successREF – Audit Service

successREF – Audit Service

successREF - Reference dosimetry audit service

Confidence in radiotherapy starts with confidence in absorbed dose

Modern radiotherapy depends on precision. As treatment technologies become increasingly sophisticated, confidence in beam output calibration remains one of the most fundamental requirements for safe and effective patient care.

successREF is an independent reference dosimetry audit service designed to verify absorbed dose under reference conditions with scientific rigor, operational simplicity and full traceability.

By providing external independent verification of beam calibration for megavoltage photon and electron beams, successREF helps radiotherapy departments strengthen confidence in treatment delivery, support quality management programs and demonstrate commitment to the highest standards of patient safety.

Why successREF?

Even small deviations in absolute dose delivery can influence the entire treatment pathway.

For medical physicists, successREF provides independent confirmation of beam output calibration, helping verify local reference dosimetry procedures and identify potential inconsistencies before they affect patient treatments.

For radiation oncologists and multidisciplinary clinical teams, the service provides reassurance that prescribed doses are delivered accurately and consistently, supporting confidence in treatment quality and clinical outcomes.

For hospital administrators and quality managers, successREF demonstrates commitment to safety, quality and continuous improvement while supporting readiness for accreditation, regulatory requirements and external audits.

This unique solution not only promotes quality but also propels your clinic to the forefront of cutting-edge radiotherapy advancements.

How it works​

Scientific foundation

Scientific foundation successREF is an absolute dosimetry audit service focused on verifying absorbed dose under reference conditions for:

  • Megavoltage photon beams
  • Megavoltage electron beams
  • Conventional C-arm linear accelerators
  • CyberKnife systems
  • Tomotherapy / Radixact platforms


The methodology combines:

  • Calibrated Optically Stimulated Luminescence Dosimeters (OSLDs)
  • Gafchromic EBT4 film dosimeters
  • Water-equivalent phantom geometry


All detectors are calibrated in a Secondary Standard Dosimetry Laboratory with traceability to primary standards, ensuring the highest level of measurement reliability. The methodology incorporates internationally recognized dosimetry recommendations, including:

  • AAPM TG-191 guidance for OSL dosimetry
  • Established protocols for radiochromic film dosimetry and analysis


RTsafe supplies the complete audit package, while the participating department performs the irradiations using standard reference conditions and routine clinical procedures. This combination of scientific robustness and practical implementation allows departments to obtain independent verification with minimal operational burden.

The RTsafe Advantage

successREF is built upon RTsafe’s extensive experience in independent radiotherapy quality assurance and dosimetry verification. The RTsafe team includes medical physicists and researchers with long-standing expertise in:

  • Reference and end-to-end dosimetry audits
  • Stereotactic radiotherapy verification
  • Phantom development
  • Advanced QA methodologies

RTsafe solutions are trusted by radiotherapy departments worldwide and support the safe delivery of advanced radiation treatments through independent verification and evidence-based quality assurance.

successREF reflects RTsafe’s commitment to making high-level external quality assurance more accessible, efficient and clinically meaningful. With successREF, radiotherapy departments gain confidence in one of the most fundamental elements of cancer treatment: delivering the right dose, accurately and consistently, for every patient.

Additional material

Sample REF Report

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