Activation of QA devices and phantom materials under clinical scanning proton beams – a gamma spectrometry study

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F18%3A00321605" target="_blank" >RIV/68407700:21340/18:00321605 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1088/1361-6560/aac27f" target="_blank" >http://dx.doi.org/10.1088/1361-6560/aac27f</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1361-6560/aac27f" target="_blank" >10.1088/1361-6560/aac27f</a>

Result language

angličtina

Original language name

Activation of QA devices and phantom materials under clinical scanning proton beams – a gamma spectrometry study

Original language description

Activation of detectors and phantoms used for commissioning and quality assurance of clinical proton beams may lead to radiation protection issues. Good understanding of the activation nuclide vectors involved is necessary to assess radiation risk for the personnel working with these devices on a daily basis or to fulfill legal requirements regarding transport of radioactive material and its release to the public. Eleven devices and material samples were irradiated with a 220 MeV proton pencil beam (PBS, Proton Therapy Center, Prague). This study focuses on devices manufactured by IBA Dosimetry GmbH: MatriXX PT, PPC05, Stingray, Zebra, Lynx, a Blue Phantom rail and samples of RW3, PMMA, titanium, copper and carbon fibre plastic. Monitor Units (MU) were monitored during delivery. Gamma spectrometry was then performed for each item using a HPGe detector, with a focus on longer lived gamma emitting radionuclides. Activities were quantified for all found isotopes and compared to relevant legal limits for exemption and clearance of radioactive objects. Activation was found to be significant after long irradiation sessions, as done during commissioning of a proton therapy room. Some of the investigated devices may also cumulate activity in time, depending on the scenario of periodic irradiation in routine clinical practice. However, the levels of activity and resulting beta/gamma doses are more comparable to internationally recommended concentration limits for exemption than to dose limits for radiation workers. Results of this study will help to determine nuclide inventories required by some legal authorities for radiation protection purposes.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10304 - Nuclear physics

Project

—

Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2018

Confidentiality

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

Name of the periodical

Physics in Medicine and Biology

ISSN

0031-9155

e-ISSN

1361-6560

Volume of the periodical

63

Issue of the periodical within the volume

11

Country of publishing house

GB - UNITED KINGDOM

Number of pages

14

Pages from-to

—

UT code for WoS article

000434760000004

EID of the result in the Scopus database

2-s2.0-85048210905