Magnetic resonance imaging device and gradient magnetic field coil
A magnetic resonance imaging and gradient magnetic field technology, which is applied in measuring devices, measuring magnetic variables, medical science, etc., can solve problems such as reducing operating efficiency, consuming helium gas, and degaussing time
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no. 1 Embodiment approach
[0034] figure 1 It is a functional block diagram showing the configuration of the MRI apparatus 100 according to the first embodiment. Such as figure 1 As shown, the MRI apparatus 100 includes a static field magnet 101, a static field power supply 102, a gradient magnetic field coil 103, a gradient magnetic field power supply 104, an RF coil 105, a transmitting unit 106, a receiving unit 107, a bed 108, a sequence control unit 120, and a computer 130 . In addition, the subject P (for example, a human body) is not included in the MRI apparatus 100 . in addition, figure 1 The shown structure is just an example. Each part may be suitably integrated or configured separately.
[0035] The static field magnet 101 is a hollow cylindrical magnet, and generates a static magnetic field in a substantially cylindrical (including elliptical) inner space. The static field magnet 101 is, for example, a superconducting magnet or the like, and is excited by being supplied with a current ...
no. 2 Embodiment approach
[0068] Next, a second embodiment will be described. Figure 9A as well as Figure 9B It is a figure which shows the gasket bag insertion guide 103f' in 2nd Embodiment. Such as Figure 9A as well as Figure 9B As shown, in the second embodiment, the gasket pocket insertion guide 103f' is divided into two upper and lower stages and formed in multiple stages. Figure 9A It is a figure showing the spacer layer 103c of the gradient magnetic field coil 103 viewed from the front, Figure 9B It is a figure which looked at gasket bag insertion guide 103f' from the front. Such as Figure 9B As shown, the spacer pocket insertion guide 103f' is divided into a relatively large first stage and a second stage smaller than the first stage.
[0069] Here, for example, as Figure 9B As shown in the first stage, the gasket bag insertion guide 103f' has a concave portion 103h and a convex portion 103g on the inner wall side. Typically, the concave portion 103h and the convex portion 103g ...
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