There is a new clinical trial you may want to ask your MO about
. It is for this exact case.https://clinicaltrials.gov/ct2/show/nct04720157
Basically the theory is the same radionuclides they use for the PSMA scans are used to carry microdoses of radiation to wherever the cancer may and the radiation wipes out the small pockets of cells before they get out of control.
This tech is used often much later when cancer becomes resistant to hormone therapy but they are trying to see if it will be more effective if applied sooner.