Flexible RF Coil Assembly for MRI
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Solution Overview
Problem
Conventional RF coils in MRI systems are rigid and inflexible, which limits their ability to conform to the contours of the patient's body, degrading image quality and patient comfort due to their bulky and heavy design, and requires strict placement to prevent coupling interactions that can further degrade imaging quality.
Innovation Solution
A flexible RF coil assembly with pivotable and bendable sections, each comprising a flexible RF coil with distributed capacitance wire conductors encapsulated by a dielectric material, allowing for closer proximity to the body and improved signal-to-noise ratio, and a coil-interfacing cable with integrated transparency functionality to minimize heat load and avoid rigid electronic components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If conventional rigid RF coils are used, then structural stability is maintained, but the ability to conform to patient body contours deteriorates
Solution Approach 1:
The RF coil assembly is divided into multiple movable sections that can independently adjust their positions and orientations. Each section contains RF coil elements that can be positioned separately, allowing the overall assembly to conform to complex body contours while maintaining structural integrity through the modular design.
Solution Approach 2:
The RF coil assembly incorporates movable sections with pivotable joints and adjustable positioning mechanisms, transforming the rigid structure into a dynamic system. This allows the coil sections to move and adapt to different patient body shapes and sizes while maintaining stable electrical connections and structural coherence.
2Ease of operation
If rigid RF coil assemblies are used, then manufacturing simplicity is maintained, but patient comfort deteriorates
Solution Approach 1:
The assembly is segmented into modular sections that can be manufactured separately using standardized components and then assembled. This modular approach maintains manufacturing simplicity through repetition of standard parts while enabling the flexible configuration needed for patient comfort.
Solution Approach 2:
The RF coil sections are designed with flexible mounting structures and thin, adaptable support elements that allow the coil assembly to flex and conform to patient body surfaces. This provides patient comfort similar to flexible coils while using simpler manufacturing processes than fully flexible coil designs.
3Measurement precision
If RF coil sections are positioned closer to the body, then signal-to-noise ratio improves, but coupling interactions between sections increase
Solution Approach 1:
By segmenting the coil assembly into separate movable sections, each section can be independently positioned and oriented. This segmentation allows sections to be placed close to the body for improved signal-to-noise ratio while the separate positioning capability enables adjustment to minimize electromagnetic coupling between adjacent sections.
Solution Approach 2:
The movable sections can be dynamically adjusted during setup to optimize both proximity to the body and spacing between sections. This dynamic positioning capability allows the system to achieve close placement for enhanced signal reception while maintaining sufficient separation or proper orientation to reduce harmful coupling interactions.
4Adaptability or versatility
If multiple rigid coil assemblies are used to accommodate different patient sizes, then versatility is limited, but the number of required assemblies increases
Solution Approach 1:
The RF coil assembly with movable sections is designed as a universal system that can accommodate various patient sizes and anatomical configurations. By adjusting the position and orientation of the modular sections, a single assembly can serve multiple patient types, eliminating the need for multiple specialized rigid coil assemblies.
Solution Approach 2:
The dynamic, adjustable nature of the movable sections allows one coil assembly to adapt to different patient sizes and body contours. This single flexible assembly replaces multiple fixed rigid assemblies, reducing the total quantity needed while increasing versatility across different clinical applications and patient populations.
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 flexible RF coil assembly enhances image quality by improving signal-to-noise ratio and enabling imaging of complex anatomical features, reduces patient discomfort, and decreases the number of required coil assemblies, thereby lowering imaging costs and increasing versatility across different patient sizes.
Implementation Method 1
at least two parallel, distributed capacitance wire conductors encapsulated and separated by a dielectric material
Implementation Method 2
at least two parallel, distributed capacitance wire conductors
Data Source
AI summary
Various methods and systems are provided for radio frequency (RF) coils for magnetic resonance imaging (MRI). In one embodiment, a radio frequency coil assembly for a magnetic resonance imaging system includes: a flexible spine; and at least two RF coil sections each coupled to the flexible spine and movable relative to each other, each RF coil section comprising at least one flexible RF coil, each RF coil including a loop portion comprising a coupling electronics portion and at least two parallel, distributed capacitance wire conductors encapsulated and separated by a dielectric material.