Gradient coil and gradient coil manufacturing method
A gradient coil and manufacturing method technology, applied in the direction of measuring magnetic variables, measuring devices, instruments, etc., can solve the problems of limited copper wire turn density, heat generation, and limiting the performance of gradient coils, and achieve high gradient linearity, meet demand, and magnetic Resonant scanning images are clear and accurate
Active Publication Date: 2020-08-07
联影(常州)医疗科技有限公司
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Problems solved by technology
Due to the limitation of coil size, the number of copper wires that can be arranged in this limited area is certain, so that the turn density of copper wires is limited, which limits the improvement of the performance of gradient coils
In addition, limited by cost and technical conditions, the maximum gradient strength of currently available gradient coils is about 100mT / m, and the maximum climb rate is about 200T / m / s
With this structure, if you want to further improve the performance, you will encounter serious heating problems, resulting in a decrease in coil availability
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[0043] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only the technical solutions of the present invention. Some, but not all, embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.
[0044] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated ; It can be a mechanical connection or an electrical connection; it can be a direct...
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Abstract
The invention belongs to the technical field of magnetic resonance imaging and application, and discloses a gradient coil and a gradient coil manufacturing method. The gradient coil comprises a main gradient coil and a shielding gradient coil which are connected with each other, each layer of coil in the main gradient coil and the shielding gradient coil is formed by winding a conductor, and at least one layer of coil in the main gradient coil and the shielding gradient coil is of a double-layer conductor structure. According to the double-layer conductor structure for the gradient coil, the generated gradient fields are coupled and superposed, so that the gradient intensity is 1.5-2 times higher than that of a single-layer coil under the condition of the same current, and the gradient coil can be used for some advanced sequence applications of magnetic resonance imaging. Besides, more coil design freedom degrees can be provided, through an optimized design algorithm, the double-layerconductor structure distribution can more accurately approach the ideal gradient current distribution, a more accurate gradient magnetic field can be generated, the higher gradient linearity can be achieved, and therefore a magnetic resonance scanning image is clearer and more accurate.
Description
technical field [0001] The invention relates to the technical field of magnetic resonance imaging and its application, in particular to a gradient coil and a method for manufacturing the gradient coil. Background technique [0002] Scientific research in the field of magnetic resonance imaging and its applications places ever-increasing demands on gradient performance. In the magnetic resonance system, the traditional gradient coils include three sets of main gradient coils GX, GY, GZ and three sets of shielded gradient coils SX, SY, SZ, and the gradient power amplifier drives the three sets of main gradient coils GX, GY, GZ to generate X The gradient magnetic fields in the three directions of X, Y and Z are used to meet the imaging requirements of the magnetic resonance system. Three groups of shielded gradient coils SX, SY and SZ are shielded gradient coils in the three directions of X, Y and Z respectively. Among them, the X and Y coils are fingerprint coils, and the Z c...
Claims
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IPC IPC(8): G01R33/385
CPCG01R33/3858
Inventor 刘曙光王利锋晏焕华
Owner 联影(常州)医疗科技有限公司
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