Factors other than fibrosis that increase measured shear wave velocity  

作　　者：Hiroko Naganuma Hideaki Ishida 

机构地区：[1]Department of Gastroenterology,Yokote Municipal Hospital,Yokote 013-8602,Japan [2]Department of Gastroenterology,Akita Red Cross Hospital,Akita 010-1495,Japan

出　　处：《World Journal of Gastroenterology》2022年第46期6512-6521,共10页世界胃肠病学杂志（英文版）

摘　　要：Shear wave elastography(SWE)is now becoming an indispensable diagnostic tool in the routine examination of liver diseases.In particular,accuracy is required for shear wave propagation velocity measurement,which is directly related to diagnostic accuracy.It is generally accepted that the liver shear wave propagation velocity reflects the degree of fibrosis,but there are still few reports on other factors that increase the shear wave propagation velocity.In this study,we reviewed such factors in the literature and examined their mechanisms.Current SWE measures propagation velocity based on the assumption that the medium has a homogeneous structure,uniform density,and is purely elastic.Otherwise,the measurement is subject to error.The other(confounding)factors that we routinely experience are primarily:(1)Conditions that appear to increase the viscous component;and(2)Conditions that appear to increase tissue density.Clinically,the former includes acute hepatitis,congested liver,biliary obstruction,etc,and the latter includes diffuse infiltration of malignant cells,various storage diseases,tissue necrosis,etc.In any case,it is important to evaluate SWE in the context of the entire clinical picture.

关 键 词：Liver Shear wave elastography Propagation velocity VISCOELASTICITY ARTIFACT Ultrasound 

分 类 号：R575[医药卫生—消化系统]