MRI Temporomandibular Joint Movement Detection Using Jaw Markers
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for detecting and visualizing temporomandibular joint movement, such as combining axiography and DVT scans, suffer from radiation exposure, inability to display soft tissue, and lengthy procedures.
Innovation Solution
A method using MRI to detect and display temporomandibular joint movement by securing an MRI-visible marker on the lower jaw, generating measurement data sets to create a marker movement curve, and using these data to calculate and visualize the joint's movement path relative to the upper jaw, allowing for separate acquisition of movement and image data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If DVT scan is used to detect temporomandibular joint movement, then movement data can be obtained, but radiation exposure occurs and soft tissue cannot be displayed
Solution Approach 1:
The patent replaces the DVT scan (mechanical/radiation-based system) with MRI (magnetic resonance imaging system) to detect temporomandibular joint movement. The MRI system uses magnetic fields and radio waves instead of ionizing radiation, eliminating radiation exposure while maintaining the ability to visualize soft tissues and calculate movement paths through marker tracking.
Solution Approach 2:
The patent changes the imaging modality parameter from DVT scan to MRI. This parameter change enables simultaneous achievement of radiation-free imaging and soft tissue visualization capability, while maintaining movement detection precision through the use of MRI-visible markers and computational analysis of marker positions across multiple measurement data sets.
2Measurement precision
If DVT scan is used to detect temporomandibular joint movement, then movement data can be obtained, but the procedure takes a large amount of time
Solution Approach 1:
The patent segments the measurement process into two distinct phases: a first measurement time interval for acquiring multiple movement data sets with markers, and a second measurement time interval for acquiring image data sets. This segmentation allows efficient use of measurement time by performing movement tracking and image acquisition in separate, optimized phases rather than simultaneously or sequentially in a single prolonged process.
Solution Approach 2:
The patent implements continuous marker position tracking across multiple measurement data sets during the first measurement time interval, maintaining continuous useful action for movement detection. The system continuously records marker positions throughout the jaw movement, eliminating gaps in data acquisition and reducing total measurement time compared to discrete, interrupted measurements.
3Loss of information
If axiography and DVT scan are combined to detect temporomandibular joint movement, then comprehensive data can be obtained, but device complexity increases
Solution Approach 1:
The patent merges the movement detection function and soft tissue visualization function into a single MRI-based system. By combining marker tracking capability with MRI imaging capability in one integrated system, the patent eliminates the need for separate axiography and DVT scan devices, reducing overall device complexity while maintaining comprehensive data acquisition.
Solution Approach 2:
The patent creates a universal MRI-based system that performs multiple functions: it tracks marker positions for movement calculation, visualizes soft tissues, and provides anatomical context. This multi-functional approach replaces the need for multiple specialized devices (axiography, DVT scan), simplifying the overall system while maintaining complete movement data acquisition.
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 radiation-free detection of temporomandibular joint movement with high temporal resolution, reducing the need for additional devices and minimizing radiation exposure while providing effective visualization of soft tissues.
Implementation Method 1
generating a plurality of magnetic resonance imaging measurement data sets of a recording volume
Data Source
AI summary
Described is a method for detecting and displaying the movement of a temporomandibular joint which connects a lower jaw and an upper jaw by magnetic resonance imaging. A marker is secured to the lower jaw, a marker movement curve is generated using magnetic resonance imaging measurement data sets during a first measurement interval, during which the lower jaw is moved relative to the upper jaw, and a point which corresponds to a first position of the lower jaw relative to the upper jaw is ascertained on the movement curve. An image data set is generated during a second measurement interval, during which the temporomandibular joint is not moved, and a first model, which represents at least one part of the upper jaw and/or a temporal bone part that comprises the temporomandibular joint socket, and a second model, which represents at least one part of the lower jaw, are ascertained therefrom. A movement curve of the second model relative to the first model is calculated and displayed using the marker movement curve.