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Pressure monitor, superconducting magnet and MRI (Magnetic Resonance Imaging) system

A monitoring device and superconducting magnet technology, applied in magnetic resonance measurement, control/regulation system, measurement device, etc., can solve the problem of expensive, unadaptable provision of magnet pressure information, and the high cost of absolute pressure sensors. and other issues, to achieve the effect of saving costs

Inactive Publication Date: 2016-10-19
SIEMENS SHENZHEN MAGNETIC RESONANCE
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Problems solved by technology

However, due to changes in atmospheric pressure, the gauge pressure cannot adaptively provide the pressure information of the magnet
[0006] In response to the above problems, some magnets use absolute pressure sensors to obtain accurate and efficient absolute pressure data, and then use these data to keep the absolute pressure of the magnet constant, but this method is expensive due to the high cost of absolute pressure sensors

Method used

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  • Pressure monitor, superconducting magnet and MRI (Magnetic Resonance Imaging) system

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Embodiment Construction

[0020] In order to make the purpose, technical solution and advantages of the present invention clearer, the following specific examples are given to further describe the present invention in detail.

[0021] In the superconducting magnet system, the helium needs to be in a saturated state, that is to say, the pressure of the helium in the superconducting magnet needs to reach a critical value, if the absolute pressure of the helium in the superconducting magnet is greater than the critical value, the helium will Liquefied, meanwhile, the absolute pressure of helium depends on the temperature of helium.

[0022] The present invention uses a temperature sensor located in the helium tank as a control signal to control the magnet pressure. In the current magnet system, there are already some temperature sensors (for example, CCR (Carbon Crystal Resistance, carbon crystal resistance) temperature sensor) in the helium tank. Since, the accuracy of the temperature sensor to control ...

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Abstract

The invention discloses a pressure monitor, a superconducting magnet and an MRI system. The pressure monitor comprises a temperature sensing unit for sensing the helium temperature of the superconducting magnet and providing representative data, a determining unit for comparing the representative data with a threshold and obtaining a determination result, and a control unit for controlling a refrigeration part of the superconducting magnet according to the determination result, wherein the determining unit is electrically connected with the temperature sensing unit and the control unit. The pressure monitoring monitor of the superconducting magnet can control the pressure of the superconducting magnet accurately and greatly reduces the cost of an absolute pressure sensor.

Description

technical field [0001] The invention relates to the technical field of magnetic resonance imaging, in particular to a pressure monitoring device for a superconducting magnet of a magnetic resonance imaging system. Background technique [0002] Magnetic resonance imaging (Magnetic Resonance Imaging, MRI) is a technique that uses magnetic resonance phenomena for imaging. The principle of magnetic resonance phenomenon mainly includes: atomic nuclei containing a single number of protons, such as hydrogen nuclei widely present in the human body, the protons have spin motion, just like a small magnet, and the spin axis of these small magnets has no certain rules. External magnetic field, these small magnets will be rearranged according to the magnetic force lines of the external magnetic field, specifically in two directions parallel to or antiparallel to the magnetic force lines of the external magnetic field, and the above-mentioned direction parallel to the magnetic force lines...

Claims

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Application Information

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IPC IPC(8): G01L5/00G01R33/28
Inventor 赖碧翚方志春杨磊
Owner SIEMENS SHENZHEN MAGNETIC RESONANCE
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