Shielded Radioactive Material Filling System with Automated Syringe Control
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Solution Overview
Problem
There is a need for safe and efficient systems to handle and dispense small volumes of radioactive materials, minimizing exposure to radioactivity and ensuring accurate dosing, while preventing cross-contamination and managing hazardous waste effectively.
Innovation Solution
The system comprises a shielding material chamber with a conduit for syringe operation, a computer-controlled syringe controller, bar code scanning for dose calculation, a waste container with rotating compartments for decay management, and a ventilation system for ambient air entry, ensuring safe handling and disposal of radioactive materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual handling of radioactive materials is used, then ease of operation is improved, but technician exposure to radioactivity increases
Solution Approach 1:
A robotic manipulator arm with gripper serves as an intermediary between the operator and radioactive materials. The manipulator performs all handling operations including picking up vials, transferring them between stations, and positioning them for dispensing, while the operator remains behind protective shielding controlling the robot remotely
Solution Approach 2:
Manual mechanical operations are replaced with an automated robotic system. The robotic manipulator arm with programmable movements substitutes human hands and arms, eliminating direct human contact with radioactive materials while maintaining precise control over handling operations
2Object-affected harmful factors
If shielding material is used to block radioactivity, then technician exposure is reduced, but device complexity increases
Solution Approach 1:
The robotic manipulator arm performs multiple functions: picking up vials from storage, transferring them to dispensing stations, positioning them for injection, and returning them to storage. This single multi-functional device replaces what would otherwise require multiple separate handling mechanisms and human operations
Solution Approach 2:
The system employs a compact nested structure where the robotic manipulator arm with articulated segments and gripper fits within the shielded chamber environment. The manipulator's components are nested within each other when not in use, maximizing space utilization within the constrained shielded area
3Measurement precision
If automated syringe controller is used for dosing, then dosing accuracy is improved, but device complexity increases
Solution Approach 1:
The syringe controller is a self-contained automated unit that independently performs all dosing operations. It automatically calculates required doses based on programmed parameters, precisely controls syringe plunger movement to deliver exact volumes, and self-regulates the dispensing process without requiring complex external control systems
Solution Approach 2:
The syringe controller acts as an intermediary device between the robotic manipulator and the radioactive solution. It receives positioning commands from the robot, autonomously executes the precise dosing operation, and returns the syringe to the robot for removal, simplifying the overall control architecture
4Reliability
If waste container with rotating compartments is used, then hazardous waste management is improved, but device complexity increases
Solution Approach 1:
The waste container is segmented into multiple separate compartments that can be independently filled and sealed. Each compartment receives waste from a specific dispensing station, allowing waste to be divided into discrete, manageable sections that can be individually monitored, sealed, and removed for decay storage
Solution Approach 2:
The waste container implements periodic action through its rotation mechanism that brings different compartments to the loading position at regular intervals. This allows systematic filling of compartments in sequence, periodic sealing and weighing operations, and organized rotation to designated decay storage positions
5Measurement precision
If bar code scanning is used for dose calculation, then dosing accuracy is improved, but ease of operation deteriorates
Solution Approach 1:
The bar code scanning function performs preliminary action by reading and storing vial identification information before the dispensing operation begins. The system pre-calculates required doses based on the scanned data and programmed parameters, preparing all dosing information in advance to guide the automated syringe controller
Solution Approach 2:
The bar code scanner provides feedback to the control system about the specific vial being processed. This feedback enables the system to automatically retrieve the correct dosing parameters from memory, verify the vial identity against the prescribed medication, and adjust the dispensing calculation accordingly, ensuring accuracy through continuous verification
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 system effectively minimizes technician exposure to radioactivity, ensures accurate dosing, prevents cross-contamination, and manages hazardous waste by using shielding, computer-controlled operations, and efficient waste compartment rotation, thereby enhancing safety and efficiency in handling radioactive materials.
Implementation Method 1
a shielding material that substantially defines a chamber and, preferably, substantially blocks radioactivity
Implementation Method 2
a syringe, a syringe controller that is disposed in the dispensing chamber and adapted to meter an aliquot from a radioactive stock solution and inject the aliquot into the capsule or a vial
Implementation Method 3
a bar code scanner for scanning a bar code that provides information about a radioactive iodine solution
Implementation Method 4
a computer has a memory that calculates the volume of radioactive solution that is needed based on i) the information provided by the bar code, and ii) a required dose input at a specific date
Implementation Method 5
the waste container can pivot around a vertical axis in order to place one compartment vis-à-vis the duct for receiving the waste material
Data Source
AI summary
Provided are systems for filling containers with radioactive and/or other types of potentially hazardous materials. In some aspects, the systems include a shielding material that substantially defines a chamber and, preferably, substantially blocks radioactivity, a conduit extending from outside to into the chamber, and a unit that is disposed in the chamber proximal to the conduit and is adapted to receive a capsule through the conduit. The systems of the present disclosure can further comprise a syringe, a syringe controller that is disposed in the dispensing chamber and adapted to meter an aliquot from a radioactive stock solution and inject the aliquot into the capsule or a vial.