| 摘要 |
A magnetic field generating system for use in steering a catheter has X ( 2,3 ), Y ( 8,9 ) and Z ( 10, 11 ) magnetic field generators arranged to generate corresponding magnetic fields in mutually orthogonal, X, Y and Z directions. Each of the X and Y magnetic field generators comprises a pair of magnets each magnet having a polarity defining a magnetic axis. The magnets within each pair are arranged such that their magnetic axes are oriented in the Z direction in a substantially antiparallel manner with respect to one another, and are laterally spaced apart with respect to their magnetic axes. The corresponding magnetic fields cooperate to generate a resultant magnetic field in a working region ( 50 ) separated in the Z direction from the magnetic field generators. |
