Supersonic shear wave imaging to assess arterial anisotropy: Ex-vivo testing of the horse aorta

Shcherbakova, Darya; Swillens, Abigaïl; Caenen, Annette; Bock, Sander De; Segers, Patrick; Papadacci, Clément; Tanter, Mickaël; Pernot, Mathieu; Saey, Veronique; Chiers, Koen

doi:10.1109/ultsym.2013.0393

Cited by 4 publications

(2 citation statements)

References 2 publications

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“…However, more sophisticated physics-based models should be developed to correctly convert angular or true wave velocities to tissue stiffness in geometric variations, such as varying wall thickness. This is even more challenging for anisotropic, multi-layered vessel walls [12] , [47] .…”

Section: Discussionmentioning

confidence: 99%

Extending arterial stiffness assessment along the circumference using beam-steered ARFI and wave-tracking: A proof-of-principle study in phantoms and ex vivo

Pruijssen,

Fekkes,

Menssen

et al. 2023

Computational and Structural Biotechnology Journal

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Section: Discussionmentioning

confidence: 99%

Extending arterial stiffness assessment along the circumference using beam-steered ARFI and wave-tracking: A proof-of-principle study in phantoms and ex vivo

Pruijssen,

Fekkes,

Menssen

et al. 2023

Computational and Structural Biotechnology Journal

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“…The SWE measurements were performed with an Aixplorer scanner (SuperSonic Imagine, Aix-enProvence, France) with the probe fixed in an angle position controller above the sample. The probe settings were discussed in our previous works (Shcherbakova et al, 2013(Shcherbakova et al, , 2014. The probe was rotated in steps of 30° from 0° to 180°.…”

Section: Outlinementioning

confidence: 99%

A finite element model to study the effect of tissue anisotropy onex vivoarterial shear wave elastography measurements

Shcherbakova¹,

Debusschere²,

Caenen³

et al. 2017

Phys. Med. Biol.

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Abstract. Shear wave elastography (SWE) is an ultrasound (US) diagnostic method for measuring the stiffness of soft tissues based on generated shear waves (SWs). SWE has been applied to bulk tissues, but in arteries it is still under investigation. Previously performed studies in arteries or arterial phantoms demonstrated the potential of SWE to measure arterial wall stiffness -a relevant marker in prediction of cardiovascular diseases. This study is focused on numerical modelling of SWs in ex vivo equine aortic tissue, yet based on experimental SWE measurements with the tissue dynamically loaded while rotating the US probe to investigate the sensitivity of SWE to the anisotropic structure. A good match with experimental shear wave group speed results was obtained. SWs were sensitive to the orthotropy and nonlinearity of the material. The model also allowed to study the nature of the SWs by performing 2D FFT-based and analytical phase analyses. A good match between numerical group velocities derived using the time-of-flight algorithm and derived from the dispersion curves was found in the cross-sectional and axial arterial views. The complexity of solving analytical equations for nonlinear orthotropic stressed plates was discussed.

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Transmural transverse stiffness estimation in vascular shear wave imaging: A simulation and phantom study

Guo

Lee

2017

Applied Physics Letters

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Shear wave imaging has emerged as a potential non-invasive technique for the quantitative assessment of the arterial shear modulus. Nonetheless, the arterial elasticity estimation in the transverse direction has been overlooked compared with the longitudinal direction, and the estimated transmural stiffness has rarely been evaluated. Accurate depiction of the transverse stiffness across the thin arterial wall warrants comprehensive characterization in both normal and pathological conditions. This study estimated the transmural arterial shear modulus in both the longitudinal (l Long) and transverse directions (l Trans) using group (c T) and phase velocities (c ph) in finite element models and hollow cylindrical tissue-mimicking phantoms with various shape factors. The results were validated against mechanical testing. Zero-order antisymmetric Lamb wave and circumferential Lamb type wave models were considered in the longitudinal and transverse directions of the thin-walled hollow cylinder, respectively. The results derived from the model with the thin plate assumption confirmed that c T underestimated l Long and l Trans. Unlike the c ph-based l Long estimates that were in excellent agreement with measured values, the c ph-based l Trans estimates were found to be comparable to c ph-based l Long at the inner wall but increased radially outward. Transmural l Trans estimation using c ph was demonstrated to be feasible for thin-walled hollow cylinders but necessitated careful account of the wall geometry, in particular the shape factor. Published by AIP Publishing.

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Supersonic shear wave imaging to assess arterial anisotropy: Ex-vivo testing of the horse aorta

Cited by 4 publications

References 2 publications

Extending arterial stiffness assessment along the circumference using beam-steered ARFI and wave-tracking: A proof-of-principle study in phantoms and ex vivo

Extending arterial stiffness assessment along the circumference using beam-steered ARFI and wave-tracking: A proof-of-principle study in phantoms and ex vivo

A finite element model to study the effect of tissue anisotropy onex vivoarterial shear wave elastography measurements

Transmural transverse stiffness estimation in vascular shear wave imaging: A simulation and phantom study

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