High-precision absolute positioning of medical instruments in MRI systems

被引：0
|
作者：
Aboussouan, Eric [1 ]
Martel, Sylvain [1 ]
机构：
[1] Univ Montreal, Inst Biomed Engn, Dept Comp Engn, Ecole Polytech Montreal Nanorobot Lab, Montreal, PQ, Canada
来源：
2006 28TH ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY, VOLS 1-15 | 2006年
基金：
加拿大创新基金会; 加拿大自然科学与工程研究理事会;
关键词：
convolution; absolute positioning; MRI; microdevice; ferromagnetic tracking;
D O I：
暂无
中图分类号：
R318 [生物医学工程];
学科分类号：
0831 ;
摘要：
An absolute positioning technique has been developed for ferromagnetic markers in medical instruments and untethered devices operating in a Magnetic Resonance Imaging (MRI) system. This technique allows high precision 3D readings of the location of the device with respect to the absolute center of the MRI bore. The local magnetic field induced by the device is used as a signature for localization from 3 one-dimensional projections. A convolution between two acquisitions based on opposite read-out gradients is used to obtain (be absolute position of the device witbout any effect from the susceptibility distortion. The validity of the method has been demonstrated and its precision was found sufficient to correctly register the device position with MRI images.
引用
收藏
页码：3018 / +
页数：2
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