Medical magnetic resonance imager monohedral magnet device

Abstract

The invention relates to a medical magnetic resonance imager monohedral magnet device, belonging to the technical field of medical instruments. The invention comprises a main monohedral magnet, a first gradient coil, a second gradient coil, an imaging zone and a bracket, wherein, the main monohedral magnet comprises a first main magnetic pole, a second main magnetic pole, a first adjusting magnetic pole, a second adjusting magnetic pole, a first pole surface, a second pole surface and a base. The invention has the following advantages: the main monohedral magnet forms an even lamelliform magnetic field imaging zone on the outer side of the magnet; a first monoplane gradient coil and a second monoplane gradient coil provide a gradient magnetic field with favourable degree of linearity in the imaging zone so as to realize phase encoding and frequency encoding of images; by revising the incline angle of a polar surface and adjusting magnetic pole interval, an even amelliform magnetic field can be precisely built. Compared with the traditional magnetic resonance imager magnet device, the device of the invention has the advantages of small volume, light weight and good openness, and greatly lowers the cost of the magnetic resonance imager.

Description

technical field [0001] The invention belongs to the technical field of medical devices, in particular to a single-sided magnet device for a medical magnetic resonance imager. Background technique [0002] Conventional magnetic resonance imaging device, referred to as MRI, the design of its main magnet is to build a spherical and uniform static magnetic field area in the space surrounded by the main magnet. Such magnets are usually bulky, heavy, poor in openness, and expensive. expensive. In the Chinese patent CN 137100A, a fully open unilateral magnet magnetic resonance imager is proposed. The main magnet of the device is a permanent magnet type, which does not require operating power and is maintenance-free. However, research on the structural form of the main magnet and gradient coils It is still in its infancy and needs to be further improved. [0003] In the Chinese patent CN 200410050357.7, a permanent magnet type open main magnet structure is proposed, which adopts a...

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Problems solved by technology

[0003] In the Chinese patent CN 200410050357.7, a permanent magnet type open main magnet structure is proposed, which adopts a combination of several magnetic blocks and iron yokes to form the sheet-shaped uniform magnetic field required by the above-mentioned magnetic resonance imager. The main magnet is light in weight, but The imaging area is still surrounded by the middle part of the pole face of the magnet, rather than the outside of the magnet, and a fully open single-sided MRI system has not been realized

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