EN 61675-1:1998

SLOVENSKI STANDARD
01-september-1998
Radionuclide imaging devices - Characteristics and test conditions - Part 1:
Positron emission tomographs (IEC 61675-1:1998)
Radionuclide imaging devices - Characteristics and test conditions -- Part 1: Positron
emission tomographs
Bildgebende Systeme in der Nuklearmedizin - Merkmale und Prüfbedingungen -- Teil 1:
Positronen-Emissions-Tomographen
Dispositifs d'imagerie par radionucléides - Caractéristiques et conditons d'essai -- Partie
1: Tomographes à émisssion de positrons
Ta slovenski standard je istoveten z: EN 61675-1:1998
ICS:
11.040.50 Radiografska oprema Radiographic equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

INTERNATIONAL
IEC
STANDARD
61675-1
First edition
1998-02
Radionuclide imaging devices –
Characteristics and test conditions –
Part 1:
Positron emission tomographs
Dispositifs d’imagerie par radionucléides –
Caractéristiques et conditions d’essai –
Partie 1:
Tomographes à émission de positrons
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– 2 – 61675-1 © IEC:1998(E)
CONTENTS
Page
FOREWORD . 3
Clause
1 General . 4
1.1 Scope and object . 4
1.2 Normative reference . 4
2 Terminology and definitions . 4
3 Test methods. 10
3.1 SPATIAL RESOLUTION . 10
3.2 RECOVERY COEFFICIENT . 13
3.3 Tomographic sensitivity. 14
3.4 Uniformity . 16
3.5 COUNT RATE CHARACTERISTIC . 16
3.6 Scatter measurement. 19
3.7 ATTENUATION correction. 21
4ACCOMPANYING DOCUMENTS . 23
Table 1 – RADIONUCLIDES to be used in performance measurements . 25
Figures
1 Cylindrical head phantom. 26
2 Cross-section of body phantom . 27
3 Arm phantom . 27
4 Phantom insert with hollow spheres . 28
5 Phantom insert with holders for the scatter source . 29
6 Phantom insert for the evaluation of ATTENUATION correction . 30
7 Phantom configuration for COUNT RATE measurements according to 3.5.3.1.2
(cardiac imaging) . 31
8 Scheme of the evaluation of COUNT LOSS correction. 31
9 Evaluation of ATTENUATION correction. 32
10 Evaluation of SCATTER FRACTION. 32
11 Evaluation of FWHM . 33
12 Evaluation of EQUIVALENT WIDTH (EW) . 34
Annex A (informative) Index of defined terms. 35

61675-1 © IEC:1998(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
RADIONUCLIDE IMAGING DEVICES –
CHARACTERISTICS AND TEST CONDITIONS –
Part 1: Positron emission 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 61675-1 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/205/FDIS 62C/214/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.

