Magnetic signal enhancing device for low-field nuclear magnetic resonance imaging instrument and making method thereof

Abstract

The invention relates to a magnetic signal enhancing device for a low-field nuclear magnetic resonance imaging instrument and a making method thereof and solves the problem that low-field magnetic resonance imaging equipment is low in image signal-to-noise ratio and space resolution rate when compared with the prior art. An artificial electromagnetic structure resonance unit comprises a metal square spiral line etched on the upper surface of a substrate, a metalized via hole is formed in each of two ends of the metal square spiral line and penetrates the substrate, a metal microstrip line is printed on the lower surface of the substrate and connected with the metalized via holes, and a non-magnetic patch capacitor is welded on the metal microstrip line. The artificial electromagnetic structure resonance unit formed by connecting the metal square spiral line on the front of the substrate with a microstrip loaded with the non-magnetic patch capacitor on the back of the substrate throughthe metalized via hole has negative magnetic conductivity at low-field magnetic resonance Larmor precession frequency, and the artificial electromagnetic structure resonance unit can effectively enhance magnetic resonance radio frequency field magnetic signals by utilizing the negative magnetic conductivity.

Description

technical field [0001] The invention relates to the technical field of low-field nuclear magnetic resonance imaging, in particular to a magnetic signal enhancement device for low-field nuclear magnetic resonance imaging equipment and a manufacturing method thereof. Background technique [0002] As a new medical imaging method, magnetic resonance imaging technology has great advantages in clinical medicine and disease diagnosis, especially in the application of functional degenerative diseases such as Alzheimer's disease and Parkinson's disease. The basic principle of magnetic resonance imaging is to place the human body in a specially coded strong magnetic field, and use radio frequency pulses to excite the human hydrogen nuclei, so that the human hydrogen nuclei (1H) absorb and store energy. When the radio frequency pulse is stopped, the human hydrogen nucleus (1H) releases the radio frequency signal according to the specific excitation frequency, and releases the stored en...

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Problems solved by technology

[0008] The purpose of the present invention is to solve the defects of low image signal-to-noise ratio and low spatial resolution of low-field magnetic resonance imaging equipment in the prior art, and provide a magnetic signal enhancement device for low-field nuclear magnetic resonance imaging equipment and its manufacturing method to solve the above problems

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