What is stereotactic radiosurgery (SRS)?

Stereotactic radiosurgery (SRS) is a non-surgical procedure. It was initially developed to treat small brain tumours and functional abnormalities of the brain. SRS is a highly precise form of radiation therapy using the linear accelerator. With this treatment, precisely-targeted radiation can be delivered at much higher doses while minimising the dose to the surrounding healthy tissue. This can be achieved in a single treatment or over a few treatments. The radiation oncologist determines the choice of the fractionation scheme. This treatment is only indicated for certain benign and malignant tumours depending on the size, number, site and type of tumours.