Lightweight Shielding Assembly for Infusion Systems
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Solution Overview
Problem
Conventional shielding assemblies for radiopharmaceutical infusion systems are bulky and heavy, posing difficulties for personnel who regularly set up, maintain, and use these systems, leading to increased radiation exposure.
Innovation Solution
The development of a shielding assembly with a lightweight, ergonomic design featuring injection-molded polyurethane panels and a framework that includes a computer-controlled infusion system with a touch screen interface for safe operation and maintenance, along with a shielding assembly composed of 3% antimony lead or other shielding materials to minimize radiation exposure for technical personnel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional lead shielding assemblies are used, then radiation protection is effective, but the weight and bulk increase significantly
Solution Approach 1:
The patent employs composite shielding structures combining lead with lighter materials such as polyurethane foam and acrylic. The lead provides radiation attenuation while the lighter materials reduce overall density and improve ergonomics. This composite approach maintains radiation protection effectiveness while significantly reducing the weight burden on personnel.
Solution Approach 2:
The invention modifies the physical parameters of shielding materials by using lead alloys with antimony (3% antimony lead) to optimize both protective properties and weight characteristics. Additionally, the shielding assembly incorporates varying thicknesses of lead in different regions based on radiation exposure requirements, optimizing the weight-protection balance.
2Object-affected harmful factors
If conventional lead shielding assemblies are used, then radiation protection is effective, but the bulk and volume increase
Solution Approach 1:
The shielding assembly is designed with nested structures where the lead shielding layers are integrated within a compact framework. The polyurethane foam core provides structural support while accommodating the lead shielding layers, creating a space-efficient nested configuration that reduces overall volume while maintaining protective coverage.
Solution Approach 2:
The shielding assembly implements local quality by varying the lead shielding thickness and material distribution according to the specific radiation exposure risks at different locations. This allows for reduced material volume in areas requiring less protection while maintaining adequate shielding where radiation exposure is higher, optimizing the volume-protection trade-off.
3Object-affected harmful factors
If heavy shielding components are used, then radiation protection is effective, but ease of operation deteriorates
Solution Approach 1:
The shielding assembly is divided into segmented, modular components that can be easily assembled, disassembled, and repositioned. The framework structure allows for modular lead shielding panels and adjustable components, enabling personnel to set up and maintain the system without moving excessively heavy monolithic structures, thereby improving ease of operation while maintaining radiation protection.
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 solution provides a safer and more ergonomic working environment by reducing the weight and bulk of shielding components while ensuring effective radiation protection through a computer-facilitated operation that minimizes exposure to radiation during maintenance and infusion procedures.
Implementation Method 1
shielding assemblies, which provide a radiation barrier to protect these personnel from excessive exposure to radiation sources
Data Source
AI summary
A shielding assembly for an infusion system includes a plurality of compartments and a door for each compartment, and provides a radioactive radiation barrier for the compartments. One of the compartments contains a radioisotope generator of the infusion system and another of the compartments may contain a waste bottle of the infusion system. An opening into each of the generator and waste bottle compartments may be oriented upward, and the opening into the latter may be at a higher elevation than the opening into the former, for example, to facilitate independent removal and replacement of each. A door of at least one of the compartments, other than the generator compartment, when closed, may prevent the door of the generator compartment from being opened. A cabinet structure for the infusion system may enclose the shielding assembly and secure the generator.