Follow up scans/what NCI says!

My oncologist and I were talking about follow up scans and he said that the NCI now says scans once year is sufficient because they are not really very accurate. Too many recurrences after the scans give a clear picture. I told him that I wanted them every 6 months and he agreed with me. We need some piece of mind even if its only for a few weeks or months. I wonder now if the insurances will starting saying its not necessary and stop paying. My doctor says that all the big research hospitals belong to NCI and that is where the others get their data from. Has anyone heard this? For me I don't think it will be a problem getting them every 6 months but for some it may be. Sure is scary. Hugs, Sandy