What should you know about gamma ray knife radiation?

Gamma Knife uses many narrow radiation beams that meet at a planned target. Each beam travels through surrounding tissue, while their combined dose is concentrated at the target. Despite its name, this treatment does not involve a surgical cut or removal of tissue. A frame or mask may help keep your head still, and imaging is used to plan the treatment.

It may be considered for some brain tumours, brain metastases, and other small, clearly defined abnormalities. Suitability depends on the target's size, position, number, symptoms, and your general health.

Bring your scan reports and a list of medicines to the radiation oncology appointment. Ask how the target will be located, whether a head frame or mask is planned, and whether treatment will be delivered in one session or several. Discuss expected effects such as tiredness, headache, swelling around the treated area, or temporary skin changes. Your team may prescribe medicine to reduce swelling and arrange follow-up imaging.

Contact your treatment team promptly for worsening headache, repeated vomiting, increasing confusion, a seizure, new weakness, trouble speaking, or changes in vision. Seek emergency help for a seizure that does not stop, sudden severe weakness, or difficulty staying awake.

Which target is being treated, and what is the aim? How will swelling be monitored? When should I arrange follow-up scans? Would whole-brain radiotherapy, brain tumour surgery, CyberKnife, or another approach be more suitable?