A liver elastography is a noninvasive procedure that doctors use to determine the health of a person’s liver. The procedure assesses the thickness and elasticity of liver tissue, with thicker and less elastic tissue indicating fibrosis. This condition limits blood flow to the liver, impairing its function. Liver elastography involves measuring the time it takes for low frequency vibrations to pass through the liver. Areas of scarring slow down the vibrations, so they pass through less quickly than they would in a healthy liver.