| 摘要 |
The present invention relates to a magnetic resonance imaging system comprising a main magnet (102), the main magnet (102) comprising a magnet bore, the bore having a longitudinal axis (118) parallel to the main magnetic field of the main magnet (102), the magnet bore comprising a gradient coil system, wherein the gradient coil system comprises a first (108) satellite coil and an inner coil (114), wherein the first satellite coil comprises at least one pair of saddle coils (200; 202; 204; 206) arranged oppositely over the magnet bore and wherein the inner coil (114) comprises at least two pairs of saddle coils (208) arranged oppositely over the magnet bore, wherein the inner coil (114) is located at a larger diameter from the central axis (118) than the first (108) satellite coil, wherein the first satellite coil and the inner coil form a stepped coil structure. |
| 主权项 |
1. A magnetic resonance imaging system, comprising:
a magnet, the magnet comprising a magnet bore, the magnet bore having a longitudinal axis parallel to the magnetic field of the magnet; a gradient coil system within the magnet bore; and a shielding coil within the magnet bore,
wherein the gradient coil system comprises a first satellite coil, a second satellite coil, and an inner coil,wherein the first satellite coil comprises at least one pair of first saddle coils arranged oppositely within the magnet bore,wherein the second satellite coil comprises at least one pair of second saddle coils arranged oppositely within the magnet bore, andwherein the inner coil comprises at least two pairs of third saddle coils arranged oppositely within the magnet bore,wherein the inner coil is located at a larger radius from the central axis than the first and second satellite coils,wherein the first and second satellite coils and the inner coil form a stepped coil structure,wherein the first satellite coil is spatially separated from the second satellite coil by a longitudinal gap, andwherein the inner coil extends only in a longitudinal direction at least over the longitudinal gap,wherein the shielding coil is spatially arranged between the inner coil and the magnet,wherein the first and second satellite coils are serially electrically connected through an electrical connection with the shielding coil over inclined structural flanges,wherein the electrical conductors forming the first saddle coils of the first satellite coil and the second saddle coils of the second satellite coil are wound over the flanges forming the electrical connection. |
