Particle Beam Irradiation Apparatus Position Error Visualization
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Solution Overview
Problem
Current particle beam irradiation systems lack a method to intuitively display irradiation position accuracy and errors, making it difficult to maintain and adjust the scanning accuracy over time.
Innovation Solution
A detector and data processing apparatus that displays measured irradiation position relevant values and errors relative to desired values, using deformation coefficients to visualize the correspondence between irradiation positions and errors within the irradiation region, allowing for intuitive understanding and maintenance of irradiation accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If scanning irradiation method is used to improve flexibility and conform to diseased site shape, then adaptability is improved, but irradiation position accuracy deteriorates over time
Solution Approach 1:
The system continuously monitors the actual irradiation position using position monitors and compares it with the desired position. The scanning electromagnet control is adjusted based on this feedback to correct deviations, thereby maintaining irradiation accuracy over time while preserving the flexibility of the scanning method.
2Adaptability or versatility
If scanning electromagnet is used to scan pencil-shaped beam, then adaptability to diseased site shape is improved, but device complexity increases
Solution Approach 1:
A data processing apparatus serves as an intermediary between the position monitors and the scanning electromagnet control. This intermediary processes position data, calculates deviations, and generates correction signals, thereby managing the complexity of the scanning control system while maintaining the ability to conform to diseased site shapes.
3Reliability
If irradiation position accuracy monitoring is implemented, then reliability is improved, but device complexity increases
Solution Approach 1:
The data processing apparatus performs multiple functions: it processes position data from monitors, calculates irradiation position deviations, generates correction signals for the scanning electromagnet, and displays accuracy information. By consolidating these functions into a single multi-functional device, the system improves reliability without proportionally increasing 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
Enables the user to easily grasp and maintain irradiation position accuracy by visually correlating irradiation positions and errors, improving the overall accuracy and maintenance of particle beam therapy systems.
Implementation Method 1
there is utilized an electromagnet, referred to as a scanning electromagnet or a 'so-sa' electromagnet (referred to as a 'scanning electromagnet', hereinafter), that makes a magnetic field change at high speed
Implementation Method 2
a pencil-shaped thin charged particle beam is irradiated while being three-dimensionally scanned
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The objective is to obtain a particle beam irradiation apparatus in which an irradiation position relevant value related to the irradiation position of a charged particle beam and an irradiation position relevant value errorcan be displayed in such a way that the irradiation position relevant value and the irradiation position relevant value error correspond to each other. There is provided a data processing apparatus (19) that displays on a display unit (43) a measured irradiation position relevant value and an irradiation position relevant value error, which is the error of the measured irradiation position relevant value related to the irradiation position of charged particle beam (1) with respect to a desired irradiation position relevant value related to a desired irradiation position, in such a way that the measured irradiation position relevant value and the irradiation position relevant value error correspond to each other; and the data processing apparatus (19) has a calculation unit (42) that displays a desired value display figure (23) indicating a desired irradiation position relevant value at the coordinates of the desired irradiation position relevant value and a measured value display figure (24) at display coordinates, which are coordinates obtained by adding the desired irradiation position relevant value to the coordinates acquired by arithmetically operating an irradiation position relevant value error with deformation coefficients, and that displays a line (25) that connects the measured value display figure (24) with the desired value display figure (23).