IEC 60731:2011+A1:2016 specifies the performance requirements of radiotherapy dosimeters, intended for the measurement of absorbeddose to water or air kerma (and their rates and spatial distributions) in photon, electron, proton or heavy ion radiationfields 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. IEC 60731:2011 is applicable to the following types of dosimeter:
a) field-class dosimeters normally used for
1) in vivo skin surface or intracavitary measurements of dose onpatients.
2) in vivo skin surface or intracavitary measurements of dose onpatients.
b) reference-class dosimeters normally used for the calibration offield-class dosimeters;
c) scanning-class dosimeters normally used for relative dose distribution measurements with a scanning system such as an automatic water phantom.
The object of this standard is:
- to establish requirements for a satisfactory level of performancefor radiotherapy dosimeters;
- to standardize methods for the determination of compliance with this level of performance.
Three levels of performance are specified:
- a lower level of performance applying to field-class dosimeters;
- a higher level of performance applying to reference-classdosimeters;
- a specific level of performance applying to scanning-class dosimeters.
This third edition cancels and replaces the second edition publishedin 1997 and its Amendment 1 (2002) and constitutes a technical revision. The technical modifications versus the second edition of this standard concerns performance requirements of radiotherapy dosimeters intended for the measurement of absorbed dose to water orair kerma in heavy ion radiation fields and scanning-class dosimeters normally used for relative dose distribution measurementswith a scanning system such as an automatic water phantom. This consolidated version consists of the sixth edition (2011) and its amendment 1 (2016). Therefore, no need to order amendment inaddition to this publication.