Radiation Detector Sensitivity Management via Dose Accumulation
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Solution Overview
Problem
Existing radiation image capturing systems fail to manage the sensitivity of radiation conversion panels effectively, leading to inconsistent or inappropriate radiation images due to variable sensitivity, which can result in suboptimal image quality.
Innovation Solution
A radiation image capturing system that includes a radiation detecting cassette with a radiation detector using an array of thin-film transistors and a photoelectric conversion layer made of amorphous selenium, which converts radiation into electric signals, and a console that calculates and manages the accumulated exposed radiation dose to detect changes in sensitivity and issue warnings or schedule replacements, ensuring optimal image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a radiation conversion panel is used to capture radiation images, then radiation images can be captured and displayed immediately, but the sensitivity of the radiation conversion panel changes when irradiated with radiation, leading to variable image quality
Solution Approach 1:
The system continuously monitors the sensitivity of the radiation conversion panel by detecting changes in signal characteristics and feeds this information back to the control unit. The control unit then adjusts imaging parameters or alerts the user when sensitivity changes affect image quality, ensuring consistent image quality despite radiation-induced sensitivity variations.
Solution Approach 2:
The system performs preliminary detection of sensitivity changes in the radiation conversion panel before they significantly impact image quality. By monitoring accumulated radiation dose and detecting sensitivity drift early, the system can alert users to replace or service the panel proactively, preventing degradation of image quality.
2Productivity
If the radiation conversion panel is used continuously, then productivity is maintained, but the accumulated exposed radiation dose increases, causing sensitivity changes and potential panel failure
Solution Approach 1:
The system tracks the accumulated exposed radiation dose of the radiation conversion panel and detects sensitivity changes before they lead to panel failure. By performing preliminary detection and alerting users to replace or service the panel, the system maintains continuous productivity while preventing performance degradation.
Solution Approach 2:
The system provides continuous feedback on the accumulated radiation dose and panel sensitivity status. This feedback mechanism allows the system to monitor panel health in real-time and alert users when maintenance or replacement is needed, ensuring reliable operation throughout continuous use.
3Device complexity
If no sensitivity management is implemented, then device complexity is reduced, but inappropriate radiation images may be produced due to variable sensitivity
Solution Approach 1:
The system performs self-diagnosis by automatically detecting sensitivity changes in the radiation conversion panel without requiring external intervention. The control unit monitors signal characteristics and accumulated dose, identifying when sensitivity has changed and alerting the user, thereby maintaining image quality control with minimal added complexity.
Solution Approach 2:
The system incorporates feedback mechanisms that automatically monitor panel sensitivity and provide alerts when changes occur. This feedback approach maintains image quality control by keeping users informed of panel status changes, adding only necessary complexity to ensure reliable operation.
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 manages the sensitivity of radiation conversion panels, preventing suboptimal image capture by detecting sensitivity changes and prompting timely replacements, thereby ensuring consistent and appropriate radiation image production.
Implementation Method 1
a radiation detector using an array of thin-film transistors and a photoelectric conversion layer made of amorphous selenium, which converts radiation into electric signals
Data Source
AI summary
The present invention relates to a radiation image capturing system. A radiation detector of a radiation detecting cassette detects a radiation that has passed through a patient, and an accumulated exposed radiation dose calculator calculates an accumulated exposed radiation dose by accumulating radiation image information detected by the radiation detector, at every image capturing. The calculated accumulated exposed radiation dose is transmitted, together with cassette ID information, to a console. In the console, a status determining unit compares the accumulated exposed radiation dose with an allowable accumulated exposed radiation dose for the radiation detecting cassette to determine the status of the radiation detecting cassette, and issues a warning based on the determined status.