Frameless stereotaxy system for indicating the position and axis of a surgical probe
First Claim
1. A stereotaxy system comprising:
- a subject support;
a frame assembly which mounts a plurality of receivers in a fixed relationship to the subject support;
at least one of a pointer and a surgical tool;
a tool guide having at least two emitters mounted thereto, the at least two emitters selectively emitting signals which are received by the plurality of receivers, the tool guide defining a channel which selectively receives at least one of the pointer and the surgical tool such that at least one of the pointer and the tool is aligned with a trajectory defined by the tool guide; and
a position determining means for determining the trajectory defined by the tool guide from the emitted signals travelling between the emitters and the plurality of receivers.
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Accused Products
Abstract
A patient is secured to a subject support (10). A stereotaxic wand (40) is inserted into a tool guide (60). The wand has a tip portion (44), a portion extending along a pointing axis (46) of the wand, an offset portion (42) which is offset from the pointing axis of the wand, and at least two wand emitters (48, 50), mounted in alignment with the pointing axis of the wand. The two emitters selectively emit wand signals which are received by three receivers (14) mounted to a frame assembly (12). The tool guide includes a bore (66) extending along a guide axis. The bore is configured for selectively receiving a tool and the tip portion of the wand. An entry point and a trajectory are identified by the surgeon with the wand in the guide. More specifically, a trajectory and location of the wand are superimposed on a diagnostic image on a monitor (30). If the surgeon is satisfied with the entry point and trajectory shown on the monitor, a surgical tool is inserted into the bore while the tool guide is held along the designated trajectory and at the designated entry point.
341 Citations
24 Claims
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1. A stereotaxy system comprising:
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a subject support; a frame assembly which mounts a plurality of receivers in a fixed relationship to the subject support; at least one of a pointer and a surgical tool; a tool guide having at least two emitters mounted thereto, the at least two emitters selectively emitting signals which are received by the plurality of receivers, the tool guide defining a channel which selectively receives at least one of the pointer and the surgical tool such that at least one of the pointer and the tool is aligned with a trajectory defined by the tool guide; and a position determining means for determining the trajectory defined by the tool guide from the emitted signals travelling between the emitters and the plurality of receivers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A stereotaxy method comprising:
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a) securing a portion of a subject to a subject supporting surface in close proximity to a plurality of signal receivers that are mounted in a fixed relationship to the subject supporting surface; b) positioning a wand in a tool guide having at least two emitters mounted thereon for selectively emitting signals which are received by the receivers; c) positioning the wand and tool guide to designate selected locations on the subject portion; d) actuating the emitters individually in close temporal proximity to emit signals; and e) from the signals, calculating coordinates of the locations designated by the wand in a coordinate system of the subject support. - View Dependent Claims (10, 11, 12, 13)
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14. In combination a surgical tool and an apparatus for guiding the surgical tool in relation to a subject, the apparatus for guiding the surgical tool comprising:
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a guide means for guiding the surgical tool along a trajectory; and at least two signal emitters mounted in a fixed relationship to the guide means; a receiving means for receiving the signals emitted by the signal emitters; and a means connected to the receiving means for determining a position of the guide means. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. A method for guiding the application of a surgical tool in relation to a patient, the method comprising:
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acquiring electronic diagnostic image data of a patient; maneuvering a tool guide to a proposed trajectory in relation to a patient for application of a surgical tool, the tool guide including at least two signal emitters and being configured to selectively receive the surgical tool; receiving the signals emitted by the emitters; calculating coordinates of the signal emitters based on the received signals; calculating the trajectory to which the tool guide has been maneuvered based on the calculated emitter coordinates; correlating the calculated trajectory with the electronic diagnostic image data of the patient; and generating a human readable display of at least a portion of the image data with the trajectory superimposed thereon. - View Dependent Claims (22, 23, 24)
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Specification