Radiotherapy equipment - Coordinates, movements and scales

IEC 61217:2011 applies to equipment and data related to the process of teleradiotherapy, including patient image data used in relation with radiotherapy treatment planning systems, radiotherapy simulators, isocentric gamma beam therapy equipment, isocentric medical electron accelerators, and non-isocentric equipment when relevant. The object of this standard is to define a consistent set of coordinate systems for use throughout the process of teleradiotherapy, to define the marking of scales (where provided), to define the movements of equipment used in this process, and to facilitate computer control when used. This second edition cancels and replaces the first edition, published in 1996, amendment 1, published in 2000 and amendment 2, published in 2007. This edition constitutes a technical revision to include imager and focus coordinate systems in Subclause 3.12. Beyond this Subclause, changes were only introduced where needed to include the above coordinate systems.

Strahlentherapie-Einrichtungen - Koordinaten, Bewegungen und Skalen

Appareils utilisés en radiothérapie - Coordonnées, mouvements et échelles

La CEI 61217:2011 est applicable aux appareils et aux données ayant trait aux opérations de téléradiothérapie, ce qui comprend les images numérisées du patient utilisées dans les systèmes de planification des traitements de radiothérapie, les simulateurs de radiothérapie, les appareils de gamma-thérapie isocentriques, les accélérateurs médicaux d'électrons isocentriques et, quand cela est applicable, les appareils non isocentriques. L'objet de cette norme est de définir des systèmes de coordonnées cohérents qui sont à utiliser tout au long des opérations de téléradiothérapie, de définir les graduations des échelles de mesure (là où elles sont prévues), de définir les mouvements des appareils utilisés dans ces opérations et de faciliter les contrôles informatiques lorsqu'ils sont utilisés. Cette seconde édition annule et remplace la première édition, publiée en 1996, l'amendement 1 publié en 2000, et l'amendement 2 publié en 2007. Cette édition constitue une révision technique visant à inclure les systèmes de coordonnées imageur et de focalisation. Ils sont définis dans le Paragraphe 3.12. En dehors de ce Paragraphe, les modifications se limitent à l'inclusion de ces nouveau systèmes de cordonnées.

Oprema za radioterapijo - Koordinate, gibanje in skale

Ta mednarodni standard se uporablja za opremo in podatke, povezane s postopkom TELERADIOTERAPIJE, vključno s slikovnimi podatki BOLNIKOV, uporabljenih v povezavi z RADIOTERAPEVTSKIMI SISTEMI ZA NAČRTOVANJE ZDRAVLJENJA, RADIOTERAPEVTSKI SIMULATORJI, izocentrično OPREMO ZA OBSEVANJE Z GAMA ŽARKI, izocentričnimi medicinskimi POSPEŠEVALNIKI ELEKTRONOV in neizocentrično opremo, ko je ustrezna. Namen tega standarda je določiti usklajen niz koordinatnih sistemov za uporabo v postopku TELERADIOTERAPIJE, označevanje skal (kjer je na voljo) in gibanje MEDICINSKE ELEKTRIČNE (ME) OPREME, ki se uporablja pri tem postopku, ter omogočiti lažje računalniško krmiljenje pri njeni uporabi.

General Information

Status
Published
Publication Date
12-Apr-2012
Current Stage
6060 - Document made available
Due Date
11-Apr-2012
Completion Date
13-Apr-2012

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SLOVENSKI STANDARD
SIST EN 61217:2012
01-julij-2012
Oprema za radioterapijo - Koordinate, gibanje in skale
Radiotherapy equipment - Coordinates, movements and scales
Strahlentherapie-Einrichtungen - Koordinaten, Bewegungen und Skalen
Appareils utilisés en radiothérapie - Coordonnées, mouvements et échelles
Ta slovenski standard je istoveten z: EN 61217:2012
ICS:
11.040.50 Radiografska oprema Radiographic equipment
13.280 Varstvo pred sevanjem Radiation protection
SIST EN 61217:2012 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
EUROPEAN STANDARD
EN 61217
NORME EUROPÉENNE
April 2012
EUROPÄISCHE NORM
ICS 11.040.50; 13.280 Supersedes EN 61217:1996 + A1:2001 + A2:2008
English version
Radiotherapy equipment -
Coordinates, movements and scales
(IEC 61217:2011)
Appareils utilisés en radiothérapie - Strahlentherapie-Einrichtungen -
Coordonnées, mouvements et échelles Koordinaten, Bewegungen und Skalen
(CEI 61217:2011) (IEC 61217:2011)

