Radiation protection at medical accelerators.

Area of Science:

• Medical Physics
• Radiation Oncology
• Accelerator Science

Background:

• Proton and light ion accelerators are increasingly used in radiotherapy, necessitating robust radiation protection measures.
• The planned National Centre of Hadrontherapy in Italy serves as a case study for implementing these protection strategies.
• Ensuring safety for personnel and the public is paramount in the design and operation of these advanced facilities.

Purpose of the Study:

• To present methodologies for radiation protection at proton and light ion radiotherapy accelerators.
• To discuss shielding design, including treatment room access mazes.
• To analyze air activation and its environmental impact, as well as radioactivity induced in accelerator components.

Main Methods:

• Shielding design calculations for accelerator facilities and access routes.
• Estimation of air activation within accelerator environments.
• Assessment of dose equivalent to the public from airborne radioactivity.
• Evaluation of neutron and photon activation in magnets and patient collimators.

Main Results:

• The paper outlines effective shielding designs and maze configurations for treatment rooms.
• It provides methods for estimating air activation and associated public dose equivalents.
• Results indicate the significance of induced radioactivity in accelerator components like magnets and collimators.

Conclusions:

• Comprehensive radiation protection strategies are essential for the safe operation of hadrontherapy facilities.
• Methodologies presented are applicable to the design of new centers, ensuring compliance with safety regulations.
• Further research into induced radioactivity in accelerator materials is warranted.