SN EN 61674 : 1997

Foreword
Introduction
1 Scope and object
    1.1 Scope
    1.2 Object
2 Normative references
3 Terminology and definitions
4 General requirements
    4.1 Performance requirements
    4.2 REFERENCE VALUES and STANDARD TEST VALUES
    4.3 General test conditions
          4.3.1 STANDARD TEST CONDITIONS
          4.3.2 Statistical fluctuations
          4.3.3 STABILIZATION TIME
          4.3.4 Adjustments during test
          4.3.5 Batteries
    4.4 Constructional requirements as related to
          performance
          4.4.1 Components
          4.4.2 Display
          4.4.3 Indication of battery condition
          4.4.4 Indication of polarizing voltage failure
          4.4.5 Over-ranging
          4.4.6 Indication of reset or other inactive
                  condition
          4.4.7 MEASURING ASSEMBLIES with multiple
                  DETECTOR ASSEMBLIES
          4.4.8 Radioactive STABILITY CHECK DEVICE
    4.5 Uncertainty of measurement
5 Limits of PERFORMANCE CHARACTERISTICS
    5.1 RELATIVE INTRINSIC ERROR
    5.2 Repeatability
          5.2.1 Repeatability in the ATTENUATED BEAM
          5.2.2 Repeatability in the UNATTENUATED BEAM
    5.3 RESOLUTION of reading
    5.4 STABILIZATION time
    5.5 Effect of pulsed radiation on AIR KERMA and AIR
          KERMA LENGTH measurements
    5.6 Reset on AIR KERMA and AIR KERMA LENGTH ranges
    5.7 Effects of LEAKAGE CURRENT
    5.8 Stability
          5.8.1 Long term stability
          5.8.2 Accumulated dose stability
    5.9 Measurements with a radioactive STABILITY CHECK DEVICE
6 LIMITS OF VARIATION for effects of INFLUENCE QUANTITIES
    6.1 Energy dependence of RESPONSE
    6.2 AIR KERMA RATE dependence of AIR KERMA and AIR
          KERMA LENGTH measurements
          6.2.1 MEASURING ASSEMBLY
          6.2.2 IONIZATION CHAMBER - Recombination losses
    6.3 Dependence of DETECTOR RESPONSE on angle of
          incidence of radiation
    6.4 Operating voltage
    6.5 Air pressure
    6.6 Air pressure EQUILIBRATION TIME of the RADIATION
          DETECTOR
    6.7 Temperature and humidity
    6.8 Electromagnetic compatibility
          6.8.1 Electrostatic discharge
          6.8.2 Radiated electromagnetic fields
          6.8.3 Conducted disturbances induced by bursts
                  and radio frequencies
          6.8.4 Surges
          6.8.5 Voltage dips, short interruptions and voltage
                  variations
    6.9 Field size
    6.10 EFFECTIVE LENGTH and spatial uniformity of RESPONSE
          of CT DOSIMETERS
7 Marking
    7.1 DETECTOR ASSEMBLY
    7.2 MEASURING ASSEMBLY
    7.3 Radioactive STABILITY CHECK DEVICE
8 ACCOMPANYING DOCUMENTS
Annex A (informative) Bibliography
Annex B (informative) Index of defined terms
Annex ZA (normative) Normative references to international
                      publications with their corresponding
                      European publications

Defines the performance and some related constructional requirements of diagnostic dosimeters, as specified in 3.1, for measuring or air kerma, air kerma length or air kerma rate in photon radiation fields in radiography. Includes mammography, radioscopy and computed tomography (CT) for X-rays having generating potentials not in excess of 150 kV. Applies to the performance of dosimeters with ionization chambers and/or semi-conductor detectors as in X-ray diagnostic imaging.