Electron Beam Entry Angle Control for Radiation Therapy
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Solution Overview
Problem
The challenge in radiation therapy is to accurately and efficiently deliver therapeutic doses of radiation while minimizing damage to healthy tissue, particularly due to the diverging paths of electron beams which complicate uniform dose delivery and require careful management of electron beam energy levels to avoid excessive radiation to critical structures.
Innovation Solution
The proposed solution involves a radiation system that includes an electron gun, a bend magnet, a scan control component, and an electron beam entry angle control component. This system generates and accelerates electrons, bends their paths, controls their movement in a scan pattern, and adjusts the entry angle of the electron beam to optimize penetration characteristics, allowing for precise and uniform dose delivery to tissue targets while minimizing exposure to healthy tissues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If electron beam energy levels are kept low to prevent excessive radiation doses to organs at risk, then radiation safety is improved, but dose delivery to deep tissue targets becomes insufficient
Solution Approach 1:
The treatment is divided into multiple segments or passes, with the electron beam delivered from different angles and energies. Each segment targets specific portions of the tumor at different depths, allowing low-energy beams to contribute to the overall dose distribution without any single beam penetrating too deeply and damaging organs at risk.
Solution Approach 2:
Different electron beam energies are applied to different regions of the treatment field. The system optimizes the energy distribution locally, matching the beam energy to the specific depth and geometry of the tumor in each region, thereby delivering adequate dose to deep targets while keeping exposure to critical structures below safety thresholds.
2Length of moving object
If electron beam energy levels are increased to reach deep tissue targets, then penetration capability is improved, but radiation dose to skin and superficial tissues becomes excessive
Solution Approach 1:
The deep tumor target is treated through multiple segmented beams of moderate energy rather than a single high-energy beam. This segmentation allows the cumulative dose to reach deep targets while each individual beam maintains energy levels that limit skin dose.
Solution Approach 2:
The system transitions from thinking in terms of single-beam energy to multi-dimensional dose construction, where beams from multiple angles and energies are combined. This dimensional approach allows deep penetration through geometric arrangement rather than relying solely on high beam energy.
3Ease of operation
If conventional radiation delivery methods are used, then treatment simplicity is maintained, but dose uniformity across the tumor target deteriorates due to diverging electron paths
Solution Approach 1:
The system dynamically adjusts beam parameters including energy, angle, and intensity for each beam segment. This dynamic control compensates for the natural divergence of electron paths, maintaining dose uniformity across the tumor target while preserving operational simplicity through automated control.
Solution Approach 2:
Multiple beam parameters (energy, angle, intensity) are varied and optimized to achieve uniform dose distribution. By changing these parameters across different beam segments, the system compensates for path divergence and achieves superior dose conformity without significantly increasing operational complexity.
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
The system enables efficient and effective radiation planning and treatment by allowing for flexible changes in dose distribution, achieving superior conformity to tissue targets, and delivering more precise dose plans than traditional approaches, thereby reducing side effects on healthy tissues.
Implementation Method 1
The linear accelerator is configured to accelerate the electrons in an electron beam
Implementation Method 2
The bend magnet is configured to bend the path of the electron beam
Implementation Method 3
The electron beam entry angle control component can include electro-magnets configured to create a magnetic field that changes divergent paths of the electrons in the electron beam to substantially parallel paths
Data Source
AI summary
Presented systems and methods enable efficient and effective radiation planning and treatment, including accurate and convenient transmission of the radiation towards a tissue target. In one embodiment, a radiation system includes an electron gun, a bend magnet, a scan control component, and an electron beam entry angle control component. The electron gun is configured to generate electrons. The linear accelerator is configured to accelerate the electrons in an electron beam. The bend magnet is configured to bend the path of the electron beam. The scan control component controls movement of the electron beam in a scan pattern. The electron beam entry angle control component is configured to control the entry angle of the electron beam.