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Ionizing radiation dosimetry for radiotherapy

EURAMET / EMPIR research project (2017 - 2019)

The aim of this Joint Research Project (JRP) is to contribute to the update of the IAEA TRS-398 Code of Practice for dosimetry in radiation therapy of cancer. The proposed JRP was prepared in response to the Selected Research Topic SRT-n03 of the EMPIR 2016 co-normative call.

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WP 1: kQ-factors for kV x-ray beams between 100 kV and 250 kV

Objective: (i) to measure kQ,Q0 factors for at least 4 types of ionisation chambers and at least 8 beam qualities, ensuring direct traceability of the kQ,Q0 factors to primary standards of absorbed dose to water; (ii) to calculate kQ,Q0 factors for these beams using validated Monte Carlo codes; (iii) to compare the measured and calculated kQ,Q0 factors for kV x-ray beams, and to provide IAEA with a consistent dataset of kQ,Q0 factors with target standard uncertainties better than 1.0 %.

WP 2: High-energy (MV) photon beams between 4 MV and 20 MV, including flattening filter free beams (FFF).

Objectives: (i) to measure kQ,Q0 factors for at least 8 types of ionisation chambers and a range of beam qualities, ensuring direct traceability of the kQ,Q0 factors to primary standards of absorbed dose to water; (ii) to calculate kQ,Q0 factors for these beams using several Monte Carlo codes; (iii) to compare the measured and calculated kQ,Q0 factors for high-energy (MV) photon beams, and to provide IAEA with a consistent new dataset of kQ,Q0 factors with target standard uncertainties better than 0.7 %.

WP2

WP 3: Scanned proton beams between 60 MeV and 250 MeV.

Objectives: (i) to measure kQ,Q0 factors for at least 4 types of ionisation chambers and a range of beam qualities, ensuring direct traceability of the kQ,Q0 factors to primary standards of absorbed dose to water; (ii) to calculate kQ,Q0 factors for these beams using validated Monte Carlo codes; (iii) to compare the measured and calculated kQ,Q0 factors for scanned proton beams, and to provide IAEA with a consistent dataset of kQ,Q0 factors with target standard uncertainties better than 2.0 %.

WP3

Project info

Web site for the EMPIR project: “kQ factors in modern external beam radiotherapy applications to update IAEA TRS-398"

Web address: RTnorm.eu

Project start: May 1, 2017

Project end: October 31, 2019

Duration: 30 months

Coordinator; Massimo Pinto, ENEA

Partners:

ENEA, CEA, DTU, NPL, STUK, VSL, IST-ID, KU Leuven, FCRB and THM.

Technical work packages:

WP 1: Determination of kQ,Q0 factors for kV X-rays

WP 2: Determination of kQ,Q0 factors for high energy (MV) photon beams

WP 3: Determination of kQ,Q0 factors for scanned proton beams

This project is carried out within the framework of EURAMET/EU's European Metrology Programme for Innovation and Research (EMPIR).