This European Standard was approved by CENELEC on 2012-01-11. 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, 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.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2012 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 61217:2012 E
---------------------- Page: 2 ----------------------
EN 61217:2012 - 2 -
Foreword

The text of document 62C/530/FDIS, future edition 2 of IEC 61217, prepared by SC 62C, "Equipment for

radiotherapy, nuclear medicine and radiation dosimetry", of IEC/TC 62, "Electrical equipment in medical

practice" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as

EN 61217:2012.
The following dates are fixed:
(dop) 2012-10-11
• 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) 2015-01-11
standards conflicting with the
document have to be withdrawn
This document supersedes EN 61217:1996 + A1:2001 + A2:2008.

EN 61217:2012 constitutes a technical revision to include imager and focus coordinate systems in 3.12.

Beyond this subclause, changes were only introduced where needed to include the above coordinate

systems.
In this standard, the following print types are used:
– Requirements and definitions: roman type.
– Test specifications: italic type.

– Informative material appearing outside of tables, such as notes, examples and references: in smaller type. Normative text of

tables is also in a smaller type.

– TERMS USED THROUGHOUT THIS STANDARD THAT HAVE BEEN LISTED IN THE INDEX OF DEFINED TERMS: SMALL

CAPITALS.

The verbal forms used in this standard conform to usage described in Annex H of the ISO/IEC Directives,

Part 2. For the purposes of this standard, the auxiliary verb:

– “shall” means that compliance with a requirement or a test is mandatory for compliance with this

standard;

– “should” means that compliance with a requirement or a test is recommended but is not mandatory for

compliance with this standard;

– “may” is used to describe a permissible way to achieve compliance with a requirement or test.

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.

This document has been prepared under a mandate given to CENELEC by the European Commission

and the European Free Trade Association, and supports essential requirements of EU Directive(s).

For the relationship with EU Directive(s) see informative Annex ZZ, which is an integral part of this

document.
---------------------- Page: 3 ----------------------
- 3 - EN 61217:2012
Endorsement notice

The text of the International Standard IEC 61217:2011 was approved by CENELEC as a European

Standard without any modification.

In the official version, for Bibliography, the following notes have to be added for the standards indicated:

IEC 60976:2007 NOTE Harmonized as EN 60976:2007 (not modified).
IEC 61168:1993 NOTE Harmonized as EN 61168:1994 (not modified).
---------------------- Page: 4 ----------------------
EN 61217:2012 - 4 -
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 When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD

applies.
Publication Year Title EN/HD Year
IEC 60601-1 2005 Medical electrical equipment - EN 60601-1 2006

+ corr. December 2006 Part 1: General requirements for basic safety + corr. March 2010

+ corr. December 2007 and essential performance + A11 2011
IEC 60601-1-3 2008 Medical electrical equipment - EN 60601-1-3 2008
Part 1-3: General requirements for basic + corr. March 2010
safety and essential performance - Collateral
Standard: Radiation protection in diagnostic
X-ray equipment
IEC 60601-2-1 2009 Medical electrical equipment - EN 60601-2-1 201X
Part 2-1: Particular requirements for the basic
safety and essential performance of electron
accelerators in the range 1 MeV to 50 MeV
IEC 60601-2-11 1997 Medical electrical equipment - EN 60601-2-11 1997
Part 2-11: Particular requirements for the
safety of gamma beam therapy equipment
IEC 60601-2-29 2008 Medical electrical equipment - EN 60601-2-29 2008
Part 2-29: Particular requirements for the + A11 2011
basic safety and essential performance of
radiotherapy simulators
IEC/TR 60788 2004 Medical electrical equipment - Glossary of - -
defined terms
IEC 62083 2009 Medical electrical equipment - Requirements EN 62083 2009
for the safety of radiotherapy treatment
planning systems
To be published.
---------------------- Page: 5 ----------------------
- 5 - EN 61217:2012
Annex ZZ
(informative)
Coverage of Essential Requirements of EU Directives

This European Standard has been prepared under a mandate given to CENELEC by the European

Commission and the European Free Trade Association and within its scope the standard covers the

relevant essential requirements as given in Annex I of the EC Directive 93/42/EEC for ERs 9.1 and 11.2.1

last sentence only.

