Imaging Detector Thermal Control for CT Scanner Artifacts
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Solution Overview
Problem
Temperature variations in radiation-sensitive pixels of detector arrays in CT scanners lead to ring artifacts in image data, despite stringent temperature control measures which can be costly and imperfect.
Innovation Solution
Integration of a thermal controller within the detector module, using temperature sensors and heaters to regulate the temperature of the radiation-sensitive detector module, ensuring it remains within a predetermined range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If stringent temperature control measures (control loop with temperature sensors and heaters, fans, heat sinks) are employed to maintain detector array within predetermined temperature range, then temperature stability is improved, but system cost increases
Solution Approach 1:
The patent merges the thermal controller with the detector module, integrating temperature sensors and heaters directly into the detector assembly. This consolidation eliminates the need for separate external temperature control systems, reducing overall system complexity and cost while maintaining temperature stability through direct thermal management at the detector level
2Stability of the object's composition
If stringent temperature control measures are employed to maintain detector array within predetermined temperature range, then temperature stability is improved, but imaging performance may still be compromised if control is not adequate
Solution Approach 1:
The patent implements a feedback control mechanism where temperature sensors continuously monitor the detector module temperature, and the thermal controller adjusts heater power accordingly to maintain the temperature within the predetermined range. This closed-loop feedback ensures adequate temperature control that preserves imaging performance by preventing temperature-induced artifacts
3Device complexity
If temperature control is relaxed to reduce cost, then system cost decreases, but temperature variations cause ring artifacts in image data
Solution Approach 1:
The patent segments the temperature control approach by applying thermal management at the detector module level rather than at the entire detector array level. Each module has its own temperature sensors and heaters, allowing localized temperature control that prevents ring artifacts in individual modules while reducing overall system cost through modular, targeted control
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
Effectively mitigates temperature-induced artifacts in image data by maintaining consistent detector module temperatures, enhancing imaging performance while potentially reducing costs associated with temperature control.
Implementation Method 1
temperature sensors and heaters to regulate the temperature
Implementation Method 2
heaters to regulate the temperature
Implementation Method 3
the front-end electronics consume power and produce heat, which transfers to and heats up the detector
Data Source
AI summary
An imaging detector includes a radiation sensitive region having first and second opposing sides. One of the first or second sides senses impinging radiation. The detector further includes electronics located on the other of the first or second sides of the radiation sensitive region. The electronics includes a thermal controller that regulates a temperature of the imaging detector.