What is radiosurgery?

Stereotactic radiosurgery is a form of radiation therapy that focuses gamma rays or x-rays on a small area of the body. Other types of radiation therapy are more likely to affect nearby healthy tissue. Stereotactic radiosurgery better targets the abnormal area.

It is a medical procedure that allows non-invasive treatment. The initial application of radiosurgery was in treatment of lesions in the brain, a technique also known as stereotactic radiosurgery (SRS). In addition to brain tumours, it has also been shown to be beneficial for the treatment of some non-cancerous conditions, including functional disorders such as arteriovenous malformations (AVMs) and trigeminal neuralgia. Gamma Knife is the most widely used technology for SRS and is considered the gold standard.

Radiosurgery is also used for tumours in other parts of the body (extracranially). This is known as Stereotactic Body Radiation Therapy (SBRT) and is a treatment procedure similar to SRS. A stereotactic radiation treatment for the body means that a specially designed coordinate-system is used for the exact localisation of the tumours in the body to deliver a single high dose radiation treatment or a few fractionated radiation treatments (usually up to 5 treatments). A high potent biological dose of radiation is delivered to the tumour, improving the cure rates for the tumour, in a manner previously not achievable by standard conventional radiation therapy.