At some time between Weeks 22 and 24, then every 3-4 months for up to 2 years after the last IMRT, you will return for follow-up visits. The amount of saliva your parotid glands create will be measured 6 weeks after radiation therapy, 4-6 months after radiation therapy, 1 year (plus or minus 2 months) after radiation therapy, and 2 years (plus or minus 3 months) after radiation therapy.