A multinational audit of small field output factors calculated by treatment planning systems used in radiotherapy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F86652052%3A_____%2F18%3AN0000012" target="_blank" >RIV/86652052:_____/18:N0000012 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.phiro.science/article/S2405-6316(17)30048-9/pdf" target="_blank" >https://www.phiro.science/article/S2405-6316(17)30048-9/pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.phro.2018.02.005" target="_blank" >10.1016/j.phro.2018.02.005</a>

Jazyk výsledku

angličtina

Název v původním jazyce

A multinational audit of small field output factors calculated by treatment planning systems used in radiotherapy

Popis výsledku v původním jazyce

The purpose was to test an audit methodology for verifying the implementation of output factors (OFs) of small fields in treatment planning systems (TPSs) used in radiotherapy. The methodology was developed and tested through a multinational research group and performed on a national level in five different countries. Centres participating in this study were asked to provide OFs calculated by their TPSs for 10×10 cm2, 6×6cm2, 4×4cm2, 3×3cm2 and 2×2cm2 field sizes using an SSD of 100 cm. The ratio of these calculated OFs to reference OFs was analysed. The action limit was ±3% for the 2×2 cm2 field and ±2% for all other fields. OFs for more than 200 different beams were collected in total. On average, the OFs for small fields calculated by TPSs were generally larger than measured reference data. These deviations increased with decreasing field size. On a national level, 30% and 31% of the calculated OFs of the 2×2 cm2 field exceeded the action limit of 3% for nominal beam energies of 6 MV and for nominal beam energies higher than 6 MV, respectively. Modern TPS beam models generally overestimate the OFs for small fields. The verification of calculated small field OFs is a vital step and should be included when commissioning a TPS. The methodology outlined in this study can be used to identify potential discrepancies in clinical beam models.

Název v anglickém jazyce

A multinational audit of small field output factors calculated by treatment planning systems used in radiotherapy

Popis výsledku anglicky

The purpose was to test an audit methodology for verifying the implementation of output factors (OFs) of small fields in treatment planning systems (TPSs) used in radiotherapy. The methodology was developed and tested through a multinational research group and performed on a national level in five different countries. Centres participating in this study were asked to provide OFs calculated by their TPSs for 10×10 cm2, 6×6cm2, 4×4cm2, 3×3cm2 and 2×2cm2 field sizes using an SSD of 100 cm. The ratio of these calculated OFs to reference OFs was analysed. The action limit was ±3% for the 2×2 cm2 field and ±2% for all other fields. OFs for more than 200 different beams were collected in total. On average, the OFs for small fields calculated by TPSs were generally larger than measured reference data. These deviations increased with decreasing field size. On a national level, 30% and 31% of the calculated OFs of the 2×2 cm2 field exceeded the action limit of 3% for nominal beam energies of 6 MV and for nominal beam energies higher than 6 MV, respectively. Modern TPS beam models generally overestimate the OFs for small fields. The verification of calculated small field OFs is a vital step and should be included when commissioning a TPS. The methodology outlined in this study can be used to identify potential discrepancies in clinical beam models.

Druh

J_ost - Ostatní články v recenzovaných periodicích

CEP obor

—

OECD FORD obor

20601 - Medical engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Physics and Imaging in Radiation Oncology

ISSN

2405-6316

e-ISSN

—

Svazek periodika

5

Číslo periodika v rámci svazku

January

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

6

Strana od-do

58-63

Kód UT WoS článku

—

EID výsledku v databázi Scopus

—