Treatment planning considerations for ¹²⁵I eye plaque brachytherapy

Area of Science:

• Oncology
• Medical Physics
• Radiation Therapy

Background:

• Effective cancer brachytherapy necessitates precise radiation delivery to tumors while sparing surrounding healthy tissues.
• Accurate understanding of brachytherapy techniques and their parameters is crucial for developing robust and optimized treatment plans.
• Minimizing radiation exposure to organs at risk is a key challenge in brachytherapy planning.

Purpose of the Study:

• To establish general procedures and strategies for optimizing and customizing brachytherapy plaques loaded with radioactive seeds.
• To define tactics for limiting high radiation doses to organs at risk during brachytherapy.
• To adapt brachytherapy treatment times based on institutional needs and treatment protocols.

Main Methods:

• Review and synthesis of existing brachytherapy planning techniques.
• Development of optimization strategies for radioactive seed plaque loading.
• Identification of methods to assess and mitigate dose to organs at risk.
• Consideration of treatment time adaptation based on clinical requirements.

Main Results:

• General procedures for brachytherapy plaque optimization have been established.
• Specific tactics for dose reduction to organs at risk are outlined.
• Strategies for adapting treatment duration are proposed.
• The importance of accurate source and magnitude knowledge for plan optimization is highlighted.

Conclusions:

• Optimized brachytherapy plans require careful consideration of dose distribution.
• Implementing specific strategies can effectively limit radiation exposure to critical normal tissues.
• Customization of brachytherapy plaques and treatment times enhances treatment efficacy and safety.
• This technical note provides a framework for improving brachytherapy planning and execution.