IEC 61675-2:1998

Radionuclide imaging devices - Characteristics and test conditions - Part 2: Single photon emission computed tomographs

IEC 61675-2:1998 specifies terminology and test methods for describing the characteristics of Anger type rotational gamma camera single photon emission computed tomographs equipped with parallel hole collimators. As these systems are based on Anger type gamma cameras this part of IEC 61675 shall be used in conjunction with IEC 60789. These systems consist of a gantry system, single or multiple detector heads and a computer system together with acquisition, recording, and display devices. The test methods specified in this part of IEC 61675 have been selected to reflect as much as possible the clinical use of Anger type rotational gamma camera single photon emission computed tomographs. It is intended that the test methods be carried out by manufacturers, thereby enabling them to describe the characteristics of gamma camera single photon emission computed tomographs systems on a common basis. No test has been specified to characterize the uniformity of reconstructed images because all methods known so far will mostly reflect the noise of the image.

Dispositifs d'imagerie par radionucléides - Caractéristiques et conditions d'essai - Partie 2: Systèmes de tomographie d'émission à photon unique

L'IEC 61675-2:1998 spécifie la terminologie et les méthodes d'essai relatives à la description des caractéristiques des tomodensitomètres par émission de photons simples des gamma cameras rotatives de type Anger, équipés de collimateurs à trous parallèles. Dans la mesure où ces systèmes sont basés sur les caméras gamma de type Anger, la présente partie de la CEI 61675 doit être utilisée conjointement avec la CEI 60789. Ces systèmes se composent d'un système de portique, de têtes de détecteurs simples ou multiples et d'un système informatique, associés à des dispositifs d'acquisition, d'enregistrement et de visualisation. Les méthodes d'essai spécifiées dans la présente partie de la CEI 61675 ont été sélectionnées afin de refléter autant que possible l'utilisation clinique des tomodensitomètres par émission de photons simples des caméras gamma rotatives de type Anger. L'intention est de faire appliquer ces méthodes d'essai par les constructeurs, leur donnant ainsi les moyens de décrire les caractéristiques des systèmes tomodensitomètres par émission de photons simples des caméras gamma sur la base de critères communs. Aucun essai n'a été spécifié afin de caractériser l'uniformité des images reconstituées, puisque toutes les méthodes connues jusqu'à présent reflèteront principalement le bruit de l'image.

General Information

• Status: Published
• Publication Date: 06-Feb-2005
• ICS: 11.040.50 - Radiographic equipment
• Technical Committee: SC 62C - Equipment for radiotherapy, nuclear medicine and radiation dosimetry
• Drafting Committee: WG 2 - TC 62/SC 62C/WG 2
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 09-Aug-2015

Relations

• Amended By: IEC 61675-2:1998/AMD1:2004 - Amendment 1 - Radionuclide imaging devices - Characteristics and test conditions - Part 2: Single photon emission computed tomographs
• Effective Date: 05-Sep-2023
• Revised: IEC 61675-2:2015 - Radionuclide imaging devices - Characteristics and test conditions - Part 2: Gamma cameras for planar, wholebody, and SPECT imaging
• Effective Date: 05-Sep-2023

Standards Content (Sample)

INTERNATIONAL IEC
STANDARD 61675-2
First edition
1998-01
Radionuclide imaging devices –
Characteristics and test conditions –
Part 2:
Single photon emission computed tomographs
Dispositifs d’imagerie par radionucléides –
Caractéristiques et conditions d’essais –
Partie 2:
Systèmes de tomographie d’émission à photon unique
Reference number
Numbering
As from 1 January 1997 all IEC publications are issued with a designation in the 60000 series.
Consolidated publications
Consolidated versions of some IEC publications including amendments are available. For example, edition
numbers 1.0, 1.1 and 1.2 refer, respectively, to the base publication, the base publication incorporating amendment
1 and the base publication incorporating amendments 1 and 2.
Validity of this publication
The technical content of IEC publications is kept under constant review by the IEC, thus ensuring that the content
reflects current technology.
Information relating to the date of the reconfirmation of the publication is available in the IEC catalogue.
Information on the revision work, the issue of revised editions and amendments may be obtained from IEC National
Committees and from the following IEC sources:
• IEC Bulletin
• IEC Yearbook
On-line access*
•
Catalogue of IEC publications
Published yearly with regular updates
(On-line access)*
Terminology, graphical and letter
symbols
For general terminology, readers are referred to IEC 60050: International Electrotechnical Vocabulary (IEV).
For graphical symbols, and letter symbols and signs approved by the IEC for general use, readers are referred to
publications IEC 60027: Letter symbols to be used in electrical technology, IEC 60417: Graphical symbols for use on
equipment. Index, survey and compilation of the single sheets and IEC 60617: Graphical symbols for diagrams.
IEC publications prepared by the same
technical committee
The attention of readers is drawn to the end pages of this publication which list the IEC publications issued by the
technical committee which has prepared the present publication.
* See web site address on title page.

