Close-in shielding system for magnetic medical treatment instruments

A shield for shielding a magnetic field generated by a magnetic medical device which includes a magnet, the shield comprising:

• a tube having cylindrically shaped sides spaced apart by opposite planar ceiling and floor panels, the floor panel being at a different distance from the magnet than the ceiling panel, the tube having opposite open ends separated by the sides and a center axis extending between the open ends, the tube having an interior surface defining an operating volume in which the magnetic medical treatment instrument is placed, the operating volume having sufficient space to allow a physician to enter and exit the operating volume through one of the open ends of the tube and operate the magnetic medical device.

A shield for controlling the magnetic field emanating from a magnetic medical device wherein the magnetic medical device has a magnet that produces the magnetic field, the magnet moves about an operating table having a top surface upon which a patient reposes while being operated on by a physician, the shield comprising:

• a circular shaped band having opposite open ends and a center axis extending perpendicularly between the open ends, the band being circumsuperjacent the magnet in a manner to allow the physician to enter an interior of the band and operate on the patient, the band having opposite first and second parallel planar portions, the top surface of the operating table and the first and second planar portions being parallel to each other, the operating table having a length and a width and the length being parallel to the center axis of the band, and the first planar position being closer to the magnet than the second planar position.