Jan Seuntjens and Simon Duane 2009 Metrologia 46 S39 doi:10.1088/0026-1394/46/2/S04
Jan Seuntjens1 and Simon Duane2
Show affiliationsIn this review the current status of absorbed dose to water standards for high-energy photon beams (60Co—50 MV nominal accelerating potential) is discussed. The review is focused on calorimeter-based absorbed dose standards for photon radiation therapy calibrations with typical dose rates of a few gray per minute. In addition, two alternative types of absorbed dose standards are also discussed. The overall uncertainty on measured dose to water in static reference fields is nowadays on the order of 0.4% to 0.5%. The components contributing to the uncertainty budgets are discussed. The discussed absorbed dose to water standards are expected to continue to have their place not only in the dissemination of absorbed dose to water but also in the determination of beam quality conversion factors essential in reference dosimetry in high-energy photon beams.
Issue 2 (April 2009)
Received 3 September 2008, in final form 13 February 2009
Published 20 March 2009
Jan Seuntjens and Simon Duane 2009 Metrologia 46 S39
Àlex Haro 1999 Nonlinearity 12 1299
C Markakis et al 2009 J. Phys.: Conf. Ser. 189 012024
John D Steele 2002 Class. Quantum Grav. 19 259
F A Gianturco and T Stoecklin 2001 J. Phys. B: At. Mol. Opt. Phys. 34 1695
Thomas H Court and Moritz von Rohr 1930 Trans. Opt. Soc. 32 113
Jan Ambjørn et al JHEP05(2000)023
A Balsamo et al 2006 Metrologia 43 396
Michel Brissaud 2006 J. Micromech. Microeng. 16 875
Zhao-hua Cheng et al 1995 J. Phys.: Condens. Matter 7 4707