Dome-Type Coil for Uniform TMS Stimulation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional transcranial magnetic stimulation devices require precise positioning and are limited in their ability to stimulate a wider range, making them unsuitable for home treatment and prone to errors due to their localized stimulation capabilities.
Innovation Solution
A dome-type coil device is developed, which generates a magnetic field that extends uniformly over a wider range, maintaining eddy current density while reducing inductance, allowing for effective stimulation even with slight deviations in coil positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a figure-eight coil is used for localized stimulation, then eddy current concentration is improved, but positioning accuracy requirements increase
Solution Approach 1:
The coil is divided into multiple independent circular coils arranged in a specific pattern. Each circular coil contributes to the overall magnetic field distribution, allowing the system to achieve both localized concentration and broader coverage through the combined effect of segmented components.
Solution Approach 2:
Different regions of the coil structure provide different functional qualities - the arrangement and configuration of individual circular coils create zones of varying magnetic field intensity, enabling both concentrated stimulation at specific points and broader stimulation across larger areas depending on the activation pattern.
2Measurement precision
If a conventional coil is used for precise positioning, then stimulation accuracy is improved, but treatment range is limited
Solution Approach 1:
The coil system is segmented into multiple circular coils that can be independently configured. This segmentation allows the magnetic field to be distributed across a broader area while maintaining the ability to concentrate field intensity at specific target locations through selective activation and geometric arrangement.
Solution Approach 2:
The coil arrangement extends stimulation coverage from a single focal point to a two-dimensional distribution pattern. By configuring multiple circular coils in specific spatial relationships, the system achieves broader treatment range while preserving localization capability through geometric field concentration at key positions.
3Area of stationary object
If a dome-type coil is used for broader stimulation, then treatment range is improved, but eddy current density may decrease
Solution Approach 1:
The dome-type coil is constructed from multiple circular coil segments arranged to create an expanded magnetic field distribution. The segmented structure allows the system to cover a broader treatment area while maintaining sufficient eddy current density through the cumulative effect of individual coil contributions and their optimized spatial configuration.
Solution Approach 2:
Multiple circular coils are merged into a unified dome-type configuration where their magnetic fields combine and reinforce each other. This merging effect distributes the magnetic field across a wider area while maintaining adequate field intensity through constructive interference and optimized geometric arrangement of the constituent coils.
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 dome-type coil ensures effective eddy current generation over a broader area, enhancing treatment efficacy and robustness against positioning errors, making it suitable for home use and improving treatment accessibility.
Implementation Method 1
an alternating-current or predetermined current waveform is applied to a stimulation coil placed on the skin of the head to form a variable magnetic field and to induce an eddy current
Implementation Method 2
A dome-type coil device is developed, which generates a magnetic field that extends uniformly over a wider range, maintaining eddy current density
Data Source
AI summary
A coil device for transcranial magnetic stimulation treatment, that generates an overcurrent uniformly across a wide range inside the head of a patient. The coil device includes a winding frame and a coil. A cylindrical surface of the winding frame has: an inner surface section arranged near the cranial surface during use; and an outer surface section forming a convex curved surface protruding towards the outside of the cylindrical surface, relative to a first direction parallel to a neutral axis and a second direction orthogonal to the first direction. The neutral axis draws a convex curve.