Adaptive radio frequency coil and coil array facilitating wearing

A technology of radio frequency coils and coil arrays, applied in the direction of measuring magnetic variables, measuring devices, instruments, etc., can solve problems such as the inability to achieve signal-to-noise ratio and image quality, patient discomfort, and lower image quality, so as to improve imaging speed or imaging quality, enhancement of wearing comfort, effect of increasing wearing comfort

Inactive Publication Date: 2018-01-16
石建国
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Affected by different ages, body shapes, and diagnostic sites of patients, in order to effectively utilize the advantages of surface radio frequency coils, it is necessary to design surface radio frequency coils of different sizes and shapes according to the needs of different patient ages, body shapes, and different diagnostic sites. ; Otherwise, because the radio frequency coil array of fixed shape and structure can't adapt to the size of all patient statures, and then can't reach optimal signal-to-noise ratio and image quality; In addition, the surface radio frequency coil array in the prior art is limited by hard casing structure, it will also bring discomfort to the patient besides the pain
[0005] Further, under high-field-strength nuclear magnetic resonance in the prior art, the mutual inductance between the coils in the array will be stronger, and the above-mentioned mutual inductance will reduce the signal-to-noise ratio of the magnetic resonance image and bring more artifacts, thereby reducing the quality of the acquired image. In addition, under high field strength NMR, the radiation loss increases with the increase of frequency, which leads to the increase of coil noise and reduces the signal-to-noise ratio of the image

Method used

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  • Adaptive radio frequency coil and coil array facilitating wearing
  • Adaptive radio frequency coil and coil array facilitating wearing
  • Adaptive radio frequency coil and coil array facilitating wearing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Please refer to figure 2 and image 3 , figure 2 The adaptive radio frequency coil provided by the present invention includes: an oscillating circuit layer 100, a dielectric layer 200 and a shielding layer 300 that are sequentially fastened and attached; image 3 for figure 2 An exploded view of the structure of the self-adaptive radio frequency coil shown, wherein the shapes of the dielectric layer 200 and the shielding layer 300 are respectively adapted to the shape of the oscillating circuit layer 100; the oscillating circuit layer 100 is provided with a coil 110;

[0043] Such as Figure 4 As shown, the coil 110 is connected in series with:

[0044] Impedance matching and amplifying module 120, described impedance matching and amplifying module 120 include: the first frequency modulation circuit 121, impedance matching circuit 122 and power amplifying circuit 123 that are arranged in parallel; Trap circuit 124 to establish connection;

[0045] A frequency m...

Embodiment 2

[0058] Such as Figure 6 As shown, on the basis of the above-mentioned embodiments, this embodiment also provides an easy-to-wear coil array, including a first wearing surface 500 and a second wearing surface 600 respectively equipped with telescopic flexibility, whose shape and structure are mirror-symmetrical; The first wearing surface and the second wearing surface are connected by local edges to form clothing; the first wearing surface 500 and the second wearing surface 600 are respectively fixed with a plurality of self-adaptive radio frequency coils Q as mentioned above; The positions of the adaptive radio frequency coil Q on the first wearing surface 500 and the adaptive radio frequency coil Q on the second wearing surface 600 in the clothing are mirror-symmetrical.

[0059] Figure 6 Among them, the first wearing surface 500 and the second wearing surface 600 can be composed of connecting pieces symmetrically cut into different clothing shapes according to needs, incl...

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Abstract

The invention provides an adaptive radio frequency coil and a coil array facilitating wearing to greatly enhance the wearing comfort, be compatible with wearing requirements of different examination positions of patients of different figures, reduce the mutual inductance effect between coils, increase the signal-to-noise ratio of a magnetic resonance image, and improve the imaging speed or the imaging quality of the magnetic resonance image. The adaptive radio frequency coil comprises an oscillation circuit layer, a dielectric layer and a shielding layer attached in sequence in a fastening manner; the coil array facilitating wearing comprises a first wearing plane and a second wearing plane which are telescoping and flexible and arranged in mirror symmetry in appearance and structure; thefirst wearing plane and the second wearing plane form clothes through connection of local edges; the first wearing plane and the second wearing plane are respectively and fixedly provided with a plurality of above adaptive radio frequency coils; and two adaptive radio frequency coils respectively located on two adjacent wearing planes and opposite to each other always maintain mutual mirror symmetry. The adaptive radio frequency coil and the coil array can be applicable to usage during nuclear magnetic resonance imaging.

Description

technical field [0001] The invention relates to the technical field of nuclear magnetic resonance medical imaging, in particular to an adaptive radio frequency coil and a wearable coil array. Background technique [0002] Magnetic Resonance Imaging (MRI) uses the characteristics of different atoms spinning at a special frequency in a static strong magnetic field to analyze physical, chemical, biological and other properties. The basic principle of medical nuclear magnetic resonance imaging is: the organism contains a large number of water molecules, and the organism is placed in a static strong magnetic field, and the hydrogen atoms in the water molecules can rotate at a unique frequency. This frequency is called Larmor frequency, Larmor frequency. The frequency is proportional to the product of the static magnetic field strength and the atomic gyromagnetic rate. By using radio frequency coils to excite these rotating atoms, hydrogen atoms release time-varying electromagnet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/341
Inventor 石建国
Owner 石建国
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