Phantom Calibration Body for Quantitative MRI Diffusion Parameter Standardization
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Solution Overview
Problem
Current methods for calibrating MRI devices for quantitative diffusion imaging are not tissue-specific, leading to variations in extracted parameters due to factors like temperature, MRI device differences, and software variations, which limits the comparability of diffusion MRI data across different measurements and vendors.
Innovation Solution
A phantom calibration body with two compartments filled with calibration substances at different concentrations, designed to mimic benign and malignant tissues, is used in conjunction with a computer-implemented method to extract quantitative diffusion parameters, allowing for standardization and quality control of diffusion MRI data, independent of tissue temperature and MRI device variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a phantom calibration body with multiple compartments and concentrations is used, then measurement precision and data comparability are improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The phantom calibration body is divided into multiple compartments (first compartment with first concentration, second compartment with second concentration), each serving as an independent calibration reference. This segmentation allows simultaneous calibration across different diffusion parameter ranges, improving measurement precision while maintaining manageable complexity through modular design
Solution Approach 2:
Each compartment contains a calibration substance with a specific concentration tailored to represent different tissue types (e.g., benign vs. malignant). The first compartment has a first concentration optimized for one tissue type, while the second compartment has a second concentration for another tissue type, providing locally optimized calibration for different measurement scenarios
2Adaptability or versatility
If calibration substances with different concentrations are used to mimic different tissues, then adaptability to various tissue types is improved, but manufacturing precision requirements increase
Solution Approach 1:
The calibration substances are prepared with different concentrations (first concentration in first compartment, second concentration in second compartment) to represent different tissue diffusion properties. This parameter variation enables the phantom to adapt to multiple tissue types including benign and malignant tissues, while the concentrated calibration substances provide stable, reproducible reference values that reduce manufacturing variability
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
The solution enables precise and accurate extraction of quantitative diffusion parameters, ensuring consistent data across different measurements and vendors, facilitating reliable clinical diagnostics and intra-individual comparisons.
Implementation Method 1
a first compartment having a first cross-section, the first compartment being filled with a first solution comprising a calibration substance having a first concentration; and a second compartment having a second cross-section, the second cross-section having at least two different partitions with differing diameters, wherein the second compartment is filled with a second solution comprising the calibration substance having a second concentration
Data Source
AI summary
A phantom calibration body (110) for a method for determining at least one quantitative diffusion parameter extracted for characterization of a tissue being suspicious to a tumorous modification in magnetic resonance imaging is disclosed, wherein the phantom calibration body (110) is designed for being characterized during characterization of the tissue by the magnetic resonance imaging. Herein, the phantom calibration body (110) comprises a first compartment (112) having a first cross-section, the first compartment (112) being filled with a first solution comprising a calibration substance having a first concentration; and a second compartment (114) having a second cross-section, the second cross-section having at least two different partitions with differing diameters, wherein the second compartment (114) is filled with a second solution comprising the calibration substance having a second concentration, the second concentration differing from the first concentration. The present invention allows determining absolute quantitative parameters in an individualized fashion for each individual tissue independent from various times of recording, applied software algorithms for post-processing of the raw MRI data, MR devices, or MR vendors. The present invention, thus, allows using the absolute quantitative data extracted from the phantom calibration body (110) measured with every tissue for comparability of quantitative data, being a prerequisite for introducing quantitative diffusion weighted imaging (DWI) into clinical routine.