Planar Open MRI Magnet with Dynamic Field Adjustment for Motion Artifacts
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Solution Overview
Problem
Conventional MRI apparatuses, especially cylindrical ones, pose challenges for patients with claustrophobia due to enclosed spaces, and all MRI systems face difficulties in maintaining patient stability during imaging, leading to potential movement artifacts in generated images.
Innovation Solution
A planar open magnet MRI apparatus with current-driven magnets that adjust magnetic field strength based on patient movement, using control circuitry and detectors to dynamically set the imaging region, ensuring consistent magnetic resonance frequency despite patient motion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a planar open magnet MRI apparatus is used to provide open space for imaging, then patient comfort and accessibility are improved, but patient movement during imaging increases
Solution Approach 1:
The patent applies dynamics by making the magnetic field configuration adaptable and changeable during imaging. The control circuitry dynamically adjusts the magnetic field strength and imaging region parameters in real-time based on patient movement, transforming the static magnetic field system into a dynamic one that can respond to and compensate for patient motion, thereby maintaining image quality despite increased patient freedom of movement in the open magnet configuration.
Solution Approach 2:
The patent implements parameter changes by modifying magnetic field strength and imaging region parameters during the imaging process. The control circuitry adjusts these parameters in response to detected patient movement, changing the operational parameters of the MRI system to maintain optimal imaging conditions despite patient motion in the open magnet configuration.
2Adaptability or versatility
If imaging is performed in open space with planar magnets, then claustrophobic patients can be imaged, but image quality deteriorates due to patient movement
Solution Approach 1:
The patent implements feedback by using control circuitry that continuously monitors patient movement during imaging and uses this information to adjust magnetic field parameters and imaging region settings in real-time. This closed-loop feedback system compensates for patient motion, maintaining image quality standards while allowing claustrophobic patients to be imaged in the open magnet configuration.
Solution Approach 2:
The patent applies dynamics by making the magnetic field configuration adaptable and changeable during imaging. The control circuitry dynamically adjusts the magnetic field strength and imaging region parameters in real-time based on patient movement, transforming the static magnetic field system into a dynamic one that can respond to and compensate for patient motion, thereby maintaining image quality despite increased patient freedom of movement in the open magnet configuration.
3Manufacturing precision
If cylindrical MRI apparatus is used to restrict patient movement, then image quality is maintained, but patient comfort deteriorates due to enclosed space
Solution Approach 1:
The patent applies dynamics by making the magnetic field configuration adaptable and changeable during imaging. The control circuitry dynamically adjusts the magnetic field strength and imaging region parameters in real-time based on patient movement, transforming the static magnetic field system into a dynamic one that can respond to and compensate for patient motion, thereby maintaining image quality despite increased patient freedom of movement in the open magnet configuration.
Solution Approach 2:
The patent implements parameter changes by modifying magnetic field strength and imaging region parameters during the imaging process. The control circuitry adjusts these parameters in response to detected patient movement, changing the operational parameters of the MRI system to maintain optimal imaging conditions despite patient motion in the open magnet configuration.
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
Enables imaging of claustrophobic patients in an open space and maintains image quality by dynamically adjusting the magnetic field to match patient movement, reducing artifacts and ensuring consistent magnetic resonance frequency.
Implementation Method 1
a current-driven magnet that generates a magnetic field predominantly determining a magnetic resonance frequency
Implementation Method 2
a detector that detects a position of an object to be imaged in a movable state in the magnetic field
Data Source
AI summary
In one embodiment, an MRI apparatus includes: a current-driven magnet configured to generate a magnetic field that predominantly determine a magnetic resonance frequency; a detector configured to detect a position of an object to be imaged in a movable state in the magnetic field; and control circuitry configured to set an imaging region of the object depending on a motion of the object by controlling a drive current of the current-driven magnet based on the detected position of the object.