Download or read book YY T 1749 2020 Translated English of Chinese Standard YYT 1749 2020 YY T1749 2020 YYT1749 2020 written by https://www.chinesestandard.net and published by https://www.chinesestandard.net. This book was released on 2021-05-02 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Standard specifies the requirements, test conditions and test methods of external vibration based ultrasonic elasticity measurement equipment for liver tissue. This Standard is applicable to equipment that excites shear waves in liver tissue by externally applying low-frequency vibration and uses the ultrasonic pulse-echo mode to measure the elasticity of liver tissue.