1、 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 Internationa
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11、ht 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
12、 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 Commiss
13、ion 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
14、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 as
15、suming 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.1
16、8 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)
