Deliverable D6: Good Practice Guide on the characterisation and calibration of detectors for 3D dose distribution measurements close to eBT devices. This will include guidance to achieve the following target uncertainties (k = 1): 1 % - 2 % (NMIs) and 2 % - 3 % (clinic) for the scintillation detectors and for the small volume ionisation chambers, 3.5 % for the gel dosimeter (considering a dose around 20 Gy) and 2.5 % for the alanine pellets.

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00177016%3A_____%2F23%3AN0000085" target="_blank" >RIV/00177016:_____/23:N0000085 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Deliverable D6: Good Practice Guide on the characterisation and calibration of detectors for 3D dose distribution measurements close to eBT devices. This will include guidance to achieve the following target uncertainties (k = 1): 1 % - 2 % (NMIs) and 2 % - 3 % (clinic) for the scintillation detectors and for the small volume ionisation chambers, 3.5 % for the gel dosimeter (considering a dose around 20 Gy) and 2.5 % for the alanine pellets.

Popis výsledku v původním jazyce

Currently, most commercial electronic brachytherapy (eBT) low energy X-ray systems rely on specific calibration tools and procedures to verify the absorbed dose to water close to the eBT sources. It is therefore difficult to adopt clinically established treatment plans from one eBT system to another, which impedes progress in this modality of radiotherapy. This Good Practice Guide (GPG) summarises the characterisation and calibration of different radiation detectors within the framework of the EMPIR project PRISM-eBT. The dosimeters investigated in this project were all small enough to be used as point detectors in steep dose gradients close to eBT sources. A thorough characterisation of the dosimeters required the measurement of different properties, for example the energy response as a function of X-ray energies in the low keV energy range typical for eBT applications, as well as any dose, dose rate or angular dependence. Once calibrated, the dosimeters can be used to determine the 3D dose distributions in water within a few centimetres from bare eBT sources or the surfaces of typical eBT applicators. The results summarised in this GPG can form the basis to develop a standardised traceable calibration procedure for these detectors with the aim to reduce the uncertainties in dose, dose distribution and dose-effect relations to a level recommended, for instance, in the International Atomic Energy Agency (IAEA) Human Health Report No. 31 (IAEA 2016).

Název v anglickém jazyce

Deliverable D6: Good Practice Guide on the characterisation and calibration of detectors for 3D dose distribution measurements close to eBT devices. This will include guidance to achieve the following target uncertainties (k = 1): 1 % - 2 % (NMIs) and 2 % - 3 % (clinic) for the scintillation detectors and for the small volume ionisation chambers, 3.5 % for the gel dosimeter (considering a dose around 20 Gy) and 2.5 % for the alanine pellets.

Popis výsledku anglicky

Currently, most commercial electronic brachytherapy (eBT) low energy X-ray systems rely on specific calibration tools and procedures to verify the absorbed dose to water close to the eBT sources. It is therefore difficult to adopt clinically established treatment plans from one eBT system to another, which impedes progress in this modality of radiotherapy. This Good Practice Guide (GPG) summarises the characterisation and calibration of different radiation detectors within the framework of the EMPIR project PRISM-eBT. The dosimeters investigated in this project were all small enough to be used as point detectors in steep dose gradients close to eBT sources. A thorough characterisation of the dosimeters required the measurement of different properties, for example the energy response as a function of X-ray energies in the low keV energy range typical for eBT applications, as well as any dose, dose rate or angular dependence. Once calibrated, the dosimeters can be used to determine the 3D dose distributions in water within a few centimetres from bare eBT sources or the surfaces of typical eBT applicators. The results summarised in this GPG can form the basis to develop a standardised traceable calibration procedure for these detectors with the aim to reduce the uncertainties in dose, dose distribution and dose-effect relations to a level recommended, for instance, in the International Atomic Energy Agency (IAEA) Human Health Report No. 31 (IAEA 2016).

Druh

V_souhrn - Souhrnná výzkumná zpráva

CEP obor

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OECD FORD obor

10304 - Nuclear physics

Projekt

<a href="/cs/project/8B19003" target="_blank" >8B19003: Primary standards and traceable measurement methods for X-ray emitting electronic brachytherapy devices</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Počet stran výsledku

42

Místo vydání

PTB Branschweig, Německo

Název nakladatele resp. objednatele

EURAMET

Verze

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