INTERNATIONAL
IEC
STANDARD
61675-2
First edition
1998-01
Radionuclide imaging devices –
Characteristics and test conditions –
Part 2:
Single photon emission computed tomographs
Dispositifs d’imagerie par radionucléides –
Caractéristiques et conditions d’essais –
Partie 2:
Systèmes de tomographie d’émission à photon unique
 IEC 1998 Droits de reproduction réservés  Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in
utilisée sous quelque forme que ce soit et par aucun any form or by any means, electronic or mechanical,
procédé, électronique ou mécanique, y compris la photo- including photocopying and microfilm, without permission in
copie et les microfilms, sans l'accord écrit de l'éditeur. writing from the publisher.
International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: [phone] e-mail: [e-mail] IEC web site http: //www.iec.ch
CODE PRIX
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International Electrotechnical Commission
Pour prix, voir catalogue en vigueur
For price, see current catalogue

– 2 – 61675-2 © IEC:1998(E)
CONTENTS
Page
FOREWORD . . 3
Clause
1 General . 4
1.1 Scope and object . . 4
1.2 Normative references . 4
2 Terminology and definitions . 4
3 Test methods. 9
3.1 Calibration measurements . 9
3.2 Measurement of COLLIMATOR hole misalignment . 10
3.3 Measurement of SPECT system SENSITIVITY . 11
3.4 Scatter. 12
3.5 Measurement of SPECT non-uniformity of response . 14
3.6 SPECT system SPATIAL RESOLUTION . 14
4 ACCOMPANYING DOCUMENTS . 15
Figures
1 Geometry of PROJECTIONS . 16
2 Cylindrical head phantom. 17
3 Phantom insert with holders for the scatter source . 18
4 Evaluation of SCATTER FRACTION. 19
5 Reporting TRANSVERSE RESOLUTION . 20
6 Evaluation of FWHM . 21
7 Evaluation of EQUIVALENT WIDTH (EW) . 22
Annex A – Index of defined terms . 23

61675-2 © IEC:1998(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
RADIONUCLIDE IMAGING DEVICES –
CHARACTERISTICS AND TEST CONDITIONS –
Part 2: Single photon emission computed tomographs
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. 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. The 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 the 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 National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical reports or guides and they are accepted by the National Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61675-2 has been prepared by subcommittee 62C: Equipment for
radiotherapy, nuclear medicine and radiation dosimetry, of IEC technical committee 62:
Electrical equipment in medical practice.
The text of this standard is based on the following documents:
FDIS Report on voting
62C/206/FDIS 62C/215/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.
In this standard, the following print types are used:
– TERMS DEFINED IN CLAUSE 2 OF THIS STANDARD OR LISTED IN ANNEX A: SMALL CAPITALS.
The requirements are followed by specifications for the relevant tests.
Annex A is for information only.
A bilingual version of this standard may be issued at a later date.

