My Husband Had Live Cancer Due To Heppc. He Had

My husband had live cancer due to heppc. He had a 3rd of his liver removed and is normal now with his liver. He had another operation to remove 2 tumors. He starts readiation next week and then nexavar. He jsuit finished Harvoni. His afp levels 3/25/16 were 364. they are now at 2.8 after both surgeries. Our question is this: do they measure the same way for hepp c as the afp levels?