US 9,852,509 B2 · Method for tibia resection alignment approximation in knee replacement procedures

Abstract

Aspects of the present disclosure involve systems, methods, computer program products, and the like, for utilizing a series of images of a patient's anatomy to determine a cut plane for use during a knee procedure. To determine a cut plane for use during a knee replacement procedure, the 2D images may be analyzed by a computer program to determine a best fit plane through one or more points along the proximal surface of the tibia and to determine one or more features of depressions within the proximal surface. With these landmarks identified in the images, a cut plane through the tibia for use during a TKA procedure may be determined. Further, the location of these features in the images may be determined by analyzing the gray scale value of one or more pixels around a selected point on the image. The pixel with the lowest gray scale value may then be assumed to be the edge of the cortical bone in the 2D image.

Claims24

Dependent claims

A method for determining a cut plane through a human tibia for an arthroplasty procedure on a human knee, the method comprising:

receiving a plurality of two-dimensional (2D) images of a patient's joint subject to the arthroplasty procedure at a computing device;
determining a plane for a plurality of points along a table surface of a human tibia of a first set of 2D images of the plurality of 2D images, the table surface comprising at least a portion of a proximal end of the human tibia, said plurality of points comprising at least three points;
wherein the plane for the plurality of points along the table surface of the human tibia is a best fit plane along the table surface of the human tibia within the at least one of the plurality of 2D images;
wherein the plurality of points along the table surface of the human tibia of the first set of 2D images are determined by:
obtaining a reference point on the at least one of the plurality of 2D images;
creating a range of pixels of the at least one of the plurality of 2D images from the reference point, wherein each pixel in the range of pixels comprises a gray scale value;
and
determining the pixel in a first range of pixels with the lowest gray scale value;
calculating a cut plane for use during the arthroplasty procedure on a human knee, wherein the cut plane is parallel to the calculated plane for the plurality of points along the table surface of the human tibia of the first set of 2D images of the plurality of 2D images;
and
generating a cutting jig for the arthroplasty procedure comprising a cut slot corresponding to the calculated cut plane.

8 more elements

A system for processing a medical scan of a patient in preparation for an arthroplasty procedure on a human knee, the system comprising:

a network interface configured to receive one or more medical images of a patient's anatomy;
and a processing device in communication with the network interface;
and
a computer-readable medium in communication with the processing device configured to store information and instructions that, when executed by the processing device, performs the operations of:
receiving a plurality of two-dimensional (2D) images of a patient's joint subject to the arthroplasty procedure at a computing device;
determining a plane for a plurality of points along a table surface of a human tibia of a first set of 2D images of the plurality of 2D images, the table surface comprising at least a portion of a proximal end of the human tibia said plurality of points comprising at least three points;
wherein the plane for the plurality of points along the table surface of the human tibia is a best fit plane along the table surface of the human tibia within the at least one of the plurality of 2D images;
wherein the plurality of points along the table surface of the human tibia of the first set of 2D images are determined by:
obtaining a reference point on the at least one of the plurality of 2D images;
creating a range of pixels of the at least one of the plurality of 2D images from the reference point, wherein each pixel in the range of pixels comprises a gray scale value;
and
determining the pixel in a first range of pixels with the lowest gray scale value;
calculating a cut plane for use during the arthroplasty procedure on a human knee, wherein the cut plane is parallel to the calculated plane for the plurality of points along the table surface of the human tibia of the first set of 2D images of the plurality of 2D images;
and
generating a cutting jig for the arthroplasty procedure comprising a cut slot corresponding to the calculated cut plane.

12 more elements

Dependencies are inferred from the claim text.

Method for tibia resection alignment approximation in knee replacement procedures

Life of this patent

Method for tibia resection alignment approximation in knee replacement procedures

Life of this patent

Abstract

Claims24