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SN EN 61674 : 1997
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
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MEDICAL ELECTRICAL EQUIPMENT - DOSIMETERS WITH IONIZATION CHAMBERS AND/OR SEMI-CONDUCTOR DETECTORS AS USED IN X-RAY DIAGNOSIS IMAGING
03-01-2016
12-01-2013
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
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