EN 61331-1:2014

SLOVENSKI STANDARD
01-december-2014
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Protective devices against diagnostic medical X-radiation - Part 1: Determination of
attenuation properties of materials
Dispositifs de protection radiologique contre les rayonnements X pour diagnostic médical
- Partie 1: Détermination des propriétés d'atténuation des matériaux
Ta slovenski standard je istoveten z: EN 61331-1:2014
ICS:
11.040.50 Radiografska oprema Radiographic equipment
13.280 Varstvo pred sevanjem Radiation protection
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 61331-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2014
ICS 11.040.50 Supersedes EN 61331-1:2002
English Version
Protective devices against diagnostic medical X-radiation - Part
1: Determination of attenuation properties of materials
(IEC 61331-1:2014)
Dispositifs de protection radiologique contre les Strahlenschutz in der medizinischen Röntgendiagnostik -
rayonnements X pour diagnostic médical - Partie 1: Teil 1: Bestimmung von Schwächungseigenschaften von
Détermination des propriétés d'atténuation des matériaux Materialien
(CEI 61331-1:2014) (IEC 61331-1:2014)
This European Standard was approved by CENELEC on 2014-06-11. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2014 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 61331-1:2014 E
Foreword
The text of document 62B/936/FDIS, future edition 2 of IEC 61331-1, prepared by SC 62B, "Diagnostic
imaging equipment", of IEC TC 62, "Electrical equipment in medical practice " was submitted to the IEC-
CENELEC parallel vote and approved by CENELEC as EN 61331-1:2014.
The following dates are fixed:
(dop) 2015-04-24
• latest date by which the document has
to be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2017-06-11
standards conflicting with the
document have to be withdrawn
This document supersedes EN 61331-1:2002.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent
rights.
Endorsement notice
The text of the International Standard IEC 61331-1:2014 was approved by CENELEC as a European
Standard without any modification.
IEC 61331-3 NOTE Harmonised as EN 61331-3.

- 3 - EN 61331-1:2014
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD

applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60601-1 2005 Medical electrical equipment -- Part 1: EN 60601-1 2006
General requirements for basic safety and
essential performance
+EN 60601- 2010
1:2006/corrigendum
Mar. 2010
+AC 2014
+A11 2011
+A1 2012  +A1 2013
IEC 60601-1-3 2008 Medical electrical equipment -- Part 1-3: EN 60601-1-3 2008
General requirements for basic safety and
essential performance - Collateral Standard:
Radiation protection in diagnostic X-ray
equipment
+EN 60601-1- 2010
3:2008/corrigendum
Mar. 2010
+A1 2013  +A1 2013
+AC 2014
IEC/TR 60788 2004 Medical electrical equipment - Glossary of - -
defined terms
IEC 61331-1 ®
Edition 2.0 2014-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Protective devices against diagnostic medical X-radiation –

Part 1: Determination of attenuation properties of materials

Dispositifs de protection radiologique contre les rayonnements X pour

diagnostic médical –
Partie 1: Détermination des propriétés d’atténuation des matériaux

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX T
ICS 11.040.50 ISBN 978-2-8322-1562-3

– 2 – IEC 61331-1:2014 © IEC 2014
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Methods to determine the ATTENUATION RATIO . 7
4.1 General . 7
4.2 NARROW BEAM CONDITION . 7
4.2.1 General description . 7
4.2.2 AIR KERMA RATE measurements . 7
4.2.3 RADIATION QUALITIES and RADIATION DETECTOR . 8
4.2.4 Signal to noise condition . 9
4.2.5 ATTENUATION RATIO evaluation. 10
4.3 BROAD BEAM CONDITION . 10
4.3.1 General description . 10
4.3.2 AIR KERMA RATE measurements . 10
4.3.3 RADIATION QUALITIES and RADIATION DETECTOR . 10
4.3.4 Signal to noise condition . 11
4.3.5 ATTENUATION RATIO evaluation . 12
4.4 Inverse BROAD BEAM CONDITION . 12
4.4.1 General description . 12
4.4.2 AIR KERMA RATE measurements . 12
4.4.3 RADIATION QUALITIES and RADIATION DETECTOR . 13
4.4.4 Signal to noise condition . 14
4.4.5 ATTENUATION RATIO evaluation . 14
4.5 Calculation of the ATTENUATION RATIO for photon-emitting radionuclides . 14
4.5.1 Equation . 14
4.5.2 Decay data . 14
4.5.3 Mass ATTENUATION and mass energy-absorption coefficients . 14
4.5.4 Verification of the mass- ATTENUATION COEFFICIENTS of the test
material . 15
5 Determination of ATTENUATION properties . 16
5.1 ATTENUATION RATIO . 16
5.1.1 Determination . 16
5.1.2 Indication . 16
5.2 BUILD-UP FACTOR . 16
5.2.1 Determination . 16
5.2.2 Indication . 16
5.3 ATTENUATION EQUIVALENT . 16
5.3.1 Determination . 16
5.3.2 Indication . 17
5.4 LEAD EQUIVALENT . 17
5.4.1 Determination . 17
5.4.2 Indication . 17
5.5 LEAD EQUIVALENT class for a SPECIFIED range of RADIATION QUALITIES . 17
5.5.1 Materials. 17
5.5.2 Standard thicknesses . 17

IEC 61331-1:2014 © IEC 2014 – 3 –
5.5.3 Conditions for assignment to a LEAD EQUIVALENT class . 17
5.5.4 Indication . 18
5.6 Homogeneity . 18
5.6.1 Determination . 18
5.6.2 Indication . 18
6 Statement of compliance . 18
Annex A (informative) Tables of ATTENUATION RATIOS, BUILD-UP FACTORS and first HALF-
VALUE LAYERS . 19
Bibliography . 24
Index of defined terms used in this International Standard . 25

Figure 1 – NARROW BEAM CONDITION . 9
Figure 2 – BROAD BEAM CONDITION . 11
Figure 3 – Inverse BROAD BEAM CONDITION . 13

Table 1 – Standard RADIATION QUALITIES for X-RAY BEAMS . 15
Table 2 – Standard gamma RADIATION QUALITIES according to ISO 4037-1 . 16
Table A.1 – ATTENUATION RATIOS F of lead thicknesses from 0,125 mm to 2 mm
N
calculated for RADIATION QUALITIES of Table 1 according to the formula given in 4.5.4. 20
Table A.2 – BUILD-UP FACTOR B measured for RADIATION QUALITIES of Table 1 according
to the formula given in 5.2.1 for lead thicknesses 0,25 mm, 0,35 mm and 0,50 mm . 21
Table A.3 – ATTENUATION RATIOS F of lead thicknesses from 0,125 mm to 7 mm
N
calculated for RADIATION QUALITIES of Tables 1 and 2 according to the formula given in
4.5.4 . 21
Table A.4 – First HALF-VALUE LAYERS in mm Al of RADIATION QUALITIES of Table 1 as a
function of additional lead filters of different thicknesses in the range from 0,125 mm
to 2 mm . 22
Table A.5 – First HALF-VALUE LAYERS in mm Cu of RADIATION QUALITIES of Table 1 as a
function of additional lead filters of different thicknesses in the range from 0,125 mm
to 4 mm .
...