Detector IC Temperature Compensation Using Power Dissipation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Advanced CT and PET scanner systems face challenges in accurately measuring temperature variations at detectors due to the lack of integrated temperature-measuring devices, leading to performance limitations and inefficient temperature regulation, which affects signal quality and operational efficiency.
Innovation Solution
An integrated circuit (IC) is electrically and thermally coupled to the detector, incorporating an analog front end, low-pass filter, and circuits to monitor power dissipation, enabling indirect temperature compensation by predicting and proactively adjusting heat dissipation to maintain stable detector temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If dedicated temperature sensors are attached in proximity to detectors, then temperature measurement capability is provided, but measurement precision is insufficient and device complexity increases
Solution Approach 1:
The detector assembly performs self-measurement of temperature-related parameters through its own power consumption characteristics. The system uses the detector's intrinsic electrical properties (power dissipation) as a proxy for temperature measurement, eliminating the need for external temperature sensors and achieving precise temperature monitoring through self-service measurement.
Solution Approach 2:
Power dissipation measurements serve as an intermediary parameter that correlates with detector temperature. Instead of directly measuring temperature with external sensors, the system measures power consumption which acts as a mediator to infer temperature conditions, providing precise temperature information without adding complex sensing hardware.
2Speed
If air-to-air or water-to-air cooling techniques are used, then temperature regulation capability is provided, but response speed is limited due to extra time constants
Solution Approach 1:
The system performs preliminary measurement of power dissipation to predict temperature changes before they occur. By monitoring power consumption in real-time, the system can anticipate temperature variations and activate cooling mechanisms proactively, reducing the effective response time and minimizing temperature oscillations before they develop.
Solution Approach 2:
The system implements continuous feedback by monitoring power dissipation and using this information to dynamically adjust cooling mechanisms. The feedback loop uses real-time power measurement data to modulate cooling intensity, enabling rapid response to temperature changes and maintaining temperature stability with minimal oscillation.
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 allows for fast and accurate temperature stabilization, reducing temperature fluctuations and improving detector performance by aligning heat dissipation with system requirements, thereby enhancing the operational efficiency of PET and CT scanners.
Implementation Method 1
an integrated circuit (IC) electrically and thermally coupled to the detector
Implementation Method 2
dissipating power in a power dissipation element from a power supply of the IC
Data Source
AI summary
An example apparatus for temperature compensation in an imaging system is described. The apparatus includes an analog front end configured to receive a signal from a detector of the imaging system, the analog front end being integrated in an integrated circuit (IC) electrically and thermally coupled to the detector; a low-pass filter coupled to an output of the analog front end and configured to output a first signal; a first circuit configured to output a second signal based on power consumed by the IC; and a second circuit configured to receive the first and second signals and output a third signal in response to the first and second signals.