Energy Spectrum Acquisition via Depth Dose Curve Relationships
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Solution Overview
Problem
Current methods for obtaining energy spectra in radiotherapy are inefficient, particularly in the context of Monte Carlo algorithms used for dose distribution calculations, where accurate energy spectra are crucial but computationally intensive.
Innovation Solution
A method and system for obtaining energy spectra by acquiring first and second depth dose curves corresponding to different energies, determining relationships between these curves, and using this relationship to calculate the energy spectrum for the second depth dose curve based on the first energy spectrum and the determined relationship.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If Monte Carlo algorithm is used to obtain energy spectrum for accurate dose distribution calculation, then calculation accuracy is improved, but computational time and complexity increase
Solution Approach 1:
The patent pre-calculates depth dose curves for multiple energies and establishes the relationship between them in advance. When actual dose distribution calculation is needed, the pre-established relationship is used to quickly determine energy spectrum without performing full Monte Carlo simulation, thus reducing computational time while maintaining accuracy
Solution Approach 2:
The patent uses depth dose curves as simplified representations (copies) of the complex particle interaction processes. By working with these curve representations and their relationships rather than full Monte Carlo simulations, the method achieves accurate results with significantly reduced computational effort
2Measurement precision
If full Monte Carlo simulation is performed to obtain energy spectrum, then spectrum accuracy is improved, but computational complexity increases
Solution Approach 1:
The patent extracts the essential relationship information from complex Monte Carlo simulations by pre-calculating depth dose curves and their relationships. This extracted relationship is then used to determine energy spectra without requiring full Monte Carlo simulations for each case, thereby reducing computational complexity while preserving accuracy
Solution Approach 2:
The patent changes the approach from direct Monte Carlo simulation of particle interactions to using pre-established parameter relationships between depth dose curves. This parameter-based method simplifies the computational process while maintaining the accuracy needed for dose distribution calculations
Data Source
AI summary
Provided are a method, a system, and a storage medium for obtaining an energy spectrum. The method comprises: obtaining a first depth dose curve corresponding to a first energy and a second depth dose curve corresponding to a second energy; obtaining, based on the first depth dose curve and the second depth dose curve, a first set of dose values and a second set of dose values along a depth direction, respectively; determining a relationship between the first depth dose curve and the second depth dose curve based on the first set of dose values and the second set of dose values; obtaining a first energy spectrum corresponding to the first depth dose curve; and determining a second energy spectrum corresponding to the second depth dose curve based on the first energy spectrum and the relationship between the first depth dose curve and the second depth dose curve.