, the produced neutrons should not be neglected. There are various tools for the measurement of neutron dose/fluence generated in a megavoltage linac, including thermoluminescent dosimeters, solid-state nuclear track detectors, bubble detectors, activation foils, Bonner sphere systems, and ionization chamber pairs. In this review article, each of the above-mentioned dosimetric methods will be described in detail.

Item Type: Article
Additional Information: cited By 0
Subjects: Medicine
Physics and Astronomy
Divisions: Faculty of Para medicine > Department of Management Radiology and Medical Physics
Depositing User: ART . editor
Date Deposited: 05 Jan 2020 12:05
Last Modified: 05 Jan 2020 12:05
URI: http://eprints.kaums.ac.ir/id/eprint/4371

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