1、INTERNATIONALSTANDARDIEC62220-1First edition2003-10Medical electrical equipment Characteristics of digital X-ray imaging devices Part 1:Determination of the detective quantumefficiencyAppareils lectromdicaux Caractristiques des appareils dimagerie rayonnement X Partie 1:Dtermination de lefficacit qu
2、antique de dtectionReference numberIEC 62220-1:2003(E)LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.Publication numbering As from 1 January 1997 all IEC publications are issued with a designation in the 60000 series.For example,IEC 3
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9、TANDARDIEC62220-1First edition2003-10Medical electrical equipment Characteristics of digital X-ray imaging devices Part 1:Determination of the detective quantumefficiencyAppareils lectromdicaux Caractristiques des appareils dimagerie rayonnement X Partie 1:Dtermination de lefficacit quantique de dte
10、ction IEC 2003 Copyright-all rights reservedNo part of this publication may be reproduced or utilized in any form or by any means,electronic ormechanical,including photocopying and microfilm,without permission in writing from the publisher.International Electrotechnical Commission,3,rue de Varemb,PO
11、 Box 131,CH-1211 Geneva 20,SwitzerlandTelephone:+41 22 919 02 11 Telefax:+41 22 919 03 00 E-mail:inmailiec.ch Web:www.iec.chUFor price,see current cataloguePRICE CODECommission Electrotechnique InternationaleInternational Electrotechnical Commission LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INT
12、ERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2 62220-1 IEC:2003(E)CONTENTSFOREWORD.3INTRODUCTION.51Scope.62Normative references.63Terminology and definitions.74Requirements.84.1Operating conditions.84.2X-RAY EQUIPMENT.84.3RADIATION QUALITY.94.4TEST DEVICE.104.5Geometry.114.6IRRADIA
13、TION conditions.134.6.1General conditions.134.6.2Exposure measurement.134.6.3Avoidance of LAG EFFECTS.144.6.4IRRADIATION to obtain the CONVERSION FUNCTION.144.6.5IRRADIATION for determination of the NOISE POWER SPECTRUM.144.6.6IRRADIATION with TEST DEVICE in the RADIATION BEAM.155Corrections of RAW
14、DATA.166Determination of the DETECTIVE QUANTUM EFFICIENCY.166.1Definition and formula of DQE(u,v).166.2Parameters to be used for evaluation.176.3Determination of different parameters from the images.176.3.1Linearization of data.176.3.2The NOISE POWER SPECTRUM(NPS).186.3.3Determination of the MODULAT
15、ION TRANSFER FUNCTION(MTF).207Format of conformance statement.208Accuracy.21Annex A(normative)Determination of LAG EFFECTS.23A.1Test of additive LAG EFFECTS.23A.2Test of multiplicative LAG EFFECTS.24Annex B(normative)Terminology Index of defined terms.26Annex C(informative)Calculation of the input N
16、OISE POWER SPECTRUM.27Bibliography.28LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.62220-1 IEC:2003(E)3 INTERNATIONAL ELECTROTECHNICAL COMMISSION_MEDICAL ELECTRICAL EQUIPMENT CHARACTERISTICS OF DIGITAL X-RAY IMAGING DEVICES Part 1:Determination of the detective quantum efficiencyFOREWORD1)The International Electrotechnical Commission(IEC)is a worldwide organization for standardization comprisingall national electrotechnical commi