– 4 – 61675-2 © IEC:1998(E)
RADIONUCLIDE IMAGING DEVICES –
CHARACTERISTICS AND TEST CONDITIONS –
Part 2: Single photon emission computed tomographs
1 General
1.1 Scope and object
This part of IEC 61675 specifies terminology and test methods for describing the character-
istics of Anger type rotational GAMMA CAMERA SINGLE PHOTON EMISSION COMPUTED TOMOGRAPHS
(SPECT), equipped with parallel hole collimators. As these systems are based on Anger type
GAMMA CAMERAS this part of IEC 61675 shall be used in conjunction with IEC 60789. These
systems consist of a gantry system, single or multiple DETECTOR HEADS and a computer system
together with acquisition, recording, and display devices.
The test methods specified in this part of IEC 61675 have been selected to reflect as much as
possible the clinical use of Anger type rotational GAMMA CAMERA SINGLE PHOTON EMISSION
COMPUTED TOMOGRAPHS (SPECT). It is intended that the test methods be carried out by
manufacturers thereby enabling them to describe the characteristics of SPECT systems on a
common basis.
No test has been specified to characterize the uniformity of reconstructed images because all
methods known so far will mostly reflect the noise of the image.
1.2 Normative references
The following normative documents contain provisions which, through reference in this text,
constitute provisions of this part of IEC 61675. At the time of publication, the editions indicated
were valid. All normative documents are subject to revision, and parties to agreements based
on this part of IEC 61675 are encouraged to investigate the possibility of applying the most
recent editions of the normative documents indicated below. Members of IEC and ISO maintain
registers of currently valid International Standards.
IEC 60788:1984, Medical radiology – Terminology
IEC 60789:1992, Characteristics and test conditions of radionuclide imaging devices – Anger
type gamma cameras
IEC 61675-1,  Radionuclide imaging devices – Characteristics and test conditions – Part 1:
Positron emission tomographs
2 Terminology and definitions
For the purpose of this part of IEC 61675 the definitions given in IEC 60788, IEC 60789 and
IEC 61675-1 (see annex A), and the following definitions apply.
Defined terms are printed in small capital letters.

61675-2 © IEC:1998(E) – 5 –
2.1
SYSTEM AXIS
Axis of symmetry characterized by geometrical and physical properties of the arrangement of
the system
NOTE – The SYSTEM AXIS of a GAMMA CAMERA with rotating detectors is the axis of rotation.
2.1.1
COORDINATE SYSTEMS
2.1.2
FIXED COORDINATE SYSTEM
Cartesian system with axes X, Y, and Z, Z being the SYSTEM AXIS. The origin of the FIXED
COORDINATE SYSTEM is defined by the centre of the TOMOGRAPHIC VOLUME (see figure 1). The
SYSTEM AXIS is orthogonal to all TRANSVERSE SLICES.
2.1.3
COORDINATE SYSTEM OF PROJECTION
Cartesian system of the IMAGE MATRIX of each two-dimensional projection with axes X and Y
p p
(defined by the axes of the IMAGE MATRIX). The Y axis and the projection of the system axis
p
onto the detector front face have to be in parallel. The origin of the COORDINATE SYSTEM OF
PROJECTION is the centre of the IMAGE MATRIX (see figure 1).
2.1.4
CENTRE OF ROTATION (COR)
Origin of that COORDINATE SYSTEM, which describes the PROJECTIONS of a TRANSVERSE SLICE with
respect to their orientation in space
NOTE – The CENTRE OF ROTATION of a TRANSVERSE SLICE is given by the intersection of the SYSTEM AXIS with the
mid-plane of the corresponding OBJECT SLICE.
2.1.5
OFFSET
Deviation of the position of the PROJECTION of the COR (X' ) from X = 0. (See figure 1)

p p
2.2
TOMOGRAPHY (see annex A)
2.2.1
TRANSVERSE TOMOGRAPHY
In TRANSVERSE TOMOGRAPHY the three-dimensional object is sliced by physical methods, e.g.
collimation, into a stack of OBJECT SLICES, which are considered as being two-dimensional and
independent from each other. The transverse image planes are perpendicular to the SYSTEM
AXIS.
2.2.2
EMISSION COMPUTED TOMOGRAPHY (ECT)
Imaging method for the representation of the spatial distribution of incorporated RADIONUCLIDES
in selected two-dimensional SLICES through the object
2.2.2.1
PROJECTION
Transformation of a three-dimensional object into its two-dimensional image or of a two-
dimensional object into its one-dimensional image, by integrating the physical property which
determines the image along the direction of the PROJECTION BEAM
NOTE – This process is mathematically described by line integrals in the direction of projection and called the
Radon-transform.
– 6 – 61675-2 © IEC:1998(E)
2.2.2.2
PROJECTION BEAM
Determines the smallest possible volume in which the physical property which determines the
image is integrated during the measurement process. Its shape is limited by the SPATIAL
RESOLUTION in all three dimensions.
NOTE – In SPECT the PROJECTION BEAM usually has the shape of a long thin diverging cone.
2.2.2.3
PROJECTION ANGLE
Angle at which the PROJECTION is measured or acquired
NOTE – For illustration see figure 1.
2.2.2.4
SINOGRAM
Two-dimensional display of all one-dimensional PROJECTIONS of an object slice, as a function of
the PROJECTION ANGLE
The PROJECTION ANGLE is displayed on the ordinate. The linear PROJECTION coordinate is
displayed on the abscissa.
2.2.2.5
OBJECT SLICE
A slice in the object. The physical property of this slice that determines the measured
information is displayed in the tomographic image.
2.2.2.6
IMAGE PLANE
A plane assigned to a plane in the OBJECT SLICE
NOTE – Usually the IMAGE PLANE is the mid-plane of the corresponding OBJECT SLICE.
2.2.2.7
TOMOGRAPHIC VOLUME
Ensemble of all volume elements which contribute to the measured PROJECTIONS for all
PROJECTION ANGLES
NOTE – For a rotating GAMMA CAMERA
...