Compliance with this standard provides one means of conformity with the specified essential

requirements of the Directive concerned.

WARNING: Other requirements and other EC Directives may be applicable to the products falling within

the scope of this standard.
---------------------- Page: 6 ----------------------
IEC 61217
Edition 2.0 2011-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Radiotherapy equipment – Coordinates, movements and scales
Appareils utilisés en radiothérapie – Coordonnées, mouvements et échelles
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XB
ICS 11.040.50; 13.280 ISBN 978-2-88912-824-2
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 7 ----------------------
– 2 – 61217 © IEC:2011
CONTENTS

FOREWORD ........................................................................................................................... 6

INTRODUCTION ..................................................................................................................... 8

1 Scope and object ............................................................................................................ 10

2 Normative references ..................................................................................................... 10

3 Coordinate systems ........................................................................................................ 10

3.1 General ................................................................................................................. 10

3.2 General rules ........................................................................................................ 11

3.3 Fixed reference system ("f") (Figure 1a) ................................................................ 12

3.4 GANTRY coordinate system ("g") (Figure 4) ............................................................. 12

3.5 BEAM LIMITING DEVICE or DELINEATOR coordinate system ("b") (Figure 5) ..................... 13

3.6 WEDGE FILTER coordinate system ("w") (Figure 7) .................................................. 13

3.7 X-RAY IMAGE RECEPTOR coordinate system ("r") (Figures 6 and 8) .......................... 14

3.8 PATIENT SUPPORT coordinate system ("s") (Figure 9) ................................................ 14

3.9 Table top eccentric rotation coordinate system ("e") (Figures 10 and 11) ............... 15

3.10 Table top coordinate system ("t") (Figures 10, 11, 18 and 19)................................ 15

3.11 PATIENT coordinate system ("p") (Figures 17a and 17b) ......................................... 16

3.12 Imager coordinate system ("i") and focus coordinate system ("o") ......................... 17

3.12.1 General ..................................................................................................... 17

3.12.2 The imager coordinate system ("i") ............................................................ 17

3.12.3 Focus coordinate system ("o") ................................................................... 18

4 Identification of scales and digital DISPLAYS ..................................................................... 18

5 Designation of ME EQUIPMENT movements ....................................................................... 19

6 ME EQUIPMENT zero positions............................................................................................ 19

7 List of scales, graduations, directions and DISPLAYS ......................................................... 20

7.1 General ................................................................................................................. 20

7.2 Rotation of the GANTRY (Figures 14a and 14b) ........................................................ 20

7.3 Rotation of the BEAM LIMITING DEVICE or DELINEATOR (Figures 15a and 15b) ............... 20

7.4 Rotation of the WEDGE FILTER (Figures 7 and 14a) ................................................... 20

7.5 RADIATION FIELD or DELINEATED RADIATION FIELD ...................................................... 21

7.5.1 General ..................................................................................................... 21

7.5.2 Edges of RADIATION FIELD or DELINEATED RADIATION FIELD (Figure 16a) ........ 21

7.5.3 DISPLAY of RADIATION FIELD or DELINEATED RADIATION FIELD

(Figures 16a to 16k) .................................................................................. 22

