Varian Edge

Varian Edge is a dedicated radiosurgery system built around a linear accelerator, a machine that produces high-energy radiation beams. It is designed for the most precise forms of external radiotherapy, where a high dose is shaped to the exact contour of a small, well-defined target and delivered in a single session or a handful of sessions. For brain targets it allows frameless cranial radiosurgery, meaning the older rigid head frame screwed to the skull is no longer required, and instead a comfortable mask holds the head gently in place. The same platform performs precise body radiotherapy for tumours elsewhere. Nothing is left inside the body, and there is no incision and no surgical wound.

Before treatment, the team builds a detailed three-dimensional plan from your scans, outlining the target and the healthy structures nearby so the beams can be aimed with great accuracy. During a session you lie still while the machine moves around you and delivers many narrow beams from different angles; the dose builds up where they cross inside the target, while each healthy area receives only a small share. Built-in imaging and an optical surface monitoring system continuously watch your position, and for moving targets the platform can track the tumour and follow breathing. If movement exceeds a tiny threshold, the beam holds automatically, keeping accuracy within a fraction of a millimetre. You feel nothing during the beam itself.

Varian Edge is used for brain tumours and brain metastases, and for tumours of the spine, lung, liver, prostate and other sites, as well as some benign lesions. Its focused, high-dose approach suits small, well-defined targets, including those close to sensitive structures where sparing nearby tissue matters most. It can be a primary treatment, a way to treat lesions that are difficult to reach with surgery, or part of a broader plan alongside surgery and drug therapy. Whether this approach is right, and on what schedule, always depends on the individual diagnosis. A radiation oncologist decides the plan after reviewing your case and imaging, and individualises every detail.

The main benefits are precision and gentleness: tightly focused, image-guided beams deliver a high dose to the target while limiting exposure to healthy organs, which can mean fewer and milder side effects. Treatment is non-invasive and given on an outpatient basis, so there is no surgery, no anaesthesia and usually no hospital stay, and most people go home the same day. A course is short, often one to a few sessions, and many people keep up their normal routine throughout. Side effects, when they occur, are usually mild and limited to the treated area, and your care team explains what to expect and monitors you closely.