Pediatric RF Coil Assembly for MRI Signal-to-Noise Ratio
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Solution Overview
Problem
Standard RF coils designed for adult patients are inadequate for pediatric MRI, leading to suboptimal signal-to-noise ratio and image quality due to poor geometric alignment and coil size issues, especially when used with children.
Innovation Solution
A pediatric RF coil assembly comprising a flexible body coil and a head coil, designed to surround and abut the child's body and head respectively, allowing for precise positioning and improved signal reception, with a handle for easy transfer to an MRI system, and integrated RF coils for enhanced signal detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If standard RF coils designed for adult patients are used for pediatric MRI, then the existing coil can be utilized, but the signal-to-noise ratio and image quality deteriorate due to poor geometric alignment and size mismatch
Solution Approach 1:
The patent applies local quality by designing RF coils with specific geometries and sizes tailored to different body parts and age groups. The head coil, body coil, and leg coil each have distinct dimensions and configurations optimized for their respective anatomical regions, ensuring optimal signal-to-noise ratio for pediatric patients of various sizes.
Solution Approach 2:
The patent implements parameter changes by offering multiple coil options with varying physical dimensions, frequencies, and geometries. The system includes coils with different loop areas, winding configurations, and resonant frequencies to match the smaller anatomy of pediatric patients, thereby improving signal detection capability.
2Stability of the object's composition
If filling materials and sedation are used to position the child, then the child can be kept in a fixed position, but the geometric relationship between the coil and body becomes unknown or undesired
Solution Approach 1:
The patent applies dynamics by designing flexible positioning systems that can adapt to the patient's body shape. The positioning aids and coil designs allow for dynamic adjustment to accommodate different pediatric body sizes and positions, ensuring optimal geometric relationship without requiring excessive filling materials or sedation.
3Measurement precision
If a dedicated pediatric RF coil assembly is designed and sized for a child, then the signal-to-noise ratio and image quality improve, but the device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the pediatric imaging system into separate, specialized coils for different body parts (head coil, body coil, leg coil). This modular approach allows each coil to be optimized for its specific function while maintaining manageable complexity through standardized connection interfaces and interchangeable designs.
Solution Approach 2:
The patent implements universality by designing coils with adjustable and reconfigurable features that can serve multiple imaging scenarios. The positioning aids and coil structures are designed to accommodate various pediatric body sizes and imaging protocols, reducing the need for entirely separate specialized equipment.
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 pediatric RF coil assembly significantly enhances the signal-to-noise ratio and image quality in pediatric MRI by optimizing coil placement and alignment, facilitating efficient workflow and improved diagnostic imaging.
Implementation Method 1
The RF system includes antennas (e.g., coils) that are used to send RF pulses (e.g., transmitter coils) and/or receive magnetic resonance (MR) signals (e.g., receiver coils). The RF pulses produce an electromagnetic field that flips or changes the alignment of the nuclear magnetization of the atoms.
Implementation Method 2
The main magnetic field produced by the magnet aligns the nuclear magnetization of atoms in the body of the patient.
Implementation Method 3
The gradient system spatially varies the main magnetic field with corresponding pairs of gradient coils, such that the position of a slice to be imaged may be precisely located.
Implementation Method 4
When the electromagnetic field is turned off, the nuclear magnetization of the atoms decays to the natural alignment of the atoms within the main magnetic field, and the atoms release excess stored energy. When the atoms release the excess stored energy, the atoms give off MR signals that are received by the receiver coils of the RF system.
Data Source
AI summary
In order to increase the signal to noise ratio, and thus increase the quality of images produced during pediatric MRI, a pediatric RF coil assembly includes a head coil and a flexible body coil in a single dedicated device shaped and sized for a child. The flexible body coil may be operable to at least partially surround and abut the body of the child located on the pediatric RF coil assembly, while the head coil may at least partially surround and abut the head of the child located on the pediatric RF coil assembly. In order to optimize workflow, the child may be positioned on the pediatric RF coil assembly in a first room and moved to a second room including an MRI system after the child is brought to sleep or sedated in the first room. The pediatric RF coil assembly and the child may be moved to the second room using a handle rotatably attached to the pediatric RF coil assembly, and may be positioned on a patient table of the MRI system when the imaging process is to begin.