Radiosurgery (SRS) and radiotherapy (SBRT) are both forms of stereotactic treatment. Both deliver radiation but use different means and doses to minimize the risk of radiation damage to healthy tissue. This non-surgical procedure uses highly focused x-rays to treat certain types of tumors and inoperable lesions. Our linear accelerator can perform radiosurgery on a tumor in a single session or during multiple sessions, which is called stereotactic radiotherapy. The machine rotates around the patient, delivering radiation beams from different angles. It uses special equipment to position the patient and precisely deliver the radiation.
SBRT delivers large doses of radiation in five treatment sessions over several weeks. SRS delivers radiation in single high doses that conform closely to the tumor shape and fall off sharply at the edge of the tumor. Whether a patient receives standard radiotherapy or a form of radiosurgery depends on the type of tumor and its location.
Stereotactic Body Radiotherapy (SBRT)
Stereotactic Body Radiotherapy (SBRT) delivers large doses of radiation in five treatment sessions over a few weeks. Whether a patient receives standard radiotherapy or a form of radiosurgery depends on the type of tumor and its location.
Stereotactic Radiosurgery (SRS)
Stereotactic Radiosurgery (SRS) treats complex cancers with a precise delivery of a single, high dose of radiation in a one-day session. It has such a dramatic effect in the target zone that the changes are considered "surgical." Through the use of 3D computer-aided planning and the high degree of immobilization, the treatment can minimize the amount of radiation that passes through healthy tissue.
SRS is routinely used to treat brain tumors, spine and lesions. It may be the primary treatment used when a tumor is inaccessible by surgical means, or as a boost to other treatments for a recurring tumor.
How it works
SRS works the same as all other forms of external beam radiation treatment. It does not remove the tumor or lesion, but it distorts the DNA of the tumor cells. The cells then lose their ability to reproduce and retain fluids.
Learn more about the treatment machines: Trilogy and TrueBeam linear accelerators.