SRS/SRT
Home > SRS/SRT
Our Treatments
SRS/SRT
Stereotactic Radiosurgery (SRS)
- Definition: A non-invasive radiation therapy that delivers a single, high-dose radiation beam to a precisely targeted area, typically within the brain or spine.
- Indications: Brain metastases, arteriovenous malformations (AVMs), meningiomas, acoustic neuromas, and some functional disorders (e.g., trigeminal neuralgia).
- Dose: Delivered in a single fraction.
- Precision: Sub-millimeter accuracy using stereotactic localization (frame-based or frameless systems).
- Delivery Systems: Gamma Knife, CyberKnife, Linear accelerators (LINAC-based systems like TrueBeam).
Stereotactic Radiotherapy (SRT) / Fractionated SRT (FSRT)
- Definition: Similar to SRS but the radiation is divided into multiple smaller fractions over several sessions.
- Indications: Tumors near critical structures or larger lesions that cannot tolerate a single high dose.
- Dose: Typically delivered in 3–5 fractions, but sometimes more.
- Advantage: Reduced risk of toxicity to nearby normal tissues by spreading out the dose.
Feature
SRS
SRT
Dose per session
High (single fraction)
Lower (multiple fractions)
High (single fraction)
1
3–5 (or more)
Lower (multiple fractions)
Brain, spine
Brain, spine, sometimes body
Total number of sessions
Small, well-defined targets
Larger/complex targets