SIST EN ISO 19232-5:2019

Non-destructive testing - Image quality of radiographs - Part 5: Determination of the image unsharpness and basic spatial resolution value using duplex wire-type image quality indicators (ISO 19232-5:2018)

This document specifies a method of determining the total image unsharpness and basic spatial resolution of radiographs and radioscopic images. The IQI with up to 13 wire pairs can be used effectively with tube voltages up to 600 kV. The IQI with more than 13 wire pairs can be used effectively at tube voltages lower than 225 kV. When using source voltages in the megavolt range, it is possible that the results are not be completely satisfactory.

Zerstörungsfreie Prüfung - Bildgüte von Durchstrahlungsaufnahmen - Teil 5: Bestimmung der Bildunschärfezahl mit Doppeldraht-Typ- Bildgüteprüfkörpern (ISO 19232-5:2018)

Dieser Teil von ISO 19232 legt ein Verfahren zur Bestimmung der Gesamtbildunschärfe und Basis-Ortsauflösung von Durchstrahlungs- und Röntgenaufnahmen fest.
Die beschriebene Messvorrichtung kann mit einer Röhrenspannung von bis zu 600 kV effektiv eingesetzt werden. Bei Verwendung von Quellenspannung im Megavolt-Bereich können die Prüfergebnisse nicht vollständig zufriedenstellend sein.

Essais non destructifs - Qualité d'image des radiogrammes - Partie 5: Détermination de l'indice de flou de l'image et de la résolution spatiale de base à l'aide d'indicateurs de qualité d'image duplex à fils (ISO 19232-5:2018)

Le présent document spécifie une méthode de détermination de l'indice de flou total de l'image et de la résolution spatiale de base des radiogrammes et des images radioscopiques. L'IQI avec jusqu'à 13 paires de fils peut être utilisé efficacement avec des tensions de tube pouvant atteindre 600 kV. L'IQI avec plus de 13 paires de fils peut être utilisé efficacement avec des tensions de tube inférieures à 225 kV. En cas d'utilisation de tensions de source dans la plage des mégavolts, les résultats peuvent ne pas être entièrement satisfaisants.

Neporušitvene preiskave - Kakovost radiografske slike - 5. del: Določitev motnosti slike in osnovne prostorske ločljivosti z uporabo dupleksnih žičnih indikatorjev kakovosti slike (ISO 19232-5:2018)

Ta dokument določa metodo za določitev skupne motnosti slike in osnovne prostorske ločljivosti radiografskih in radioskopskih slik. Indikator kakovosti slike (IQI) z največ 13 pari kablov je mogoče učinkovito uporabiti s cevno napetostjo do 600 kV. Indikator kakovosti slike z več kot 13 pari kablov je mogoče učinkovito uporabiti pri cevni napetosti, ki je nižja od 225 kV. Kadar uporabljate napetost izvora v megavoltnem razponu, rezultati morda ne bodo povsem zadovoljivi.

General Information

• Status: Published
• Public Enquiry End Date: 23-Jul-2017
• Publication Date: 10-Feb-2019
• ICS: 19.100 - Non-destructive testing
• Technical Committee: PKG - Testing of metallic materials
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 27-Dec-2018
• Due Date: 03-Mar-2019
• Completion Date: 11-Feb-2019
• Ref Project: EN ISO 19232-5:2018 - Non-destructive testing - Image quality of radiographs - Part 5: Determination of the image unsharpness and basic spatial resolution value using duplex wire-type image quality indicators (ISO 19232-5:2018)

Relations

• Replaces: SIST EN ISO 19232-5:2013 - Non-destructive testing - Image quality of radiographs - Part 5: Image quality indicators (duplex wire type) - Determination of image unsharpness value (ISO 19232-5:2013)
• Effective Date: 08-Jun-2022

Overview

EN ISO 19232-5:2018 (CEN) is part of the ISO 19232 series on image quality in non-destructive testing (NDT). This standard specifies a method to determine the total image unsharpness and basic spatial resolution of radiographs and radioscopic (digital) images using duplex wire-type image quality indicators (IQI). It is applicable to film and digital detectors and defines limits for effective use of duplex IQIs with different tube voltages.

Key topics and requirements

• Scope and limits
  • IQIs with up to 13 wire pairs are effective with tube voltages up to 600 kV.
  • IQIs with more than 13 wire pairs are intended for tube voltages below 225 kV.
  • Use at megavolt source voltages may produce unsatisfactory results.
• Definitions and metrics
  • Total image unsharpness (UT), basic spatial resolution (SRb), and line pairs/mm (lp/mm) are defined consistently for film and digital detectors.
  • Detector vs image values are distinguished (e.g., detector SRb vs image SRb) and related to magnification and effective pixel size.
• Measurement methods
  • Visual evaluation on film or monitor.
  • Digital evaluation using a profile function and a 20% modulation depth criterion.
  • Interpolated values derived from linearized profile functions when finer resolution is needed.
• IQI specification
  • Physical and marking requirements for duplex wire IQIs (material, dimensions, holder) and declaration of conformity.
• Documentation and performance
  • Requirements for reporting results, and information on precision and bias.
• Evaluation classes
  • Image quality classes and application guidance for various inspection scenarios are provided.

