They will occasionally (at regular intervals) take an x-ray of the site that is being radiated to confirm that the radiation is indeed being confined to the area designated for treatment. These are done with the custom lead blocks in place that control the radiation pattern so the doctors can see the actual physical limits and structures involved in getting the dose of radiation. It is completely normal and is part of the checks and balances of getting radiation treatment.

Brian, stage 4 oral cancer survivor. OCF Founder and Director. The first responsibility of a leader is to define reality. The last is to say thank you. In between, the leader is a servant.