Method for fabricating gradient coil of superconducting magnetic resonance imaging device

Abstract

The invention relates to a method for fabricating a gradient coil of a superconducting magnetic resonance imaging device, which comprises the following steps of: (1) cutting a fingerprint-shaped coil from a copper plate by a cutter; (2) taking the coil from the copper plate, washing and air-drying the coil; (3) spraying a resin on the coil surface; and (4) cementing the coil sprayed with the resin to an epoxy plate and pressing the epoxy plate so that the coil is fixedly shaped with the epoxy plate, wherein the coefficient of heat conductivity of the resin is 1W / (m.K). The invention has the beneficial effects that compared with that the traditional coil is manually wound by a copper stranded wire and a flat type copper wire, the fingerprint coil is processed by a water knife cutting machine, the winding precision is more accurate with less error, and thus the field uniformity difference of the fingerprint coil can be correspondingly reduced; meanwhile, under the restriction of the same radial space size, the copper plate cutting method can realize the maximum carrier cross section, thereby increasing the gradient field density, and reducing the strict requirement on the gradient coil cooling in the late period greatly.

Description

technical field [0001] The invention relates to a magnetic resonance imaging system, in particular to a method for manufacturing a gradient coil used in a superconducting magnetic resonance imaging system. Background technique [0002] Magnetic resonance imaging is an emerging discipline in the field of applied science and a new imaging method in the field of medical imaging. It uses specific radio frequency pulses to excite the magnetic nuclei (hydrogen nuclei) of the imaging object in the main magnetic field to generate resonance. The signal is spatially encoded through the gradient magnetic field. After the resonance signal is collected, the image is reconstructed by a computer. The polarization of the radio frequency field, the excitation of the sample by the radio frequency field and the precise positioning of the imaging position by the gradient field, the signal measured during the magnetic resonance imaging process comes from the resonance between the frequency pulse...

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Problems solved by technology

[0005] In order to overcome the limitations of the existing gradient coil manufacturing method for superconducting magnetic resonance imaging devices on the further improvement of the gradient field strength and the strict requirements for the cooling of the gradient coils in the later stage, the present invention provides a brand new superconducting magnetic resonance imaging Method for making gradient coil for device

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