You will go to an ordinary xray facility with use of a cat scan or ultrasound
machine a radiologist
certified in liver biopsy
will take a tiny piece of your liver to be examined under a microscope you would be anesthetized and won't feel anything. The highest risk with liver biopsy is bleeding and you should arrange to have someone with you fro 24 hrs after so you can be watched for any complications. this is very rare, but it sounds like a good idea to have it done.