IEC 62467-1:2009

FOREWORD
INTRODUCTION
1 Scope and object
2 Normative references
3 Terms and definitions
4 General requirements
  4.1 PERFORMANCE REQUIREMENTS
  4.2 MEASURING ASSEMBLY
  4.3 Source types
      4.3.1 General
      4.3.2 Beta particle-emitting sources
      4.3.3 Low-energy-photon-emitting sources
  4.4 Quantity to be measured
  4.5 Reference and STANDARD TEST CONDITIONS
  4.6 General test conditions
      4.6.1 STANDARD TEST CONDITIONS
      4.6.2 STABILIZATION TIME
      4.6.3 Adjustments during test
      4.6.4 Batteries
  4.7 Constructional requirements as related to performance
      4.7.1 General
      4.7.2 Components
      4.7.3 Display
      4.7.4 Inserts
      4.7.5 STABILIZATION TIME
  4.8 Test of components
5 Limits of performance characteristics
  5.1 Position of source in insert and repeatability
  5.2 USABLE LENGTH
  5.3 RESOLUTION OF THE DISPLAY
  5.4 STABILIZATION TIME
  5.5 LEAKAGE CURRENT
      5.5.1 In AIR KERMA STRENGTH measuring mode
      5.5.2 In charge measuring mode
  5.6 Stability
      5.6.1 Long term stability
      5.6.2 MANUFACTURER method to check long term stability
6 LIMITS OF VARIATION for effects of influence quantities
  6.1 General
  6.2 IONIZATION CHAMBER - recombination losses
  6.3 Operating voltage
      6.3.1 Mains operated MEASURING ASSEMBLY
      6.3.2 Battery operated MEASURING ASSEMBLY
      6.3.3 Rechargeable MEASURING ASSEMBLY
  6.4 Air pressure
  6.5 Change of air pressure and EQUILIBRATION TIME
      of the radiation detector
      6.5.1 VENTED WELL TYPE IONIZATION CHAMBERS
      6.5.2 SEALED WELL TYPE IONIZATION CHAMBERS
  6.6 Temperature and humidity
  6.7 Length RESPONSE
  6.8 Electromagnetic immunity
7 Marking
  7.1 WELL-TYPE IONIZATION CHAMBER ASSEMBLY
  7.2 MEASURING ASSEMBLY
8 ACCOMPANYING DOCUMENTS
  8.1 General
  8.2 Use of the instrument
  8.3 Documentation
Bibliography
Index of defined terms

IEC 62467-1:2009 specifies the performance and some related constructional requirements of well-type ionization chambers and associated measurement apparatus, intended for the determination of a quantity, such as air kerma strength or reference air kerma rate in photon radiation fields or absorbed dose to water at a depth, in photon and beta radiation fields used in brachytherapy, after appropriate calibration for a given type of source. IEC 62467-1:2009 covers the techniques for the quantification of the quantity appropriate for the brachytherapy source under consideration. This quantity may be air kerma strength or reference air kerma rate at 1 m, or absorbed dose to water at a depth (e.g. 2 mm or 5 mm). Measurement of these quantities may be accomplished by a variety of well-type ionization chambers or systems currently available for this purpose. This standard applies to products intended for low dose rate, high dose rate, intravascular, both photon and beta, brachytherapy measurements. It does not apply to instruments for nuclear medicine applications. The application of the standard is limited to instruments that incorporate well-type ionization chambers as detectors. The intended use is the measurement of the output of radioactive, encapsulated sources for intracavitary (insertion into body cavities) or interstitial (insertion into body tissue) applications. The object of IEC 62467-1:2009 is
a) to establish requirements for a satisfactory level of performance for well-type chamber systems, and
b) to standardize the methods for the determination of compliance with this level of performance.
IEC 62467-1:2009 is not concerned with the safety aspects of well-type chamber systems. The well-type chamber systems covered by this standard are not intended for use in patient environment. The electrical safety of well-type chamber systems is covered in IEC 61010-1. The operation of the electrometer measuring system is covered in IEC 60731.