Acousto-Mechanical Instrumentation of Multiscale Hysteretic Memristive Properties of the Skin with Nonlinear Time Reversal Imaging

Santos, Serge Dos; Lints, Martin; Masood, Ali; Salupere, Andrus; Pittet, Jean-Christophe; Gratton, Michel; Caliez, Mickael

doi:10.1109/comet.2017.8521466

Cited by 1 publication

(1 citation statement)

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“…Experiments were conducted on both silicone phantoms and porcine muscle tissues, which is a typical material in elasticity studies. 42,43 The results showed that compared with traditional pulse excitation, coded excitation of the vibration enhanced the robustness of the elasticity measurement against noise and increased the measurement accuracy in low SNR scenarios. This is potential for improving measuring distance and sensitivity of elastography.…”

Section: [Gh]mentioning

confidence: 99%

Feasibility of coded vibration in a vibro-ultrasound system for tissue elasticity measurement

Zhao

Wang

et al. 2016

The Journal of the Acoustical Society of America

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The ability of various methods for elasticity measurement and imaging is hampered by the vibration amplitude on biological tissues. Based on the inference that coded excitation will improve the performance of the cross-correlation function of the tissue displacement waves, the idea of exerting encoded external vibration on tested samples for measuring its elasticity is proposed. It was implemented by integrating a programmable vibration generation function into a customized vibro-ultrasound system to generate Barker coded vibration for elasticity measurement. Experiments were conducted on silicone phantoms and porcine muscles. The results showed that coded excitation of the vibration enhanced the accuracy and robustness of the elasticity measurement especially in low signal-to-noise ratio scenarios. In the phantom study, the measured shear modulus values with coded vibration had an R(2 )= 0.993 linear correlation to that of referenced indentation, while for single-cycle pulse the R(2) decreased to 0.987. In porcine muscle study, the coded vibration also obtained a shear modulus value which is more accurate than the single-cycle pulse by 0.16 kPa and 0.33 kPa at two different depths. These results demonstrated the feasibility and potentiality of the coded vibration for enhancing the quality of elasticity measurement and imaging.

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Section: [Gh]mentioning

confidence: 99%