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Towards a dosimetric framework for therapeutic ultrasound.

Shaw, A; ter Haar, G*; Haller, J*; Wilkens, V* (2015) Towards a dosimetric framework for therapeutic ultrasound. Int. J. Hyperthermia, 31 (2). pp. 182-192.

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There is a need for a coherent set of exposure and dose quantities to describe ultrasound fields in media other than water (including tissue and tissue-simulating materials). This paper proposes an outline dosimetry scheme, with quantities for free-field exposure, in situ exposure, dose (instantaneous and cumulative) and effect , to act as a structure for organizing a more complete set of definitions. It also presents findings from a survey of the views of the therapeutic ultrasound community which generally supports the principle of using modified free-field quantities to describe the in situ field, and the prioritising of dose quantities which are related to heating and thermal mechanisms.
Although there is no one-to-one relationship between any known ultrasound dose quantity and a specific biological effect, this can also be said of radiotherapy and other modalities where weighting factors have been developed to calculate the degree of equivalence between different tissues and radiation types. This same separation is recommended for ultrasound, provided that an appropriate set of recognized `engineering¿ quantities can be established for exposure and dose quantities.

Item Type: Article
Keywords: ultrasound, dose, exposure
Subjects: Acoustics
Acoustics > Ultrasound
Identification number/DOI: 10.3109/02656736.2014.997311
Last Modified: 02 Feb 2018 13:13
URI: http://eprintspublications.npl.co.uk/id/eprint/6662

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