Correcting a segmentation curve in an anatomical model

A method, comprising:

• obtaining a three-dimensional mesh representing a first anatomical portion and a second anatomical portion, which is connected to the first anatomical portion;
• receiving, from a user, an input indicating multiple points corresponding to a boundary between the first anatomical portion and the second anatomical portion;
• fitting a curve to the points and projecting the curve onto the mesh;
• subsequently to projecting the curve onto the mesh, in response to the curve not being closed, performing an iterative process without receiving additional user input until the curve is closed, each iteration of the process including:
• computing a path of minimal geodesic distance passing between endpoints of a curve on the mesh, wherein each of the endpoints is a disconnected point terminating the curve,
• adding, to the points, another point lying on the mesh between the endpoints of the curve, wherein the other point is added at a midpoint of the path outside of the curve, and
• subsequently to adding the other point, refitting the curve to the points.

A system, comprising:

• a display;
• and
• a processor, configured to:
• obtain a three-dimensional mesh representing a first anatomical portion and a second anatomical portion, which is connected to the first anatomical portion,
• receive, from a user, an input indicating a boundary between the first anatomical portion and the second anatomical portion,
• based on the input, fit a closed curve to multiple points on the mesh,
• in response to the curve not segmenting the mesh into two separate parts, perform an iterative process without receiving additional user input until the curve segments the mesh into two separate parts, each iteration of the process including:
• moving each point of the points to another location on the mesh, and
• subsequently to moving each point, refitting the curve to the points, and
• based on the curve, display the mesh on the display so as to demarcate the first anatomical portion from the second anatomical portion.

A method, comprising:

• obtaining a three-dimensional mesh representing a first anatomical portion and a second anatomical portion, which is connected to the first anatomical portion;
• receiving, from a user, an input indicating a boundary between the first anatomical portion and the second anatomical portion;
• based on the input, fitting a closed curve to multiple points on the mesh;
• and
• in response to the curve not segmenting the mesh into two separate parts, performing an iterative process without receiving additional user input until the curve segments the mesh into two separate parts, each iteration of the process including:
• moving each point of the points to another location on the mesh, and
• subsequently to moving each point, refitting the curve to the points.