Why were you having the scan?
How much do you weigh?
Do you know the result of your liver function tests? ( blood tests).
A raised AST and ALT is consistent with "hepatitis" - do not panic - hepatitis simply means inflammation of the liver.
The most common cause is a build up of fatty tissue in the liver - "fatty liver." - and the fact that your ALT came down with weight loss would be consistent with that diagnosis.
Your Dr should have done a screen for infections - hep B, C etc already.
I expect the specialist will repeat your bloods and have a look at your scan - he may well be happy to leave it at that or may want to do a liver biopsy if the diagnosis is uncertain.
Your use of anabolic steroids may have aggravated this problem - I expect that you will avoid them in the future.
Please let me know if anything is not clear.