Most chronic liver diseases such as alcohol related liver disease, non-alcoholic fatty liver, chronic hepatitis B and C lead to progressive liver damage. With increasing liver damage, the liver develops scarring or fibrosis that makes the liver firm.
A Fibroscan is a type of scan that can measure the stiffness of your liver, which in turn reflects the degree of /fibrosis in your liver. It is a simple, non-invasive and painless test which gives immediate results. It is the single most accurate bedside measurement of severity of chronic liver disease.
Other Resources
You can also read more about fibroscan by clicking the following links.
https://patient.info/digestive-health/abnormal-liver-function-tests-leaflet/liver-biopsy
https://www.uptodate.com/contents/liver-biopsy-beyond-the-basics