This is very effective targeted therapy using highly specific PET imaging and Lutetium 177 (Lu).
LU 177 PSMA therapy or Prostate-Specific Membrane Antigen Therapy, reduces the size of the tumor and stops them from multiplying.
This therapy is approved in Europe and Australia, is clinical trial in US with positive results. See below link to NCI and Australia sites. There are only few hospitals in US use LU 177 PSMA therapy.
Off course, you need to have big money for it in US , but very cheap in Europe .