MRI Scan Parameter Adjustment for Implant Safety
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Solution Overview
Problem
The increasing number of patients with implant devices poses safety concerns during magnetic resonance imaging (MRI) scans, leading to restrictions that deprive them of proper diagnosis and treatment opportunities, as existing MRI techniques lack effective methods to safely image patients with implants.
Innovation Solution
A magnetic resonance imaging scan method and system that determines and adjusts scan parameters in real-time based on implant device information, including gradient magnetic field intensity, radio frequency magnetic field intensity, main magnetic field spatial gradient intensity, temperature, and specific absorption rate (SAR), to ensure safe imaging by issuing warnings and adjusting parameters when thresholds are exceeded.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If MRI scans are performed on patients with implant devices using conventional parameters, then diagnostic capability is improved, but safety risks increase due to unknown effects on implant devices
Solution Approach 1:
The system performs preliminary actions by obtaining implant device information before the MRI scan, determining safe scan parameters in advance, and setting warning thresholds prior to imaging. This preliminary preparation ensures both diagnostic capability and safety by pre-configuring appropriate parameters based on the specific implant device characteristics.
Solution Approach 2:
The system continuously monitors scan parameters during the MRI process and compares them against predetermined safe thresholds. When parameters approach or exceed safety limits, the system provides feedback through warnings to operators, enabling real-time adjustments to maintain both diagnostic quality and patient safety.
2Reliability
If MRI examinations are prohibited for patients with implant devices, then safety risks are reduced, but diagnostic opportunities are lost
Solution Approach 1:
The system resolves this contradiction by dynamically changing scan parameters based on implant device information. Instead of a blanket prohibition, the system adjusts magnetic field strength, scan duration, and other parameters to safe levels specific to each implant type, enabling diagnostic imaging that would otherwise be prohibited while maintaining safety.
Solution Approach 2:
The system applies local quality by tailoring scan parameters to the specific characteristics and location of the implant device. Different regions of the body and different implant types receive customized parameter settings, allowing diagnostic imaging in areas远离 the implant while using reduced parameters near the implant device.
3Productivity
If standard scan parameters are used without adjustment, then scan efficiency is maintained, but patient comfort and safety deteriorate due to excessive magnetic field exposure
Solution Approach 1:
The system transitions from static, fixed scan parameters to dynamic, adaptive parameters that change based on real-time monitoring of implant device responses and patient conditions. This allows the system to maintain high efficiency when safe while automatically reducing exposure when safety concerns arise.
Solution Approach 2:
The system performs self-service by automatically determining safe parameters, monitoring scan conditions, and adjusting settings without requiring manual intervention. This automated self-adjustment maintains scan efficiency while protecting patient safety and comfort through continuous parameter optimization.
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 safe MRI scans for patients with implant devices by setting relatively safe scan parameters and adjusting them in real-time, mitigating discomfort and improving safety, thus allowing for proper diagnosis and treatment while minimizing risks associated with implant devices.
Implementation Method 1
MRI uses a magnet having a strong magnetic field to generate a static magnetic field B0. When a to-be-imaged part of the human body is positioned in the static magnetic field B0, nuclear spin associated with hydrogen nuclei in human tissue is polarized
Implementation Method 2
After a radio-frequency field B1 intersecting the direction of the static magnetic field B0 is applied, the direction of rotation of protons changes so that the tissue of the to-be-imaged part generates a transverse magnetization vector
Implementation Method 3
After the radio-frequency field B1 is removed, the transverse magnetization vector decays in a spiral manner until it is restored to zero. A free induction decay signal is generated during decay
Data Source
AI summary
The present application provides a magnetic resonance imaging scan method, a magnetic resonance imaging system, and a non-transitory computer-readable storage medium. The magnetic resonance imaging scan method comprises indicating in real time values of parameters associated with an implant device in a tested object and safety status of one or a plurality of the parameters during performing an imaging scan.