| 摘要 |
PROBLEM TO BE SOLVED: To provide a magnetic coil device having a refrigeratory magnetic yoke having two magnetic pole pieces 7 and 8 opposed to each other at an interval via a magnetic field formation clearance 12 for a magnetic field applicator for heating a magnetic/magnetizable substance/solid inside a biotissue. SOLUTION: For generating an alternating magnetic field, the magnetic pole pieces 7 and 8 are arranged in two magnetic coils 22 formed of spiral coils 39 into disc-shaped coils, and the end parts of the magnetic pole pieces 7 and 8 are surrounded annularly by a clearance 57 between the magnetic coils and the magnetic pole pieces. In coil cases surrounding the magnetic pole pieces 7 and 8 annularly, the magnetic coils 22 are installed respectively. In coil cases 9 and 10, at least one of cooling air inlet openings 51, 52, and 53 connected to a cooling pump and at least one of cooling air outlet openings 57 and 66 are arranged. |
