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Mechanical validation of viscoelastic parameters for different interface pressures using the Kelvin-Voigt fractional derivative model

Tecse, Aldo, Romero, Stefano E., Romero, Carlos, NAEMI, Roozbeh and Castaneda, Benjamin (2022) Mechanical validation of viscoelastic parameters for different interface pressures using the Kelvin-Voigt fractional derivative model. In: 2022 44th Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC). IEEE, pp. 1512-1515. ISBN 978-1-7281-2782-8

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Abstract or description

The knowledge of the biomechanical properties of tissues is useful for different applications such as disease diagnosis and treatment monitoring. Reverberant Shear Wave Elastography (RSWE) is an approach that has reduced the restrictions on wave generation to characterize the shear wave velocity over a range of frequencies. This approach is based on the generation of a reverberant field that is generated by the reflections of waves from inhomogeneities and tissue boundaries that exist in the tissue. The Kelvin-Voigt Fractional Derivative model is commonly used to characterize elasticity and viscosity of soft tissue when using shear wave ultrasound elatography. These viscoelastic characteristics can be then validated using mechanical measurements (MM) such as stress relaxation. During RSWE acquisition, the effect of interface pressure, induced by pushing the probe on the skin through the gel pad, on the viscous and elastic characteristics of tissue can be investigated. However, the effect of interface pressure on the validity of the extracted viscous and elastic characteristics was not investigated before. Therefore, the purpose of this study was to compare the estimation of the viscoelastic parameters at different thickness of gel pad against the viscoelastic characteristics obtained from MM. The experiments were conducted in a tissue-mimicking phantom. The results confirm that the relaxed elastic constant (μ0) can be depreciated. In addition, a higher congruence was found in the viscous parameter (ηα) estimated at 6 and 7 mm. On the other hand, a difference in the order of fractional derivative (α) was found.

Item Type: Book Chapter, Section or Conference Proceeding
Faculty: School of Life Sciences and Education > Sport and Exercise
Event Title: 44th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC'22)
Event Location: Glasgow
Event Dates: 11-15th July 2022
Depositing User: Roozbeh NAEMI
Date Deposited: 19 Jan 2023 11:46
Last Modified: 19 Jan 2023 11:46
URI: https://eprints.staffs.ac.uk/id/eprint/7612

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