System and method for distortion reduction in an electromagnetic tracker

A tracking system and tracker technology, applied in the field of ction i, tracking performance, can solve problems such as patient danger, inaccurate position measurement, etc.

Inactive Publication Date: 2007-01-24
GENERAL ELECTRIC CO
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Distortion can create inaccurate position measurements and potential hazards to patients

Method used

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  • System and method for distortion reduction in an electromagnetic tracker
  • System and method for distortion reduction in an electromagnetic tracker
  • System and method for distortion reduction in an electromagnetic tracker

Examples

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Embodiment Construction

[0024] For purposes of illustration only, the following detailed description refers to an embodiment of an electromagnetic tracking system for use with an image-guided surgery system. It should be understood that the present invention may be used with other imaging systems and other applications.

[0025] figure 1 A distortion processing system 100 employed in accordance with the present invention for improving the accuracy of position measurements within an electromagnetic (EM) tracker is shown. The system 100 includes an instrument 110 , a tracking analysis unit 120 and a tracking correction unit 130 . Tracking analysis unit 120 observes the tracking performance of instrument 110 . Track correction unit 130 attempts to improve or compensate the tracking performance of instrument 110 based on information from track analysis unit 120 . The tracking analysis unit 120 and the tracking correction unit 130 may be implemented as discrete units or a single unit by hardware and / or...

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Abstract

The present invention provides a system (100) and method (200) for distortion analysis and reduction in an electromagnetic (EM) tracker. The EM tracker may employ coils as receivers and transmitters. Certain embodiments of the system (100) include a tracking analysis unit (120) for analyzing a tracking behavior of an instrument (110) and a tracking modification unit (130) for compensating for the tracking behavior of the instrument (110). Such an instrument (110) is, for example, a medical instrument, such as a drill, a catheter, a scalpel or a scope. These instruments and their surroundings often include metal components. Positioning an EM navigation device, such as a receiver or a transmitter, on the instrument (110) may cause a distortion in the magnetic field which affects the tracking and tracking accuracy. Uses outside medical applications are foreseen, as are tracking systems other than EM tracking systems, such as ultrasound or inertial position.

Description

[0001] related application [0002] This application is related to and claims priority to US Provisional Application No. 60 / 520,138 (Attorney Docket No. 1333165NV), filed November 12, 2003, and entitled "System and Method for Distortion Reduction in an Electromagnetic Tracker." Background of the invention [0003] The present invention generally relates to electromagnetic tracking systems. In particular, the present invention relates to systems and methods for reducing distortion caused by tools and other elements within electromagnetic tracking systems. [0004] Practicing physicians, such as physicians, surgeons, and other medical personnel, often rely on technology when performing medical procedures such as image-guided surgery or examinations. For example, a tracking system may provide information about the positioning of a medical instrument relative to a patient or reference coordinate system. When the medical instrument is not within the practitioner's line of sight, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/06G01B7/00G01S5/02G01V3/10
Inventor P·T·安德森
Owner GENERAL ELECTRIC CO
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