70 – Measuring absorbed dose to water in medium energy x-ray beams–traceability to the primary standards available in Europe and future dosimetry protocols

Introduction: While radiotherapy dosimetry is traceable to absorbed dose to water (Dw) primary standards in high-energy photon, electron, proton, and ion beams, this is not the case for other radiotherapy modalities, including low- and medium-energy x-rays. Activities within workpackage 1 (WP1) of the EMRP HLT09 project “MetrExtRT” have been outlined to fill this gap for medium-energies with reference conditions as in the IAEA 398 protocol.