发明授权
US5307808A Tracking system and pulse sequences to monitor the position of a device
using magnetic resonance
失效
跟踪系统和脉冲序列来监控使用磁共振的设备的位置
- 专利标题: Tracking system and pulse sequences to monitor the position of a device using magnetic resonance
- 专利标题(中): 跟踪系统和脉冲序列来监控使用磁共振的设备的位置
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申请号: US861718申请日: 1992-04-01
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公开(公告)号: US5307808A公开(公告)日: 1994-05-03
- 发明人: Charles L. Dumoulin , Steven P. Souza , Robert D. Darrow
- 申请人: Charles L. Dumoulin , Steven P. Souza , Robert D. Darrow
- 申请人地址: NY Schenectady
- 专利权人: General Electric Company
- 当前专利权人: General Electric Company
- 当前专利权人地址: NY Schenectady
- 主分类号: A61B5/055
- IPC分类号: A61B5/055 ; A61B5/06 ; G01R33/28 ; G01R33/32 ; G01R33/561 ; G01R33/563
摘要:
A tracking system employs magnetic resonance signals to monitor the position of a device such as a catheter within a subject. The device has a receiver coil which is sensitive to magnetic resonance signals generated in the subject. These signals are detected in the presence of magnetic field gradients and thus have frequencies which are substantially proportional to the location of the coil along the direction of the applied gradient. Signals are detected responsive to sequentially applied mutually orthogonal magnetic gradients to determine the position of the device in several dimensions. The position of the device as determined by the tracking system is superimposed upon independently acquired medical diagnostic images.
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