Breast radio-frequency coil device for the horizontal magnetic resonance imaging

Abstract

The invention relates to a breast radio frequency coil device, especially relates to a level field four-coil radio frequency coil device. The invention provides a breast radio frequency coil device, including a supporting case, having a bottom surface and a skin covering, wherein the bottom surface has two convex spheres which are eudipleural, and the skin covering is covered on the sphere; and two coils arranged inside the supporting case, wherein each group of coil has an annular coil and a splay coil, and the annular coil is covered on the sphere, while the splay coil is turned over in opposite direction using the crossing as the peak to form a coil with the saddle shape. The coil with the saddle shape is covered on the sphere, having the bottom churned up outwards, to form a raised edge, wherein the raised edge is adhibited on the bottom surface. The invention has the advantages of good uniformity, high SNR and high detection sensitivity etc.

Description

technical field [0001] The invention relates to a breast radio frequency coil device used in a magnetic resonance imaging system, in particular to a breast radio frequency coil device with four horizontal field coils. Background technique [0002] Magnetic resonance imaging (MRI) is another major advancement in medical imaging diagnosis technology after CT. Its basic principle comes from the discovery of American scholars Bloch and Purcell in 1946. Under the action of an external magnetic field, some protons (including hydrogen protons in the human body) that precess around the main magnetic field (external magnetic field) undergo a brief radio frequency Under the action of radio waves, the precession angle increases. When the radio frequency radio waves stop, those protons will gradually return to their original state, and at the same time release radio frequency signals with the same frequency as the excitation wave. This physical phenomenon is called nuclear magnetic reso...

AI Technical Summary

Problems solved by technology

[0005] The magnetic resonance breast coil used in the existing magnetic resonance imager is usually designed as four loop coils, that is, two larger loop coils close to the lower edge of the human breast and two smaller loop coils close to the nipple. This causes the problem mentioned above that the image is not uniform due to the higher sensitivity of the smaller toroid and the lower sensitivity of the larger toroid; at the same time, since the large and small toroids will produce mutual inductance, which reduces the signal-to-noise ratio of the image

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