Radiation Therapy Beam Spot Tuning with Integrated Imaging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for measuring beam spot properties in radiation therapy systems are time-consuming, rely on external equipment, and provide incomplete information, making it difficult to achieve high geometric accuracy for treatments involving small target volumes and high radiation doses.
Innovation Solution
A computer-implemented procedure using an existing imaging panel of the radiation therapy system to directly measure beam spot size, shape, and intensity distribution, reconstructing a 2D image, and modifying these attributes to meet predetermined quality metrics, ensuring accurate beam tuning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If external equipment and time-consuming methods are used to measure beam spot properties, then measurement completeness and accuracy can be improved, but measurement time and system complexity increase
Solution Approach 1:
The radiation therapy system uses its own existing imaging panel to measure beam spot properties, eliminating the need for external measurement equipment. The system performs self-diagnosis by capturing images of the beam spot during normal operation and processing these images to extract size, shape, and position information, thereby reducing measurement time and system complexity while maintaining measurement accuracy
Solution Approach 2:
The existing imaging panel, originally designed for other purposes, is utilized for beam spot property measurement as well. This multi-functional use of the imaging panel eliminates the need for dedicated external measurement equipment, reducing system complexity and measurement time while providing comprehensive beam spot characterization
2Measurement precision
If external measurement equipment is used to measure beam spot properties, then measurement capability can be improved, but device complexity and cost increase
Solution Approach 1:
The radiation therapy system uses its own existing imaging panel to measure beam spot properties, eliminating the need for external measurement equipment. The system performs self-diagnosis by capturing images of the beam spot during normal operation and processing these images to extract size, shape, and position information, thereby reducing measurement time and system complexity while maintaining measurement accuracy
Solution Approach 2:
The existing imaging panel, originally designed for other purposes, is utilized for beam spot property measurement as well. This multi-functional use of the imaging panel eliminates the need for dedicated external measurement equipment, reducing system complexity and measurement time while providing comprehensive beam spot characterization
3Manufacturing precision
If beam spot attributes are not precisely controlled, then system operation simplicity can be maintained, but geometric accuracy and treatment precision deteriorate
Solution Approach 1:
The system captures images of the beam spot using the imaging panel and processes these images to extract size, shape, and position information. This measured information is fed back to automatically adjust beam generation parameters, creating a closed-loop control system that achieves precise beam spot characterization and control while simplifying the operation through automation
Solution Approach 2:
The system performs beam spot measurement and parameter optimization as a preliminary step before actual treatment delivery. By pre-characterizing the beam spot properties and adjusting parameters in advance, the system ensures geometric accuracy is achieved before treatment begins, simplifying the main treatment operation while maintaining high precision
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
Enables precise control of beam spot characteristics, improving geometric accuracy and consistency with treatment planning models, thereby ensuring reliable target power levels and extended system life.
Implementation Method 1
a direct measurement of beam spot size, shape, and intensity distribution in a radiation therapy system using an existing imaging panel of the radiation therapy system
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An example computer-implemented method for tuning a beam spot in a radiation therapy system has been disclosed. The example method includes configuring an electron beam to generate a first beam spot 302 on an electron-beam target 303 of the radiation therapy system, generating, using an imager 105 of the radiation therapy system, a first plurality of projection images of the first beam spot, wherein each of the projection images of the first beam spot is generated with a line of sight blocked between the imager and a different respective portion of the beam spot, based on the first plurality of projection images, determining a value for one or more beam spot quality metrics associated with the first beam spot, and based on the value, determining whether the first beam spot is outside a specified quality range. [Fig. 5]