Loop Type MRI Receiving Coil Perpendicular to Magnetic Field
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Solution Overview
Problem
High field MRI apparatuses face challenges with low signal-to-noise ratio (SNR) due to the use of cage type or surface loop structure receiving coils, which are less effective than loop type coils, and patient discomfort and limited field of view (FOV) positioning issues.
Innovation Solution
A high field MRI apparatus with a loop type receiving coil positioned perpendicularly to the basic magnetic field, utilizing a bracket made of non-ferromagnetic and insulating materials for adjustable support, allowing the coil to be placed closer to the center of the magnetic field and within the FOV, improving SNR and imaging quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a cage type or surface loop structure receiving coil is used in high field MRI apparatus, then the coil can be positioned with the patient's limb parallel to the basic magnetic field, but the signal-to-noise ratio (SNR) is lower
Solution Approach 1:
The patent inverts the conventional approach by positioning the patient's limb perpendicular to the basic magnetic field direction instead of parallel, enabling the use of loop type receiving coils that achieve higher SNR while maintaining operational flexibility through adjustable positioning mechanisms
2Device complexity
If the receiving coil is positioned beyond the patient's head or beside the patient's body, then the coil structure can be simplified, but the coil is nearly beyond the field of view (FOV) and affects patient comfort
Solution Approach 1:
The patent introduces adjustable positioning mechanisms that allow the receiving coil to be dynamically positioned at optimal locations during scanning, enabling the coil to be placed within the FOV for better imaging while maintaining structural simplicity and patient comfort through flexible adjustment
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 SNR, improves imaging quality by maintaining better magnetic field uniformity, and allows for a more comfortable patient position, enabling longer scanning durations with improved imaging range and uniformity.
Implementation Method 1
a basic magnet for generating a basic magnetic field; wherein the basic magnetic field is perpendicular to a direction of a patient's limb
Implementation Method 2
a receiving coil for receiving signals; wherein the receiving coil is perpendicular to the direction of the basic magnetic field
Data Source
AI summary
In a high field magnetic resonance imaging apparatus and a method for obtaining signals having a high signal-to-noise ratio with the receiving coil thereof, the apparatus has at least a basic magnet and a receiving coil, the basic magnet generating a basic magnetic field, and the receiving coil being disposed within the basic magnetic field and forming an accommodating cavity. The accommodating cavity of the receiving coil is perpendicular to the direction of the basic magnetic field and is positioned in the field of view of the apparatus. The receiving coil is a loop type coil. The apparatus can further have a bracket for fixing the receiving coil. In the method, a receiving coil is used to receive signals in a magnetic field, wherein the receiving coil is perpendicular to the direction of the magnetic field. By using the apparatus and the corresponding method since the receiving coil can have a loop type design, the signal-to-noise ratio is increased. Moreover, the receiving coil can be disposed at a position closer to the center of the field of view, so that the imaging quality is improved.