1 Scope and object
1.1 Scope
This International Standard specifies the performance requirements of radiotherapy dosimeters , intended for the measurement of absorbed dose to water or air kerma (and their rates and spatial distributions) in photon , electron , proton or heavy ion radiation fields as used in radiotherapy .
The dose monitoring systems incorporated in radiotherapy treatment machines are not covered by this standard , neither are the re-entrant ionization chambers used for brachytherapy source calibration and constancy check devices.
This standard is applicable to the following types of dosimeter:
a) field-class dosimeters normally used for