Fluorinated Polymer Scaffold for 19F MRI Contrast
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Solution Overview
Problem
Current tissue engineering scaffolds are difficult to visualize and monitor using clinical imaging techniques due to their similarity in structure and material to surrounding tissues, lacking sufficient contrast for effective imaging during degradation processes.
Innovation Solution
The use of fluorinated polymers as contrast agents in 19F magnetic resonance imaging (MRI) for visualizing and monitoring the degradation of tissue engineering scaffolds, which provides adequate mobility and visibility due to their fluorine content and biocompatibility, allowing for quantitative in vivo monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If natural or polymeric scaffolds are used for tissue engineering, then biocompatibility and structural support are provided, but imaging contrast is insufficient compared to surrounding tissues
Solution Approach 1:
The patent applies local quality by incorporating fluorinated polymer segments specifically at locations where imaging contrast is needed, while maintaining natural or synthetic polymer structures elsewhere for biocompatibility and structural support. The fluorinated segments are integrated into the scaffold matrix to provide localized contrast enhancement without compromising overall scaffold functionality.
Solution Approach 2:
The patent uses composite materials by combining fluorinated polymer segments with natural or synthetic polymer matrices. This creates a hybrid scaffold material that exhibits both the biocompatibility of natural/synthetic polymers and the imaging contrast properties of fluorinated compounds, allowing simultaneous achievement of multiple desired properties.
2Difficulty of detecting and measuring
If fluorinated polymers are incorporated as contrast agents, then imaging visibility is enhanced, but structural integrity and mechanical properties may be compromised
Solution Approach 1:
The fluorinated polymer is incorporated as segmented regions within the scaffold matrix rather than as a continuous phase. This localized incorporation provides sufficient imaging contrast while maintaining the structural integrity provided by the dominant natural or synthetic polymer matrix.
Solution Approach 2:
The patent optimizes the concentration and distribution parameters of fluorinated polymer segments within the scaffold. By controlling the amount and spatial arrangement of fluorinated segments, adequate imaging contrast is achieved while maintaining mechanical properties within acceptable ranges for tissue engineering applications.
3Duration of action of stationary object
If scaffolds are designed to degrade in vivo, then tissue remodelling is promoted, but monitoring degradation progress is difficult due to lack of contrast
Solution Approach 1:
The patent uses fluorinated polymer segments that produce distinct MRI signal characteristics, analogous to color changes in visual detection. The fluorinated segments provide a detectable signal that changes as degradation progresses, enabling monitoring of the degradation process through temporal changes in imaging contrast.
Solution Approach 2:
The fluorinated contrast agent provides continuous feedback on scaffold degradation status through MRI imaging. By monitoring the changing signal intensity and distribution of fluorinated segments over time, the degradation progress can be quantified, providing feedback on the remodelling process and allowing assessment of tissue regeneration status.
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 clear visualization and quantitative monitoring of scaffold degradation using 19F MRI, providing enhanced imaging contrast and safety due to the biocompatibility and mobility of fluorinated polymers, facilitating the assessment of tissue engineering procedures.
Implementation Method 1
19F magnetic resonance imaging (MRI) for visualizing and monitoring the degradation of tissue engineering scaffolds
Data Source
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AI summary
The present invention relates to the use of a fluorinated polymer having a glass transition temperature (Tg), preferably as determined by differential scanning calorimetry, below 40 °C as a contrast agent in 19F magnetic resonance imaging (MRl) of a solid object, said solid object comprising said contrast agent. Moreover, the invention relates to a solid object, preferably a scaffold suitable for tissue engineering, comprising a structural component and an imaging component, wherein the imaging component is at least one fluorinated polymer. In addition, the invention relates to a method for 19F magnetic resonance imaging (MRl) in solid state using a contrast agent comprising a fluorinated polymer as well as a method for in vivo visualizing a scaffold, comprising the steps of: providing a solid object, surgically inserting said solid object in a mammalian body; and visualizing said solid object, using 19F magnetic resonance imaging (MRI). Moreover, the invention relates to a method for in vivo monitoring the degradation of a solid object in time, wherein the degradation is monitored in time by using 19F magnetic resonance imaging (MRl) to visualize the solid object, and wherein the amount of degradation of the solid object is determined based on the decrease in the visibility of the amount of 19F.