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The nonlinear shear modulus was found to exhibit higher contrast than shear modulus for the detection of breast lesions (Bernal, Chamming's et al. 2016) and may thus serve as a potential diagnostic index of tissue pathology. Such nonlinear elastic constant of soft tissues has been demonstrated to be effectively estimated by combining ultrasound elastography and supersonic shear imaging based on acoustoelastic...
Assessing the interventricular septum (IVS) facilitates the understanding of complex ventricular-ventricular interaction and related cardiac diseases. Previous studies have revealed that the functionally bilayered IVS exhibits distinct radial and circumferential strains in its left (Ls) and right (Rs) sides. Nonetheless, the transverse shear and principal strains, which reflect the interlayer sliding...
Estimation of tissue motion in the lateral direction remains a major challenge in 2-D ultrasound strain imaging (USI). Although various methodologies have been proposed to improve the accuracy of estimation of in-plane displacements and strains, the fundamental limitations of 2-D USI and how to choose optimal algorithmic parameters in various tissue deformation paradigms to retrieve the full strain...
UVH GIS (gas insulated switchgear) spacer is the key insulator in UVH transformer substation. Beside insulation, it may suffer the pressure from other structures and SF6 gas in the bus, which put forward a higher request on the mechanical properties of GIS spacer, the concentration of stress may cause tiny flaws which will lead to discharge on the spacer. In order to analyze the mechanical strength...
The anisotropic mechanical properties and view-dependent ultrasonic backscattering have been extensively demonstrated in soft tissues, but their potential effects on ultrasound elastographic techniques remain unclear. The aim of this study was to investigate the performance of a speckle-tracking-based 2D ultrasound strain imaging (USI) method in silico and in vitro when both the tissue mechanical...
Curing induced residual stress of epoxy-alumina composites influences properties of large scale epoxy casting products like Ultra High Voltage(UHV) GIS spacer. It will result in defects like cracks and voids which will worsen electric field distribution and degrade insulation characteristics of spacers, then endanger the safety and stability of power system during long-time operation. According to...
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