Collimator Model Verification for Radiation Treatment Positioning
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Solution Overview
Problem
Existing radiation therapy systems face challenges in verifying irradiation parameters due to the limitations of collimator size, which cannot be transported into image acquisition devices for radiography, necessitating reduced requirements for the working range of these devices.
Innovation Solution
A radiation ray therapy system utilizing a collimator model with a collimator model outlet identical in shape and size to the collimator outlet but smaller in length, allowing transport into image acquisition units for verification, accompanied by an irradiation parameter verification device comprising an image acquisition unit, storage, conversion, calculation, and comparison units to determine suitable patient positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the collimator is transported into the image acquisition device for radiography, then accurate verification of irradiation parameters is achieved, but the working range requirements of the image acquisition device increase
Solution Approach 1:
The patent creates a collimator model that replicates the critical geometric features of the actual collimator (outlet shape, size, and position) but reduces its length to fit within the image acquisition device's working range. This copy allows accurate irradiation parameter verification without requiring the full-size collimator to be transported into the imaging device.
Solution Approach 2:
The patent extracts only the essential features of the collimator (the outlet geometry and its spatial relationship to the radiation source) needed for irradiation parameter verification, creating a simplified model that retains measurement accuracy while reducing overall dimensions to accommodate the image acquisition device's constraints.
2Loss of information
If the full-size collimator is used for imaging, then complete geometric information is captured, but the image acquisition device requires larger working range and higher manufacturing cost
Solution Approach 1:
The patent applies local quality by concentrating the collimator model's resources on accurately representing the outlet region (where the radiation beam exits and geometry is critical) while minimizing or simplifying other portions of the collimator structure. This ensures complete geometric information at the critical measurement location without requiring the entire collimator to be imaged.
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
Reduces the need for large working ranges in image acquisition devices, enabling accurate verification of irradiation parameters and reducing manufacturing costs by allowing collimator models to be transported with patients for imaging, thus ensuring precise tumor targeting and minimizing normal tissue damage.
Implementation Method 1
the image acquisition unit may include a CT scanner
Data Source
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AI summary
A radiation treatment system and an operation procedure of an irradiation parameter verification device. The radiation treatment system comprises a radiation generation device, an irradiation chamber used for placing a patient, a carrying device used for transferring and bearing the patient, a collimator provided in the irradiation chamber, an irradiation parameter verification device used for determining whether the position of the patient is suitable for performing radiation irradiation treatment or not, and a collimator model, wherein the collimator comprises a collimator outlet; the collimator model comprises a collimator model outlet; the shape and the size of the collimator model outlet are the same as those of the collimator outlet, and the size of the collimator model in the direction perpendicular to the collimator model outlet is smaller than the size of the collimator in the direction perpendicular to the collimator outlet.