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BS EN 60731:2012+A1:2022

BS EN 60731:2012+A1:2022

$215.11

Medical electrical equipment. Dosimeters with ionization chambers as used in radiotherapy

Published By Publication Date Number of Pages
BSI 2022 108
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PDF Catalog

PDF Pages PDF Title
2 undefined
5 Blank Page
8 Blank Page
9 English

CONTENTS
13 FOREWORD
15 INTRODUCTION
16 1 Scope and object
1.1 Scope
1.2 Object
2 Normative references
17 3 Terms and definitions
29 4 General requirements
4.1 Basic safety and essential performance
4.2 Performance requirements
4.3 Reference values and standard test values
30 4.4 General test conditions and methods
32 4.5 Summary tables
33 Tables

Table 1 – Reference conditions and standard test conditions – chamber assembly
34 Table 2 – Reference conditions and standard test conditions – measuring assembly
Table 3 – Limits of performance characteristics at standard test conditions –chamber assembly
35 Table 4 – Limits of performance characteristics at standard test conditions – measuring assembly
36 Table 5 – Limits of variation of performance characteristics for effects of influence quantities and instrument parameters – chamber assembly
38 Table 6 – Limits of variation of performance characteristics for effects of influence quantities and instrument parameters – measuring assembly
39 4.6 Classification of equipment according to limits of variation
Table 7 – Limits of variation of performance characteristics for effects of influence quantities and instrument parameters – Chamber and measuring assemblies combined
40 5 Chamber assembly performance requirements
5.1 General
5.2 General performance requirements for (radiotherapy) ionization chambers
47 5.3 Performance requirements particular to shell chambers
52 5.4 Performance requirements particular to parallel-plate chambers
54 5.5 Performance requirements particular to vented chambers
56 5.6 Performance requirements particular to sealed chambers
57 6 Measuring assembly performance requirements
6.1 General
6.2 General performance requirements for radiotherapy dosimeters
60 6.3 Performance requirements particular to dosimeters
67 6.4 Performance requirements particular to dose rate meters
73 6.5 Performance requirements particular to battery-operated measuring assemblies
74 6.6 Performance requirements particular to supply mains-operated measuring assemblies
75 7 Stability check device performance requirements
7.1 General
7.2 General performance requirements for stability check devices
76 8 Constructional requirements as related to performance characteristics
8.1 Constructional requirements on chamber assemblies
8.2 Constructional requirements on measuring assemblies
77 8.3 Constructional requirements on stability check devices
78 8.4 Constructional requirements on phantoms and build-up caps
79 9 Marking
9.1 Marking required on chamber assembly
Figures

Figure 1 – Tolerance of depth in phantom
Figure 2 – Tolerance of lateral position in phantom
80 9.2 Marking required on measuring assembly
81 9.3 Marking required on stability check device
82 9.4 Marking required on phantom or build-up cap
10 Accompanying documents
10.1 Accompanying documents for chamber assembly
85 10.2 Accompanying documents for measuring assembly
88 10.3 Accompanying documents for stability check device
89 10.4 Accompanying documents for phantoms and build-up caps
91 Annex A (informative)Values, error and uncertainty
Figure A.1 – Graphical illustration of values, error and uncertainty
92 Annex B (normative)Test equipment for cable microphony
Figure B.1 – Test equipment for cable microphony
93 Annex C (normative)Uncertainty of measurement
95 Figure C.1 – Probability distributions for the performance characteristics to be within the limits of variation ±L and the expression of their variances in terms
of L
97 Table C.1 – Estimate of combined standard uncertainty for performanceof a hypothetical dosimeter
101 Table C.2 – A hypothetical example of the assessment of the uncertainties on the output measurement of an X-ray set using a field-class dosimeter
102 Bibliography
103 Index of defined terms used in this standard

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BS EN 60731:2012+A1:2022
$215.11