发明名称 |
Device for detecting a position and an orientation of a medical insertion tool inside a body cavity |
摘要 |
The present invention relates to a device for detecting a position and an orientation of an insertion portion of a medical insertion tool which is inserted inside a body cavity, from the outside, and a detecting method therefor. An object of the present invention can achieve a downsized and lightweight insertion portion so as to be smoothly and easily insertable into even a narrow body cavity such as a blood vessel inside a skull, without having a bad influence on a vital tissue. Moreover, another object thereof is to make it possible to detect the three-dimensional position and orientation of the insertion tool very accurately while minimizing a noise. According to the present invention, a permanent magnet or a ferromagnetic body 4 is attached to an insertion portion 2 of a catheter 1 as an example of the medical insertion tool, which is inserted into the body cavity. On the other hand, outside the body cavity, at least three triaxial MI sensors 5 having triaxial directivity to the magnetic field generated from the permanent magnet or the ferromagnetic body 4 are equally spaced around a scope to be detected. The magnetic field measurement signal processing circuit 6 is connected to the triaxial MI sensors 5. <IMAGE> |
申请公布号 |
EP1438921(A1) |
申请公布日期 |
2004.07.21 |
申请号 |
EP20030025668 |
申请日期 |
2003.11.07 |
申请人 |
UCHIHASHI ESTEC CO., LTD.;IKEUCHI, KEN |
发明人 |
TOYODA, KAZUMI;OKAZAKI, TOMOKI;IKEUCHI, KEN |
分类号 |
G01B7/00;A61B1/00;A61B5/06;A61B19/00;A61M25/00;A61M25/01 |
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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