IP Library › Granted Patent US 12,394,086
Granted Patent B2
US 12,394,086 · App. 17/662,666 · Granted Aug 19, 2025

Accuracy check and automatic calibration of tracked instruments

Inventor: Sanjay M. Joshi (Andover, MA)
Assignee: Globus Medical, Inc.
G06T7/74A61B34/20A61B2034/2055A61B2034/2061A61B2034/2065A61B2034/2072A61B2090/3764
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Quick Facts
Patent No.
US 12,394,086
App. No.
17/662,666
Granted
Aug 19, 2025
Kind
B2
Abstract

A system configured to perform an accuracy check of a tracked instrument can include a processing circuitry and memory coupled to the processing circuitry. The memory can include instructions to cause the system to perform operations. The operations can include determining a virtual position of a display device. The operations can further include determining a virtual position of the tracked instrument. The operations can further include determining a point of contact on the display device between the tracked instrument and the display device. The operations can further include determining an expected point of contact on the display device between the tracked instrument and the display device based on the virtual position of the display device and the virtual position of the tracked instrument. The operations can further include determining whether the tracked instrument is accurate based on a difference between the point of contact and the expected point of contact.

Claims (38)

1. A system configured to perform an accuracy check of a tracked surgical instrument, the system comprising:

a camera;

processing circuitry;

wherein the camera is coupled to the processing circuitry; and

memory coupled to the processing circuitry and having instructions stored therein that are executable by the processing circuitry to cause the system to perform operations including:

determining information about a shape of a touch sensor relative to a reference element coupled to the touch sensor;

capturing, via the camera, an image of the reference element coupled to the touch sensor;

determining a virtual position of the reference element coupled to the touch sensor based on the image of the reference element coupled to the touch sensor, the virtual position of the reference element coupled to the touch sensor including a virtual location and a virtual pose of the reference element coupled to the touch sensor;

determining a virtual position within a virtual space of the touch sensor based on the information about the shape of the touch sensor and the virtual position of the reference element coupled to the touch sensor, the virtual position of the touch sensor including a virtual location and a virtual pose of the touch sensor;

determining information about a shape of the tracked surgical instrument relative to a reference element coupled to the tracked surgical instrument;

capturing, via the camera, an image of the reference element coupled to the tracked surgical instrument;

determining a virtual position of the reference element coupled to the tracked surgical instrument based on the image of the reference element coupled to the tracked surgical instrument, the virtual position of the reference element coupled to the tracked surgical instrument including a virtual location and a virtual pose of the reference element coupled to the tracked surgical instrument;

determining a virtual position within the virtual space of the tracked surgical instrument based on the shape of the tracked surgical instrument and the reference element coupled to the tracked surgical instrument, the virtual position of the tracked surgical instrument including a virtual location and a virtual pose of the tracked surgical instrument;

determining a point of contact on the touch sensor between the tracked surgical instrument and the touch sensor;

determining an expected point of contact on the touch sensor between the tracked surgical instrument and the touch sensor based on the virtual position of the touch sensor and the virtual position of the tracked surgical instrument; and

determining whether the tracked surgical instrument is accurate based on a difference between the point of contact and the expected point of contact.

2. The system of claim 1 , wherein determining the information about the shape of the tracked surgical instrument includes determining an intended position of a tip of the tracked surgical instrument relative to the reference element coupled to the tracked surgical instrument,

wherein determining the point of contact on the touch sensor includes determining a point of contact between the tip of the tracked surgical instrument and the touch sensor, and

wherein determining the expected point of contact on the touch sensor includes determining a point of contact between the tip of the tracked surgical instrument and the touch sensor based on the virtual position of the touch sensor and the virtual position of the tracked surgical instrument.

3. The system of claim 1 , wherein the system comprises:

the touch sensor coupled to the processing circuitry, the touch sensor including a touchscreen,

wherein determining the point of contact includes detecting a location on the touchscreen that the tracked surgical instrument is touching.

4. The system of claim 3 , wherein the touch sensor includes a plurality of touch sensors coupled together to form an opening, and

wherein determining the point of contact on the touch sensor includes determining a plurality of points of contact, each point of contact between one of the touch sensors of the plurality of touch sensors and the tracked surgical instrument while the tracked surgical instrument is positioned in the opening.

5. The system of claim 1 , wherein determining the point of contact on the touch sensor includes determining a plurality of points of contact between the tracked surgical instrument and the touch sensor,

wherein determining the expected point of contact on the touch sensor includes determining a plurality of expected points of contact between the tracked surgical instrument and the touch sensor based on the virtual position of the touch sensor and the virtual position of the tracked surgical instrument, and

wherein determining whether the tracked surgical instrument is accurate includes determining whether the tracked surgical instrument is accurate based on a difference between the plurality of points of contact and the plurality of expected points of contact.

6. The system of claim 1 , wherein determining whether the tracked surgical instrument is accurate includes determining that the difference exceeds a predetermined threshold,

the operations further including:

outputting an indication that the tracked surgical instrument is not suitable for use.

7. The system of claim 1 , wherein determining whether the tracked surgical instrument is accurate includes determining that the difference exceeds a predetermined threshold,

the operations further including:

calibrating a tracking system used to track the tracked surgical instrument using at least one of the point of contact, the expected point of contact, and the difference.

8. The system of claim 1 , wherein the system comprises:

a display device coupled to the processing circuitry, the display device including the touch sensor,

the operations further including:

displaying, via the display device, an indication of the expected point of contact,

wherein determining the point of contact on the display device between the tracked surgical instrument and the display device includes receiving an indication of the point of contact on the display device from a user.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 10, 2022
From: JOSHI, SANJAY M.
To: GLOBUS MEDICAL, INC.
Reel/Frame 059878/0434 →
Continuity (1)
Related Publication 20230363827A1 · Nov 16, 2023
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