Method and device for reducing magnetic susceptibility artifacts of roots of necks

Abstract

The invention relates to a method and a device for reducing magnetic susceptibility artifacts of roots of necks. The problem of magnetic susceptibility artifacts in fat suppression images in magnetic resonance examination on existing roots of necks can be effectively solved by the aid of the method. The device comprises at least one filling unit (100_1-100_n). The filling units (100_1-100_n) comprise filling materials (101) and sealing bags (102), calcium carbonate powder, saturated fatty acid and table salt are mixed with one another to obtain the filling materials (101), the sealing bags (102) are filled with the filling materials (101), and the filling materials (101) can be sealed by the aid of the sealing bags (102); the multiple filling units (100_1-100_n) are serially connected with one another and are used with one another. The method and the device have the advantages that the device can be used for compensating for magnetic susceptibility difference between tissues of the roots of the necks, accordingly, the uniformity of magnetic fields of shoulders can be improved, the magnetic susceptibility difference of the shoulders can be reduced, and the purpose of reducing or eliminating the magnetic susceptibility artifacts can be achieved.

Description

technical field [0001] The invention relates to the technical field of magnetic resonance examination, in particular to a method and a device capable of reducing artifacts of the magnetic susceptibility of cervical root tissue. Background technique [0002] Magnetic resonance imaging technology is a commonly used technology in medical examination, and it is also a revolutionary technology in medical imaging. In modern hospitals, magnetic resonance imaging technology is more and more widely used. [0003] Magnetic resonance imaging (magnetic resonance imaging, MRI) uses radio frequency (radio frequency, RF) electromagnetic waves to excite substances containing nuclei with non-zero spins in a magnetic field, and magnetic resonance (nuclearmagnetic resonance, NMR) occurs. A digital image is established by collecting magnetic resonance signals by induction coils and processing them according to certain mathematical methods. Magnetic resonance imaging (MRI) technology is a new i...

AI Technical Summary

Problems solved by technology

However, when performing axial fat suppression at the root of the neck, due to the particularity of the neck geometry, the radio frequency field B1 at the root of the neck is uneven, the resonance frequency changes, and fat suppression often fails, resulting in the soft tissue at the root of the neck appearing in the fat-suppressed image. The frequency of water and fat is miscalculated, the image turns black, and the signal is lost. At the same time, because there is a large amount of air in the alveoli and the surface of the neck and shoulders, the magnetic susceptibility of the air-soft tissue interface in the root of the neck is quite different, and the fat-suppressed image tends to appear obvious. The magnetic susceptibility artifacts in the fat-suppressed images affect the correct diagnosis of the disease; however, the old MRI machines have not yet solved the problem of magnetic susceptibility artifacts in fat-suppressed images.

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