A dose texture plot in a moving frame as a new planning tool for single-plane implants in HDR brachytherapy

Area of Science:

• Medical Physics
• Radiation Oncology
• Brachytherapy

Background:

• Accurate visualization of radiation dose distribution is crucial for effective brachytherapy.
• Current methods for evaluating dose distribution can be complex and time-consuming.
• Optimizing source dwell times and positions is essential for maximizing therapeutic efficacy and minimizing side effects.

Purpose of the Study:

• To introduce and evaluate a novel dose-texture plot as a tool for brachytherapy treatment planning and evaluation.
• To demonstrate the utility of dose-texture plots in optimizing radiation delivery.
• To compare the performance of an iteration optimization algorithm using dose-texture plots against commercial planning systems.

Main Methods:

• Development of a dose-texture plot using a super-plane to represent dose values at specific points.
• Utilizing a moving frame with axes defined by catheter position and dwell step-size for integer-based point localization.
• Application of the dose-texture plot in an iteration optimization algorithm for treatment planning.

Main Results:

• Dose-texture plots provide a concise visual representation of dose and location information.
• The developed tool enables quick and quantitative evaluation of source dwell times and positions.
• The iteration optimization algorithm utilizing dose-texture plots demonstrated significant improvements in clinical cases compared to commercial systems.

Conclusions:

• Dose-texture plots are an effective tool for visualizing and evaluating dose distribution in brachytherapy.
• This approach facilitates the development of advanced, iterative optimization algorithms for treatment planning.
• The proposed method offers superior performance compared to existing commercial brachytherapy planning systems.