| 摘要 |
A superconducting magnet for magnetic resonance imaging (MRI) or spectroscopy (MRS) has a plurality of discrete Niobium-Titanium superconductor coils 10 and at least two Niobium-Tin superconducting coils 16 arranged longitudinally along a common central axis 20. The Niobium-Titanium superconductor coils generate a first magnetic field having high field regions of at least 5 Tesla radially inward of the discrete coils. The Niobium-Tin coils are located in the high field regions of the first magnetic field and generate a second magnetic field which combines with the first magnetic field to produce a resultant magnetic field which is of higher field strength than that of the first magnetic field at a location on the common central axis. The magnet is arranged to have a radial separation between each Niobium-Tin coil and the closest Niobium-Titanium coil, and there is an axial bore 21 through the coils having a diameter of at least 150mm. |
