US 12,136,222 B2
Structure contouring, such as for segmentation or radiation treatment planning, using a 3D paint brush combined with an edge-detection algorithm
Michel Moreau, Verona, WI (US)
Assigned to Elekta, Inc., Atlanta, GA (US)
Filed by Elekta, Inc., Atlanta, GA (US)
Filed on Apr. 11, 2022, as Appl. No. 17/658,783.
Claims priority of provisional application 63/261,287, filed on Sep. 16, 2021.
Prior Publication US 2023/0082049 A1, Mar. 16, 2023
Int. Cl. G06T 7/13 (2017.01); G06T 17/20 (2006.01)
CPC G06T 7/13 (2017.01) [G06T 17/205 (2013.01); G06T 2207/10081 (2013.01); G06T 2207/10116 (2013.01); G06T 2207/20104 (2013.01)] 28 Claims
OG exemplary drawing
 
1. A computer-implemented method of contouring of a region of interest based on imaging parameters of 3D spatial imaging data and guided by user input of locations in the spatial imaging data, the method comprising:
representing a paint brush shape for the contouring as a surface mesh including a plurality of rays and having a center located at a position of a cursor controlled by the user;
within the surface mesh, detecting structure edges for a boundary of the region of interest via an edge detection algorithm using the imaging parameters of the 3D spatial imaging data and along the plurality of rays;
smoothing the paint brush shape via a mesh smoothing algorithm; and
painting the boundary in the 3D spatial imaging data for display to the user, including:
painting the boundary in a current image slice; and
painting the boundary only in images slices in one direction from the current image slice, wherein the 3D spatial imaging data includes a plurality of image slices.