A new mri body phased array coil

Abstract

The invention provides a novel MRI body phased array coil. The novel MRI body phased array coil comprises a receiving coil array and a negative-permeability metamaterial plate, the negative-permeability metamaterial plate is embedded in the receiving coil array, and is as big as the receiving coil array, the negative-permeability metamaterial plate comprises a substrate and a plurality of artificial microstructures, and the artificial microstructures are periodically arrayed on the substrate. The specially designed negative-permeability metamaterial plate can enhance the capability of the MRI body phased array coil in feeding back the magnetic signals of MRI equipment, and thereby the imaging quality of the MRI body phased array coil is increased.

Description

technical field [0001] The invention relates to the field of MRI medical imaging, in particular to a novel MRI body phased array coil. Background technique [0002] The principle of the nuclear magnetic resonance (MRI) imaging system is to use a coil to detect the radio wave pulse energy absorbed and emitted by the spin of the atomic nucleus. The coil acts as a receiving coil and sometimes as a transmitting coil. With the help of pulses of energy from radio waves, an MRI scanner can locate a very small spot in a patient and then determine what type of tissue it is. The MRI machine uses pulses of radio frequency specific to hydrogen atoms. The system directs the pulses at the area of ​​the body to be examined and causes the protons in that area to absorb the energy needed to cause them to rotate, or precess, in a different direction. This is the "resonance" part of the MRI unit. Pulses of radio frequency force them (meaning the extra pair or pairs of mismatched protons per...

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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