7.6 PATIENT SUPPORT isocentric rotation ...................................................................... 23

7.7 Table top eccentric rotation ................................................................................... 23

7.8 Table top linear and angular movements ............................................................... 24

7.8.1 Vertical displacement of the table top ........................................................ 24

7.8.2 Longitudinal displacement of the table top ................................................. 24

7.8.3 Lateral displacement of the table top ......................................................... 24

7.8.4 Pitch of the table top ................................................................................. 24

7.8.5 Roll of the table top ................................................................................... 24

7.9 X-RAY IMAGE RECEPTOR movements ........................................................................ 24

7.9.1 X-RAY IMAGE RECEPTOR rotation .................................................................. 24

7.9.2 X-RAY IMAGE RECEPTOR radial displacement from RADIATION SOURCE

(SID) ......................................................................................................... 25

7.9.3 X-RAY IMAGE RECEPTOR radial displacement from ISOCENTRE .......................... 25

---------------------- Page: 8 ----------------------
61217 © IEC:2011 – 3 –

7.9.4 X-RAY IMAGE RECEPTOR longitudinal displacement ......................................... 25

7.9.5 X-RAY IMAGE RECEPTOR lateral displacement ................................................. 25

7.10 Other scales .......................................................................................................... 25

Annex A (informative) Examples of coordinate transformations between individual

coordinate systems ............................................................................................................... 57

Annex B (informative) Coordinate transformations between IEC and DICOM PATIENT

coordinates ........................................................................................................................... 64

Bibliography .......................................................................................................................... 65

Index of defined terms .......................................................................................................... 66

Figure 1a – Coordinate systems for an isocentric RADIOTHERAPY EQUIPMENT (see 3.1)

with all angular positions set to zero ..................................................................................... 27

Figure 1b – Translation of origin Id along Xm, Ym, Zm and rotation around axis Zd

parallel to Zm (see 3.2d)) ...................................................................................................... 28

Figure 1c – Translation of origin Id along Xm, Ym, Zm and rotation around axis Yd

parallel to Ym (see 3.2d)) ..................................................................................................... 28

Figure 2 – X Y Z right-hand coordinate mother system (isometric drawing) showing ψ,

ϕ, θ directions of positive rotation for daughter system (see 3.2a)) ........................................ 29

Figure 3 – Hierarchical structure among coordinate systems (see 3.2c) and 3.2e)) ............... 30

Figure 4 – Rotation (ϕg = 15°) of GANTRY coordinate system Xg, Yg, Zg in fixed

coordinate system Xf, Yf, Zf (see 3.4) ................................................................................... 31

Figure 5 – Rotation (θb = 15°) of BEAM LIMITING DEVICE or DELINEATOR coordinate

system Xb, Yb, Zb in GANTRY coordinate system Xg, Yg, Zg, and resultant rotation of

RADIATION FIELD or DELINEATED RADIATION FIELD of dimensions FX and FY (see 3.5) ............... 32

Figure 6 – Displacement of image intensifier type X-RAY IMAGE RECEPTOR coordinate

system origin, Ir, in GANTRY coordinate system, by Rx = –8, Ry = +10, Rz = –40

(see 3.7) ............................................................................................................................... 33

Figure 7 – Rotation (θw = 270°) and translation of WEDGE FILTER coordinate system Xw,

Yw, Zw in BEAM LIMITING DEVICE coordinate system Xb, Yb, Zb, the BEAM LIMITING DEVICE

coordinate system having a rotation θb = 345° (see 3.6) ....................................................... 34

Figure 8 – Rotation (θr = 90°) and displacement of X-RAYIMAGE RECEPTOR coordinate

system Xr, Yr, Zr in GANTRY coordinate system Xg, Yg, Zg (see 3.7) .................................... 35

Figure 9 – Rotation (θs = 345°) of PATIENT SUPPORT coordinate system Xs, Ys, Zs in

fixed coordinate system Xf, Yf, Zf (see 3.8) ........................................................................... 36

Figure 10 – Table top eccentric coordinate system rotation θe in PATIENT SUPPORT

coordinate system which has been rotated by θs in the fixed coordinate system with

θe = 360° – θs (see 3.9 and 3.10) ......................................................................................... 37

Figure 11a – Table top displaced below ISOCENTRE by Tz = –20 cm (see 3.9 and 3.10) ......... 37

