Multiple non calcified lung nodules?

Have multiple noncalcified lung nodules. Initially found during heart scan 4 yrs ago. I stopped smoking at that time and none since. Have had CT scans every 6 months since then including one PET scan. All have come back "no change". My doctor continues to recommend scans every 6 months. When I ask him why he says, "we need to make sure there is no growth". How much longer will I need to have these scans?

If the non-calcified nodules seen on screening were confirmed and were non-calcified on the diagnostic CT, further work-up was recommended, depending on the size (average of length and width) of the nodule:
nodules 5 mm or less: follow up with high resolution CT scans at 3 mos, 6 mos, 12 mos and 24 mos as long as there was no growth.

http://www.journalclub.org/vol2/a71.html

If a nodule is found on a screening CT scan, than a decision is made to either biopsy the nodule if it appears suspicious for cancer, or to repeat a CT scan within 6 to 12 weeks to determine if the nodule has grown. Should the nodule grow, this is highly suspicious for malignancy, and a recommendation to biopsy the nodule is warranted. If on the other hand the nodule remains stable in size, and does not change, then continued observation is recommended.

http://www.columbiasurgery.org/divisions...

As long as your doctor tells you to.