Gradient coil using composite cooling water pipe

Abstract

The invention discloses a gradient coil using a composite cooling water pipe. The gradient coil using the composite cooling water pipe comprises a gradient coil main body, wherein the coil main body is sequentially composed of a radio frequency shielding layer, a main coil part, a main water pipe, a uniform field space, a shielding water pipe and a shielding coil part from inside to outside; the main coil part is composed of an X coil, a Y coil and a Z coil in a stacking manner from inside to outside, the shielding coil part is composed of a Z shielding coil, an X shielding coil and a Y shielding coil in the stacking manner from inside to outside, the structure gives consideration to balance in performances of the X, Y and Z coils, the composite cooling water pipe is used, thermal conductivity of a cooling system is improved, and the uniform field space is located in a water cooling system, so that temperature stability of a uniform field material is guaranteed, and uniformity of a magnetic field is guaranteed.

Description

Technical field: [0001] The invention belongs to the technical field of MRI gradient coils, in particular to a gradient coil using composite cooling water pipes. Background technique: [0002] The gradient coil is one of the core components of the MRI (Magnetic Resonance Imaging, English full name: Magnetic Resonance Imaging) system, which mainly realizes frequency encoding, phase encoding and layer selection during the MRI scanning process. [0003] The existing traditional gradient coil structure uses the hollow Z main coil and Z shielding coil as the cooling channel. In order to reduce the influence of eddy current, the diameter of the coil should not be too large, which will affect the heat dissipation effect. If different connection methods are used to meet the heat dissipation requirements , will form too many joints, increasing the probability of water leakage. At the same time, the biggest problem of this coil is that it cannot realize the separation of water and ele...

AI Technical Summary

Problems solved by technology

[0003] The existing traditional gradient coil structure uses the hollow Z main coil and Z shielding coil as the cooling channel. In order to reduce the influence of eddy current, the diameter of the coil should not be too large, which will affect the heat dissipation effect. If different connection methods are used to meet the heat dissipation requirements , will form too many joints, increasing the probability of water leakage. At the same time, the biggest problem of this coil is that it cannot realize the separation of water and electricity. To ensure the safety of patients, deionized water must be used, which increases the difficulty and cost of maintenance.

The patent is ZL201420289868.3 "An Active Shielding Gradient Coil Structure". The structure proposed in this patent improves the heat dissipation capability of the gradient coil by sacrificing the performance of a part of the Z coil. However, this design does not consider many technological difficulties in the manufacturing process. Consider the user's requirements for radio frequency shielding and shimming space, as well as the impact of the coil based on this structure on the uniformity of the magnetic field

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