Practical applications and users

• Intended for professionals performing NDT radiography and radioscopy, including:
  • NDT radiographers and inspectors
  • Quality assurance/quality control managers in manufacturing, aerospace, power generation, and oil & gas
  • Suppliers and manufacturers of digital detectors and imaging plates
  • Personnel responsible for procedure qualification and acceptance testing
• Typical uses:
  • Verifying detector performance and image sharpness
  • Routine image quality checks in inspection workflows
  • Comparing film vs digital imaging performance and setting acceptance criteria

Related standards

• ISO 19232 series (other parts cover different IQIs and image quality assessments)
• ISO 5576 - NDT vocabulary for radiology
• ISO/IEC 17050-1 - Supplier’s declaration of conformity

Keywords: EN ISO 19232-5:2018, non-destructive testing, image quality, radiographs, duplex wire-type IQI, image unsharpness, basic spatial resolution, radioscopic images.

Standards Content (Sample)

SLOVENSKI STANDARD
01-marec-2019
1HSRUXãLWYHQHSUHLVNDYH.DNRYRVWUDGLRJUDIVNHVOLNHGHO'RORþLWHYPRWQRVWL
VOLNHLQRVQRYQHSURVWRUVNHORþOMLYRVWL]XSRUDERGXSOHNVQLKåLþQLKLQGLNDWRUMHY
NDNRYRVWLVOLNH,62
Non-destructive testing - Image quality of radiographs - Part 5: Determination of the
image unsharpness and basic spatial resolution value using duplex wire-type image
quality indicators (ISO 19232-5:2018)
Zerstörungsfreie Prüfung - Bildgüte von Durchstrahlungsaufnahmen - Teil 5:
Bestimmung der Bildunschärfezahl mit Doppeldraht-Typ- Bildgüteprüfkörpern (ISO
19232-5:2018)
Essais non destructifs - Qualité d'image des radiogrammes - Partie 5: Détermination de
l'indice de flou de l'image et de la résolution spatiale de base à l'aide d'indicateurs de
qualité d'image duplex à fils (ISO 19232-5:2018)
Ta slovenski standard je istoveten z: EN ISO 19232-5:2018
ICS:
19.100 Neporušitveno preskušanje Non-destructive testing
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 19232-5
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2018
EUROPÄISCHE NORM
ICS 19.100 Supersedes EN ISO 19232-5:2013
English Version
Non-destructive testing - Image quality of radiographs -
Part 5: Determination of the image unsharpness and basic
spatial resolution value using duplex wire-type image
quality indicators (ISO 19232-5:2018)
Essais non destructifs - Qualité d'image des Zerstörungsfreie Prüfung - Bildgüte von
radiogrammes - Partie 5: Détermination de l'indice de Durchstrahlungsaufnahmen - Teil 5: Bestimmung der
flou de l'image et de la résolution spatiale de base à Bildunschärfezahl mit Doppeldraht-Typ-
l'aide d'indicateurs de qualité d'image duplex à fils (ISO Bildgüteprüfkörpern (ISO 19232-5:2018)
19232-5:2018)
This European Standard was approved by CEN on 24 August 2018.

CEN 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 CEN
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 CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 19232-5:2018 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 19232-5:2018) has been prepared by Technical Committee ISO/TC 135 "Non-
destructive testing" in collaboration with Technical Committee CEN/TC 138 “Non-destructive testing”
the secretariat of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by March 2019, and conflicting national standards shall
be withdrawn at the latest by March 2019.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 19232-5:2013.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 19232-5:2018 has been approved by CEN as EN ISO 19232-5:2018 without any
modification.
INTERNATIONAL ISO
STANDARD 19232-5
Third edition
2018-08
Non-destructive testing — Image
quality of radiographs —
Part 5:
Determination of the image
unsharpness and basic spatial
resolution value using duplex wire-
type image quality indicators
Essais non destructifs — Qualité d'image des radiogrammes —
Partie 5: Détermination de l'indice de flou de l'image et de la
résolution spatiale de base à l'aide d'indicateurs de qualité d'image
duplex à fils
Reference number
ISO 19232-5:2018(E)
©
ISO 2018
ISO 19232-5:2018(E)
© ISO 2018
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2018 – All rights reserved

