Department of Gastroenterology,Yokote Municipal Hospital,Yokote 0138602,Akita,Japan;
Department of Gastroenterology,Akita Red Cross Hospital,Kamikitatesaruta 0101495,Akita,Japan;
Department of Gastroenterology,Oomori Municipal Hospital,Yokote 0130525,Akita,Japan;
New Generation Imaging Laboratory,Tokyo 1680065,Japan;
Division of Gastroenterology and Hepatology,Iwate Medical University,Morioka 0200023,Iwate,Japan;
Department of Gastroenterology and Hepatology,Nihon University Hospital,Chiyoda 1018309,Tokyo,Japan;
Two-dimensional shear wave elastography; Ultrasound; Artifacts; Liver cirrhosis; Liver tumor; Computer simulation model;