The day of your treatment

On the day of your treatment, a lightweight frame will be placed around your head. With the frame in place, you will receive an MRI, CT, or angiography to precisely locate the diseased area to be treated.

A series of images will be taken and transferred to the computerized treatment planning system. The radiosurgery team localizes the target, determines its coordinates, and ensures that the radiation field conforms precisely to the target.

The Gamma Knife will then be used to direct multiple beams of ionizing gamma radiation from 192 separate radioactive cobalt sources to the targeted area within the brain.

Intersecting at the target, the concentrated rays eradicate the tumor or vascular abnormalities while surrounding tissues receive minimal radiation exposure. Treatment sessions typically last 20 to 60 minutes. Patients usually return to normal activities the same day or the following day.