Determination of small field synthetic single-crystal diamond detector correction factors for CyberKnife, Leksell Gamma Knife Perfexion and linear accelerator

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00023884%3A_____%2F12%3A00007297" target="_blank" >RIV/00023884:_____/12:00007297 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21340/17:00317274 RIV/00064203:_____/17:10373461 RIV/86652052:_____/17:N0000067

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.ejmp.2017.11.010" target="_blank" >http://dx.doi.org/10.1016/j.ejmp.2017.11.010</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ejmp.2017.11.010" target="_blank" >10.1016/j.ejmp.2017.11.010</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Determination of small field synthetic single-crystal diamond detector correction factors for CyberKnife, Leksell Gamma Knife Perfexion and linear accelerator

Popis výsledku v původním jazyce

Purpose: The aim of this study was to determine small field correction factors for a synthetic single-crystal diamond detector (PTW microDiamond) for routine use in clinical dosimetric measurements. Materials and methods: Correction factors following small field Alfonso formalism were calculated by comparison of PTW microDiamond measured ratio MQclin/M fclin Qmsr fmsr with Monte Carlo (MC) based field output factors ΩQclin Qmsr fclin fmsr , , determined using Dosimetry Diode E or with MC simulation itself. Diode measurements were used for the CyberKnife and Varian Clinac 2100C/D linear accelerator. PTW microDiamond correction factors for Leksell Gamma Knife (LGK) were derived using MC simulated reference values from the manufacturer. Results: PTW microDiamond correction factors for CyberKnife field sizes 25–5mm were mostly smaller than 1% (except for 2.9% for 5mm Iris field and 1.4% for 7.5mm fixed cone field). The correction of 0.1% and 2.0% for 8mm and 4mm collimators, respectively, needed to be applied to PTW microDiamond measurements for LGK Perfexion. Finally, PTW microDiamond MQclin/M fclin Qmsr fmsr for the linear accelerator varied from MC corrected Dosimetry Diode data by less than 0.5% (except for 1×1 cm2 field size with 1.3% deviation). Conclusions: Regarding low resulting correction factor values, the PTW microDiamond detector may be considered an almost ideal tool for relative small field dosimetry in a large variety of stereotactic and radiosurgery treatment devices.

Název v anglickém jazyce

Determination of small field synthetic single-crystal diamond detector correction factors for CyberKnife, Leksell Gamma Knife Perfexion and linear accelerator

Popis výsledku anglicky

Purpose: The aim of this study was to determine small field correction factors for a synthetic single-crystal diamond detector (PTW microDiamond) for routine use in clinical dosimetric measurements. Materials and methods: Correction factors following small field Alfonso formalism were calculated by comparison of PTW microDiamond measured ratio MQclin/M fclin Qmsr fmsr with Monte Carlo (MC) based field output factors ΩQclin Qmsr fclin fmsr , , determined using Dosimetry Diode E or with MC simulation itself. Diode measurements were used for the CyberKnife and Varian Clinac 2100C/D linear accelerator. PTW microDiamond correction factors for Leksell Gamma Knife (LGK) were derived using MC simulated reference values from the manufacturer. Results: PTW microDiamond correction factors for CyberKnife field sizes 25–5mm were mostly smaller than 1% (except for 2.9% for 5mm Iris field and 1.4% for 7.5mm fixed cone field). The correction of 0.1% and 2.0% for 8mm and 4mm collimators, respectively, needed to be applied to PTW microDiamond measurements for LGK Perfexion. Finally, PTW microDiamond MQclin/M fclin Qmsr fmsr for the linear accelerator varied from MC corrected Dosimetry Diode data by less than 0.5% (except for 1×1 cm2 field size with 1.3% deviation). Conclusions: Regarding low resulting correction factor values, the PTW microDiamond detector may be considered an almost ideal tool for relative small field dosimetry in a large variety of stereotactic and radiosurgery treatment devices.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20601 - Medical engineering

Projekt

—

Návaznosti

N - Vyzkumna aktivita podporovana z neverejnych zdroju

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Physica Medica: European Journal of Medical Physics

ISSN

1120-1797

e-ISSN

—

Svazek periodika

44

Číslo periodika v rámci svazku

December

Stát vydavatele periodika

IT - Italská republika

Počet stran výsledku

6

Strana od-do

66-71

Kód UT WoS článku

000418099300009

EID výsledku v databázi Scopus

2-s2.0-85038241218