Viscoelasticity Measured by Shear Wave Elastography in a Rat Model of Nonalcoholic Fatty Liver Disease: Comparison With Dynamic Mechanical Analysis
| Autor: | Xinyu Zhang, Guoqiang Liu, Xianfen Diao, Xin Chen, Hui Xia, Siping Chen, Yanrong Guo, Mengke Wang, Haoming Lin, Zhaoke Pi, Jie Zeng |
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| Rok vydání: | 2020 |
| Předmět: |
Male
medicine.medical_specialty Correlation coefficient Biomedical Engineering 01 natural sciences Gastroenterology Viscoelasticity Biomaterials 03 medical and health sciences 0302 clinical medicine Non-alcoholic Fatty Liver Disease Fibrosis Internal medicine 0103 physical sciences Nonalcoholic fatty liver disease medicine Medical technology Animals Radiology Nuclear Medicine and imaging R855-855.5 010301 acoustics Dynamic mechanical analysis Radiological and Ultrasound Technology medicine.diagnostic_test Viscosity Research General Medicine medicine.disease Rats Liver Shear wave elastography Elasticity Imaging Techniques 030211 gastroenterology & hepatology Elastography Steatosis Steatohepatitis |
| Zdroj: | BioMedical Engineering OnLine, Vol 20, Iss 1, Pp 1-16 (2021) BioMedical Engineering |
| Popis: | Background Nonalcoholic fatty liver disease (NAFLD) is rapidly becoming one of the most common liver diseases. Ultrasound elastography has been used for the diagnosis of NAFLD. However, clinical research on steatosis by elastography technology has mainly focused on steatosis with fibrosis or non-alcoholic steatohepatitis (NASH), while steatosis without fibrosis has been poorly studied. Moreover, the relationship between liver viscoelasticity and steatosis grade is not clear. In this study, we evaluated the degree of liver steatosis in a simple steatosis rat model using shear wave elastography (SWE). Results The viscoelasticity values of 69 rats with hepatic steatosis were measured quantitatively by SWE in vivo and validated by a dynamic mechanical analysis (DMA) test. Pathological sections were used to determine the steatosis grade for each rat. The results showed that the elasticity values µ obtained by the two methods followed the same trend, and µ is significantly correlated with liver steatosis. The Pearson’s correlation coefficients indicate that $$\mu$$ μ obtained by SWE is positively linear correlated with DMA (r = 0.628, p = 7.85 × 10–9). However, the viscosity values $$\eta$$ η obtained by SWE were relatively independent of those obtained by DMA with a correlation coefficient of − 0.01. The combined Voigt elasticity measurements have high validity in the prediction of steatosis (S0 vs. S1–S4), with an AUROC of 0.755 (95% CI 0.6175–0.8925, p Conclusion SWE might have the feasibility to be introduced as an auxiliary technique for NAFLD patients in clinical settings. However, the viscosity results measured by SWE and DMA are significantly different, because the two methods work in different frequency bands. |
| Databáze: | OpenAIRE |
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