Hivatkozási szám

MSZ EN IEC 61828:2021

Dokumentumazonosító

177191

Cím

Ultrahang. Átalakítók. A gerjesztett terek fókuszálással kapcsolatos fogalommeghatározásai és mérési módszerei (IEC 61828:2020)

Angol cím

Ultrasonics. Transducers. Definitions and measurement methods regarding focusing for the transmitted fields (IEC 61828:2020)

Alkalmazási terület

This document – provides definitions for the transmitted field characteristics of focusing and nonfocusing transducers for applications in medical ultrasound; – relates these definitions to theoretical descriptions, design, and measurement of the transmitted fields of focusing transducers; – gives measurement methods for obtaining defined field characteristics of focusing and nonfocusing transducers; – specifies beam axis alignment methods appropriate for focusing and nonfocusing transducers. This document relates to focusing ultrasonic transducers operating in the frequency range appropriate to medical ultrasound (0,5 MHz to 40 MHz) for both therapeutic and diagnostic applications. It shows how the characteristics of the transmitted field of transducers can be described from the point of view of design, as well as measured by someone with no prior knowledge of the construction details of a particular device. The transmitted ultrasound field for a specified excitation is measured by a hydrophone in either a standard test medium (for example, water) or in a given medium. This document applies only to media where the field behaviour is essentially like that in a fluid (i.e. where the influence of shear waves and elastic anisotropy is small), including soft tissues and tissue-mimicking gels. Any aspects of the field that affect their theoretical description or are important in design are also included. These definitions would have use in scientific communications, system design and description of the performance and safety of systems using these devices. This document incorporates definitions from other related standards where possible, and supplies more specific terminology, both for defining focusing characteristics and for providing a basis for measurement of these characteristics.

ICS

17.140.50 Elektroakusztika

A szabvány nyelve

angol

Az érvényesség kezdete

2021-07-01

Forrás

idt IEC 61828:2020; idt EN IEC 61828:2021

Előd

MSZ EN 61828:2002

Utód

Módosítás

Kiegészítő információk

SZK-közlemények

Kapcsolódó európai jogszabály

A szabvány

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