Microwave Ablation Antenna Radiation Detector for Stray Energy Control
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Solution Overview
Problem
Conventional microwave antennas often inadvertently radiate energy outside the tissue during microwave ablation procedures, leading to unintended radiation and potential harm.
Innovation Solution
A radiation detector is integrated into the microwave antenna assembly, comprising a receiving antenna with concentric tubular members and a rectifying circuit that converts microwave energy into a detection signal, allowing for real-time monitoring and control of stray radiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If microwave ablation antennas are used to heat tumor cells, then cancerous cells are destroyed, but unintended radiation outside the tissue occurs causing potential harm
Solution Approach 1:
The patent implements a feedback mechanism by integrating a radiation detector that continuously monitors microwave energy radiation levels during ablation procedures. The detector provides real-time feedback signals to the control system, which automatically adjusts or terminates microwave power delivery when predetermined safety thresholds are exceeded, thereby preventing unintended radiation damage while maintaining effective tumor treatment
Solution Approach 2:
The patent introduces an intermediary radiation detector component that acts as a mediator between the microwave antenna and the surrounding tissue. This detector monitors the electromagnetic field in real-time and provides early warning of stray radiation before it can cause harm to adjacent healthy tissue, enabling preventive control measures
2Object-affected harmful factors
If radiation detectors are integrated into microwave antenna assemblies, then stray radiation can be detected and controlled, but device complexity increases
Solution Approach 1:
The patent merges the radiation detector, control system, and microwave antenna into a single integrated assembly. The detector is positioned in close proximity to the antenna elements, and the control system is embedded within the antenna housing, creating a compact unified device that reduces overall system complexity while maintaining comprehensive radiation monitoring and control capabilities
Solution Approach 2:
The patent designs the antenna assembly to perform multiple functions: the same structure serves as both the microwave radiation source for tumor ablation and the mounting platform for the radiation detector. The control system simultaneously manages both power delivery to the antenna and monitoring of radiation levels, eliminating the need for separate dedicated components and reducing overall device complexity
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 radiation detector effectively identifies and mitigates unintended microwave energy leakage, ensuring safe operation by shutting off the power supply or alerting the user when safety thresholds are exceeded, thereby preventing tissue damage and ensuring precise treatment.
Implementation Method 1
a receiving antenna adapted to receive microwave energy radiating along the microwave antenna
Implementation Method 2
a rectifying circuit including a rectifying device and a filter. The rectifying circuit rectifies the microwave energy incident on the receiving antenna into a sensing signal
Implementation Method 3
The rectifying circuit rectifies the microwave energy incident on the receiving antenna into a sensing signal and then passes the sensing signal through the filter
Implementation Method 4
microwave energy radiates perpendicularly from the axis of the conductor
Implementation Method 5
microwave energy is used to coagulate and/or ablate tissue to denature or kill the cancerous cells
Data Source
AI summary
A radiation detector is disclosed. The radiation detector is disposed on a microwave antenna assembly. The radiation detector includes a receiving antenna adapted to receive microwave energy. The receiving antenna includes a first tubular antenna member and a second tubular antenna member disposed concentrically about a longitudinal axis defined by the microwave antenna assembly. The detector also includes at least one rectifier coupled to the receiving antenna adapted to rectify at least a portion of the microwave energy and a filter coupled to the at least one rectifier and adapted to convert the rectified microwave energy into a detection signal.