Figure 11b – Table top coordinate system displacement Tx = + 5, Ty = Le + 10 in

PATIENT SUPPORT coordinate system Xs, Ys, Zs rotation (θs = 330°) in fixed coordinate

system Xf, Yf, Zf (see 3.9 and 3.10) ...................................................................................... 38

Figure 11c – Table top coordinate system rotation (θe = 30°) about table top eccentric

system. PATIENT SUPPORT rotation (θs = 330°) in fixed coordinate system Tx = 0, Ty =

Le (see 3.9 and 3.10) ............................................................................................................ 38

Figure 12a – Example of BEAM LIMITING DEVICE scale, pointer on mother system
(GANTRY), scale on daughter system (BEAM LIMITING DEVICE), viewed from ISOCENTRE

(see 3.2f)2) and Clause 4) ................................................................................................... 39

Figure 12b – Example of BEAM LIMITING DEVICE scale, pointer on daughter system (BEAM

LIMITING DEVICE), scale on mother system (GANTRY), viewed from ISOCENTRE (see

3.2f)2) and Clause 4) ............................................................................................................ 40

---------------------- Page: 9 ----------------------
– 4 – 61217 © IEC:2011

Figure 12c – Examples of scales (see Clause 4) ................................................................... 40

Figure 13a – Rotary GANTRY (adapted from IEC 60601-2-1) with identification of axes 1

to 8, directions 9 to 13, and dimensions 14 and 15 (see Clause 5) ....................................... 41

Figure 13b − ISOCENTRIC RADIOTHERAPY SIMULATOR or TELERADIOTHERAPY EQUIPMENT,

with identification of axes 1; 4 to 6; 19, of directions 9 to 12; 16 to 18 and of

dimensions 14; 15 (see Clause 5) ......................................................................................... 42

Figure 13c – View from radiation source of teleradiotherapy radiation field or radio-

therapy simulator delineated radiation field (see Clause 5) ................................................... 43

Figure 14a – Example of ISOCENTRIC TELERADIOTHERAPY EQUIPMENT (see 7.2 and 7.4) ........... 44

Figure 14b – Example of ISOCENTRIC RADIOTHERAPY SIMULATOR equipment (see 7.2) ............. 45

Figure 15a – Rotated (θb = 30°) symmetrical rectangular RADIATION FIELD (FX × FY) at

NORMAL TREATMENT DISTANCE, viewed from ISOCENTRE looking toward RADIATION SOURCE

(see 7.3) ............................................................................................................................... 46

Figure 15b – Same rotated (θb = 30°) symmetrical rectangular RADIATION FIELD (FX ×

FY) at NORMAL TREATMENT DISTANCE, viewed from RADIATION SOURCE (see 7.3) ...................... 46

Figure 16a – Rectangular and symmetrical RADIATION FIELD or DELINEATED RADIATION

FIELD, viewed from RADIATION SOURCE (see 7.5) ..................................................................... 47

Figure 16b – Rectangular and asymmetrical in Yb RADIATION FIELD or DELINEATED

RADIATION FIELD, viewed from RADIATION SOURCE (see 7.5) ..................................................... 47

Figure 16c – Rectangular and asymmetrical in Xb RADIATION FIELD or DELINEATED

RADIATION FIELD, viewed from RADIATION SOURCE (see 7.5) ..................................................... 48

Figure 16d – Rectangular and asymmetrical in Xb and Yb RADIATION FIELD or

DELINEATED RADIATION FIELD, viewed from RADIATION SOURCE (see 7.5) ................................... 48

Figure 16e – Rectangular and symmetrical RADIATION FIELD, rotated by θb = 30°,

viewed from RADIATION SOURCE (see 7.5) ............................................................................... 49

Figure 16f – Rectangular and asymmetrical in Yb RADIATION FIELD, rotated by θb = 30°,

viewed from RADIATION SOURCE (see 7.5) ............................................................................... 49

Figure 16g – Rectangular and asymmetrical in Xb RADIATION FIELD, rotated by θb = 30°,

viewed from RADIATION SOURCE (see 7.5) ............................................................................... 50

Figure 16h – Rectangular and asymmetrical in Xb and Yb RADIATION FIELD, rotated by

