Metamaterial and MRI (magnetic resonance imaging) magnetic signal enhancer

Abstract

The invention provides a metamaterial, which comprises a plurality of metamaterial units arranged in an array way. The metamaterial units consist of baseplates and artificial microstructures attached on the baseplates; the artificial microstructures are two split resonant ring structures; splits of the two split resonant ring structures are over against each other; each split resonant ring structure comprises a single split resonant ring and two spiral lines spirally extending out respectively towards the interior of the ring from two tail end points of the single split resonant ring, wherein the two spiral lines do not intersect with each other, and further, both do not intersect with the single split resonant ring; and the spiral lines are square spiral lines or the derived structures of the square spiral lines. The metamaterial has high negative magnetic permeability; based on the metamaterial with the high negative magnetic permeability, the invention also provides an MRI (magnetic resonance imaging) magnetic signal enhancer; and by using the MRI magnetic signal enhancer, the effect that a magnetic signal is enhanced by utilizing the characteristic that the magnetic permeability of the metamaterial with the negative magnetic permeability is negative.

Description

technical field [0001] The invention relates to the technical field of MRI imaging, in particular to a magnetic signal enhancement device for MRI imaging. Background technique [0002] At present, there have been a lot of research on magnetic permeability in the international community, among which the research on positive magnetic permeability has become mature, and the research on negative magnetic permeability metamaterials is now a hot research topic at home and abroad. Negative magnetic permeability has Quantum polarization can polarize incident waves, so it has a wide range of effects, such as magnetic resonance imaging in the field of medical imaging. Negative magnetic permeability materials can enhance the imaging effect of electromagnetic waves. In addition, negative magnetic permeability materials It also plays an important role in lens research. In the field of engineering, magnetic permeability usually refers to relative magnetic permeability, which is the absolu...

AI Technical Summary

Problems solved by technology

At present, the geometric shape of the existing metal artificial microstructure is "I" shape or such as figure 1 The opening ring similar to the "concave" shape is shown, but this structure cannot achieve a magnetic permeability μ that is significantly less than 0 or reduce the resonant frequency of the metamaterial, nor can it achieve isotropy. Only by designing a metal with a special geometry The microstructure can make the artificial electromagnetic material achieve a magnetic permeability μ value less than 0 in a specific frequency band and have a lower resonance frequency

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