(i9) United States
(12) Patent Application Publication
Shachar et al.
(75) Inventors: Yehoshua Shachar, Santa Monica, CA (US); Laszlo Farkas, Ojai, CA (US); Leslie Farkas, Ojai, CA (US)
KNOBBE MARTENS OLSON & BEAR LLP 2040 MAIN STREET, FOURTEENTH FLOOR IRVINE, CA 92614 (US)
(73) Assignee: Magnetecs,Inc, Inglewood, CA (US)
(51) Int. CI.
A61B 1/00 (2006.01)
H01F 3/00 (2006.01)
(52) U.S. CI 600/118; 335/297
A system that uses a magnetic aperture and electromagnets to configure a magnetic shaped field is described. In one embodiment, the system can be used for guiding a catheter or other devices through a patient's body. In further modification of the system, the waveguide field and field gradient is achieved by the use of varying the electromagnetic wave and its respective flux density axis. In one embodiment, one or more magnetic pole pieces (electromagnet cores) are configured with anisotropic permeability to control the shape of the resulting magnetic field. In one embodiment, the shape and permeability distribution in an electromagnet poleface is configured to produce the desired field distribution. In one embodiment, a number of electromagnets are arranged in a spherical pattern to produce a desired magnetic field in an enclosed spherical region. In one embodiment, a distal end of a catheter is provided with a plurality of magnets having different coercivity to allow improved control of the position and orientation of the distal end