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YY/T 0642-2022Ultrasonics-Field characterization-Test methods for the determination of thermal and mechanical indices related to medical diagnostic ultrasonic fields (English PDF)

超声声场特性确定医用诊断超声场热和机械指数的试验方法

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Issued by

NMPA

Level / Type

Industry · Recommended

Issue date

August 17, 2022

Implementation date

September 1, 2024

Scope

YY/T 0642-2022 is the English-translated version of 超声声场特性确定医用诊断超声场热和机械指数的试验方法.

YY/T 0642-2022 is the Chinese pharmaceutical industry standard covering ultrasonics-Field characterization-Test methods for the determination of thermal and mechanical indices related to medical diagnostic ultrasonic fields.

It was issued on 17 August 2022 and has been in force since 1 September 2024, replacing YY/T 0642-2014. The document is under the responsibility of the National Medical Products Administration.

This page is published from the official record of the 2022 edition. The figures, limits and tables the standard contains are those of the document itself, delivered in full with the English translation.

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Document preview — YY/T 0642-2022

National Standard of the People's Republic of China

Replacing: YY/T 0642-2014

Issued by: National Medical Products Administration of the People's Republic of China

1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Test methods for determining the mechanical index and the thermal index
Annex A (informative) Explanation of the principle of the index models and their derivation
Annex B (informative) Guidance on the measurement of the output power in combined operating modes, in scanning mode and with a 1 cm by 1 cm window
Annex C (informative) Contribution of the self heating of the transducer to the temperature rise during ultrasonic exposure
Annex D (informative) Guidance on the interpretation of MI and TI
Annex E (informative) Explanation of the principle for determining the values of the maximum unattenuated and attenuated spatial peak temporal average intensity and spatial peak pulse average intensity
Bibliography

Document data

Chinese classification (CCS): C41.

Estimated length of the Chinese original: 64,677 words.

3 Terms and definitions

4 Symbols

5 Test methods for determining the mechanical index and the thermal index

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 57 pages — is available in the English PDF.

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Editions of YY/T 0642

Edition	Title	Revision	Status
YY/T 0642-2022	Ultrasonics-Field characterization-Test methods for the determination of thermal and mechanical indices related to medical diagnostic ultrasonic fields	current edition	Current
YY/T 0642-2014	Ultrasonics-Field characterization-Test methods for the determination of thermal and mechanical indices related to medical diagnostic ultrasonic fields	previous edition	Superseded

This page sells the current edition, YY/T 0642-2022. Earlier editions are listed for reference only.

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