Gradient Coil Unit for Accessible Interventional MR Imaging
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Solution Overview
Problem
Conventional gradient coil units in magnetic resonance imaging devices limit access to the examination region, making interventional MR imaging cumbersome and inefficient for minimally invasive procedures due to the design of primary and secondary coils, which restrict access from one end of the device.
Innovation Solution
A gradient coil unit designed with a hollow cylindrical primary coil and secondary coil that surrounds the patient receiving region coaxially, featuring a funnel-shaped opening at one end and optimized conductor structure distribution to allow easier access and improved magnetic field gradient homogeneity, enabling effective interventional MR imaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional gradient coil units with primary and secondary coils are used, then magnetic field gradient generation is achieved, but access to the examination region is restricted and interventional MR imaging becomes cumbersome
Solution Approach 1:
The gradient coil unit is divided into three separate coil units (first, second, and third gradient coil units) instead of a single integrated unit. Each coil unit can be independently positioned and adjusted, allowing flexible access to different regions of the examination area while maintaining the overall magnetic field gradient generation capability.
Solution Approach 2:
The patent introduces a spatial arrangement where coil units are positioned at different locations (first, second, and third positions) around the examination region. This dimensional distribution allows medical personnel to access the examination region from multiple directions rather than being constrained by a single fixed coil configuration.
2Manufacturing precision
If the examination region is positioned centrally within the patient receiving region, then magnetic field homogeneity is improved, but accessibility from one end of the device becomes difficult
Solution Approach 1:
By segmenting the gradient coil system into multiple independent coil units positioned at different locations, the patent enables medical personnel to access the centrally positioned examination region more easily. The first gradient coil unit can be positioned to facilitate access while the second and third units maintain magnetic field homogeneity through their coordinated operation.
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
Facilitates easier access to the examination region, enhances magnetic field gradient homogeneity, and allows for more efficient interventional MR imaging by optimizing coil design and conductor distribution, improving accessibility and imaging quality.
Implementation Method 1
A primary coil is typically designed to generate a magnetic field gradient in a spatial direction, particularly within a patient-receiving region
Implementation Method 2
Outside of the patient receiving region, the effect of a primary coil is suppressed to a large extent by a secondary coil allocated to the primary coil
Data Source
AI summary
A gradient coil unit surrounding a cylindrical patient receiving region and including a hollow cylindrical primary coil and a hollow cylindrical secondary coil surrounding the primary coil and the patient receiving region in a coaxial manner, having a first longitudinal end in a longitudinal direction, which is designed to receive an examination object, and a second longitudinal end lying opposite the first longitudinal end in the longitudinal direction, the primary coil having a first length in the longitudinal direction delimited by a first longitudinal position facing the first longitudinal end, and a second longitudinal position, the secondary coil having a second length delimited by a third longitudinal position facing the first longitudinal end, and a fourth longitudinal position, wherein the first length is shorter than the second length and the first longitudinal position has a greater spacing with respect to the first longitudinal end than the third longitudinal position.