Your radiotherapy treatment plan is individual to you. You have a scan, usually a CT scan, to create your radiotherapy plan.
Your radiotherapy team carefully work out how much radiation you need to treat the cancer and exactly where you need it.
Skin markings, such as tattoos, help make sure you have external radiotherapy in exactly the right place every time you have treatment. Your radiographer can mark your skin in different ways.
You might have moulds or masks made for you before you start radiotherapy. Find out about the different types and how they're made.
The radiotherapy team will create a treatment plan for you. This involves using scans to work out exactly where to treat and how many radiation beams you need.