Document Type

Article

Rights

This item is available under a Creative Commons License for non-commercial use only

Disciplines

Radiology, nuclear medicine and medical imaging

Publication Details

Ultrasound in Med. & Biol., Vol. 43, No. 7, pp. 1494–1505, 2017

Abstract

Commercially available ultrasound quality assurance test phantoms rely upon the long-term acoustic stability of tissue-mimicking-materials (TMMs). The measurement of the acoustic properties can be technically challenging and it is important to ensure its stability. The standard technique is to film-wrap samples of TMM and to measure the acoustic properties in a water bath. In this study, a modified technique is proposed whereby the samples of TMM are measured in a preserving fluid that is intended to maintain their characteristics. The acoustic properties were evaluated using a broadband pulse-echo substitution technique over the frequency range of 4.5 – 50 MHz at 0, 6 and 12 months using both techniques. For both techniques, the measured mean values for the speed of sound and the attenuation were very similar and within the IEC recommended value. However, the results obtained using the proposed modified technique demonstrated greater stability over the 1-year period when compared with the results acquired using the standard technique.

DOI

10.1016/j.ultrasmedbio.2017.02.019

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