Gradient magnetic field coil and magnetic resonance imaging device

摘要

In the magnetic resonance imaging device, the distance between the first and second coils is different in the circumferential direction and has a first region (A1) (θ=0, π) and a second region (A2) (θ=π/2) narrower than the first region (A1). In the first coil, wiring patterns (17a, 17b) on the side of a zero-plane (F0) passing through the center of the first coil and perpendicular to the axis direction (z-axis direction) meander in the circumferential direction such that the wiring patterns (17a, 17b) depart from the zero-plane (F0) in the first region (A1) and approach the zero-plane (F0) in the second region (A2). This provides a gradient magnetic field coil capable of configuring wiring patterns without using a loop coil that does not pass through the z-axis.

主权项

1. A gradient magnetic field coil, comprising:
a first coil substantially in a solenoid form for generating a magnetic field distribution that is linear in an axis direction in an image capturing region of a magnetic resonance imaging device; and a second coil that is substantially in a solenoid form and is arranged outside the first coil and inside a static magnetic field coil device for generating a static magnetic field with a uniform magnetic field distribution in the image capturing region, the second coil reducing a residual magnetic field from the first coil to the static magnetic field coil, wherein a gap between the first coil and the second coil changes in a circumferential direction, the gap including a first region and a second region in which the gap between the first coil and the second coil is narrower than in the first region, and wherein the first coil is arranged such that a wiring pattern that is on a side of zero plane, the zero plane including a center of the first coil and being perpendicular to the axis direction, is serpentine in the circumferential direction such as to be distant from the zero plane in the first region and close to the zero plane in the second region.