QA for helical tomotherapy: report of the AAPM Task Group 148

Area of Science:

• Medical Physics
• Radiation Oncology
• Radiotherapy Technology

Background:

• Helical tomotherapy is an advanced radiation therapy modality integrating treatment planning and delivery.
• Its unique hardware design necessitates specialized quality assurance (QA) protocols.
• The American Association of Physicists in Medicine's Therapy Physics Committee established Task Group 148 to address these QA needs.

Purpose of the Study:

• To review helical tomotherapy technology and its QA implications.
• To recommend methodologies for routine quality assurance.
• To provide guidance on applicable dosimetric verification techniques.

Main Methods:

• A comprehensive review of helical tomotherapy hardware and its QA requirements.
• Discussion of quality assurance techniques, including frequencies and tolerances.
• Identification and description of dosimetric verification methods specific to helical tomotherapy.

Main Results:

• The report summarizes findings from Task Group 148, offering insights into helical tomotherapy technology.
• It proposes a framework for establishing an independent and comprehensive QA program.
• Example tests and the rationale behind proposed QA procedures are detailed.

Conclusions:

• Clinical medical physicists can utilize this report to implement effective QA for helical tomotherapy.
• The recommendations aim to ensure the safe and accurate delivery of radiation therapy.
• Future QA test procedures will likely evolve with advancements in helical tomotherapy technology.