Multi-Sensor Rod for Fast MRI Fringe Field Mapping
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Solution Overview
Problem
The manual process of acquiring magnetic field strength data outside a transport container of a mobile magnetic resonance device is time-consuming and inefficient, particularly due to the need for individual measurements at each point with a grid density of 20×20 cm or 10×10 cm up to a height of 2 m, which is crucial for ensuring patient safety.
Innovation Solution
A measuring device equipped with a sensor rod containing multiple magnetic field sensors spaced evenly apart, allowing simultaneous acquisition of magnetic field strength data at multiple points, facilitated by a travel unit with wheels and a controller for automated positioning, and a position detection unit for precise location data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual measurement at each grid point is used, then measurement precision is ensured, but measurement time increases significantly
Solution Approach 1:
The measurement space is divided into multiple measurement points arranged in a grid pattern (e.g., 20×20 cm or 10×10 cm spacing). Multiple magnetic field sensors are distributed at these segmented positions to simultaneously capture field strength data across the entire measurement volume, maintaining precision while reducing total measurement time.
Solution Approach 2:
The measurement system transitions from single-point sequential measurement to multi-point parallel measurement by adding spatial dimensionality. Multiple sensors are positioned at different heights (up to 2 m) and horizontal locations, creating a three-dimensional measurement network that captures the magnetic field distribution simultaneously across space.
2Productivity
If multiple magnetic field sensors are used, then measurement efficiency is improved, but device complexity increases
Solution Approach 1:
Multiple magnetic field sensors are integrated into a single measuring device unit. The sensors are combined with a control unit that coordinates their operation, processes their signals, and manages data acquisition. This merging approach maintains high measurement efficiency while consolidating complexity within one integrated system rather than requiring separate devices for each sensor.
Solution Approach 2:
The measuring device is designed as a multi-functional system that can simultaneously perform measurements at multiple positions and heights. The control unit manages multiple sensors, positions the measurement probe, processes data from all sensors, and generates comprehensive magnetic field maps, making the device universally applicable for complete spatial characterization without requiring multiple specialized instruments.
3Speed
If automated positioning system is implemented, then measurement speed increases, but device complexity and cost increase
Solution Approach 1:
The measuring device incorporates a travel unit with wheels that enables dynamic movement and repositioning. This mechanical mobility allows the device to be quickly transported between measurement locations and adjusted to different heights and positions, significantly increasing measurement speed compared to fixed installations while avoiding the complexity of fully automated robotic positioning systems.
Solution Approach 2:
A control unit serves as an intermediary between the operator and the multiple sensors及travel unit. It coordinates sensor activation, processes signals from all sensors, manages data acquisition timing, and controls the travel unit's movement, thereby automating the measurement process and increasing speed without requiring complex distributed control systems for each individual component.
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 quick and efficient acquisition of location-dependent magnetic field strength data, reducing installation time and enhancing the cost-effectiveness of mobile magnetic resonance devices by minimizing manual effort and ensuring accurate safety assessments.
Implementation Method 1
measuring device may comprise two or more magnetic field sensors arranged on a sensor rod
Data Source
AI summary
The disclosure is directed to a measuring device for acquiring a magnetic field strength in the environment of a magnetic resonance device. The measuring device may include two or more magnetic field sensors. The measuring device may include a sensor rod on which the two or more magnetic field sensors are arranged and distributed.