Multi-layer flat coil magnetic transmitters for fluoroscopic clarity
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Solution Overview
Problem
Conventional medical device navigation systems using fluoroscopic imaging are limited by the need for high levels of electromagnetic radiation, which poses health risks to patients and practitioners, and also suffer from magnetic field transmitters that can occlude fluoroscopic images.
Innovation Solution
A magnetic field generator assembly with interlacing layers of conductive material arranged in rectangular spiral formations is used to generate strong magnetic fields while minimizing occlusion of fluoroscopic images, thereby reducing radiation exposure and improving image clarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional magnetic field transmitters are used, then magnetic field generation is achieved, but fluoroscopic image occlusion increases
Solution Approach 1:
The patent transitions from planar coil configurations to three-dimensional interlaced coil structures. Multiple layers of conductive elements are woven together in a 3D configuration, allowing the magnetic field transmitter to generate sufficient magnetic field strength while maintaining radiolucency in fluoroscopic images by distributing material throughout the volume rather than concentrating it in a single plane.
Solution Approach 2:
The magnetic field transmitter is divided into multiple discrete conductive layers that are interlaced together. Each layer contains segmented conductive elements arranged in specific patterns, and the layers are stacked and interwoven to create a composite structure that achieves the desired magnetic field properties while minimizing image occlusion.
2Measurement precision
If magnetic field strength is increased, then navigation precision is improved, but fluoroscopic occlusion increases
Solution Approach 1:
The patent employs composite structures combining multiple conductive materials in an interlaced configuration. Different layers may use different conductive materials or patterns, creating a composite transmitter that optimizes magnetic field generation while maintaining radiolucency. The composite nature allows tuning of magnetic properties independent of radiographic appearance.
Solution Approach 2:
Different regions of the interlaced coil structure have different local properties. Certain areas have higher conductor density for enhanced magnetic field generation, while other areas are more sparse to maintain radiolucency. The conductive elements are locally arranged to create specific magnetic field patterns while minimizing overall occlusion.
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 solution enhances magnetic field strength and reduces fluoroscopic occlusion, allowing for safer and more efficient navigation of medical devices during procedures while minimizing radiation exposure.
Implementation Method 1
a first plurality of elongate conductive elements arranged in a first plane, wherein each of the first plurality of elongate conductive element winds around a first central axis, extending perpendicular to the first plane, in a first spiral formation; and a second plurality of elongate conductive elements arranged in a second plane
Data Source
AI summary
A magnetic field generator assembly is configured to be associated with a table supporting a body. The magnetic field generator comprises a plurality of magnetic field transmitters, each comprising interlacing layers of conductive material, configured to provide increased magnetic strength and minimal fluoroscopic occlusion. The interlacing layers of conductive material can be arranged in rectangular spiral formations.