Dielectric Heating Modulator for Selective Biological Target Thermal Treatment
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Solution Overview
Problem
Existing devices using radio frequency (RF) or microwave electromagnetic fields for therapeutic heating, such as focused microwave thermotherapy, fail to evenly heat the entire thickness of a treatment region due to amplitude decrease with depth, leading to suboptimal therapeutic outcomes.
Innovation Solution
An apparatus and method employing a dielectric heating modulator, which can be an electrically conductive, polar, or ionic material associated with a targeting moiety, is used to selectively heat biological targets by applying an alternating electric field between electrodes, ensuring faster heating of the target without harming non-targets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If electromagnetic field (RF or microwave) is used for therapeutic heating, then heating capability is achieved, but heating uniformity across treatment region thickness deteriorates
Solution Approach 1:
The treatment region is divided into multiple discrete heating zones along the thickness direction, with each zone equipped with independently controllable heating elements. This segmentation allows differential heating control for different depth regions, resolving the uniformity issue while maintaining overall heating capability.
Solution Approach 2:
Different regions within the treatment zone are assigned different heating characteristics through locally adjustable heating elements. The system applies tailored heating parameters to specific depth regions, enabling precise control over temperature distribution across the treatment region thickness.
2Length of stationary object
If electromagnetic field amplitude is increased to penetrate deeper into treatment region, then heating depth is improved, but heating uniformity deteriorates due to amplitude decrease with depth
Solution Approach 1:
The heating system employs dynamic control of heating element activation and power levels based on real-time temperature feedback from different depths. This dynamic adjustment compensates for the natural amplitude decay of electromagnetic fields, maintaining uniform heating across varying depths.
Solution Approach 2:
The system applies periodic heating cycles with varying intensity and duration to different depth zones. By alternating heating phases and using pulse modulation, the system achieves deep penetration while maintaining temperature uniformity through temporal control rather than relying solely on field amplitude.
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
This approach allows for precise and efficient heating of biological targets, achieving desired therapeutic outcomes by ensuring even heating throughout the treatment region and minimizing damage to non-target cells.
Implementation Method 1
The dielectric heating modulator may consist of an electrically conductive material, a polar material and/or an ionic material... activating the generator to apply the alternating electric field between the first and second electrodes and across the treatment region to thereby heat the treatment region, wherein the dielectric heating modulator causes the biological target to heat at a faster rate than non-targets within the treatment region
Implementation Method 2
Devices that utilize an electromagnetic field—whether operating at RF or microwave frequencies—do not evenly heat the entire thickness of a treatment region
Data Source
AI summary
An apparatus and method for selectively heating a biological target within a treatment region of a subject is disclosed. The method includes administering to the subject a dielectric heating modulator that becomes associated with the biological target. The method also includes positioning the treatment region between first and second electrodes connected to a generator, and activating the generator to apply an alternating electric field between the first and second electrodes and across the treatment region to thereby heat the treatment region. The dielectric heating modulator causes the biological target to heat at a faster rate than non-targets within the treatment region, which preferably results in the killing of the biological target.