stereotactic radiosurgery
A precise radiation therapy technique delivering high-dose radiation to small brain targets in a single session, commonly used for brain metastases.
Full Definition
Stereotactic radiosurgery (SRS) is a specialized form of radiation therapy that delivers precisely focused, high-dose radiation to small, well-defined brain targets in a single treatment session. Despite its name, SRS is not surgical but uses advanced imaging and computer-guided targeting to achieve sub-millimeter accuracy. Common platforms include Gamma Knife, CyberKnife, and linear accelerator-based systems. SRS is particularly effective for treating brain metastases, small primary brain tumors, and arteriovenous malformations. The technique minimizes radiation exposure to surrounding healthy brain tissue while delivering ablative doses to the target lesion.
Usage
Usage note: Abbreviate as SRS after first mention; specify delivery platform (Gamma Knife, CyberKnife, etc.) when relevant.
In Context
- "The patient received Gamma Knife stereotactic radiosurgery for three brain metastases." — radiation oncology note
- "SRS achieved local control in 95% of treated lesions at 12-month follow-up." — clinical outcomes study