ISO 19232-5:2018(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Specification of duplex wire-type IQI . 3
4.1 Dimensions, manufacture, and marking . 3
4.1.1 Dimensions and material . 3
4.1.2 Manufacture . 4
4.1.3 Marking . 4
4.2 Declaration of conformity. 4
5 Use of duplex wire . 4
5.1 General . 4
5.2 Visual evaluation . 5
5.3 Evaluation of digital images with profile function . 5
5.4 Evaluation of digital images with profile function by interpolation . 5
5.5 Image quality classes . 6
5.6 Application of duplex wire IQI . 6
6 High resolution IQI with increased measurement range . 8
7 Documentation .10
8 Precision and bias .10
Bibliography .11
ISO 19232-5:2018(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: www .iso .org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 135, Non-destructive testing,
Subcommittee SC 5, Radiation methods.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/members .html.
This third edition cancels and replaces the second edition (ISO 19232-5:2013), which has been
technically revised. The main changes compared to the previous edition are as follows:
— new high definition duplex IQI;
— extended description of usage;
— extended table with basic spatial resolution and linepairs/mm;
— evaluation of duplex wire-type IQI by visual evaluation and evaluation with profile function in
digital images.
A list of all parts in the ISO 19232 series can be found on the ISO website.
iv © ISO 2018 – All rights reserved

INTERNATIONAL STANDARD ISO 19232-5:2018(E)
Non-destructive testing — Image quality of radiographs —
Part 5:
Determination of the image unsharpness and basic spatial
resolution value using duplex wire-type image quality
indicators
1 Scope
This document specifies a method of determining the total image unsharpness and basic spatial
resolution of radiographs and radioscopic images. The IQI with up to 13 wire pairs can be used
effectively with tube voltages up to 600 kV. The IQI with more than 13 wire pairs can be used effectively
at tube voltages lower than 225 kV. When using source voltages in the megavolt range, it is possible that
the results are not be completely satisfactory.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
ISO 5576, Non-destructive testing — Industrial X-ray and gamma-ray radiology — Vocabulary
ISO/IEC 17050-1, Conformity assessment — Supplier’s declaration of conformity — Part 1: General
requirements
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 5576 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https: //www .iso .org/obp
— IEC Electropedia: available at https: //www .electropedia .org/
3.1
duplex wire-type image quality indicator
duplex wire-type IQI
image quality indicator specifically designed to assess the total image unsharpness and basic spatial
image resolution of a radiograph or a digital image and composed of a series of pairs of wire elements
made of high density metal
3.2
total image unsharpness value
U
T
smallest number of the duplex wire pair which is not sufficiently separable and corresponds to wire
diameter plus wire spacing
Note 1 to entry: The corresponding unsharpness values are given in Table 1.
visual 20% 20%
Note 2 to entry: U can be U , U or iU .
T T T T
ISO 19232-5:2018(E)
3.3
total image unsharpness value determined visually
visual
U
T
smallest number of the duplex wire pair, which is visually not separable in a film radiograph on a
viewing station or on a monitor image
3.4
total image unsharpness value determined from a profile function in a digital image
20%
U
T
smallest number of the duplex wire pair, which is not separable or separable by a profile function with
less than 20 % modulation depth in a linearized profile
3.5
interpolated total image unsharpness value
20%
iU
T
smallest number of the duplex wire pair which is separable, determined from a profile function in a
digital image by interpolation from a linearized profile function and obtained by interpolation to 20 %
modulation depth from neighbour element modulations
3.6
basic spatial resolution
SR
b
smallest geometrical detail which can be resolved and half of the measured unsharpness in a digital
image or radiograph
image detector
Note 1 to entry: SR can be SR or SR .
b b b
3.7
basic spatial detector resolution value
detector
SR
b
smallest geometrical detail, which can be resolved with a digital detector at magnification equal to one
visual 20%
and corresponds to half of the measured detector unsharpness, U or U , in a digital image and
T T
corresponds to the effective pixel size and is determined from the smallest number of the duplex wire
pair, which is not separable by visual inspection or from the smallest number of the duplex wire pair
with less than 20 % modulation depth in a linearized profile, measured with the IQI on the detector
without object
Note 1 to entry: For this measurement, the duplex wire IQI is placed directly on the digital detector array or
imaging plate.
3.8
basic spatial image resolution value
image
SR
b
smallest geometrical detail, which can be resolved in a digital image at magnification >1 and corresponds
visual 20%
to half of the measured image unsharpness, U or U , in a digital image and corresponds to the
T T
effective pixel size of the magnified image and is determined from the smallest number of the duplex
wire pair, which is not separable by visual inspection or from the smallest number of the duplex wire
pair with less than 20 % modulation depth in a linearized profile
3.9
interpolated basic spatial image resolution value
image
iSR
b
smallest geometrical detail, which can be resolved in a digital image at magnification >1 and
20%
corresponds to half of the measured image unsharpness, iU , in a digital image and corresponds to
T
the interpolated effective pixel size of the magn
...