Why the GT contains no Metal?

[jxhno1]

As we process in clinical situation, mar should be in-painted by just reducing the atifacts radial like, but metal should be stay there, after alg process, no metal is not the real situation?

[hongwang01]

As we process in clinical situation, mar should be in-painted by just reducing the atifacts radial like, but metal should be stay there, after alg process, no metal is not the real situation?

As derived in the paper, the data consistency is executed on the non-metal trace region and we only impose the supervision on the non-metal region. Similar to other works, by default, the metal region is not what we care about. Thanks