INTERNATIONAL IEC
STANDARD 61675-2
Edition 1.1
2005-02
Edition 1:1998 consolidated with amendment 1:2004
Radionuclide imaging devices –
Characteristics and test conditions –
Part 2:
Single photon emission computed tomographs

Reference number
Publication numbering
As from 1 January 1997 all IEC publications are issued with a designation in the
60000 series. For example, IEC 34-1 is now referred to as IEC 60034-1.
Consolidated editions
The IEC is now publishing consolidated versions of its publications. For example,
edition numbers 1.0, 1.1 and 1.2 refer, respectively, to the base publication, the
base publication incorporating amendment 1 and the base publication incorporating
amendments 1 and 2.
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INTERNATIONAL IEC
STANDARD 61675-2
Edition 1.1
2005-02
Edition 1:1998 consolidated with amendment 1:2004
Radionuclide imaging devices –
Characteristics and test conditions –
Part 2:
Single photon emission computed tomographs

 IEC 2005  Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: [phone] Telefax: [phone] E-mail: [e-mail] Web: www.iec.ch
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CQ
Commission Electrotechnique Internationale
International Electrotechnical Commission
Международная Электротехническая Комиссия
For price, see current catalogue

– 2 – 61675-2 © IEC:1998+A1:2004(E)
CONTENTS
FOREWORD .3

1 General.5
1.1 Scope and object.5
1.2 Normative references .5
2 Terminology and definitions.6
3 Test methods .12
3.1 Calibration measurements .13
3.2 Measurement of COLLIMATOR hole misalignment .14
3.3 Measurement of SPECT system SENSITIVITY.14
3.4 Scatter .16
3.5 Measurement of SPECT non-uniformity of response.18
3.6 SPECT system SPATIAL RESOLUTION.18
3.7 Test methods for single photon computer tomographs
operated in coincidence detection mode .19
4 ACCOMPANYING DOCUMENTS.32

Annex A Index of defined terms .46

Figure 1 – Geometry of PROJECTIONS.35
Figure 2 – Cylindrical head phantom .36
Figure 3 – Phantom insert with holders for the scatter source.37
Figure 4 – Evaluation of SCATTER FRACTION .38
Figure 5 – Reporting TRANSVERSE RESOLUTION .39
Figure 6 – Evaluation of FWHM .40
Figure 7 – Evaluation of EQUIVALENT WIDTH (EW) .41
Figure 8 – Phantom insert with hollow spheres.42
Figure 9 – Cross-section of body phantom .43
Figure 10 – Arm phantom .43
Figure 11 – Phantom configuration for COUNT RATE measurements according to 3.7.5.3.1.2 .44
Figure 12 – Scheme of the evaluation of COUNT LOSS correction .44
Figure 13 – Phantom insert for the evaluation of ATTENUATION correction .45

61675-2 © IEC:1998+A1:2004(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
RADIONUCLIDE IMAGING DEVICES –
CHARACTERISTICS AND TEST CONDITIONS –

