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Although the NMR equipment of high-field superconducting magnets with a magnetic field strength greater than 1.5T still dominates the market, this type of high-field NMR equipment usually requires higher installation and maintenance conditions. Кроме того, due to its inherent high-energy and large-volume operation characteristics, there will also be some restrictions on use.
В отличие, low-field NMR instruments often have certain advantages in these aspects.
Lower cost of setup and operation
Usually the purchase price of these nuclear magnetic resonance equipment, such as nuclear magnetic resonance spectrometer (Ядерный магнитный резонанс, NMR also known as nuclear magnetic resonance spectrometer), or magnetic resonance imaging equipment (Магнитно-резонансная томография, МРТ, also known as nuclear magnetic resonance imaging), will vary with It increases with the intensity of the magnetic field, and it is not linear. Наоборот, low-field NMR equipment uses relatively low-priced permanent magnets, usually only half the price of a 1.5T superconducting unit.
From the perspective of maintenance and operation after the equipment is purchased, the low-field nuclear magnetic resonance equipment adopts a permanent magnet design and does not need to use liquid helium to cool during operation. The maintenance is also easy. General on-site operators can perform basic maintenance. jobs. Кроме того, it is relatively easy to send the instrument for repair.
Open design
Low-field NMR equipment using permanent magnets will be much smaller than high-field equipment in terms of space requirements. It is also easier to design an open architecture with a wider aperture to maximize the convenience of sample placement or increase The patient’s comfort during the test.
Less impact on surroundings
Compared with high-field nuclear magnetic resonance equipment, low-field nuclear magnetic resonance equipment can reduce the influence of magnetic field on the sample or patient. В то же время, its interference with other peripheral equipment is also greatly reduced, such as anesthesia or monitoring equipment can be closer to the low-field NMR equipment.
For biological samples or patients, low-field MRI equipment, the energy accumulated in the tissue is much smaller than that of high-field MRI equipment, because the energy accumulated in the tissue is proportional to the square of the magnetic field strength. For children and the elderly who are weak in regulating their body temperature, low-field magnetic resonance imaging equipment will have more advantages.
Reduce movement artifacts
Motion Artifacts are usually not obvious on low-field MRI equipment. Especially for those patients with metal parts in their bodies, low-field magnetic resonance imaging equipment can reduce the spatial distortion and signal attenuation caused by sensing.
