Stereotactic Radiosurgery (SRS) is a non-surgical radiation therapy used to treat abnormalities and small tumors of the brain. SRS can deliver precisely targeted radiation in a high-dose treatment, which helps preserve healthy tissue. The specialized equipment focuses many tiny radiation beams on a target. Each beam has little effect on the tissue it passes through, but a targeted dose of radiation is delivered at the site where the beams intersect. This causes tumors to shrink and blood vessels to close off, eliminating the tumor’s blood supply.
SRS is used to treat both cancerous and non-cancerous conditions. Clinical indications include treatment of arteriovenous malformations (AVM), acoustic neuromas, meningioma, pituitary adenoma, trigeminal neuralgia, brain metastasis and cancerous primary brain tumors.
The precision of SRS means there is minimal damage to healthy surrounding tissues. In most cases, SRS has a lower risk of side effects than traditional surgery or radiation therapy.
Stereotactic Body Radiation Therapy
Stereotactic Body Radiation Therapy (SBRT) is a precise form of radiation therapy delivered by using a linear accelerator (LINAC). The LINAC directs high-energy X-rays or photons to a very specific, targeted area of the body. SBRT allows for a higher dose of radiation to be delivered with fewer treatments or fractions (usually three to five treatments over a five- to ten-day time span) as compared to conventional radiation therapy.
SBRT is not appropriate for treating all tumors. It is appropriate for single or solitary lesions within a specific organ (i.e., lung, spine and kidney). Size and location of the tumor may also be a deciding factor as to whether SBRT is the appropriate choice over conventional external beam radiation therapy. Your radiation oncologist will determine the best treatment based on these factors.
For more information on the Memorial Stereotactic Radiosurgery and Stereotactic Body Radiation Therapy, please call 217-788-3260.