MRI Implant Positioning Control with 3D Field-Gradient Mapping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing magnetic resonance imaging (MRI) systems pose safety risks to patients with implants due to the strong magnetic forces and torques caused by the system's magnetic field gradients, which are difficult to accurately assess and manage using conventional methods relying on manual estimation and visual observation.
Innovation Solution
A magnetic resonance scanning control method that utilizes a three-dimensional body model of the patient, marked with implant information, combined with real-time positioning data to evaluate safety risks related to spatial field gradients, allowing for precise adjustment of patient positioning to avoid unsafe gradient areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual estimation and visual observation are used to determine safe positioning, then the operation process is simple, but the measurement precision of implant positioning is insufficient
Solution Approach 1:
The patent creates a three-dimensional body model that copies the patient's anatomical structure and implant positions. This virtual model allows precise positioning assessment without requiring complex physical measurement devices during the scanning process, resolving the contradiction between measurement precision and device complexity
Solution Approach 2:
The patent transitions from two-dimensional contour line representations to a three-dimensional virtual space with spatial field gradient distribution. This dimensional enhancement enables more accurate implant positioning assessment while integrating seamlessly with the existing MRI system workflow
2Reliability
If experience-based visual assessment is used, then the operation process is quick, but the reliability of safety determination is low
Solution Approach 1:
The patent implements a feedback mechanism where the system automatically evaluates implant positioning safety by comparing the virtual implant model with the spatial field gradient distribution. This automated feedback loop provides reliable safety determination without requiring time-consuming manual assessment by physicians
Solution Approach 2:
The system performs self-assessment of positioning safety by automatically calculating whether implants will be exposed to unsafe magnetic field gradients during scanning. This self-service capability eliminates the need for extensive physician expertise while maintaining high reliability
3Productivity
If conservative positioning estimation is used, then patient safety is protected, but the productivity of scanning is reduced
Solution Approach 1:
The patent performs preliminary assessment of implant positioning safety before the actual MRI scan by simulating the scanning trajectory in the virtual space. This preliminary action identifies safe positioning options that maintain both patient safety and scanning efficiency, avoiding conservative restrictions on productive scanning protocols
Data Source
AI summary
Embodiments of the present invention disclose a magnetic resonance system and a magnetic resonance scanning control method, the method comprising: acquiring a three-dimensional body model of a scan subject; receiving a user operating instruction to mark an implant in the three-dimensional body model of the scan subject to generate a simulated scan subject; acquiring current positioning information of the scan subject on a scanning table, and determining, on the basis of the current positioning information, virtual positioning information of the simulated scan subject in a virtual space, the virtual space comprising distribution information of a spatial field gradient of the magnetic resonance system; and on the basis of the virtual positioning information, evaluating a safety risk related to the spatial field gradient.