Patent ID: 7473843
Filing Date: 2009-01-06
Classification: A61K,A61N,B82Y,G01R,H01B,H01F

Abstract:
1. A magnetic resonance imaging tracking assembly that comprises a medical device having a magnetic shield comprised of a layer of nanomagnetic material, means for contacting said magnetic shield with a first high frequency electromagnetic wave, means for modifying said first high frequency electromagnetic wave with said magnetic shield to produce a second high frequency electromagnetic wave, and means for transmitting said second high frequency electromagnetic wave from said layer of nanomagnetic material, wherein: said medical device is disposed within a biological organism, said nanomagnetic material has an average particle size of less than about 100 nanometers, said layer of nanomagnetic material has a saturation magnetization of from about 200 to about 26,000 Gauss, said layer of nanomagnetic material is disposed between said first high frequency electromagnetic wave and said medical device, said layer of nanomagnetic material has a thickness of less than about 2 microns, said first high frequency electromagnetic wave has a frequency of from at least 21 megahertz to about 128 megahertz.