Imaging Phantom Coil Nesting for Signal Quality
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Solution Overview
Problem
Existing imaging technologies face challenges in achieving high-resolution and high signal-to-noise ratio geometric distortion correction in MRI devices due to limitations in the design and manufacturing of magnetic field inhomogeneity and gradient nonlinearity, which result in poor signal quality in the central region of imaging phantoms.
Innovation Solution
The proposed solution involves an imaging phantom assembly that includes a phantom body with one or more coils arranged within it, allowing for improved signal quality and accuracy by reducing the maximum distance between the coil and various parts of the phantom body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a radio frequency receiving coil covers the phantom from the outside, then the phantom can be imaged, but the signal quality in the central region of the phantom deteriorates due to large distance between coil and phantom center
Solution Approach 1:
The patent embeds the radio frequency receiving coil inside the phantom body, creating a nested structure where the coil is positioned within the phantom's internal cavity. This nesting arrangement dramatically reduces the distance between the coil and the phantom center, thereby improving signal quality in the central region while maintaining the ability to image the entire phantom structure.
2Area of stationary object
If the phantom volume is increased to cover large-sized imaging space, then geometric distortion correction can be applied to larger areas, but the signal-to-noise ratio deteriorates due to increased distance from the coil
Solution Approach 1:
By nesting the coil within the phantom, the patent enables the use of larger phantom volumes to cover extensive imaging spaces while maintaining close proximity between the coil and all regions of the phantom. This nested configuration ensures that even in large phantoms, the signal-to-noise ratio remains high because the coil is internally positioned rather than externally placed.
Solution Approach 2:
The patent transitions from a two-dimensional external coating arrangement to a three-dimensional internal embedding arrangement. By moving the coil from the external surface to the internal cavity, the system achieves better signal quality throughout the volumetric phantom, effectively utilizing spatial dimensionality to resolve the contradiction between phantom size and signal quality.
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
This configuration enables geometric distortion correction imaging with high resolution and high signal-to-noise ratio, effectively addressing the limitations of existing technologies by enhancing the quality and accuracy of the magnetic resonance signals acquired.
Implementation Method 1
acquiring a magnetic resonance signal of an imaging phantom assembly under a radio frequency signal
Data Source
AI summary
An imaging phantom assembly includes a phantom body and one or more coils. At least one part of at least one of the one or more coils is arranged in the phantom body.