The radiation mask: what it's for and how to cope

If you are having radiation to the head or neck, you will be fitted with a mask. NCI describes it as fitted, with air holes, and attaching to the treatment table.

The fitting happens at a planning session called simulation. NCI explains that at simulation, a radiation oncologist and a radiation therapist work out the treatment area using imaging scans while you stay still.

For radiation aimed elsewhere on the body, a different device may be used. NCI describes a body mold as a plastic or plaster form that keeps you from moving during treatment.

Staying perfectly still is hard for anyone. NCI says treatment is usually given once a day, five days a week, Monday through Friday. Positioning devices help you lie the same way each time.

NCI describes a body mold as a form that keeps you from moving during treatment. The mask serves the same purpose for the head and neck.

The device is there to support accurate treatment, not to restrain you for someone else's convenience.

For a lot of people, a mesh mask clipped to a table is the hardest part of radiation. Not the treatment itself. The mask.

That reaction is not weakness. Being held in place, unable to turn your head, in a room where everyone else has left, is an unusual experience for an adult body to have.

Tell your team if you are worried about it. It is a fair thing to raise.

The single most useful thing you can do is raise it early.

NCI says you will have a 1- to 2-hour meeting with your doctor or nurse before radiation begins. That conversation is the place to say: I think I am going to struggle with the mask.

Raised in advance, your team has time to plan with you.

These are practical suggestions rather than instructions from NCI, and your own team will have their own approach.

• Ask to hold the mask before it goes on. Understanding the shape and the air holes changes how it feels.
• Ask about the signal. There is always a way to tell the team to stop. Know it before you need it.
• Ask whether you can keep your eyes closed the whole time. Many people find that easier than looking through mesh.
• Ask about music. NCI mentions headphones with music or recorded books while you wait, so ask what is allowed during treatment.
• Ask how long. A defined number of minutes is far easier to endure than an unknown stretch.

Counting your own breaths, or working through a familiar list in your head, gives your mind a job. Whatever you use, use the same thing every session so it becomes routine.

You are alone in the room, but you are not unobserved. NCI says the therapist watches you on a TV screen or through a window and talks with you through a speaker. Ask your team before the first session how they will watch and hear you, and how you can signal them to stop. Knowing the plan can make the room feel less lonely.

Ask your team how the mask will be used across your course. If it feels worse over time, or you feel panic, tell your radiation team right away rather than waiting for the next visit.