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Method and apparatus for correcting an error in the co-registration of coordinate systems used to represent objects displayed during navigated brain stimulation

A coordinate system and registration technology, applied in magnetic therapy, electrotherapy, using the magnetic field generated by the coil, etc., can solve problems such as impossible point-to-point matching

Inactive Publication Date: 2009-08-26
NEXSTIM
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  • Abstract
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  • Application Information

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Problems solved by technology

[0013] 3. Point-to-point matching is not possible
However, the aforementioned errors in registration often cause the TMS coil device to appear on the NBS display above or inside the scalp, where it would not be possible

Method used

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  • Method and apparatus for correcting an error in the co-registration of coordinate systems used to represent objects displayed during navigated brain stimulation
  • Method and apparatus for correcting an error in the co-registration of coordinate systems used to represent objects displayed during navigated brain stimulation

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Embodiment Construction

[0027] In NBS, a display typically shows the position of the TMS coil device relative to the subject's scalp, while the user moves the TMS coil device to stimulate target points in the brain. For example, as described in US Patent No. 6,827,681, incorporated herein by reference. To generate such a display, the coordinate system representing the subject's head in the image data (e.g., MRI image data) is aligned with the coordinate system representing the TMS using conventional algorithms known in the art for transforming the different coordinate systems into a single registered coordinate system. The coordinate system of the position of the coil arrangement and the tracker on the head is related.

[0028] figure 1 An exemplary NBS system 10 is shown that, when a user moves a TMS coil device to stimulate a target point on a subject's brain, correlates a coordinate system on an NBS display for generating a representation of a subject, such as a TMS The coil device, the head, or...

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Abstract

An error in the co-registration of a coordinate system used to represent a head of a subject in image data with a coordinate system used to represent the location of trackers affixed to the scalp surface of the head and a tracked device, such as a transcranial magnetic stimulation ('TMS') induction coil device, is corrected using information representative of the actual distance between the tracked device and the scalp of the subject, such that representations of the tracked device and the subject's head are accurately shown on a display of a navigated brain stimulation ('NBS') system tracking movement of the tracked device in relation to the subject's head. The correction of the error in the co-registration is performed without collecting additional tracking information from trackers on a tracked TMS coil device and the head, which avoids interrupting NBS using the TMS coil device.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Application No. 60 / 825,462, filed September 13, 2006, which is assigned to the assignee of the present application and is incorporated herein by reference. technical field [0003] The present invention relates generally to transcranial magnetic stimulation and, more particularly, to displaying an accurate representation of a transcranial stimulation coil relative to a subject's head during navigational brain stimulation. Background technique [0004] Transcranial magnetic stimulation (TMS) uses an induction coil in which a time-varying magnetic field is generated to induce an electric field ("E-filed") within the brain. Neurons at locations in the brain that are exposed to a sufficiently strong electric field will be activated or stimulated. In navigated brain stimulation (NBS), the electric field induced in the brain by the TMS induction coil is shown as an overl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61N2/00G06T7/00
CPCA61N1/08G06T2207/30016G06T7/0024A61N2/006A61N2/02G06T7/30
Inventor 贾默·罗霍尼恩波尔图·斯皮拉瑞尼·赫梅里斯图·艾莫涅米嘉瑞·卡鲁
Owner NEXSTIM
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