Liquid nitrogen refrigeration magnetic resonance imaging system

Abstract

The invention discloses a liquid nitrogen refrigeration magnetic resonance imaging system. The system comprises a high-temperature superconductor main magnet capable of generating even magnetic fields in an imaging area, at least one low-temperature gradient coils capable of generating magnetic filed gradients in the imaging area, and at least one low-temperature radio frequency coil capable of receiving and transmitting radio frequency signals in the imaging area. The system comprises at least one of the following materials: non-superconducting materials and superconducting materials, wherein the non-superconducting materials and the superconducting materials have higher electrical conductivity than copper when cooled to the temperature of 77K. The main magnet, the gradient coils and the radio frequency coils of a preset system adopt low-temperature conducting materials, and the low-temperature conducting materials comprise high-temperature conducting materials, the high-temperature conducting materials are used for manufacturing coils of the main magnet, and therefore high current density can be produced in the coils, and power consumption can be saved; the high-temperature conducting main magnet is small and light and capable of operating under the temperature of 77K, and therefore refrigeration efficiency is improved greatly; and the gradients and the radio frequency coils are made of low-temperature conducting materials, resistance of the coils can be reduced, and coil efficiency can be improved.

Description

technical field [0001] The invention relates to a magnetic resonance imaging system refrigerated by liquid nitrogen, in particular to a magnetic resonance imaging system using a superconducting device. Background technique [0002] At present, magnetic resonance imaging technology has been widely used in various large medical institutions in the world and has achieved huge and unique benefits in medical practice. MRI has been developed as a well-established diagnostic tool for structural and anatomical imaging, and has also been developed for imaging functional activity and other biophysical and biochemical features and processes such as blood flow, metabolic molecules / metabolism, diffusion, some of which MRI Imaging techniques include the well-known MRI functional imaging, magnetic resonance spectroscopy imaging (MRSI), diffusion weighted imaging (DWI) and diffusion tensor imaging (DTI). These magnetic resonance imaging techniques not only have medical diagnostic value in ...

AI Technical Summary

Problems solved by technology

[0006] In addition, an important factor affecting the further use of magnetic resonance imaging technology is the high cost of purchasing and maintaining high magnetic field systems

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