If you are having radiotherapy for a brain tumour or a head and neck cancer you will need to wear a mesh mask. The mask helps to keep your head still and makes beating cancer easier by making the treatment target the cancer cells. Learn how a mesh mask is made. This is a Cancer Research UK video.
Learn more about radiotherapy masks: http://www.cancerresearchuk.org/cancer-help/about-cancer/treatment/radiotherapy/external/plan/radiotherapy-moulds