| Numéro |
2013
16th International Congress of Metrology
|
|
|---|---|---|
| Numéro d'article | 05006 | |
| Nombre de pages | 4 | |
| Section | Dosimétrie et Radiothérapie et Santé / Dosimetry and Radiotherapy & Health | |
| DOI | https://doi.org/10.1051/metrology/201305006 | |
| Publié en ligne | 7 octobre 2013 | |
Construction of a large graphite calorimeter for measurements in small fields used in radiotherapy
CEA, LIST, Laboratoire National Henri Becquerel (LNE-LNHB), 91191 Gif-sur-Yvette CEDEX, France
a Corresponding author: stephane.dufreneix@cea.fr
As the national metrology institute for ionization radiation the LNE-LNHB develops, maintains and transfers dosimetric references for high energy x-ray radiotherapy beams. Through the European project MetrexRT, a new approach has recently been developed to extend the dosimetric references to small fields (less than 2 cm wide). This method is based on the measurement of an absorbed dose on a surface larger than the beam. A new primary dosimeter (a graphite calorimeter) with a large surface has been built and characterized as well as a large surface ionization chamber. Both dosimeters can now be considered operational for measurements in small beams.
© Owned by the authors, published by EDP Sciences, 2013
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.