Closed MRI magnet having compact design

摘要

A closed magnetic resonance imaging (MRI) magnet (110) has a single superconductive coil assembly (112) including a coil housing (114) containing a pair of superconductive main coils (128, 130), a pair of superconductive bucking coils (136, 138) carrying electric current in a direction opposite to that of the main coils and positioned longitudinally between the main coils at roughly the same radial distance as the main coils, and at least one additional superconductive main coil (146, 148) carrying electric current in the same direction as the main coils and positioned longitudinally between the bucking coils. The coil arrangement allows the design of a shorter MRI magnet. <IMAGE>