Four-Coil Magnetic Nanoparticle Positioning With RF Feedback
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Solution Overview
Problem
Existing magnetic nanoparticle drug delivery systems face challenges in accurately localizing and driving magnetic nanoparticles to a region of interest due to aggregation and size limitations, requiring a simplified system for position recognition and control.
Innovation Solution
An integrated system using four radially spaced electromagnetic coils, an RF coil unit, and a driving unit to generate and control field free points/lines for precise positioning and movement of magnetic nanoparticles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional magnetic nanoparticle drug delivery systems are used, then targeted drug delivery can be achieved, but particle aggregation in the vascular environment makes nanoparticle imaging difficult and reduces driving efficiency
Solution Approach 1:
The patent extracts and eliminates the harmful aggregation effect by using a simplified magnetic field generation system with only four electromagnetic coils instead of traditional complex systems. This extraction approach removes the source of the harmful aggregation problem while maintaining the essential function of nanoparticle manipulation, thereby improving imaging accuracy and driving efficiency.
Solution Approach 2:
The patent implements feedback control by using the RF coil unit to detect the position of magnetic nanoparticles in real-time and feed this information back to the processing unit. The processing unit then adjusts the electromagnetic coil currents accordingly, creating a closed-loop system that compensates for particle aggregation and maintains precise positioning despite harmful environmental factors.
2Measurement precision
If complex magnetic field generation systems are used to drive magnetic nanoparticles, then positioning accuracy can be improved, but system complexity and installation space requirements increase
Solution Approach 1:
The patent merges the functions of magnetic field generation and position detection into a single integrated system using only four electromagnetic coils. The RF coil unit is combined with the electromagnetic coils to serve dual purposes, eliminating the need for separate complex systems while maintaining positioning accuracy through unified control and detection.
Solution Approach 2:
The four electromagnetic coils are designed to perform multiple functions: generating magnetic fields for nanoparticle manipulation, detecting nanoparticle positions through RF signal resonance, and providing feedback for control. This multi-functionality reduces system complexity by eliminating redundant components while maintaining high positioning accuracy.
3Power
If traditional electromagnetic coil arrangements are used, then magnetic field generation capability is sufficient, but the number of coils required increases installation space and reduces patient accessibility
Solution Approach 1:
The patent segments the magnetic field generation function into four strategically positioned electromagnetic coils arranged in a compact configuration. This segmentation allows each coil to contribute independently to the overall magnetic field, maintaining sufficient field generation capability while reducing the total number of coils and installation space required compared to traditional arrangements.
Solution Approach 2:
The patent optimizes the spatial arrangement of the four electromagnetic coils by transitioning from traditional planar arrangements to a three-dimensional configuration. This dimensional change allows the coils to generate sufficient magnetic fields with reduced footprint, decreasing installation space and improving patient accessibility while maintaining magnetic field generation capability.
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 system enables accurate positioning and driving of magnetic nanoparticles with reduced coil usage, simplifying installation space and improving patient accessibility.
Implementation Method 1
a magnetic field generating unit including four electromagnetic coils radially spaced apart from each other by the same distance
Implementation Method 2
an RF coil unit disposed in a through-hole included in the center of the coil frame
Implementation Method 3
a driving unit orthogonal to the coil frame and connected to allow the coil frame to slide in one axial direction
Data Source
AI summary
The present disclosure relates to an integrated system for driving a magnetic body and recognizing the position thereof. The system includes a magnetic field generating unit having four electromagnetic coils radially spaced apart from each other by the same distance and a coil frame to which the electromagnetic coils are connected, an RF coil unit disposed in a through-hole included in the center of the coil frame, a driving unit orthogonal to the coil frame and connected to allow the coil frame to slide in one axial direction, and a processing unit configured to generate movement path information of the coil frame and desired current information of each of the electromagnetic coils.