Ep-1368 Evaluation of Neutron Dose in Central Axis Absorbed Dose in Linac Machines by Tld600 and Tld700 Dosimeters

Darestani, Hoda; Nedaie, Hassan Ali; Mohammadi, Khosro; Shahvar, A; Bayat, E.; Shahgholi, N.; Nazarnejad, M.

doi:10.1016/s0167-8140(12)71701-2

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“…Medical linear accelerators are the most widely used radiotherapy machines in locoregional treatment of various cancers by generating either high energy photon or electron beams [1]. High photon energies are preferred to enhance the treatment effectiveness and to decrease the skin dose in deeply-seated tumours.…”

Section: Introductionmentioning

confidence: 99%

Investigating in-field and out-of-field neutron contamination in high-energy medical linear accelerators based on the treatment factors of field size, depth, beam modifiers, and beam type

2015

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Section: Introductionmentioning

confidence: 99%

Investigating in-field and out-of-field neutron contamination in high-energy medical linear accelerators based on the treatment factors of field size, depth, beam modifiers, and beam type

2015

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Investigation of the effects of different composite materials on neutron contamination caused by medical LINAC / Untersuchung der Auswirkungen verschiedener Verbundmaterialien auf die Neutronenkontamination durch medizinische LINAC

Karaman¹,

Özdoğan²,

Üncü³

et al. 2020

Kerntechnik

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In a medical linear accelerator, the primary and secondary collimators are generally made of high atomic weight metals. The energy of the x-rays generated by accelerated electrons exceeds the bonding energies of high atomic number materials such as tungsten, and lead in the structure of the components in the accelerator head, it causes the production of neutron from the nucleus. Consequently, the resulting photo-neutrons can easily be scattered and spread into the treatment room. Thus, an additional neutron dose cannot be ignored in the tumor volume of the patient and in areas outside this volume. The contribution of the primary and secondary collimators to the neutron contamination is found to be approximately 52% and 30%, respectively. In this paper, the effects of using different composite materials such as Boron, Cadmium, and Polyethylene in secondary collimators on neutron contamination have been investigated by using Fluka Monte Carlo and TALYS 1.9 codes

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Ep-1368 Evaluation of Neutron Dose in Central Axis Absorbed Dose in Linac Machines by Tld600 and Tld700 Dosimeters

Cited by 2 publications

References 0 publications

Investigating in-field and out-of-field neutron contamination in high-energy medical linear accelerators based on the treatment factors of field size, depth, beam modifiers, and beam type

Investigating in-field and out-of-field neutron contamination in high-energy medical linear accelerators based on the treatment factors of field size, depth, beam modifiers, and beam type

Investigation of the effects of different composite materials on neutron contamination caused by medical LINAC / Untersuchung der Auswirkungen verschiedener Verbundmaterialien auf die Neutronenkontamination durch medizinische LINAC

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