Particle Beam Therapy Controller Verification
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Solution Overview
Problem
Current particle beam therapy systems face challenges in reliably verifying irradiation techniques after switching between raster scanning and discrete spot scanning methods, leading to potential inconsistencies in treatment delivery.
Innovation Solution
A particle beam therapy system that includes an accelerator, an irradiator, and a controller capable of switching between irradiation techniques and performing tentative irradiation to verify the correct switching of control parameters, ensuring accurate irradiation based on selected techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If switching between raster scanning and discrete spot scanning techniques is implemented, then versatility of the particle beam therapy system is improved, but reliability of irradiation verification deteriorates
Solution Approach 1:
The system performs tentative irradiation as a preliminary verification step before actual treatment irradiation. The controller executes a verification process that includes performing tentative irradiation with the particle beam after switching irradiation techniques, and compares the actual irradiation parameters with the planned parameters to confirm correct switching before proceeding with full treatment.
Solution Approach 2:
The verification process establishes a feedback loop where the controller monitors irradiation parameters during tentative irradiation, compares them with the control parameter sets, and confirms whether the switching between raster scanning and discrete spot scanning techniques has been correctly executed before allowing actual treatment to proceed.
2Manufacturing precision
If separate control parameter sets are used for different irradiation techniques, then precision of irradiation control is improved, but complexity of system control increases
Solution Approach 1:
The control parameter sets are segmented into technique-specific groups (raster scanning control parameters and discrete spot scanning control parameters). The controller is configured to select and switch between these segmented control parameter sets based on the chosen irradiation technique, allowing precise control for each technique while systematically managing the complexity through organized parameter grouping.
Data Source
AI summary
The present invention makes it possible to reliably verify irradiation with a particle beam in accordance with a selected irradiation technique. A particle beam therapy system includes a charged particle beam generator accelerating the particle beam, an irradiator irradiating a target with the particle beam accelerated by the charged particle beam generator, and a controller controlling the charged particle beam generator and the irradiator. The controller controls the charged particle beam generator and the irradiator so as to irradiate the target with the particle beam through switching between at least two different irradiation techniques, and furthermore, after switching between the two irradiation techniques, controls the charged particle beam generator and the irradiator to perform tentative irradiation with the charged particle beam in accordance with one of the irradiation techniques switched, to verify the particle beam.