I did have it twice, at Swedish Cherry Hill in Seattle; and no I did not use up my lifetime supply of radiation eligibility after the first round. If I remember right from 13 years ago, the first round was a total of 50 Gy spread out over five fractions (treatment days). The second round 8 years later was a lower dosage of 38 Gy over the same five fractions. At this point I cannot have any further radiation of the prostate, mostly due to the buildup of radiation scarring, and would have to go chemo from here. However, if I were to have any metastases elsewhere in my body I could still go back for more radiation. Hope that layman's explanation helps...