Part 2: Single photon emission computed tomographs

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 provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
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
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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 61675-2 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 consolidated version of IEC 61675-2 consists of the first edition (1998) [documents
62C/206/FDIS and 62C/215/RVD] and its amendment 1 (2004) [documents 62C/378/FDIS and
62C/379/RVD].
The technical content is therefore identical to the base edition and its amendment and has
been prepared for user convenience.
It bears the edition number 1.1.
A vertical line in the margin shows where the base publication has been modified by
amendment 1.
– 4 – 61675-2 © IEC:1998+A1:2004(E)
In this standard, the following print types are used:
– TERMS DEFINED IN CLAUSE 2 OF THIS STANDARD OR LISTED IN ANNEX A: SMALL CAPITALS.
The requirements are followed by specifications for the relevant tests.
Annex A is for information only.
A bilingual version of this standard may be issued at a later date.
The committee has decided that the contents of the base publication and its amendments will
remain unchanged until the maintenance result 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.
61675-2 © IEC:1998+A1:2004(E) – 5 –
RADIONUCLIDE IMAGING DEVICES –
CHARACTERISTICS AND TEST CONDITIONS –

Part 2: Single photon emission computed tomographs

1 General
1.1 Scope and object
This part of IEC 61675 specifies terminology and test methods for describing the character-
istics of Anger type rotational GAMMA CAMERA SINGLE PHOTON EMISSION COMPUTED TOMOGRAPHS
(SPECT), equipped with parallel hole collimators. As these systems are based on Anger type
GAMMA CAMERAS this part of IEC 61675 shall be used in conjunction with IEC 60789. These
systems consist of a gantry system, single or multiple DETECTOR HEADS and a computer
system together with acquisition, recording, and display devices.
This part of IEC 61675-2 also specifies test conditions for declaring the characteristics of
single photon computer tomographs operated in coincidence mode as well as in single
photon mode.
The test methods specified for coincidence mode are based on the test methods for
dedicated PET tomographs as described in IEC 61675-1 to reflect as well as possible the
clinical use of coincidence detection. Tests have been modified to reflect the limited
sensitivity and COUNT RATE CHARACTERISTICS of the single photon computer tomographs
operated in coincidence detection mode only when needed.
The test methods specified in this part of IEC 61675 have been selected to reflect as much
as possible the clinical use of Anger type rotational GAMMA CAMERA SINGLE PHOTON EMISSION
COMPUTED TOMOGRAPHS (SPECT). It is intended that the test methods be carried out by
manufacturers thereby enabling them to describe the characteristics of SPECT systems on a
common basis.
No test has been specified to characterize the uniformity of reconstructed images because all
methods known so far will mostly reflect the noise of the image.
1.2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition
of the referenced document (including any amendments) applies.
IEC 60788:1984, Medical radiology – Terminology
IEC 60789:1992, Characteristics and test conditions of radionuclide imaging devices – Anger
type gamma cameras
IEC 61675-1,  Radionuclide imaging devices – Characteristics and test conditions – Part 1:
Positron emission tomographs
– 6 – 61675-2 © IEC:1998+A1:2004(E)
2 Terminology and definitions
For the purposes of this part of IEC 61675 the definitions given in IEC 60788, IEC 60789 and
IEC 61675-1 (some of which are repeated in this clause), and the following definitions apply.
Defined terms are printed in small capital letters.
2.1
SYSTEM AXIS
Axis of symmetry characterized by geometrical and physical properties of the arrangement of
the system
NOTE The SYSTEM AXIS of a GAMMA CAMERA with rotating detectors is the axis of rotation.
2.1.1
COORDINATE SYSTEMS
2.1.2
FIXED COORDINATE SYSTEM
Cartesian system with axes X, Y, and Z, Z being the SYSTEM AXIS. The origin of the FIXED
COORDINATE SYSTEM is defined by the centre of the TOMOGRAPHIC VOLUME (see Figure 1). The
SYSTEM AXIS is orthogonal to all TRANSVERSE SLICES.
2.1.3
COORDINATE SYSTEM OF PROJECTION
Cartesian system of the IMAGE MATRIX of each two-dimensional projection with axes X and Y
p p
(defined by the axes of the IMAGE MATRIX). The Y axis an
...

