Ultrasound shear wave elastography (SWE) is widely regarded as one of the preferred imaging methods for quantitative assessment of liver hardness and disease staging. However, the implementation of its technology is based on an idealized homogeneous elastic model that considers liver parenchyma. SWE ignores tissue viscosity characteristics in algorithms used to quantify liver elasticity, which has certain limitations in evaluating patients with chronic liver disease such as inflammation or steatosis. Shear wave dispersion imaging (SWD) can obtain a parameter directly related to viscosity: actual dispersion quantification shear wave dispersion imaging (SWD) can obtain a parameter directly related to viscosity: actual dispersion quantification, dispersion quantification parameters can be used to evaluate liver tissue viscosity and related shear wave velocity dispersion. Previous studies have shown that shear wave velocity is more useful than dispersion slope in predicting the degree of liver fibrosis, but dispersion slope is more diagnostic than shear wave velocity in predicting the degree of necrotizing inflammation and fat deposition. Therefore, we can better describe the mechanical properties of the liver by measuring the slope of shear wave dispersion. We can use dispersion slope to predict the degree of necrotizing inflammation, detect allograft damage after liver transplantation, and differentiate between benign and malignant liver focal diseases. In the staging of liver fibrosis, dispersion slope can also be used to assist in excluding significant liver fibrosis and diagnosing cirrhosis. I believe that in the future, SWD may become the preferred imaging method for quantifying and staging diffuse and focal liver lesions.