Radioactive iodine Tx

Hi everyone. My husband and I have been trying to conceive for 4months. We just found out he has a cyst on his thyroid and needs to have a radioactive iodine treatment, where the doctor said we have to hold off on ttc minimum 6mnths but some wait 12mnths. Has anyone or their partner had this done and how long did you wait to ttc after that? I'm sad but trying to be hopeful. Thanks for your help : )