Configurable MRI Tissue Phantoms for Diffusion and Perfusion Validation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current diffusion-weighted MRI (DWI) and perfusion imaging techniques lack a reliable method for verifying data quality and tissue properties, such as directionality and health, which limits their applicability and accuracy in clinical and diagnostic applications.
Innovation Solution
The development of configurable medical phantoms with anisotropic and isotropic diffusion modules, as well as perfusion modules, that can be assembled to simulate various tissue structures and diffusion patterns, allowing for the creation of 'ground-truth' data for calibration and testing of MRI devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If diffusion-weighted MRI and perfusion imaging techniques are used to measure tissue properties, then valuable diagnostic information can be obtained, but there is no reliable method to verify data quality and tissue properties
Solution Approach 1:
The patent creates physical phantom models that copy and replicate the diffusion and perfusion properties of real human tissues. These phantoms contain engineered structures with known diffusion coefficients and perfusion characteristics, allowing MRI systems to capture reference data that mirrors clinical imaging conditions without the complexity of actual biological variability. The phantoms serve as verifiable surrogates for quality assurance.
Solution Approach 2:
The patent systematically varies physical parameters within the phantom constructs, such as diffusion coefficients, perfusion rates, and tissue composition, to create a range of testable conditions. By controlling and measuring these parameters in the phantom, the system establishes ground-truth reference values that can verify the accuracy and reliability of MRI measurements across different imaging scenarios.
2Adaptability or versatility
If configurable phantoms with multiple modules are constructed to simulate various tissue structures, then validation capability is improved, but manufacturing complexity increases
Solution Approach 1:
The patent divides the phantom system into discrete, interchangeable modules including diffusion modules with different coefficients, perfusion modules with controllable flow rates, and support structures. Each module can be independently manufactured and assembled into different configurations to simulate various tissue types and pathological conditions, reducing overall manufacturing complexity while maintaining versatility.
Solution Approach 2:
The patent designs universal connector interfaces and standardized module dimensions that allow the same basic components to serve multiple functions. The support plates and mounting mechanisms can accommodate different diffusion and perfusion modules, enabling a single phantom system to validate multiple imaging protocols and tissue types without requiring separate custom-built phantoms for each application.
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
These phantoms provide a reliable means to validate MRI data quality and simulate different tissue conditions, enhancing the accuracy and reliability of diffusion-weighted and perfusion imaging techniques, and facilitating their wider clinical and diagnostic use.
Implementation Method 1
When water diffuses through tissue that has a high degree of organisation, the directions available for diffusion of water molecules are unequal and distinguishable
Implementation Method 2
DTI helps distinguish between tissue that has organized structure from those that is disorganized, or homogenous in nature
Implementation Method 3
Modalities of MR imaging can also leverage the different properties of water and fluids as they move in different ways through tissues in the body
Data Source
AI summary
Components and construction methods are described for constructing a wide variety of configurable phantoms for use in MR imaging. These phantoms generally comprise an outer housing; at least one support plate disposed within the outer housing and having a plurality of locations for selectively receiving at least one element allowing for configurable phantoms to be created; the at least one element having anisotropic diffusion, isotropic diffusion, and/or perfusion characteristics, the at least one element being releasably connected at one of the plurality of locations on the support plate; and a matrix material contained within the outer housing, the matrix material being an aqueous fluid, wherein during MR imaging, the presence of the aqueous fluid, and directionality of fluid molecular diffusion within or through the at least one element are recorded in MR images.