scholarly journals HELLP syndrome: An ultrasound case of geographically altered liver parenchymal echogenicity with shear wave elastography, shear wave dispersion and attenuation imaging correlation

2019 ◽  
Vol 23 (2) ◽  
pp. 149-155
Author(s):  
Andrea Mould ◽  
Steven Abbott ◽  
Christopher J. Welman
Keyword(s):  
Shear Wave ◽  
Hellp Syndrome ◽  
Shear Wave Elastography ◽  
Wave Dispersion ◽  
Liver Parenchymal ◽  
Attenuation Imaging ◽  
Altered Liver ◽  
Dispersion And Attenuation

scholarly journals Shear Wave Elastography and Shear Wave Dispersion Imaging in the Assessment of Liver Disease in Alpha1-Antitrypsin Deficiency

Diagnostics ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 629
Author(s):  
Marten Schulz ◽  
Moritz Kleinjans ◽  
Pavel Strnad ◽  
Münevver Demir ◽  
Theresa M. Holtmann ◽  
...  
Keyword(s):  
Liver Disease ◽  
Shear Wave ◽  
Transient Elastography ◽  
Liver Steatosis ◽  
Shear Wave Elastography ◽  
Wave Dispersion ◽  
Suitable Method ◽  
Antitrypsin Deficiency ◽  
Alpha1 Antitrypsin ◽  
Attenuation Imaging

Liver affection of Alpha1-antitrypsin deficiency (AATD) can lead to cirrhosis and hepatocellular carcinoma (HCC). A noninvasive severity assessment of liver disease in AATD is urgently needed since laboratory parameters may not accurately reflect the extent of liver involvement. Preliminary data exist on two-dimensional shear wave elastography (2D-SWE) being a suitable method for liver fibrosis measurement in AATD. AATD patients without HCC were examined using 2D-SWE, shear wave dispersion imaging (SWD) and transient elastography (TE). Furthermore, liver steatosis was assessed using the controlled attenuation parameter (CAP) and compared to the new method of attenuation imaging (ATI). 29 AATD patients were enrolled, of which 18 had the PiZZ genotype, eight had PiMZ, two had PiSZ and one had a PiZP-Lowell genotype. 2D-SWE (median 1.42 m/S, range 1.14–1.83 m/S) and TE (median 4.8 kPa, range 2.8–24.6 kPa) values displayed a significant correlation (R = 0.475, p < 0.05). 2D-SWE, ATI (median 0.56 dB/cm/MHz, range 0.43–0.96 dB/cm/MHz) and CAP (median 249.5 dB/m, range 156–347 dB/m) values were higher in PiZZ when compared to other AATD genotypes. This study provides evidence that 2D-SWE is a suitable method for the assessment of liver disease in AATD. The newer methods of SWD and ATI require further evaluation in the context of AATD.

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.

Tu1606 QUANTITATIVE EVALUATION OF TREATMENT EFFECT USING SHEAR WAVE ELASTOGRAPHY AND SHEAR WAVE DISPERSION IN AUTOIMMUNE PANCREATITIS

2020 ◽  
Vol 158 (6) ◽  
pp. S-1135
Author(s):  
Hirotaka Suzuki ◽  
Hiroki Kawashima ◽  
Eizaburo Ohno ◽  
Takuya Ishikawa ◽  
Masanao Nakamura ◽  
...  
Keyword(s):  
Shear Wave ◽  
Quantitative Evaluation ◽  
Treatment Effect ◽  
Autoimmune Pancreatitis ◽  
Shear Wave Elastography ◽  
Wave Dispersion

scholarly journals Shear-Wave Dispersion Slope from US Shear-Wave Elastography: Detection of Allograft Damage after Liver Transplantation

Radiology ◽  
2019 ◽  
Vol 293 (2) ◽  
pp. 327-333 ◽  
Author(s):  
Dong Ho Lee ◽  
Jae Young Lee ◽  
Jae Seok Bae ◽  
Nam-Joon Yi ◽  
Kwang-Woong Lee ◽  
...  
Keyword(s):  
Liver Transplantation ◽  
Shear Wave ◽  
Shear Wave Elastography ◽  
Wave Dispersion ◽  
Dispersion Slope

scholarly journals Shear wave elastography and shear wave dispersion imaging in primary biliary cholangitis—a pilot study

2021 ◽  
Vol 0 (0) ◽  
pp. 0-0
Author(s):  
Marten Schulz ◽  
Anne-Christin B. Wilde ◽  
Münevver Demir ◽  
Tobias Müller ◽  
Frank Tacke ◽  
...  
Keyword(s):  
Pilot Study ◽  
Shear Wave ◽  
Shear Wave Elastography ◽  
Wave Dispersion ◽  
Primary Biliary Cholangitis
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