IEC_TS_62791-2015.pdf

IEC TS 62791 Edition 1.0 2015-09 TECHNICA L SPECIFICA TION Ultrasonics Pulse-echo scanners Low-echo sphere phantoms and method for performance testing of gray-scale medical ultrasound scanners applicable to a broad range of transducer types IEC TS 62791:2015-09(en)colourinsideCopyright International Electrotechnical Commission THIS PUBLICA TION IS COPYRIGHT PROTECTED Copyright 2015 IEC,Geneva,Switzerland All rights reserved.Unless otherwise specified,no par t of this publication may be reproduced or utilized in any for m or by any means,electronic or mechanical,including photocopying and microfilm,without per mission in writing fr om either IEC or IECs member National Committee in the country of the requester.If you have any questions about IEC copyright or have an enquiry about obtaining additional r ights to this publication,please contact the address below or your local IEC member National Committee for further infor mation.IEC Centr al Office Tel.:+41 22 919 02 11 3,rue de Varemb Fax:+41 22 919 03 00 CH-1211 Geneva 20 infoiec.ch Switzerland www.iec.ch About t he IEC The International Electr otechnical Commission(IEC)is the leading global organization that prepar es and publishes Inter national Standards for all electr ical,electronic and related technologies.A bout IEC publications The technical content of IEC publications is kept under constant review by the IEC.Please make sur e that you have the latest edition,a cor rigenda or an amendment might have been published.IEC Cat alogue-webstore.iec.ch/cat alogue The stand-alone application for consulting the entire bibliographical information on IEC International Standards,Technical Specifications,Technical R eports and other documents.A v ailable for PC,Mac OS,A ndroid Tablets and iPad.IEC publications search-w w w.iec.ch/searchpub The adv anced search enables to find IEC publications by a variety of criteria(reference number,text,technical committee,).It also gives information on projec ts,replaced and withdrawn publications.IEC Just Published-webstore.iec.ch/justpublished Stay up to date on all new IEC publications.Just Published details all new publications released.A v ailable online and also once a month by email.Elect ropedia-w w w.elect ropedia.org The worlds leading online dic tionary of elec tronic and electrical terms containing more than 30 000 terms and definitions in English and French,with equiv alent terms in 15 additional languages.Also known as the International Elec trotechnical Vocabulary (IEV)online.IEC Glossar y-st d.iec.ch/glossary More than 60 000 electrotechnical terminology entries in English and French extracted from the Terms and Definitions clause of IEC publications issued since 2002.Some entries hav e been collected from earlier publications of IEC TC 37,77,86 and CISPR.IEC Customer Service Cent re-webstore.iec.ch/csc If y ou wish to giv e us y our feedback on this publication or need further assistance,please contact the Customer Serv ice Centre:csciec.ch.Copyright International Electrotechnical Commission IEC TS 62791 Edit ion 1.0 2015-09 TECHNICA L SPECIFICA TION Ultrasonics Pulse-echo scanners Low-echo sphere phantoms and method for performance testing of gray-scale medical ultrasound scanners applicable to a broad range of transducer types INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 11.040.50;17.140.50 ISBN 978-2-8322-2902-6 R egist er ed tr ademar k of t he Int er national Electr ot echnical Commission Warning!Make sure that you obtained this publication from an authorized distributor.colourinsideCopyright International Electrotechnical Commission 2 IEC TS 62791:2015 IEC 2015 CONTENTS FOREWORD.6 INTRODUCTION.8 1 Scope.10 2 Normative references.10 3 Terms and definitions.10 4 Symbols.12 5 General and environmental conditions.13 6 Equipment required.14 6.1 General.14 6.2 Phantom geometries.14 6.2.1 Phantoms for use in the frequency range 2 MHz to 7 MHz.14 6.2.2 Phantoms for use in the frequency range 7 MHz to 15 MHz including micro-convex arrays.14 6.2.3 Total internal-reflection surfaces.15 6.2.4 Spatially random distribution of low-echo spheres.15 6.3 Ultrasonic properties of the tissue-mimicking(TM)phantoms.15 7 Data acquisition assuming a spatially random distribution of low-echo spheres.16 7.1 Methodology.16 7.2 Storage of digitized image data.17 7.3 Digital image files available from the scanner itself.18 7.4 Image archiving systems.18 8 Automated data analysis for quantifying low-echo sphere detectability.18 8.1 General.18 8.2 Computation of mean pixel values(MPVs).18 8.3 Determination of the LSNRm-value for a given depth interval.21 8.3.1 Preliminaries.21 8.3.2 Computation of the LSNRn-values and LSNRm-value in a given depth interval.21 8.3.3 Standard error corresponding to each LSNRn-value.21 Annex A(informative)Example of a phantom for performance testing in the 2 MHz to 7 MHz frequency range.22 Annex B(informative)Illustrations of the computation of LSNRm-values as a function of depth.24 Annex C(informative)