θb = 30°, viewed from RADIATION SOURCE (see 7.5) ................................................................ 51

Figure 16i – Irregular multi-element (multileaf) contiguous RADIATION FIELD, viewed from

RADIATION SOURCE, with element motion in Xb direction (see 7.5) .......................................... 52

Figure 16j – Irregular multi-element (multileaf) two-part RADIATION FIELD, viewed from

RADIATION SOURCE, with element motion in Xb direction (see 7.5) .......................................... 53

Figure 16k – Irregular multi-element (multileaf) contiguous RADIATION FIELD, viewed

from RADIATION SOURCE, with element motion in Yb direction (see 7.5) .................................. 54

Figure 17a – PATIENT coordinate system (PATIENT is supine) ................................................. 55

Figure 17b – Rotation of PATIENT coordinate system ............................................................. 55

Figure 18 – Table top pitch rotation of table top coordinate system Xt, Yt, Zt (see 3.10

and 7.8.4) ............................................................................................................................ 56

Figure 19 – Table top roll rotation of table top coordinate system Xt, Yt, Zt (see 3.10.

and 7.8.5) ............................................................................................................................. 56

Figure B.1 – Coordinate transformations between IEC and DICOM PATIENT coordinates ....... 64

---------------------- Page: 10 ----------------------
61217 © IEC:2011 – 5 –

Table 1 – ME EQUIPMENT movements and designations ........................................................ 19

Table 2 – Individual coordinate systems................................................................................ 26

Table A.1 − Rotation matrices ............................................................................................... 58

---------------------- Page: 11 ----------------------
– 6 – 61217 © IEC:2011
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
RADIOTHERAPY EQUIPMENT –
COORDINATES, MOVEMENTS AND SCALES
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of IEC is to promote

international co-operation on all questions concerning standardization in the electrical and electronic fields. To

this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,

Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC

Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested

in the subject dealt with may participate in this preparatory work. International, governmental and non-

governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely

with the International Organization for Standardization (ISO) in accordance with conditions determined by

agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

consensus of opinion on the relevant subjects since each technical committee has representation from all

interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

misinterpretation by any end user.

4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

transparently to the maximum extent possible in their national and regional publications. Any divergence

between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in

the latter.

5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

members of its technical committees and IEC National Committees for any personal injury, property damage or

other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

Publications.

8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

International standard IEC 61217 has been prepared by subcommittee 62C: Equipment for

radiotherapy, nuclear medicine and radiation dosimetry, of IEC technical committee 62:

Electrical equipment in medical practice.

This second edition cancels and replaces the first edition, published in 1996, amendment 1,

published in 2000 and amendment 2, published in 2007. This edition constitutes a technical

revision to include imager and focus coordinate systems in Subclause 3.12. Beyond this

Subclause, changes were only introduced where needed to include the above coordinate

systems.
The text of this particular standard is based on the following documents:
FDIS Report on voting
62C/530/FDIS 62C/539/RVD

Full information on the voting for the approval of this standard can be found in the report on

voting indicated in the above table.
---------------------- Page: 12 ----------------------
61217 © IEC:2011 – 7 –

This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

In this standard, the following print types are used:
– Requirements and definitions: roman type.
– Test specifications: italic type.

– Informative material appearing outside of tables, such as notes, examples and references: in smaller type.

Normative text of tables is also in a smaller type.

– TERMS USED THROUGHOUT THIS STANDARD THAT HAVE BEEN LISTED IN THE INDEX OF DEFINED

TERMS: SMALL CAPITALS.

The verbal forms used in this standard conform to usage described in Annex H of the ISO/IEC

Directives, Part 2. For the purposes of this standard, the auxiliary verb:

– “shall” means that compliance with a requirement or a test is mandatory for compliance

with this standard;

– “should” means that compliance with a requirement or a test is recommended but is not

mandatory for compliance with this standard;

– “may” is used to describe a permissible way to achieve compliance with a requirement or

test.

The committee has decided that the contents of this publication will remain unchanged until

the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data

related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
---------------------- Page: 13 -------------------
...

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