Can scarring or cirrosis of liver be diagnosed by ultrasound and mri? I m scared of CT because of radiation.

Liver damage. The MRI is commonly used for soft tissue, so it can be used. Ultrasound can detect gross abnormalities also.
Cirrhosis. This condition can only be suggested by imaging studies, including ct. The only definitive way is by liver biopsy. If, however, there is cirrhosis the secondary effects of that will suggest its presence. You do not need imaging for that except out of curiosity. If you have history of liver damaging conditions and secondary changes, the odds are overwhelming and not sure ct will help anything.