BS-EN-62359-2005.pdf
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1、BRITISH STANDARD BS EN 62359:2005 Ultrasonics Field characterization Test methods for the determination of thermal and mechanical indices related to medical diagnostic ultrasonic fields The European Standard EN 62359:2005 has the status of a British Standard ICS 17.140.50 ? Licensed Copy: sheffieldu
2、n sheffieldun, na, Thu Nov 09 04:54:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 62359:2005 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 January 2006 BSI 31 January 2006 ISBN 0 580 47353 8 National foreword This British Standard
3、is the official English language version of EN 62359:2005. It is identical with IEC 62359:2005. The UK participation in its preparation was entrusted to Technical Committee EPL/87, Ultrasonics, which has the responsibility to: A list of organizations represented on this committee can be obtained on
4、request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the B
5、SI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquir
6、ers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document
7、comprises a front cover, an inside front cover, the EN title page, pages 2 to 43 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Th
8、u Nov 09 04:54:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD EN 62359 NORME EUROPENNE EUROPISCHE NORM October 2005 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Centra
9、l Secretariat: rue de Stassart 35, B - 1050 Brussels 2005 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 62359:2005 E ICS 17.140.50 English version Ultrasonics Field characterization Test methods for the determination of thermal
10、and mechanical indices related to medical diagnostic ultrasonic fields (IEC 62359:2005) Ultrasons Caractrisation du champ Essais pour la dtermination des indices dchauffement et mcaniques des champs dultrasons utiliss pour le diagnostic mdical (CEI 62359:2005) Ultraschall Charakterisierung von Felde
11、rn - Prfverfahren fr die Ermittlung des thermischen und des mechanischen Indexes bezogen auf medizinisch- diagnostische Ultraschallfelder (IEC 62359:2005) This European Standard was approved by CENELEC on 2005-09-13. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which
12、 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 Central Secretariat or to any CENELEC member. This European S
13、tandard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the na
14、tional electrotechnical committees of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United
15、 Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 04:54:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 62359:2005 2 Foreword The text of document 87/300/FDIS, future edition 1 of IEC 62359, prepared by IEC TC 87, Ultrasonics, was submitted to the IEC-CENELEC parallel vote and was ap
16、proved by CENELEC as EN 62359 on 2005-09-13. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2006-07-01 latest date by which the national standards conflicting with the EN hav
17、e to be withdrawn (dow) 2008-10-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 62359:2005 was approved by CENELEC as a European Standard without any modification. _ Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 04:54:04 GMT+00:00 2006,
18、 Uncontrolled Copy, (c) BSI 3 EN 62359:2005 CONTENTS INTRODUCTION.4 1 Scope 5 2 Normative references .5 3 Terms and definitions .5 4 List of symbols .14 5 Test methods for determining the mechanical index and the thermal index.15 5.1 General.15 5.2 Determination of mechanical index.16 5.3 Determinat
19、ion of thermal index general .16 5.4 Determination of thermal index in non-scanning mode16 5.5 Determination of thermal index in scanning mode.18 5.6 Calculations for combined-operating mode.19 5.7 Summary of measured quantities for index determination .19 Annex A (informative) Relationships with ot
20、her standards.21 ANNEX B (informative) Guidance notes for measurement of output power in scanning mode22 B.1 Measurement of output power, P, in scanning modes .22 B.2 Creating a 1 cm azimuthal wide window using a mask of absorbing material or a 1 cm-wide radiation force balance target .22 B.3 Creati
21、ng a 1 cm azimuthal window using electronic control.25 B.4 Measurement of bounded output power25 Annex C (informative) Rationale and derivation of index models .26 C.1 Definition specific to this annex26 C.2 Mechanical index (MI) .27 C.3 Thermal index (TI) .28 ANNEX D (informative) Guidance on the i
22、nterpretation of TI and MI .40 ANNEX ZA (normative) Normative references to international publications with their corresponding European publications43 Figure B.1 Suggested 1 cm-wide aperture mask .24 Figure B.2 Suggested orientation of transducer, mask slit and RFB target.24 Figure B.3 Suggested or
23、ientation of transducer and 1 cm RFB target24 Figure C.1 Focused transducer with a large aperture 35 Figure C.2 Focused transducer with smaller aperture (1 cm2) .35 Figure C.3 Focused transducer with a weak focus (Aeq 1 cm2) 36 Figure C.4 Weakly focused transducer .36 Table 1 Summary of combination
24、formulae for each of the THERMAL INDEX categories.19 Table 2 Summary of the acoustic quantities required for the determination of the indices 20 Table C.1 THERMAL INDEX categories and models28 Table C.2 Thermal index formulae33 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 04:54:04 GMT+00:0
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