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A high-temperature superconducting shimming system applied to magnetic resonance equipment

A magnetic resonance equipment and high-temperature superconducting technology, which is applied in the manufacture/processing of superconducting devices, superconducting magnets/coils, superconducting devices, etc., can solve the inaccurate control process, the influence of turning off the magnetic field, and the insufficient on-off speed and other problems, to achieve the effect of obvious advantages, fast on-off speed, and small heat loss

Active Publication Date: 2018-05-01
HEFEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention aims to solve the problems of insufficient on-off speed, inaccurate control process, thermal influence, and shut-off magnetic field influence of the traditional superconducting magnetic resonance shimming system, and proposes a high-temperature superconducting shimming system applied to magnetic resonance equipment , in order to improve the shimming effect, improve the uniformity of the magnetic field, and at the same time reduce the amount of liquid helium used, save resources and reduce costs

Method used

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  • A high-temperature superconducting shimming system applied to magnetic resonance equipment
  • A high-temperature superconducting shimming system applied to magnetic resonance equipment
  • A high-temperature superconducting shimming system applied to magnetic resonance equipment

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Embodiment Construction

[0032] Such as figure 2 As shown, the magnetic resonance equipment is composed of a refrigerator 10, a superconducting main coil area 11, a system shell 12, a 70K cold screen 13, a 40K cold screen 14, a 20K cold screen 15, a 10K cold screen 16, a 4.2K cold screen 17, a high temperature Composed of a superconducting shimming area 21 and a cold source drainage groove 22;

[0033] In this embodiment, the cryostat is a multi-screen heat insulation structure combining multi-layer radiation protection screen and steam cooling screen. screen, thereby improving the thermal insulation effect. The cryostats are 4.2K cold screen 17, 10K cold screen 16, 20K cold screen 15, 40K cold screen 14, and 70K cold screen 13 from inside to outside.

[0034]The refrigerating machine 10 is used for cooling the cold screen of the cryostat, and is set as two-stage refrigeration, cooling the 4.2K cold screen 17 and the 70K13 cold screen respectively. The first-stage refrigeration is connected to the...

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Abstract

The invention discloses a high-temperature superconducting shimming system applied to magnetic resonance equipment, comprising: a high-temperature superconducting shimming coil, a mutual induction coil, a switch controller, a high-frequency signal generator and a bridge rectifier circuit; The AC current is input from the side of the normal temperature area, and the induced current is generated by the low temperature area side of the mutual induction coil; the induced current is rectified through the bridge rectifier circuit; inside the bridge rectifier circuit, the high frequency signal generator generates a high frequency current signal and inputs it to the switch The controller controls the on-off of the superconducting switch in the bridge rectifier circuit through the switch controller; after rectification, the induced current becomes direct current and is input into the high-temperature superconducting shim coil; when the external AC power signal is removed, the bridge rectifier circuit remains The two opposite superconducting switches are turned on, and the high-temperature superconducting shimming system is in a closed-loop operation state. The invention can enhance the shimming effect, improve the uniformity of the magnetic field, reduce the consumption of liquid helium, save resources and reduce costs.

Description

technical field [0001] The invention relates to the field of magnetic resonance, in particular to a high-temperature superconducting shimming system applied in magnetic resonance equipment. Background technique [0002] With the development of magnetic resonance imaging technology, superconducting magnetic resonance has gradually become the mainstream in the field of magnetic resonance because of its excellent stability and uniformity, and has very broad prospects in scientific research and other fields. Among them, the superconducting main magnet is the main component of superconducting magnetic resonance. The magnetic field strength and uniformity are the main indicators to measure its performance, especially the magnetic field uniformity can not only determine the performance of the magnet, but also directly affect the signal-to-noise ratio of the image. But even if the magnet design calculation is very precise, its processing error is unavoidable. In practice, the magne...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F6/00H01F6/04G01R33/3815H01L39/24
CPCH01F6/00H01F6/04G01R33/3815H10N60/0912
Inventor 徐进章窦艳徐雪原苏光靖
Owner HEFEI UNIV OF TECH
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