Technical Considerations on Proton Therapy in NRG's Multi-Institutional Clinical Trials.

Area of Science:

• Medical Physics
• Radiation Oncology
• Clinical Trials

Background:

• Proton therapy integration into clinical trials is growing.
• Evolving technology and unique properties present challenges in protocol design and data interpretation.
• Standardized approaches are needed for multi-institutional proton therapy trials.

Purpose of the Study:

• To outline key technical considerations for implementing proton therapy in multi-institutional clinical trials.
• To provide guidance for harmonized trial conduct and reliable data collection.
• To address challenges in protocol design, treatment consistency, and outcome assessment for proton therapy research.

Main Methods:

• Review of NRG Oncology protocols involving proton therapy.
• Examination of technical challenges: setup/range uncertainties, motion effects, anatomical changes, RBE variability, plan evaluation.
• Development of recommendations based on clinical practice and multi-institutional trial experience.

Main Results:

• Variability in treatment consistency and outcome interpretation identified in multi-institutional proton therapy trials.
• Inconsistencies found in proton therapy stratification, randomization, technical requirements, and reporting practices.
• Recommendations provided to enhance protocol clarity, robustness assessment, and standardize data collection for cross-institutional comparison.

Conclusions:

• Clear technical guidance is essential for data quality and outcome interpretability as proton therapy use expands in cooperative group trials.
• A technical framework is provided to harmonize proton therapy implementation in multi-institutional trials.
• Considerations for emerging proton therapy technologies are discussed to support future research.