Microwave Generator Temperature Correction for Parasitic Junction Errors
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Solution Overview
Problem
Microwave ablation systems face inaccuracies in temperature measurements due to parasitic junctions and other factors, affecting the precision of thermocouple-based temperature monitoring during microwave ablation procedures.
Innovation Solution
A microwave generator system with modular components and decentralized processing, utilizing digitally implemented algorithms to dynamically calculate corrected temperature measurements by compensating for parasitic junctions and other errors, incorporating temperature measurements from multiple modules and considering the generator's state and operational parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If thermocouples are used to measure temperature in microwave ablation systems, then temperature monitoring capability is provided, but measurement accuracy deteriorates due to parasitic junctions and other factors
Solution Approach 1:
The system continuously monitors temperatures at multiple locations (remote thermocouple probe, RTM, SCM, MWM) and uses this feedback to dynamically calculate correction factors. The correction algorithm adjusts the measured temperature based on real-time temperature differences between modules, compensating for parasitic junction errors and other measurement inaccuracies.
Solution Approach 2:
The patent introduces intermediary temperature measurements from multiple modules (RTM, SCM, MWM) that act as mediators to identify and compensate for measurement errors. By measuring temperatures at various points in the signal path and comparing them, the system can isolate and correct the specific errors introduced by parasitic junctions in the thermocouple circuit.
2Reliability
If simple temperature measurement is used, then device complexity is reduced, but measurement reliability deteriorates due to uncorrected errors
Solution Approach 1:
The temperature measurement system is segmented into multiple independent measurement points (remote thermocouple probe, RTM, SCM, MWM). Each module measures temperature independently, and the correction algorithm processes these segmented measurements to produce a reliable corrected temperature value, distributing the measurement function across multiple components.
Solution Approach 2:
The system performs self-diagnosis and self-correction by using its own internal temperature measurements from multiple modules to identify and correct measurement errors. The correction algorithm automatically adjusts the temperature reading based on the temperature differences detected between modules, without requiring external calibration or intervention.
Data Source
AI summary
A method for calculating a corrected temperature value (RTP corrected). The method includes determining a measured temperature value from a remote thermocouple probe (RTP measured), determining a temperature value of a remote thermocouple module (RTM), determining a temperature value of a system controller module (SCM), determining a temperature value of a microwave module (MWM), and calculating the corrected temperature value (RTP corrected). The corrected temperature value (RTP corrected) is based on the determined temperature value of the remote thermocouple probe (RTP measured), the determined temperature value of the system controller module (SCM), and at least one of the determined temperature value of the remote thermocouple module (RTM) or the determined temperature value of the microwave module (MWM).