ESTRO 2024 - Abstract Book

S4925

Physics - Quality assurance and auditing

ESTRO 2024

Conclusion:

1. Log file-based PSQA is on average (i.e. across all workflow steps) less risky and more efficient than measurement-based PSQA, requires less equipment, and enables the testing of treatment fields in the same conditions as the patient treatment. Furthermore, using log files can support adaptive proton therapy and facilitate assessment of treatment quality immediately after delivery. 2. Measurement-based PSQA also provides value and risk reduction. Log file- and measurement-based PSQA do not mitigate all of the same risks, and for a given risk, one may be more beneficial than the other. 3. A fully independent secondary dose calculation is required if a center is to move away from measurement based PSQA. It is strongly encouraged that either the primary or secondary calculation is an accurate Monte Carlo dose calculation. 4. Quality assurance of the log data and all data transfer is required for safe use of log file-based PSQA. 5. As part of good practice, if a new technique or treatment site is introduced to the clinic, proper commissioning including phantom-based measurements is necessary.

Keywords: PSQA, Risk, Quality

References:

1. Flanz J, Jakel O, Ford E, Hahn S. PTCOG Safety Group Report on Aspects of Safety in Particle Therapy, Version 2. Particle Therapy Co-Operative Group;2016.