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Neutron dose rate evaluation for medical linear accelerators

Neutron dose rate evaluation for medical linear accelerators During X-ray therapeutic irradiation with energies above the threshold of (X,n) reactions in the structural materials of medical accelerators, a photoneutron fluence is generated. In Brazil, no measurements of neutron doses in radiotherapy rooms are being done yet, when licensing these equipment. Consequently, it is very important to obtain accurate analytical formulae and/or simulation of these dose rates, in order to estimate the increase in dose received by the patient and staff, as well as to correctly project the additional shielding for the treatment room. In this work, we present MCNP simulation of dosimetric quantities at the isocentre of some models of high-energy linear accelerators, and compare it with the values given by the manufacturers, finding good agreement between both. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Radiation Protection Dosimetry Oxford University Press

Neutron dose rate evaluation for medical linear accelerators

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Publisher
Oxford University Press
Copyright
Radiation Protection Dosimetry Vol. 111, No. 1 © Oxford University Press 2004; all rights reserved
ISSN
0144-8420
eISSN
1742-3406
DOI
10.1093/rpd/nch369
pmid
15367778
Publisher site
See Article on Publisher Site

Abstract

During X-ray therapeutic irradiation with energies above the threshold of (X,n) reactions in the structural materials of medical accelerators, a photoneutron fluence is generated. In Brazil, no measurements of neutron doses in radiotherapy rooms are being done yet, when licensing these equipment. Consequently, it is very important to obtain accurate analytical formulae and/or simulation of these dose rates, in order to estimate the increase in dose received by the patient and staff, as well as to correctly project the additional shielding for the treatment room. In this work, we present MCNP simulation of dosimetric quantities at the isocentre of some models of high-energy linear accelerators, and compare it with the values given by the manufacturers, finding good agreement between both.

Journal

Radiation Protection DosimetryOxford University Press

Published: Aug 1, 2004

There are no references for this article.