It's still early. PEzt's are usualy usually done no Zearliet than 12 weeks. I hadno one at 5 months, and still showed false postive. CT and MRI are not as reactive, sensitive like the PET, which relies on glucose activity, and often times are used instead of PET, for earlier diagnostics due to high false positives in PET, as mentined. None of my cancers were ever found during my scopes, and only after a direct biopsy was done during the largynoscope or FNAB. There are other radiation, surgical techniques like laser surgery, brachtherspy, and IORT..intraopertive radiation therapy, both of which are good in previously irridatec areas. They usually incorporates resection, EBRT, possibly a flap, and maybe more EBRT after, Reirridation, robotic surgery. Hopfully, it's all clear.