SRS, SRT, SBRT

SRS, SRT, SBRT

Stereotactic Radiosurgery (SRS) is a non-surgical radiation therapy used to treat functional abnormalities and small tumors of the brain. It can deliver precisely-targeted radiation in fewer high-dose treatments than traditional therapy, which can help preserve healthy tissue. It is used to treat many types of brain tumors including benign and malignant, primary and metastatic, single and multiple, residual tumor cells following surgery, intracranial, orbital and base-of-skull tumors, arteriovenous malformations (AVMs), trigeminal neuralgia, etc.

Stereotactic Body Radiotherapy (SBRT) is the procedure in which SRS is being applied for treatment of body tumors. SBRT is currently used and/or being investigated for use in treating malignant or benign small-to-medium size tumors in the body and common disease sites, including the: lung, liver, abdomen, spine, prostate and head and neck. SRS fundamentally works in the same way as other forms of radiation treatment. It does not actually remove the tumor; rather, it damages the DNA of tumor cells.
Both SRS and SBRT rely on several technologies like highly focused gamma-ray or x-ray beams that converge on a tumor or abnormality and systems to immobilize and carefully position the patient and maintain the patient position during therapy.

Stereotactic Radiotherapy (SRT) is a high-precision irradiation technique in which SRS is used with conventional fractionation regimen. It uses multiple, non-coplanar photon radiation beams, and deliver a high dose of radiation to stereo tactically localized lesions, applying frame-based and frameless techniques.