Radiotherapy Positioning Frame with Reusable Rigid Support
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Solution Overview
Problem
Existing radiotherapy positioning devices face challenges in achieving satisfactory rigidity and mechanical strength while minimizing environmental pollution due to the use of non-degradable plastic frames, which leads to waste accumulation.
Innovation Solution
A positioning device comprising a first frame with high mechanical strength and a second frame made of degradable material, connected via a detachable structure, allowing the first frame to be reusable and the second frame to be degradable, ensuring rigidity and mechanical strength during use and reducing waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the plastic frame is made of degradable material, then environmental pollution is reduced, but rigidity and mechanical strength are insufficient
Solution Approach 1:
The frame is divided into two segments: a first frame made of non-degradable engineering plastic and a second frame made of degradable material. The first frame provides structural support and rigidity, while the second frame contacts the patient's body and is designed to be degradable. This segmentation allows each part to have optimized properties for its specific function, resolving the contradiction between environmental friendliness and mechanical strength.
Solution Approach 2:
Different parts of the frame have different material properties tailored to their specific requirements. The first frame (support structure) uses non-degradable engineering plastic for high strength, while the second frame (contact structure) uses degradable material for environmental compatibility. This local differentiation of material quality allows the system to simultaneously achieve both high mechanical strength and reduced environmental pollution.
2Reliability
If the plastic frame is made of engineering plastic with satisfactory rigidity and mechanical strength, then positioning accuracy is ensured, but environmental pollution increases due to non-degradability
Solution Approach 1:
The frame is segmented into a first frame for structural support and a second frame for patient contact. The first frame is made of engineering plastic to ensure positioning accuracy and rigidity, while the second frame is made of degradable material to reduce environmental pollution. This segmentation allows the system to achieve both high reliability and environmental compatibility.
Solution Approach 2:
The material quality is locally optimized: the first frame uses engineering plastic with high rigidity for accurate positioning, while the second frame uses degradable material that is softer and more comfortable for patient contact. This local quality differentiation resolves the contradiction between positioning accuracy and environmental protection.
3Stability of the object's composition
If the low-temperature thermoplastic film and plastic frame are connected by welding or bonding, then fixation stability is improved, but the entire assembly becomes non-reusable and generates more waste
Solution Approach 1:
The connection between the thermoplastic film and frame is segmented into two stages: a reversible magnetic connection for positioning and a permanent thermal bonding for fixation. This allows the first frame to be reused across multiple patients while the second frame and film are customized and disposed of after single use, reducing overall waste generation while maintaining fixation stability.
Solution Approach 2:
The connection method changes parameters from permanent (welding/bonding) to reversible (magnetic attraction) for the first frame connection, enabling reuse. The thermoplastic film is then thermally bonded to the second frame for stable fixation during the procedure. This parameter change in connection method resolves the contradiction between fixation stability and waste reduction.
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 device maintains positioning accuracy with satisfactory rigidity and mechanical strength, effectively avoiding environmental pollution by allowing the second frame and thermoplastic film to be degradable while the first frame is reusable.
Implementation Method 1
a first connecting structure comprising first connecting portions arranged at the first frame and second connecting portions arranged at the second frame, wherein the first connecting portions are magnetically attracted to the second connecting portions
Data Source
AI summary
A positioning device for radiotherapy, includes a first frame, a degradable low-temperature thermoplastic film and a degradable second frame. The second frame is connected to an outer edge of the low-temperature thermoplastic film, and a softening point of the second frame is higher than a softening point of the low-temperature thermoplastic film. A mechanical strength of the first frame is greater than a mechanical strength of the second frame, and the first frame and the second frame are detachably connected through a first connecting structure. When in use, the positioning device for radiotherapy in the disclosure has satisfactory rigidity and mechanical strength for positioning, and effectively avoids waste and environmental pollution since the second frame and the low-temperature thermoplastic film that are non-reusable are degradable and the non-degradable first frame is reusable.