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RADIONUCLIDE IMAGING DEVICES –
CHARACTERISTICS AND TEST CONDITIONS –
Part 1: Positron emission tomographs
1 General
1.1 Scope and object
This part of IEC 61675 specifies terminology and test methods for declaring the characteristics
POSITRON EMISSION TOMOGRAPHS OSITRON EMISSION TOMOGRAPHS ANNIHILATION
of . P detect the
RADIATION of positron emitting RADIONUCLIDEs by COINCIDENCE DETECTION.
The test methods specified in this part of IEC 61675 have been selected to reflect as much as
possible the clinical use of POSITRON EMISSION TOMOGRAPHS. It is intended that the test
methods be carried out by manufacturers, thereby enabling them to declare the characteristics
POSITRON EMISSION TOMOGRAPHS ACCOMPANYING
of . So, the specifications given in the
DOCUMENTS shall be in accordance with this standard. This standard does not imply which tests
will be performed by the manufacturer on an individual tomograph.
No test has been specified to characterize the uniformity of reconstructed images, because all
methods known so far will mostly reflect the noise in the image.
1.2 Normative reference
The following normative document contains provisions which, through reference in this text,
constitute provisions of this part of IEC 61675. At the time of publication, the edition indicated
was 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 edition of the normative document indicated below. Members of IEC and ISO maintain
registers of currently valid International Standards.
IEC 60788:1984, Medical radiology – Terminology
2 Terminology and definitions
For the purpose of this part of IEC 61675, the definitions given in IEC 60788 (see annex A) and
the following definitions apply.
Defined terms are printed in small capitals.
2.1 TOMOGRAPHY (see annex A)
2.1.1
TRANSVERSE TOMOGRAPHY
in TRANSVERSE TOMOGRAPHY the three-dimensional object is sliced by physical methods, for
example 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.
61675-1 © IEC:1998(E) – 5 –
2.1.2
EMISSION COMPUTED TOMOGRAPHY (ECT)
imaging method for the representation of the spatial distribution of incorporated RADIONUCLIDEs
in selected two-dimensional slices through the object
2.1.2.1
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 (along the LINE OF
RESPONSE) and called Radon-transform.
2.1.2.2
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 SPATIAL
RESOLUTION in all three dimensions.
NOTE – The PROJECTION BEAM mostly has the shape of a long thin cylinder or cone. In POSITRON EMISSION
TOMOGRAPHY, it is the sensitive volume between two detector elements operated in coincidence.
2.1.2.3
PROJECTION ANGLE
angle at which the PROJECTION is measured or acquired
2.1.2.4
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.
2.1.2.5
OBJECT SLICE
slice in the object. The physical property of this slice, that determines the measured
information, is displayed in the tomographic image.
2.1.2.6
IMAGE PLANE
a plane assigned to a plane in the OBJECT SLICE
NOTE – Usually the IMAGE PLANE is the midplane of the corresponding OBJECT SLICE.
2.1.2.7
SYSTEM AXIS
axis of symmetry, characterized by geometrical and physical properties of the arrangement of
the system
NOTE – For a circular POSITRON EMISSION TOMOGRAPH, the SYSTEM AXIS is the axis through the centre of the detector
ring. For tomographs with rotating detectors it is the axis of rotation.
2.1.2.8
TOMOGRAPHIC VOLUME
juxtaposition of all volume elements which contribute to the measured PROJECTIONs for all
PROJECTION ANGLES
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2.1.2.8.1
TRANSVERSE FIELD OF VIEW
dimensions of a slice through the TOMOGRAPHIC VOLUME, perpendicular to the SYSTEM AXIS. For
a circular TRANSVERSE FIELD OF VIEW, it is described by its diameter
NOTE – For non-cylindrical TOMOGRAPHIC VOLUMES the TRANSVERSE FIELD OF VIEW may depend on the axial position
of the slice.
2.1.2.8.2
AXIAL FIELD OF VIEW
dimensions of a slice through the TOMOGRAPHIC VOLUME, parallel to and including the SYSTEM
AXIS. In practice, it is specified only by its axial dimension, given by the distance between the
IMAGE PLANE AXIAL SLICE WIDTH
centre of the outmost defined s plus the average of the measured
2.1.2.8.3
TOTAL FIELD OF VIEW
dimensions (three-dimensional) of the TOMOGRAPHIC VOLUME
2.1.3
POSITRON EMISSION TOMOGRAPHY (PET)
EMISSION COMPUTED TOMOGRAPHY utilizing the ANNIHILATION RADIATION of positron emitting
RADIONUCLIDES by COINCIDENCE DETECTION
2.1.3.1
POSITRON EMISSION TOMOGRAPH
tomographic device, which detects the ANNIHILATION RADIATION of positron emitting
RADIONUCLIDES by COINCIDENCE DETECTION
2.1.3.2
ANNIHILATION RADIATION
ionizing radiation that is produced when a particle and its antiparticle interact and cease to exist
2.1.3.3
COINCIDENCE DETECTION
a method which checks whether two opposing detectors have detected one photon each
simultaneously. By this method the two photons are concatenated into one event.
NOTE – The COINCIDENCE DETECTION between two opposing detector elements serves as an electronic collimation
to define the corresponding PROJECTION BEAM or LINE OF RESPONSE (LOR), respectively.
2.1.3.4
COINCIDENCE WINDOW
time interval during which two detected photons are considered being simultaneous
2.1.3.5
LINE OF RESPONSE (LOR)
the axis of the PROJECTION BEAM
NOTE – In PET, it is the line connecting the centres of two opposing detector
...