Performance tests and comparison of microdosimetric measurements with four tissue-equivalent proportional counters in scanning proton therapy

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F17%3A00473762" target="_blank" >RIV/61389005:_____/17:00473762 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.radmeas.2016.12.005" target="_blank" >http://dx.doi.org/10.1016/j.radmeas.2016.12.005</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.radmeas.2016.12.005" target="_blank" >10.1016/j.radmeas.2016.12.005</a>

Result language
angličtina
Original language name
Performance tests and comparison of microdosimetric measurements with four tissue-equivalent proportional counters in scanning proton therapy
Original language description
This paper compares the performance of four different Tissue-Equivalent proportional counters (TEPC) first in standard radiation fields, with gamma and neutron sources, then in the mixed and complex/intense neutron and photon stray radiation field of a scanning proton therapy facility. The paper focuses on the dead time correction and introduces a new spectra processing methodology to enable the comparison of the four TEPCs while accounting for their different gas filling and gain, lineal energy range of the spectrum and the analysis methodology. Measurements with Cs-137 and/or Co-60 gamma sources demonstrate variable low-LET threshold for each TEPC while data acquired with a Cf-252 neutron source show comparable response of the four TEPCs for high-LET particles. Meanwhile, in the scattered field of proton therapy, microdosimetric spectra measured at different positions and orientations around the patient show a majority of high-LET events at the smallest angle with respect to the beam axis while low LET particles were mainly dominant at 90 from the beam axis. The introduced processing methodology led to good overlapping of microdosimetric spectra for the four systems.
Czech name
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Czech description
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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
20305 - Nuclear related engineering; (nuclear physics to be 1.3);

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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