Particle Beam Transport Modeling for Accurate Radiotherapy Dose Calculation
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Solution Overview
Problem
The existing radiotherapy systems face challenges in accurately modeling particle beams due to their wide energy range and complex treatment head components, leading to low modeling efficiency and limited accuracy, which complicates dose calculation for tumor treatment.
Innovation Solution
A method and device for simulating particle transport by obtaining a virtual particle source, modeling range modulators, beam limiting holes, and exit windows based on physical properties, and simulating the deflection of particles through these components under a magnetic field to create detailed models for improved dose calculation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a virtual particle source is used to simulate particle beam transport, then the accuracy of dose calculation is improved, but the complexity of the simulation model increases
Solution Approach 1:
The treatment head is divided into multiple independent components (range modulator, beam limiting hole, exit window), each modeled separately with its own physical properties. This segmentation allows the complex system to be managed through modular models while maintaining overall simulation accuracy for dose calculation.
Solution Approach 2:
A virtual particle source is created that replicates the physical particle source characteristics. This virtual source includes replicated physical properties such as energy distribution, spatial distribution, and angular distribution, enabling accurate simulation without requiring complex physical modeling of the actual source.
2Measurement precision
If detailed physical properties of treatment head components are modeled, then the accuracy of particle beam simulation is improved, but the modeling efficiency decreases
Solution Approach 1:
Instead of modeling every geometric detail of the treatment head components, the invention uses key physical parameters (density, atomic number, thickness) to characterize each component. This parameter-based approach maintains simulation accuracy while significantly improving modeling efficiency by reducing the complexity of geometric modeling.
3Measurement precision
If the particle source is modeled with wide energy range and multiple energy levels, then the accuracy of radiotherapy dose calculation is improved, but the modeling efficiency becomes insufficient for clinical requirements
Solution Approach 1:
The virtual particle source is configured to dynamically generate particles with a wide energy range and multiple energy levels according to clinical requirements. This dynamic capability allows the simulation to adapt to different treatment scenarios without requiring separate models for each energy level, thereby maintaining both accuracy and efficiency.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances the accuracy and efficiency of modeling particle beams, allowing for precise dose calculation and tumor treatment planning, thereby improving the effectiveness of radiotherapy systems.
Implementation Method 1
simulating a deflection of the virtual particle source under a magnetic field to obtain a deflected particle
Data Source
AI summary
The present disclosure relates to a particle transport simulation method which includes obtaining a virtual particle source, simulating a deflection of the virtual particle source under a magnetic field to obtain a deflected particle, modeling one or more of a range modulator, a beam limiting hole, and an exit window based on physical properties of the range modulator, the beam limiting hole and the exit window, respectively, to obtain one or more of a range modulator model, a beam limiting hole model, and an exit window model, and simulating physical processes of the deflected particle in the one or more of the range modulator model, the beam limiting hole model, and the exit window model, respectively.