Dose distribution of secondary radiation in a water phantom for a proton pencil beam-EURADOS WG9 intercomparison exercise
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F18%3A00489292" target="_blank" >RIV/61389005:_____/18:00489292 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1088/1361-6560/aab469" target="_blank" >http://dx.doi.org/10.1088/1361-6560/aab469</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1361-6560/aab469" target="_blank" >10.1088/1361-6560/aab469</a>
Alternative languages
Result language
angličtina
Original language name
Dose distribution of secondary radiation in a water phantom for a proton pencil beam-EURADOS WG9 intercomparison exercise
Original language description
Systematic 3D mapping of out-of-field doses induced by a therapeutic proton pencil scanning beam in a 300 x 300 x 600 mm(3) water phantom was performed using a set of thermoluminescence detectors (TLDs): MTS-7 ((LiF)-Li-7:Mg, Ti), MTS-6 ((LiF)-Li-6:Mg, Ti), MTS-N ((LiF)-Li-nat:Mg, Ti) and TLD-700 ((LiF)-Li-7: Mg, Ti), radiophotoluminescent (RPL) detectors GD-352M and GD-302M, and polyallyldiglycol carbonate (PADC)-based (C12H18O7) track-etched detectors. Neutron and gamma-ray doses, as well as linear energy transfer distributions, were experimentally determined at 200 points within the phantom. In parallel, the Geant4 Monte Carlo code was applied to calculate neutron and gamma radiation spectra at the position of each detector. For the cubic proton target volume of 100 x 100 x 100 mm(3) (spread out Bragg peak with a modulation of 100 mm) the scattered photon doses along the main axis of the phantom perpendicular to the primary beam were approximately 0.5 mGy Gy(-1) at a distance of 100 mm and 0.02 mGy Gy(-1) at 300 mm from the center of the target. For the neutrons, the corresponding values of dose equivalent were found to be similar to 0.7 and similar to 0.06 mSv Gy(-1), respectively. The measured neutron doses were comparable with the out-offield neutron doses from a similar experiment with 20 MV x-rays, whereas photon doses for the scanning proton beam were up to three orders of magnitude lower.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
30224 - Radiology, nuclear medicine and medical imaging
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physics in Medicine and Biology
ISSN
0031-9155
e-ISSN
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Volume of the periodical
63
Issue of the periodical within the volume
8
Country of publishing house
GB - UNITED KINGDOM
Number of pages
13
Pages from-to
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UT code for WoS article
000430476400007
EID of the result in the Scopus database
2-s2.0-85046457369