发明名称 |
REDUCED MAGNETIC FIELD DISTORTION IN MEDICAL TOOL |
摘要 |
<P>PROBLEM TO BE SOLVED: To provide a medical tool which reduces disturbance for measuring a position in a magnetic position tracking system. <P>SOLUTION: The medical tool for operating in a working volume of the magnetic position tracking system includes a first plurality of layers including an electrically conductive material and a second plurality of layers including an electrically insulating material and interleaved with the first plurality. The layers are arranged to reduce eddy current distortion in a magnetic field generated by the magnetic position tracking system. Another medical tool includes a core including a ferromagnetic material and an outer coating layer on the core. The coating layer includes a conductive material configured to produce eddy current distortion so as to cancel at least part of a distortion caused by the core in a magnetic field of the magnetic position tracking system. Yet another medical tool includes an electrically conducting loop-shaped element having an electrical discontinuity introduced therein, so as to reduce eddy current distortion caused by the loop-shaped element. <P>COPYRIGHT: (C)2008,JPO&INPIT |
申请公布号 |
JP2007298514(A) |
申请公布日期 |
2007.11.15 |
申请号 |
JP20070118970 |
申请日期 |
2007.04.27 |
申请人 |
BIOSENSE WEBSTER INC |
发明人 |
SHALGI AVI;NITZAN YAACOV;BAR-TAL MEIR;YARON URI |
分类号 |
G01B7/00;A61B17/56;A61B19/00;A61F2/28 |
主分类号 |
G01B7/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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