Electromagnetic Field Spatial Distribution Control via Inflection Frequency
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Solution Overview
Problem
Current electromagnetic field applications in biological tissues lack precise control over the spatial distribution of energy, often resulting in highest intensity at unintended tissue locations near electrodes rather than the intended target.
Innovation Solution
Determining the inflection frequency of the biological tissue's impedance and correlating it with the inflection frequency for energy application to select appropriate excitation frequencies, allowing for controlled spatial distribution of electromagnetic fields by focusing energy below or above these frequencies, and combining multiple distributions for desired outcomes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If electromagnetic fields are applied through electrodes to treat biological tissue, then therapeutic effects are achieved, but the highest field intensity is concentrated at unintended locations near the electrodes rather than at the intended target
Solution Approach 1:
The patent applies parameter changes by utilizing different excitation frequencies to alter the spatial distribution of electromagnetic fields. By selecting specific frequencies relative to the tissue's inflection frequency, the system can control where the highest field intensity occurs, thereby achieving precise spatial targeting without changing the electrode configuration or application method
2Power
If high power electromagnetic fields are used for tissue ablation, then effective treatment of neoplastic diseases is achieved, but energy is deposited at unintended locations near electrodes
Solution Approach 1:
The patent resolves this contradiction by changing the frequency parameter of the electromagnetic field. By operating at frequencies above or below the inflection frequency, the system maintains high power for effective tissue ablation while precisely controlling the spatial distribution of energy deposition to target intended locations and spare surrounding healthy tissue
3Productivity
If electromagnetic fields are applied to excite biological tissues, then therapeutic activation is achieved, but the spatial distribution of field intensity cannot be precisely controlled
Solution Approach 1:
The patent achieves both effective tissue excitation and precise spatial control by adjusting the excitation frequency parameter. When the excitation frequency is above the inflection frequency, the field distributes differently than when below it, allowing optimization of both excitation effectiveness and spatial targeting for various therapeutic applications
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
Enables targeted delivery of electromagnetic fields to specific areas within biological tissues, enhancing the precision and effectiveness of therapeutic applications by custom-tailoring the spatial distribution of energy deposition.
Implementation Method 1
an inflection frequency of an impedance of the biological tissue is determined and, based upon the determination, an excitation frequency is selected that is above or below the inflection frequency
Implementation Method 2
an excitation frequency is selected that is above or below the inflection frequency to obtain a desired spatial distribution for an electromagnetic field that results from applying a voltage or current at the selected excitation frequency
Data Source
AI summary
In one embodiment, controlling the spatial distribution of an electromagnetic field in a system involves determining an inflection frequency for energy applied to the system below which a first spatial distribution results and above which a second spatial distribution results, selecting an excitation frequency to be used to generate an electromagnetic field to be applied to the system based upon the determined inflection frequency, and applying an electromagnetic field generated using the selected excitation frequency.