Radiation Treatment Plan Optimization for Overlapping Field Paths

The patent applies local quality by differentiating radiation dosing based on location - delivering full therapeutic dose to target volumes while reducing dose in healthy tissues. The system calculates intersection volumes of field paths and applies dose reduction factors specifically in regions where multiple fields overlap within healthy tissue, thereby protecting local healthy areas while maintaining therapeutic effectiveness in target areas.

The patent changes the radiation dose parameter dynamically based on field path intersections. By calculating the number of overlapping fields in each region and applying corresponding dose reduction factors, the system modifies the radiation dose parameter locally - delivering higher doses to targets and reduced doses to healthy tissues in overlap regions, thus resolving the contradiction between therapeutic effect and healthy tissue protection.

The patent segments the optimization process into distinct steps: first calculating field path intersections, then determining intersection volumes,接着 applying dose reduction factors, and finally generating the treatment plan. This segmentation breaks down the complex optimization into manageable modules, improving computational efficiency while maintaining treatment effectiveness.

The patent performs preliminary calculations of field path intersections and intersection volumes before final dose optimization. By pre-calculating the geometric relationships and overlap regions, the system prepares data structures that facilitate faster subsequent optimization iterations, reducing overall computational complexity and time.