Title:
マイクロコイルを備える医療機器の位置を突きとめるための方法
Document Type and Number:
Japanese Patent JP4846582
Kind Code:
B2
Abstract:
An MR process locates a medical instrument with an attached microcoil in the examination volume of an MR device. The microcoil is part of a resonant circuit matched to the resonant frequency of the MR device and having no external controls. At least two temporally successive high frequency pulses (RF) are generated within the examination volume. After each of the high frequency pulses (RF), frequency-coded MR signals (S1, S2) from the examination volume are recorded. The position of the medical instrument is determined by analyzing the differences between the recorded MR signals (S1, S2).
Inventors:
Weiss Stephen
Application Number:
JP2006525979A
Publication Date:
December 28, 2011
Filing Date:
September 02, 2004
Export Citation:
Assignee:
Koninklijke Philips Electronics N.V.
International Classes:
A61B5/055; A61M25/00; G01R33/28; G01R33/54
Domestic Patent References:
| JP2003180655A | 2003-07-02 | |||
| JPH02261425A | 1990-10-24 | |||
| JPH08243088A | 1996-09-24 | |||
| JPH11239572A | 1999-09-07 | |||
| JP2000237161A | 2000-09-05 | |||
| JP2001190521A | 2001-07-17 | |||
| JP2003175013A | 2003-06-24 |
Attorney, Agent or Firm:
Susumu Tsugaru
Akihiko Miyazaki
Fueda Shusen
Akihiko Miyazaki
Fueda Shusen