Reference Characterisation of Sound Speed and Attenuation of the IEC Agar-Based Tissue-Mimicking Material Up to a Frequency of 60 MHz

Rajagopal, Srinath; Sadhoo, Neelaksh; Zeqiri, Bajram

doi:10.1016/j.ultrasmedbio.2014.04.018

Cited by 53 publications

(43 citation statements)

References 35 publications

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“…This enabled the attenuation coefficient of PBS to be calculated relative to degassed, de-ionized water. The SoS and the attenuation coefficient of degassed, de-ionized water are well documented Rajagopal et al 2015). The absolute attenuation coefficient of PBS at 37°C was calculated and fitted using a second-degree polynomial as α 0 2 0 002127 0 02076 = + .…”

Section: Acoustic Properties Of Pbsmentioning

confidence: 99%

The acoustical properties of IEC agar-based tissue mimicking material over the frequency range 4.5MHz to 50MHz - a longitudinal study

Rabell-Montiel

Pye

Anderson

et al. 2016

2016 IEEE International Ultrasonics Symposium (IUS)

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Commercially available ultrasound quality assurance test phantoms rely on the long-term acoustic stability of the tissue-mimicking-material (TMM). Measurement of the acoustic properties of the TMM 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 was 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 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 attenuation were very similar and within the International Electrotechnical Commission-recommended value. However, the results obtained using the proposed modified technique exhibited greater stability over the 1-y period compared with the results acquired using the standard technique.

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Section: Acoustic Properties Of Pbsmentioning

confidence: 99%

The acoustical properties of IEC agar-based tissue mimicking material over the frequency range 4.5MHz to 50MHz - a longitudinal study

Rabell-Montiel

Pye

Anderson

et al. 2016

2016 IEEE International Ultrasonics Symposium (IUS)

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“…0 = attenuation coefficient of water (dB/cm) 0 = propagation distance in water (cm) = attenuation coefficient in the gated region (assumed constant dB/cm) The measured compensated power spectrum was compared to the power spectrum expected from extending Faran's theory of scattering to a distribution of scatters [15], [16] ( ) = The parameters of interest ( , 2 ) are found by a technique first described in detail by Oelze et al to minimise the average squared difference between the theoretical normalised power spectrum and ( ) [9]. This involves several expansions and assumptions (such as q < 1) which are fulfilled in this experimental set-up.…”

Section: Figure 2: Experimental Set-up To Obtain Backscattered Power mentioning

confidence: 99%

Quantitative Ultrasound Differentiates Brain and Brain Tumour Phantoms

Thomson

Yang

Stritch

et al. 2019

2019 IEEE International Ultrasonics Symposium (IUS)

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The acoustic impedance and attenuation of chicken liver and gizzard muscle were measured over a frequency range of 1-10MHz. The results validated their use as ultrasound phantoms for brain and brain tumour respectively. These tissues were then used as an initial test of whether quantitative ultrasound (QUS) could differentiate between brain and brain tumour tissue-like materials. QUS is a technique which infers information about tissue microstructure, such as effective scatterer size (ESD) and acoustic concentration, through the backscattered power spectrum of insonated tissues. The ESD of the brain tumour phantom was significantly higher than that of the healthy brain phantom, (87.3 ± 8.6 μm vs 61.2 ± 5.8 μm). The distinction in scattering properties shows potential to use QUS in soft tissue cancer detection.

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“…The ultrasonic properties of materials within the megahertz frequency range are determined using techniques commonly referred to as the through-transmission substitution technique [42,43] and as pulse-echo technique [44]. Using those techniques, it is possible to measure speed of sound and attenuation coefficient of the material under text.…”

Section: Ultrasound Parameter Measurementmentioning

confidence: 99%

“…For inspection in liquid media, the most important aspects are the ultrasonic phase velocity and the scattering pattern [42,43,45]. The behavior of those derived quantities as function of frequency is deeply related to density and viscosity.…”

Section: The Futurementioning

confidence: 99%

Ultrasound Methods for Biodiesel Production and Analysis

Oliveira¹,

Baêsso²,

Moraes³

et al. 2018

Biofuels - State of Development

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Ultrasonic techniques have been widely used in biodiesel production, since the acoustic cavitation is a phenomenon capable of accelerating potentially the transesterification reactions. The equipment employed in such approach was simply equipment available in any regular laboratory of chemistry. Further developments introduced the ultrasound as an important tool to produce biodiesel. The main advantage is increasing the conversion of esters at reduced reaction times, with significantly lower production costs. As a method for characterization and analysis of materials, ultrasound has been used since several decades ago. However, ultrasonic analytical methods based on metrological principles are fairly recent investigated. Using ultrasound as physical principle to interrogate biodiesel is a promising field of research, with some remarkable outcomes produced so far. The aim of this chapter is to demonstrate advances of using ultrasonic techniques in production and characterization of biodiesel, as well as an appraisal of the current technology status, and provide insights into future developments.

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Reference Characterisation of Sound Speed and Attenuation of the IEC Agar-Based Tissue-Mimicking Material Up to a Frequency of 60 MHz

Cited by 53 publications

References 35 publications

The acoustical properties of IEC agar-based tissue mimicking material over the frequency range 4.5MHz to 50MHz - a longitudinal study

The acoustical properties of IEC agar-based tissue mimicking material over the frequency range 4.5MHz to 50MHz - a longitudinal study

Quantitative Ultrasound Differentiates Brain and Brain Tumour Phantoms

Ultrasound Methods for Biodiesel Production and Analysis

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