Movable MRI Coil Transceiver Positioning for Stable Wireless Links
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Solution Overview
Problem
Existing magnetic resonance imaging (MRI) systems face challenges in maintaining high-quality wireless communication due to interference from static magnetic fields and radio frequency irradiation, particularly when using wireless transceivers fixed to the top plate, which affects image quality.
Innovation Solution
A magnetic resonance imaging apparatus with a slidable top plate and a moving mechanism for wireless transceivers that adjusts their position to minimize interference from static magnetic fields, using a controller to determine optimal movement based on imaging parts and body position, ensuring high-quality wireless communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If wireless transceiver is fixed to the top plate, then wireless communication is simplified, but communication quality deteriorates due to static magnetic field interference
Solution Approach 1:
The patent applies the dynamics principle by making the wireless transceiver movable rather than fixed. The transceiver is mounted on the top plate but can be positioned at different locations along the longitudinal direction. The controller dynamically adjusts the transceiver position based on the imaging region, moving it to locations with weaker static magnetic fields when imaging regions that cause strong interference, thereby maintaining communication quality without oversimplifying the system.
2Object-affected harmful factors
If wireless transceiver is moved away from end part of top plate, then static magnetic field interference is reduced, but device complexity increases
Solution Approach 1:
The system uses a movable mounting structure that allows the wireless transceiver to be dynamically repositioned along the longitudinal direction of the top plate. The controller determines the appropriate position based on imaging region information and moves the transceiver to minimize static magnetic field interference. This dynamic adjustment reduces harmful interference without requiring complex additional shielding or filtering mechanisms.
Solution Approach 2:
The controller acts as an intermediary that coordinates between the imaging system and the wireless transceiver positioning. It receives imaging region information, determines the optimal transceiver position to minimize interference, and controls the moving mechanism accordingly. This intermediary control simplifies the overall system by using intelligent positioning rather than complex interference mitigation hardware.
3Adaptability or versatility
If top plate is made slidable, then flexibility in positioning is improved, but mechanical complexity increases
Solution Approach 1:
The top plate incorporates a sliding mechanism that serves multiple functions: it enables the wireless transceiver to be repositioned for optimal communication positioning, allows adjustment of the top plate relative to the imaging region, and provides flexibility for different imaging scenarios. This multi-functional sliding mechanism improves adaptability without requiring separate adjustment mechanisms for each function, thereby limiting the increase in mechanical complexity.
Data Source
AI summary
A magnetic resonance imaging apparatus according to one aspect of the present invention includes: a top plate on which a subject is placed, the top plate being slidable in a longitudinal direction; a first wireless transceiver connected to a receive coil for capturing a magnetic resonance image of the subject; a moving mechanism that moves the first wireless transceiver in a direction away from an end part of the top plate in the longitudinal direction; a second wireless transceiver; and a controller that controls movement of the first wireless transceiver via the moving mechanism and wireless communication using the first wireless transceiver and the second wireless transceiver, in which the controller determines a movement amount of the first wireless transceiver via the moving mechanism and performs the wireless communication by moving the first wireless transceiver by the determined movement amount via the moving mechanism.