# US 11,998,278 B1 · Intraoperative computer-aided design of bone removal based on selected geometric shapes for robotic assisted surgery > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,998,278 B1 - Document ID: US11998278B1 - Status: Granted - Kind: B1 - Application number: 17/189,566 - Filed: 2021-03-02 - Granted: 2024-06-04 - Earliest claimed: 2020-03-02 - Assignees: Smith & Nephew, Inc.; Smith & Nephew Orthopaedics AG; Smith & Nephew Asia Pacific Pte. Limited - Applicants: Smith & Nephew, Inc.; Smith & Nephew Asia Pacific Pte. Limited; Smith & Nephew Orthopaedics AG - Inventors: Samuel C. Dumpe; Riddhit Mitra - Web page: https://patentgrep.com/patent/US11998278B1 ## CPC - A61B 34/10: Computer-aided planning, simulation or modelling of surgical operations - A61B 34/25: {User interfaces for surgical systems} - A61B 90/37: {Surgical systems with images on a monitor during operation} - G02B 27/017: {Head mounted} - A61B 2034/105: {Modelling of the patient, e.g. for ligaments or bones} - A61B 2034/258: {providing specific settings for specific users} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract A method and system for updating a bone model for a surgical procedure is provided. The computer system can include a display screen for displaying a GUI that allows a user to define one or more shapes to generate a selected volume of a bone model. The computer system can update the bone model to remove the selected volume as defined by the user. The computer system can display the updated bone model to the user and/or use the updated bone model to guide the surgeon to remove the portions of the patient's bone corresponding to the updated bone model under robotic assistance. ## Claims ### Claim 1 A computer-implemented method comprising: displaying, by a display screen of a computer system, a graphical user interface comprising a plurality of shape selection user interface elements, the plurality of shape selection user interface elements defining a plurality of geometric shapes that are manipulable by a user via the graphical user interface; receiving, by the computer system, a bone model; receiving, by the computer system, a selected area on the bone model defined according to at least one of the plurality of geometric shapes selected by a user via at least one of the plurality of shape selection user interface elements; defining, by the computer system, a selected volume of the bone model according to the selected area; voxelizing, by the computer system, the selected volume; removing, by the computer system, voxels corresponding to the voxelized selected volume from the bone model to generate an updated bone model; and displaying, by the display screen of the computer system, the updated bone model. ### Claim 2 (depends on 1) The computer-implemented method of claim 1, further comprising: displaying, by the display screen of the computer system, a portion of bone to be removed according to the updated bone model. ### Claim 3 (depends on 1) The computer-implemented method of claim 1, further comprising: calculating, by the computer system, a parameter associated with the selected area; and displaying, by the display screen, the calculated parameter. ### Claim 4 (depends on 3) The computer-implemented method of claim 3, wherein the parameter comprises an angle of the selected area. ### Claim 5 (depends on 1) The computer-implemented method of claim 1, wherein the plurality of geometric shapes comprises at least one of a circle, an oval, a rectangle, a triangle, a polygon, a spline, or any other closed shape. ### Claim 6 (depends on 1) The computer-implemented method of claim 1, wherein defining the selected volume of the bone model according to the selected area comprises: extending the selected area through the bone model in a direction transverse to a plane of the selected area to a depth to define the selected volume. ### Claim 7 (depends on 6) The computer-implemented method of claim 6, wherein the depth is selected by the user. ### Claim 8 (depends on 1) The computer-implemented method of claim 1, wherein the selected area comprises a first selected area, the method further comprising: receiving, by the computer system, a second selected area on the bone model defined according to at least one of the plurality of geometric shapes selected by a user via at least one of the plurality of shape selection user interface elements, wherein the selected volume of the bone model is defined according to the first selected area and the second selected area. ### Claim 9 (depends on 1) The computer-implemented method of claim 1, wherein defining the selected volume of the bone model according to the selected area comprises: rotating the selected area to define the selected volume. ### Claim 10 (depends on 1) The computer-implemented method of claim 1, wherein the display screen comprises at least one of a monitor or a head-mounted display. ### Claim 11 A computer system comprising: a display screen; a processor; and a memory coupled to the processor, the memory storing instructions that, when executed by the processor, cause the computer system to: display, by the display screen a graphical user interface comprising a plurality of shape selection user interface elements, the plurality of shape selection user interface elements defining a plurality of geometric shapes that are manipulable by a user via the graphical user interface, receive a bone model, receive a selected area on the bone model defined according to at least one of the plurality of geometric shapes selected by a user via at least one of the plurality of shape selection user interface elements, define a selected volume of the bone model according to the selected area, voxelize the selected volume, remove voxels corresponding to the voxelized selected volume from the bone model to generate an updated bone model, and display, by the display screen, the updated bone model. ### Claim 12 (depends on 11) The computer system of claim 11, wherein the memory stores further instructions that, when executed by the processor, cause the computer system to display a portion of bone to be removed according to the updated bone model on the display screen. ### Claim 13 (depends on 11) The computer system of claim 11, wherein the memory stores further instructions that, when executed by the processor, cause the computer system to: calculate a parameter associated with the selected area, and display the calculated parameter on the display screen. ### Claim 14 (depends on 13) The computer system of claim 13, wherein the parameter comprises an angle of the selected area. ### Claim 15 (depends on 11) The computer system of claim 11, wherein the plurality of geometric shapes comprises at least one of a circle, an oval, a rectangle, a triangle, a polygon, a spline, or any other closed shape. ### Claim 16 (depends on 11) The computer system of claim 11, wherein the memory stores further instructions that, when executed by the processor, cause the computer system to: extend the selected area through the bone model in a direction transverse to a plane of the selected area to a depth to define the selected volume. ### Claim 17 (depends on 16) The computer system of claim 16, wherein the depth is selected by the user. ### Claim 18 (depends on 11) The computer system of claim 11, wherein the selected area comprises a first selected area and the memory stores further instructions that, when executed by the processor, cause the computer system to: receive a second selected area on the bone model defined according to at least one of the plurality of geometric shapes selected by a user via at least one of the plurality of shape selection user interface elements, wherein the selected volume of the bone model is defined according to the first selected area and the second selected area. ### Claim 19 (depends on 11) The computer system of claim 11, wherein the memory stores further instructions that, when executed by the processor, cause the computer system to: rotate the selected area to define the selected volume. ### Claim 20 (depends on 11) The computer system of claim 11, wherein the display screen comprises at least one of a monitor or a head-mounted display.