Fusion Phantom for MRI CT Metallic Artifact Correction
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Solution Overview
Problem
Existing quality assurance phantoms for MRI and CT systems are limited in their ability to correct artifacts, particularly metallic artifacts caused by dental prostheses, leading to inaccurate image reconstruction and treatment plans.
Innovation Solution
A fusion phantom with two hemispheric containers filled with brain metabolite solutions and featuring teeth and dental implant inserts made of titanium, allowing for simultaneous evaluation of MRI and CT systems, correction of metallic artifacts, and quantitative metabolite analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate phantoms are used for MRI and CT quality assurance, then each imaging system can be evaluated independently, but the evaluation process becomes time-consuming and inefficient
Solution Approach 1:
The patent combines MRI and CT quality assurance evaluation into a single integrated phantom that can be used for both imaging modalities. The phantom contains multiple inserts with different materials and geometries that allow simultaneous assessment of both MRI and CT system performance, eliminating the need for separate evaluation processes and reducing total testing time while maintaining comprehensive evaluation coverage
2Adaptability or versatility
If traditional phantoms are used without metallic artifacts, then the phantom structure remains simple, but the ability to evaluate and correct metallic artifacts is lost
Solution Approach 1:
The patent incorporates specific metallic artifact inserts at localized positions within the phantom structure. These inserts include titanium and other metallic materials with predetermined geometries that generate controlled metallic artifacts. By placing these artifacts in specific locations and using specific materials, the phantom can evaluate metallic artifact correction capabilities without requiring complete redesign of the entire phantom structure
Solution Approach 2:
The phantom replicates realistic metallic artifact conditions by incorporating inserts that mimic dental prostheses and other metallic implants. These copied artifact sources allow evaluation of artifact correction algorithms under conditions that closely resemble actual clinical scenarios, improving the versatility of the quality assurance process
3Productivity
If a single phantom is designed to evaluate both MRI and CT, then evaluation efficiency improves, but the complexity of designing a phantom that satisfies both imaging modalities increases
Solution Approach 1:
The patent designs a universal phantom structure that serves multiple functions for both MRI and CT evaluation. The phantom includes inserts made from materials with different physical properties (titanium, polymers, liquids) that can be evaluated by both imaging modalities. The hemispheric container design with multiple inserts allows simultaneous assessment of geometric accuracy, material characterization, and artifact correction for both MRI and CT systems, achieving multi-functionality while maintaining a relatively simple overall structure
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 accurate correction of metallic artifacts and improved image quality by mimicking patient conditions with dental prostheses, allowing for precise evaluation and correction of artifacts, enhancing the reliability of MRI and CT system performance.
Implementation Method 1
uses a nuclear magnetic resonance principle. That is, when a magnetic resonance imaging device, which generates a magnetic field, is put into a human body, and high frequency waves are generated, hydrogen atoms in the body resonate
Implementation Method 2
An imaging system using X-rays may obtain only information about cross sections of the human body
Data Source
AI summary
The present invention relates to a phantom for quality assurance of magnetic resonance imaging (MRI) and computed tomography (CT) for multi-artifact correction. An aspect of the present invention provides a phantom capable of simultaneously evaluating performance of magnetic resonance imaging (MRI) and computed tomography (CT), the phantom including: a first hemispheric container; and a second hemispheric container which has the same structure and the same size as the first container, in which the first container and the second container are connected by being in direct contact with each other so as to form a symmetrical structure, each of the first container and the second container includes a teeth retainer into which a plurality of teeth mimics, which mimics teeth of a body, is inserted, and an insertion hole into which at least one bone mimic is inserted, and an interior of each of the first container and the second container is filled with at least one solution that mimics a brain metabolite.