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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20305 - Nuclear related engineering; (nuclear physics to be 1.3);

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Radiation Measurements

ISSN

1350-4487

e-ISSN

—

Svazek periodika

96

Číslo periodika v rámci svazku

JAN

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

11

Strana od-do

42-52

Kód UT WoS článku

000392887300005

EID výsledku v databázi Scopus

2-s2.0-85006758427