Gradient magnetic field coil and magnetic resonance imaging device
A technology of magnetic resonance imaging and gradient magnetic field, which is used in magnetic resonance measurement, measurement device, measurement of magnetic variables, etc., can solve problems such as the deterioration of the manufacturability of the connection part, the current path is not on the same plane, etc., to achieve smaller deformation and simple wiring. , create easy effects
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
no. 1 Embodiment approach
[0079] exist figure 2 In , a perspective view of a magnetic resonance imaging (MRI) apparatus 100 according to the first embodiment of the present invention is shown. The MRI apparatus 100 includes: a static magnetic field coil device 1 that generates a uniform static magnetic field inserted into the imaging region (imaging space) 7 of the subject 40 while lying on a bed 41; A gradient magnetic field coil 2 that spatially generates a gradient magnetic field with a magnetic field strength in a pulse shape; an RF coil 3 that irradiates a high-frequency pulse to the subject 40; a receiving coil (omitted) that receives magnetic resonance signals from the subject 40 illustration); and a computer system (illustration omitted) for processing the received magnetic resonance signals and displaying the tomographic image. Furthermore, according to the MRI apparatus 100, a tomogram showing the physical and chemical properties of the subject 40 can be obtained by using the nuclear magnet...
no. 2 Embodiment approach
[0125] exist Figure 12A 3 shows a cross-sectional view of the gradient coil 2A according to the second embodiment of the present invention cut on a plane including the x-axis and the y-axis. The gradient coil 2A of the second embodiment differs from the gradient coil 2 of the first embodiment in that the main coil 2a, particularly the z main coil 9z has a racetrack shape in cross section. However, the cross-sectional shape of the z main coil 9z is the same as that of the first embodiment, and the width in the x-axis direction (horizontal direction) becomes the maximum width. Therefore, in the subject 40 (see figure 2 ) in the case of lying on the back, there is room for insertion in the shoulder width direction, so it is possible to improve the alignment of the subject 40 with the MRI apparatus 100 (refer to figure 2 ) sense of spaciousness. (Gradient magnetic field) The central axis of the main coil 2a and the central axis of the (Gradient magnetic field) shield coil 2b ...
no. 3 Embodiment approach
[0130] exist Figure 13A 3 shows a cross-sectional view of the gradient coil 2B according to the third embodiment of the present invention cut on a plane including the x-axis and the y-axis. The gradient magnetic field coil 2B of the third embodiment is different from the gradient magnetic field coil 2 of the first embodiment in that the cross-sectional shape of the main coil 2a, particularly the z main coil 9z, is a circle around which the minor axis passes. The arc portion is an ellipse, and the arc portion of the periphery where the major axis of the ellipse passes is an arc with different curvatures such that the ellipse expands in the y-axis direction, and a plurality of arcs with different curvatures are combined. The shape of the arc. That is, the cross-sectional shape cut on a plane perpendicular to the axial direction of the (gradient magnetic field) main coil 2a is based on an ellipse, and the arc portions around both ends of the major axis of the ellipse are formed...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More