Wrong. Radiogel is at best a potential cure if the primary tumor hasn't spread. And one won't know if the primary tumor hasn't spread until years after treatment. Just read the reports where animal tumors recurred following IsoPet treatment.
Best odds of success for a stage 1 tumor treated with Radiogel would be in combination with neoadjuvant and/or adjuvant therapy. Even then, one won't know if the treatment cured the cancer until years down road.