| 摘要 |
PURPOSE:To cancel the leaked magnetic field efficiently and to generate a magnetic field in diagnosis space W highly in equality. CONSTITUTION:Each superconductive main coil 25a, 25b, 26a, and 26b is wound on each main coil bobbin 21a, 21b, 22a, and 22b made in the coil bobbin main body, and each superconductive canceling coils 27a, 27b, and 28 is wound on each cancel coil bobbin 23a, 23b, and 24 with a diameter larger than the diameter of the main coil bobbin made in the coil bobbin main body, whereby a magnetic flux lines are generated in approximately parallel at the center face of the coil, and the magnitudes of the magnetic fields become approximately the same in the same radial direction. |
