Absorbed dose to water references for radiotherapy medium energy X-rays through water calorimetry at LNE-LNHB

Introduction: Currently, the references for medium energy radiotherapy X-rays beams are established in terms of air kerma. Absorbed dose to water, which is the quantity of interest, is achieved via transfer dosimetric techniques in accordance with international protocols. The use of water calorimetry enables benefiting, through primary measurements of absorbed dose to water, of a direct and more reliable reference with a reduced uncertainty.