I had the thyrogen shots in February with no LID. I had the shots on Monday and Tuesday, blood work on all days, and a scan on Friday. The scan showed I still had residual thyroid tissue so I had to have a second round of RAI (this came from my oncologist). In 6 mos. I will go through it again; once they show no signs of residual thyroid tissue, they will go based on the thyroglobulin levels... I don't anticipate any other scans after the next one.