IEC 61675-2 ®
Edition 1.0 1998-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Radionuclide imaging devices – Characteristics and test conditions –
Part 2: Single photon emission computed tomographs

Dispositifs d’imagerie par radionucléides – Caractéristiques et conditions
d’essai –
Partie 2: Systèmes de tomographie d'émission à photon unique
Copyright © 1998 IEC, Geneva, Switzerland

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IEC 61675-2 ®
Edition 1.0 1998-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Radionuclide imaging devices – Characteristics and test conditions –

Part 2: Single photon emission computed tomographs

Dispositifs d’imagerie par radionucléides – Caractéristiques et conditions

d’essai –
Partie 2: Systèmes de tomographie d'émission à photon unique

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX T
ICS 11.040.50 ISBN 978-2-8322-1974-4

– 2 – IEC 61675-2:1998 © IEC 1998
CONTENTS
Page
FOREWORD . . 3

Clause
1 General . 4
1.1 Scope and object . .  4
1.2 Normative references . 4
2 Terminology and definitions . 4
3 Test methods . 9
3.1 Calibration measurements . 9
3.2 Measurement of COLLIMATOR hole misalignment . 10
3.3 Measurement of SPECT system SENSITIVITY . 11
3.4 Scatter . 12
3.5 Measurement of SPECT non-uniformity of response . 14
3.6 SPECT system SPATIAL RESOLUTION . 14
4 ACCOMPANYING DOCUMENTS . 15

Figures
1 Geometry of PROJECTIONS. 16
2 Cylindrical head phantom . 17
3 Phantom insert with holders for the scatter source . 18
4 Evaluation of SCATTER FRACTION . 19
5 Reporting TRANSVERSE RESOLUTION . 20
6 Evaluation of FWHM. 21
7 Evaluation of EQUIVALENT WIDTH (EW) . 22

Annex A – Index of defined terms . 23

INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
RADIONUCLIDE IMAGING DEVICES –
CHARACTERISTICS AND TEST CONDITIONS –

Part 2: Single photon emission computed tomographs

FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. 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. The 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 the 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 National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical reports or guides and they are accepted by the National Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.

International Standard IEC 61675-2 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 bilingual version (2014-12) corresponds to the English version, published in 1998-01.
The text of this standard is based on the following documents:
FDIS Report on voting
62C/206/FDIS 62C/215/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.
The French version of this standard has not been voted upon.
In this standard, the following print types are used:
– TERMS DEFINED IN CLAUSE 2 OF THIS STANDARD OR LISTED IN ANNEX A: SMALL CAPITALS.
The requirements are followed by specifications for the relevant tests.
Annex A is for information only.

– 4 – IEC 61675-2:1998 © IEC 1998
RADIONUCLIDE IMAGING DEVICES –
CHARACTERISTICS AND TEST CONDITIONS –

Part 2: Single photon emission computed tomographs

1 General
1.1 Scope and object
This part of IEC 61675 specifies terminology and test methods for describing the character-
istics of Anger type rotational GAMMA CAMERA SINGLE PHOTON EMISSION COMPUTED TOMOGRAPHS
(SPECT), equipped with parallel hole collimators. As these systems are based on Anger type
GAMMA CAMERAS this part of IEC 61675 shall be used in conjunction with IEC 60789. These
systems consist of a gantry system, single or multiple DETECTOR HEADS and a computer system
together with acquisition, recording, and display devices.
The test methods specified in this part of IEC 61675 have been selected to reflect as much as
possible the clinical use of Anger type rotational GAMMA CAMERA SINGLE PHOTON EMISSION
COMPUTED TOMOGRAPHS (SPECT). It is intended that the test methods be carried out by
manufacturers thereby enabling them to describe the characteristics of SPECT systems on a
common basis.
No test has been specified to characterize the uniformity of reconstructed images because all
methods known so far will mostly reflect the noise of the image.
1.2 Normative references
The following normative documents contain provisions which, through reference in this text,
constitute provisions of this part of IEC 61675. At the time of publication, the editions indicated
were valid. All normative documents are subject to revision, and parties to agreements based
on this part of IEC 61675 are encouraged to investigate the possibility of applying the most
recent editions of the normative documents indicated below. Members of IEC and ISO maintain
registers of currently valid International Standards.
IEC 60788:1984, Medical radiology – Terminology
IEC 60789:1992, Characteristics and test conditions of radionuclide imaging devices; Anger
type gamma cameras
IEC 61675-1,  Radionuclide imaging devices – Characteristics and test conditions – Part 1:
Positron emission tomographs
2 Terminology and definitions
Fo
...