What is the Gamma Knife?
The Gamma Knife is machine that delivers radiation therapy to treat brain disorders, including brain tumours, vascular malformations, and functional disorders (such as trigeminal neuralgia). It delivers a highly focused, high-dose radiation to the target area, minimizing exposure to surrounding healthy tissue. This process is also known as Stereotactic Radiosurgery.
Radiosurgery is often used when traditional surgery is not possible or when a patient wishes to avoid the risks associated with open surgery. It is a highly effective treatment option for many conditions, with a high success rate and low risk of complications. However, it not suitable for all neurosurgical conditions.
How does the Gamma Knife work?
The Gamma Knife uses 192 sources of radioactive cobalt-60 to deliver high-dose radiation to targeted areas in the brain. The beams are shaped to precisely focus on the target while minimizing exposure to surrounding healthy tissue. Depending on the condition being treated, the head is held in place using either a relocatable plastic face mask, or a rigid frame attached to the head.
How long does Gamma Knife treatment take?
Gamma Knife treatments are performed as a day procedure, with patients awake throughout. There are no incisions. Most treatments are performed in a single day, although some tumours may require up to 5 days of treatment.
How can I find out more about the Gamma Knife?
The Gamma Knife is located at Peter MacCallum Cancer Centre, where A/Prof Andrew Davidson is the Lead Neurosurgeon for the Victorian Gamma Knife Service. Your GP can refer you to see A/Prof Davidson at Parkville Neurosurgery to discuss whether Gamma Knife is an option for your condition.
