1、TECHNICALSPECIFICATIONIEC TS 61895First edition1999-10Ultrasonics Pulsed Doppler diagnosticsystems Test procedures to determineperformanceUltrasons Systmes de diagnostic effet Doppler pulss Procdures dessai pour dterminer la performanceReference numberIEC/TS 61895:1999(E)LICENSED TO MECON Limited.-R
2、ANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.NumberingAs from 1 January 1997 all IEC publications are issued with a designation in the60000 series.Consolidated publicationsConsolidated versions of some IEC publications including amendments areavailable.For exa
3、mple,edition numbers 1.0,1.1 and 1.2 refer,respectively,to thebase publication,the base publication incorporating amendment 1 and the basepublication incorporating amendments 1 and 2.Validity of this publicationThe technical content of IEC publications is kept under constant review by the IEC,thus e
4、nsuring that the content reflects current technology.Information relating to the date of the reconfirmation of the publication is availablein the IEC catalogue.Information on the subjects under consideration and work in progress undertakenby the technical committee which has prepared this publicatio
5、n,as well as the listof publications issued,is to be found at the following IEC sources:IEC web site*Catalogue of IEC publicationsPublished yearly with regular updates(On-line catalogue)*IEC BulletinAvailable both at the IEC web site*and as a printed periodicalTerminology,graphical and letter symbol
6、sFor general terminology,readers are referred to IEC 60050:InternationalElectrotechnical Vocabulary(IEV).For graphical symbols,and letter symbols and signs approved by the IEC forgeneral use,readers are referred to publications IEC 60027:Letter symbols to beused in electrical technology,IEC 60417:Gr
7、aphical symbols for use on equipment.Index,survey and compilation of the single sheets and IEC 60617:Graphical symbolsfor diagrams.*See web site address on title page.LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.TECHNICALSPECIFICATI
8、ONIECTS 61895First edition1999-10Ultrasonics Pulsed Doppler diagnosticsystems Test procedures to determineperformanceUltrasons Systmes de diagnostic effet Doppler pulss Procdures dessai pour dterminer la performancePRICE CODE IEC 1999 Copyright-all rights reservedNo part of this publication may be r
9、eproduced or utilized in any form or by any means,electronic ormechanical,including photocopying and microfilm,without permission in writing from the publisher.International Electrotechnical Commission3,rue de Varemb Geneva,SwitzerlandTelefax:+41 22 919 0300e-mail:inmailiec.ch IEC web site http:/www
10、.iec.chVFor price,see current catalogue Commission Electrotechnique Internationale International Electrotechnical CommissionLICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2 TS 61895 IEC:1999(E)CONTENTSPageFOREWORD.4INTRODUCTION.6Claus
11、e1Scope.72Normative references.73Definitions.74Symbols.125Overall tests of complete systems.125.1General considerations.125.1.1Types of pulsed Doppler ultrasound systems.125.1.2Worst-case conditions.135.1.3Doppler beam axes.145.1.4Probe/target distance variation and measurement.145.2Initial conditio
12、ns.155.2.1Power supply.155.2.2Target movement direction.155.2.3Propagation medium.155.2.4Penetration depth.165.2.5Working depth.165.2.6Focusing.165.2.7Working Doppler angle.165.2.8Wall-thump filter cut-off frequency.175.2.9Transmitter output power.175.2.10 Working pulse repetition frequency(PRF).175
13、.2.11 Doppler(receiver)gain.175.2.12 Test frequency.175.2.13 Working sample volume length.175.2.14 Doppler signal power measurement.175.3Zero signal noise level.175.4Doppler frequency response.185.4.1Frequency response range.185.4.2Deviation from flat response.185.4.3Large signal performance.185.5Sp
14、atial response.195.5.1Sample volume response.195.6Sample volume position registration error.205.7Beam position and orientation.215.8Intrinsic broadening.225.9Dead zone.225.10Acoustic working frequency.225.11Flow direction separation.225.12Velocity estimation accuracy.22LICENSED TO MECON Limited.-RAN
15、CHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.TS 61895 IEC:1999(E)3 5.13Volume flow estimation accuracy.225.14Maximum,mean,mode and median frequency estimation accuracy.235.15Velocity waveform indices estimation accuracy.256Doppler test objects.266.1Test objects.
16、266.2Electronic test object.26Annex A(normative)Description of pulsed Doppler ultrasound systems.28A.1 Single-channel system.28A.2 Multi-channel system.29A.3 Aliasing.29A.4 Duplex and triplex scanners.29Bibliography.32LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.4 TS 61895 IEC:1999(E)INTERNATIONAL ELECTROTECHNICAL COMMISSIONULTRASONICS PULSED DOPPLER DIAGNOSTIC SYSTEMS TEST PROCEDURES TO DETERMINE PERFORMANCEFOREWORD1)The IEC(In