SBRT
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SBRT
Stereotactic Body Radiotherapy (SBRT)
Also known as SABR (Stereotactic Ablative Body Radiotherapy).
- Definition: A highly precise form of radiotherapy that delivers very high doses of radiation to tumors in the body (outside the brain/spine) over a few sessions.
- Technique: Uses advanced image guidance and motion management to accurately target tumors while sparing normal tissues.
- Dose & Fractions: Typically, 3–5 high-dose fractions, occasionally up to 8.
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Sites Treated:
- Lung (early-stage NSCLC)
- Liver (HCC or metastases)
- Adrenal gland
- Spine (non-SRS spine lesions)
- Prostate (in selected cases)
- Pancreas and other oligometastatic sites like lymph nodes etc
Key Features
Feature
Description
Precision
Sub-millimeter accuracy using stereotactic setup
Fractionation
Hypofractionated (fewer sessions, higher dose per fraction)
Motion Management
Motion Management Respiratory gating, abdominal compression, or tracking used
Technology
LINAC (e.g., TrueBeam), CyberKnife, MR-LINAC, etc.
Goal
Curative intent in early cancers or ablative in oligometastasis
Advantages
- Comparable control rates to surgery in some cases (e.g., early lung cancer)
- Non-invasive, outpatient treatment
- Shorter treatment duration