The liver moves
10–25 mm
every breath.
Liver SBRT delivers ablative doses — 45–60 Gy in 3–5 fractions — to tumours that sit millimetres from the bowel, portal vessels and biliary system. The planning geometry must be correct not just at simulation, but during every second of beam-on time across all fractions.
Soft-tissue CBCT matching in the liver introduces a mean positioning error of 5.3 mm. Fiducial-based registration reduces this to 1.5 mm — a 3.5-fold reduction published in a prospective SBRT series.
View Published Evidence ↓Positioning Error — Liver SBRT
Source: Moskalenko et al., Current Oncology (2023). Prospective liver SBRT series.
Reduction in geometric uncertainty when Gold Anchor fiducials replace CBCT soft-tissue matching for liver SBRT delivery.
Real-time Tracking
SyncTraX + Gold Anchor — gated liver SBRT
SyncTraX is a real-time tumour-tracking radiotherapy system that uses X-ray fluoroscopy to track implanted fiducial markers during beam delivery. For liver SBRT, Gold Anchor markers provide the reliable, migration-free reference point that this system requires.
A 2023 publication in the Journal of Radiation Research validated real-time gated liver SBRT with SyncTraX in patients where isocenter shifts were required — a technically demanding scenario that requires complete marker stability throughout the tracking session.
Abdominal Organ Implantation
Dr. Fausto Labruto · Ultrasound-guided Gold Anchor placement in abdominal tumours
Published Research
Liver SBRT — Clinical Publications
mean positioning error with fiducials vs 5.3 mm without — a 3.5× reduction in geometric uncertainty
Fiducial Markers Allow Accurate and Reproducible Delivery of Liver Stereotactic Body Radiation Therapy
Current Oncology · 2023
Gated liver SBRT with Gold Anchor markers — isocenter shift capability validated for moving targets
Real-time tumour-tracking radiotherapy with SyncTraX for primary liver tumours requiring isocenter shift
Journal of Radiation Research · 2023
Comparative study of three marker types/needle sizes for liver CyberKnife SBRT — procedure safety and feasibility
Percutaneous Ultrasound-Guided Fiducial Marker Placement for Liver Cancer Robotic Stereotactic Radiosurgery: Comparative Analysis
Arab Journal of Gastroenterology · 2017
Start your liver SBRT fiducial programme
Saxsons Group supplies Gold Anchor markers across India with in-service training for liver and abdominal implantation techniques.
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Other Radiation Oncology posts and pages in the Gold Anchor family.
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