Gamma Knife
What is Gamma Knife ICON™
Icon is a dedicated radiosurgery system used to treat a broad range of brain disorders with the lowest dose to normal healthy tissue. Icon is equipped with integrated stereotactic Cone Beam CT (CBCT) imaging and software to continuously control the dose delivery. The system enables multiple or single sessions, frameless and frame-based immobilization.
Gamma Knife ICON offers several procedural options depending on the size and number of lesions, location, histopathology, and previous irradiation, etc.
GAMMA KNIFE
How Gamma Knife works
A Gamma Knife is not a knife. Instead, it uses 192 focused radiation beams to target the smallest and most challenging brain tumours or other abnormalities in the brain. It does this with extreme precision, while safeguarding healthy tissue and organs.
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Gamma Knife Treatment
Typical one-day procedure
Step-by-step guide to understanding Gamma Knife treatment.
Depending on the clinical situation, the steps of the procedure may vary.
Before Treatment
Consultation
Before the day of treatment, patients are informed about the entire procedure, including the fact that Gamma Knife radiosurgery does not require cutting or shaving a patient’s hair.
The Day of Treatment
1. Stabilization
When a patient arrives for treatment, a thermoplastic mask is placed over the face or a lightweight frame is attached to the head. This prevents movement during treatment and allows the doctor to accurately locate and treat targets in the brain with microscopic precision.
2. Defining the Target
A preoperative MRI image with 1-2 mm thickness is performed to locate the exact position of the target or multiple targets to be treated. Gamma Knife stereotactic immobilization of the head ensures stability and accuracy to within 0.3 mm.
3. Treatment Planning
Once diagnostic images that pinpoint the exact location to be treated have been taken, the Gamma Knife team develops a customized treatment plan using a highly specialized planning system. Every treatment plan is uniquely created to individually address a patient’s specific medical condition .
4. Treatment
Before treatment begins, a patient is positioned on the Gamma Knife couch. The patient is awake during treatment and can communicate with the doctor or nurse through an audio and video connection at all times. When treatment begins, the couch moves into the dome of Gamma Knife. Gamma Knife is silent, so during treatment, patients often listen to music or fall asleep. Treatment can last a few minutes or more than an hour, depending on the number of targets, as well as the size and shape of each target. Patients are monitored at all times during the procedure.
5. Post Treatment
When treatment has ended, the thermoplastic mask or head frame is removed. Some patients may experience a mild headache or minor swelling where the head frame was attached. Typically patients go home soon after Gamma Knife radiosurgery and return to their normal routine in a day or so.
Weeks Later
Follow Up
Gamma Knife radiosurgery is designed to control or eliminate your clinical indication. The effects will be seen over a period of weeks or months. Physicians stay in contact with patients to monitor their progress, which may include follow-up MRI, CT or angiography images.
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