Application of shear wave imaging and shear wave dispersion ultrasound vibrometry in assessing viscoelastic properties of human thyroid: In vivo pilot study

2013 ◽  
Vol 134 (5) ◽  
pp. 4009-4009 ◽  
Author(s):  
Mohammad Mehrmohammadi ◽  
Pengfei Song ◽  
Carolina A. Carrascal ◽  
Matthew W. Urban ◽  
Matthew R. Callstrom ◽  
...  
Keyword(s):  
Pilot Study ◽  
Shear Wave ◽  
Viscoelastic Properties ◽  
Wave Dispersion ◽  
Human Thyroid ◽  
Shear Wave Imaging ◽  
Wave Imaging

scholarly journals Evaluation of tensile stress in carotid artery: evidence from ultrasonography

2019 ◽  
Author(s):  
Xianghong Luo ◽  
Rong Wu ◽  
Lianfang Du ◽  
Zhaojun Li
Keyword(s):  
Mechanical Properties ◽  
Tensile Stress ◽  
Shear Wave ◽  
Carotid Arteries ◽  
Pearson Correlation ◽  
Shear Wave Elastography ◽  
Wave Dispersion ◽  
Cerebrovascular Diseases ◽  
Shear Wave Imaging ◽  
Wave Imaging

Abstract Background Arterial remodeling reflects adaptation of the vessel wall to mechanical and hemodynamic stimuli and contributes to the progression of cardiovascular and cerebrovascular diseases. Tensile stress (TS) is one of the mechanical properties of the artery wall. We sought to investigate the effects of carotid viscoelasticity on its tensile stress (TS) in different age subjects.Methods Forty-five subjects were recruited and divided into the group1 (≥50 years old) and the group2 (<50 years old) according to the median age. The carotid arteries were examined by ultrasonography, including shear wave elastography (SWE), shear wave dispersion (SWD) and radiofrequency (RF) technologies. The values were obtained, including the carotid elastic modulus (SWE R ) and viscous index (SWD R ), as well as the peak and mean TS of the left and right carotid arteries (L-PTS, R-PTS, L-MTS and R-MTS). The correlations between SWE R , SWD R and tensile stress were investigated, respectively.Results In the group1, the carotid arteries had lower SWE R and SWD R than those in the group2 (SWE R , [10.29±9.57] kPa vs. [17.24±14.07] kPa; SWD R [11.99±3.51] (m/s)/kHz vs. [13.97±3.71] (m/s)/kHz, all P values < 0.05). In addition, the R-PTS was also lower in the group 1 ( P <0.05). Pearson correlation analysis showed that the carotid SWE R was positively correlated with tensile stress. R -values for R-PTS, R-MTS, L-PTS and L-MTS were r =0.218, r =0.359, r =0.209 and r =0.369, respectively (all P <0.05). However, the carotid SWD R was not significantly associated with TS.Conclusion Ultrasonic shear wave imaging could be used to quantitatively assess carotid viscoelasticity. The carotid TS was related to its elasticity while little related to its viscosity, suggesting that mechanical properties of the arterial wall might be better revealed.

Group Shear Wave Speed Viscoelastic Analysis using 3D Rotational Volumetric Shear Wave Imaging in Relaxed and Contracted in vivo Muscle

2021 ◽  
Author(s):  
Courtney A. Trutna ◽  
Anna E. Knight ◽  
Felix Q. Jin ◽  
Ned C. Rouze ◽  
Laura S. Pietrosimone ◽  
...  
Keyword(s):  
Shear Wave ◽  
Wave Speed ◽  
Shear Wave Speed ◽  
Shear Wave Imaging ◽  
Viscoelastic Analysis ◽  
Wave Imaging

In vivo study of cerebral ischemia using Shear Wave Imaging and Ultrafast Doppler

2010 ◽  
Author(s):  
Emilie Mace ◽  
Gabriel Montaldo ◽  
Mathias Fink ◽  
Mickael Tanter ◽  
Abraham Martin ◽  
...  
Keyword(s):  
Cerebral Ischemia ◽  
Shear Wave ◽  
In Vivo Study ◽  
Shear Wave Imaging ◽  
Wave Imaging

In Vivo Mapping of Brain Elasticity in Small Animals Using Shear Wave Imaging

2011 ◽  
Vol 30 (3) ◽  
pp. 550-558 ◽  
Author(s):  
E Macé ◽  
I Cohen ◽  
G Montaldo ◽  
R Miles ◽  
M Fink ◽  
...  
Keyword(s):  
Shear Wave ◽  
Small Animals ◽  
Shear Wave Imaging ◽  
Wave Imaging

Evaluation of the Effect of Tissue Compression on the Results of Shear Wave Elastography Measurements

2018 ◽  
Vol 40 (6) ◽  
pp. 380-393 ◽  
Author(s):  
Jaromir Vachutka ◽  
Zuzana Sedlackova ◽  
Tomas Furst ◽  
Miroslav Herman ◽  
Jan Herman ◽  
...  
Keyword(s):  
Young’S Modulus ◽  
Shear Wave ◽  
Ex Vivo ◽  
Young's Modulus ◽  
Shear Wave Elastography ◽  
Shear Wave Imaging ◽  
Phantom Measurements ◽  
Wave Imaging ◽  
Tissue Compression

Shear wave imaging is considered to be more precise and less operator dependent when compared with strain imaging. It enables quantitative and reproducible data (Young’s modulus of the imaged tissue). However, results of shear wave imaging can be affected by a variety of different factors. The aim of this study is to evaluate the effect of the pressure applied by the ultrasound probe during examination on the measured values of Young’s modulus. The effect of the tissue compression on the results of the real-time shear wave elastography was evaluated via the gelatine phantom measurements, via the ex vivo experiments with pig liver, and via the in vivo measurements of the thyroid gland stiffness on healthy volunteers. The results of our measurements confirmed that the measured value of Young’s modulus increases with the increasing pressure applied on the imaged object. The highest increase was observed during the ex vivo experiments (400%), and the lowest increase was detected in the case of the phantom measurements (8%). A two- to threefold increase in Young’s modulus was observed between the minimum and maximum pressure in the case of the in vivo elastography measurements of thyroid gland. The Veronda-Westman theoretical model was used for the description of the tissue nonlinearity. We conclude that tissue compression by the force exerted on the probe can significantly affect the results of the real-time shear wave elastography measurements. Minimum pressure should be used when measuring the absolute value of Young’s modulus of superficial organs.

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