Gamma Knife® Radiosurgery

Gamma Knife® is a type of stereotactic radiosurgery. Although it may sound like surgery – it isn’t. Rather, it is a type of radiation therapy that delivers beams of high-dose radiation from multiple angles to precisely target and destroy tumors.

At the Swedish Radiosurgery Center in Seattle, our radiosurgery team uses Gamma Knife to treat cancerous and noncancerous tumors in the brain, head and neck. Gamma Knife may also used to treat neurological conditions, such as arteriovenous malformations, essential tremor and trigeminal neuralgia.

With Gamma Knife, there is no scalpel, no general anesthesia and no hospital stay. Patients usually wear street clothes during their treatments and return to their normal activities when their treatments have been completed.

Appointments & Referrals

Call us at 206-320-7130 if you want help finding a physician certified in Gamma Knife, or to schedule an appointment for a consultation.


The video below provides an overview of Gamma Knife and what you can expect during a Gamma Knife procedure.

The Gamma Knife delivers 192 beams of radiation from multiple angles to a specific target with pinpoint accuracy while avoiding damage to the surrounding tissue through which the beams travel. Patients are treated in our outpatient center during a single treatment session with minimal, if any side effects.

Gamma Knife benefits

  • Preserves healthy tissue surrounding the target area
  • Non-invasive procedure
  • No general anesthesia
  • Outpatient procedure
  • Planning & Treatment on the same day
  • Few, if any, side effects

Learn about the conditions treated with Gamma Knife

Learn how Gamma Knife works

Learn more about the Treatment Process

Meet our Radiosurgery Team