Radiation-Hardened IC for Sterilization Dose Verification
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Solution Overview
Problem
Current methods for sterilizing medical devices using radiation often result in over-irradiation, which is costly and time-consuming, and existing memory technologies cannot store radiation exposure data due to high radiation levels.
Innovation Solution
An integrated circuit with a sensing module, measuring module, comparing module, and memory that senses and measures radiation, compares it to a predetermined threshold, and outputs an indication to determine proper sterilization, capable of storing data in one-time programmable memory that withstands high radiation levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manufacturers over-irradiate instruments to ensure proper sterilization, then sterilization reliability is improved, but cost and time consumption increase
Solution Approach 1:
The patent implements feedback by placing radiation sensors on pallets that continuously monitor radiation exposure during sterilization. The sensor data is transmitted to a central controller that can adjust the irradiation process in real-time, stopping when the minimum required dose is achieved. This eliminates the need for over-irradiation while ensuring sterilization reliability.
Solution Approach 2:
The patent replaces traditional mechanical/timed sterilization control with electronic radiation sensing and digital control systems. Radiation detectors measure actual exposure levels, and digital controllers process this information to precisely control the sterilization process, substituting empirical time-based methods with measurement-based control.
2Reliability
If manufacturers over-irradiate instruments to ensure proper sterilization, then sterilization reliability is improved, but cost increases
Solution Approach 1:
The radiation sensing systems provide real-time feedback on exposure levels, allowing the sterilization process to stop precisely when the minimum effective dose is reached. This prevents wasteful continuation of irradiation beyond what is necessary, reducing energy consumption while maintaining sterilization reliability.
Solution Approach 2:
The system uses self-measuring radiation sensors that automatically monitor and report exposure levels without external intervention. The sensors on each pallet independently track their own radiation receipt, enabling autonomous control decisions that optimize energy usage.
3Loss of information
If traditional memory technologies are used to store radiation data, then data storage capability is provided, but the memory is erased by high radiation levels
Solution Approach 1:
The patent introduces radiation-hardened memory technologies as intermediaries between the radiation environment and data storage requirements. These specialized memory devices can withstand high radiation levels that would erase conventional memory, allowing accurate recording and retention of sterilization data throughout the process.
Solution Approach 2:
The system changes the physical parameters of the memory medium by using materials and structures specifically designed to resist radiation effects. Radiation-hardened memory employs different semiconductor structures, shielding, and error correction mechanisms that maintain data integrity in high-radiation environments.
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
Optimizes irradiation procedures by determining if medical devices have received the minimum required radiation, reducing costs and time, and allowing for accurate logging and verification of sterilization status.
Implementation Method 1
The sensing module senses radiation incident on the integrated circuit
Implementation Method 2
The measuring module measures the amount of the radiation based on an amount of shift in the threshold voltage of the MOSFET due to the radiation
Implementation Method 3
The comparing module communicates with the measuring module and compares the amount of the radiation to a predetermined threshold and generates an indication
Data Source
AI summary
An integrated circuit includes a sensing module, a measuring module, a comparing module, and memory. The sensing module senses radiation incident on the integrated circuit. The measuring module communicates with the sensing module and measures an amount of the radiation incident on the integrated circuit. The comparing module communicates with the measuring module and compares the amount of the radiation to a predetermined threshold and generates an indication that the amount of the radiation is less than the predetermined threshold or that the amount of the radiation is greater than or equal to the predetermined threshold. The memory stores the indication.