[Does the measured dose change when applying the new DIN 6800-2 (2008) versus the edition from 1997?].
New edition of DIN 6800-2 (1997) has been published in March 2008. The concept of absorbed dose to water has been retained unchanged. In many points modern data and approaches were adopted to international dosimetry protocols. For the first time values for the pertubation correction factors of plane parallel chambers are given in a dosimetry protocol. This enables the customer based on a Co-60 calibration factor to measure absorbed dose to water without any cross-calibration. In this paper new edition will be presented and compared with the old one. But main focus is set on the question, is there any deviation in the determination of dose when applying both protocols to same measured values. For photon beams and for in Germany common used types of ionization chambers the deviations are not larger than about 0.3% and for other types not larger than 0.5%. However, in electron beams partly larger deviations up to 0.5% and for some types of ionization chambers even more than 1% may occur.
Christ
Gunter
G
Medizinische Physik, Universitätsklinik für Radioonkologie Tübingen. gunter.christ@med.uni-tuebingen.de
Dohm
Oliver Steffen
OS
Kapsch
Ralf-Peter
RP
D002138:Calibration; D003037:Cobalt Radioisotopes; D004583:Electrons; D005858:Germany; D017785:Photons; D011829:Radiation Dosage; D011839:Radiation, Ionizing; D011874:Radiometry / Q000379:methods*; D011879:Radiotherapy Dosage
D003037:Cobalt Radioisotopes