AAPM task group report 314: Fault recovery in external beam radiation therapy

Area of Science:

• Medical Physics
• Radiation Oncology
• Biomedical Engineering

Background:

• Linear accelerators (linacs) are critical in radiation therapy, delivering photon and electron beams.
• Fault states in linac systems can disrupt treatment delivery, posing risks to patient care.
• Existing guidance for linac fault management and recovery is limited.

Purpose of the Study:

• To develop comprehensive guidance for recovering from fault states in radiation therapy linear accelerators.
• To provide recommendations for proactive measures, actions during a fault, and safe return to clinical service.
• To outline roles for manufacturers and standards organizations in fault prevention and resolution.

Main Methods:

• The report consolidates recommendations from Task Group 314 of the American Association of Physicists in Medicine (AAPM).
• It addresses fault conditions arising from software, hardware, or combined causes.
• Guidance covers pre-fault preparation, immediate fault response, and post-fault safety assessments.

Main Results:

• Proactive steps include maintaining fault logs, enabling remote vendor access, and training staff on emergency controls.
• During a fault, key actions involve ensuring patient safety, capturing fault data, contacting service engineers, and communicating downtime estimates.
• Medical physicists must assess fault impact, determine necessary testing, and ensure treatment data integrity before resuming operation.

Conclusions:

• Effective linac fault recovery requires a collaborative approach involving radiation therapists, medical physicists, and service engineers.
• Implementing the recommended guidelines enhances patient safety and operational efficiency in radiation therapy.
• The report serves as a guideline for institutions, not a regulatory standard, requiring appropriate interpretation for specific clinical settings.