Zeqiri, B; Bond, A D (1993) Development of standard measurement methods for essential properties of ultrasound therapy equipment. NPL Report. RSA(EXT)0036

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Abstract

A European collaborative programme has been organised between TNO (Holland), PTB (Germany) and NPL (UK) by the Bureau Communautaire de Reference (BCR). Its objective was the development of reliable methods of measurement for characterising the output and performance of ultrasound therapy equipment. Fundamental to these methods is the determination of the effective radiating area of the ultrasonic transducer utili sing small hydrophones to map the pressure distribution in the acoustic field. This report details studies undertaken by NPL to assess the accuracy of measurements of effective radiating area using a new, improved definition of the radiating area. Experimental results are presented for a range of normal and defective therapy transducers and important sources of measurement uncertainty identified. Studies undertaken to assess the influence of the measurement system and measurement procedure are presented. The implications of the study for the revision of IEC 150: 1963 are discussed in detail.

Item Type:	Report/Guide (NPL Report)
NPL Report No.:	RSA(EXT)0036
Subjects:	Acoustics Acoustics > Ultrasound
Last Modified:	02 Feb 2018 13:19
URI:	https://eprintspublications.npl.co.uk/id/eprint/2235