FibroScan non-invasive liver fibrosis diagnostic device instrument is a liver fibrosis diagnostic device with global patent protection launched by the French company Echosens. Its principle is to determine the stiffness of the liver by measuring the propagation speed of low-frequency oscillation waves in liver tissue fibers, so as to assess the number of fibers present in the liver, that is, the degree of fibrosis. FibroScan has become the most advanced non-invasive liver fibrosis diagnostic and assessment instrument in the world, which has greatly improved the detection rate of liver fibrosis and cirrhosis in patients. FibroScan is suitable for the examination of liver fibrosis and cirrhosis caused by various chronic liver diseases, including viral hepatitis, alcoholic hepatitis, non-alcoholic steatohepatitis and autoimmune liver disease. FibroScan like ultrasound, its greatest advantage is non-invasive, and can quickly make a diagnosis of liver fibrosis with high accuracy and reproducibility, completely avoiding the trauma caused by liver puncture. the accuracy of FibroScan on the classification of fibrosis stages of diagnosis (AUPOC) in more than 80%.