Magnetic body thermostatic control device and method for permanent-magnet magnetic resonance imaging systems

A magnetic resonance imaging and constant temperature control technology, applied in temperature control, magnetic resonance measurement, non-electrical variable control, etc. effect, reduce overshoot, improve image quality
CN100490739CInactive Publication Date: 2009-05-27NEUSOFT MEDICAL SYST CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NEUSOFT MEDICAL SYST CO LTD
Publication Date
2009-05-27
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a permanent magnetism magnetic resonance imaging system magnet thermostatic control device. It includes alternating current temperature control circuit, the signal input end of temperature controller is linked with temperature sensor, and the regulating output end of temperature controller is linked into the alternating current power supply circuit of alternating current heater through the alternating current performer; and includes the direct current temperature control circuit consists of temperature sensor, temperature controller, direct current source and direct current heater. Among them, said regulating output end of temperature controller is linked into the direct current power supply circuit of direct current heater through the direct current performer, the alarm output end of temperature controller is linked into the alternating current power supply circuit of alternating current heater through the alternating current performer; the signal output end of temperature sensor, direct current heater and the power receiving terminal of alternating current heater are equipped with filter respectively; said temperature controller stores temperature control programs. The invention improves the thermal stability of permanent magnet, and has high control accuracy and ratio of performance to price.
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Description

technical field

[0001] The invention relates to a large-scale medical imaging equipment, in particular to a permanent magnet magnetic resonance imaging system magnet constant temperature control device and method. Background technique

[0002] Magnetic resonance imaging (MRI, Magnetic Resonance Imaging) is a high-tech imaging based on the performance characteristics of biological magnetic nuclei (hydrogen nuclei) in a magnetic field. It is widely used in the field of clinical medical imaging. It is currently the most advanced and One of the most expensive diagnostic equipment.

[0003] The permanent magnet magnetic resonance imaging system is composed of a permanent magnet subsystem, a gradient subsystem, a radio frequency subsystem, a computer and an image processing subsystem, etc. Among them, the permanent magnet is the key component of the magnetic resonance imaging system, and its performance directly It is related to the signal-to-noise ratio of the system, and thus d...

Claims

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