US 11,712,586 B2
Compensating for target rotation with a collimation system
Andrea Cox, Madison, WI (US); and Eric Schnarr, McFarland, WI (US)
Assigned to Accuray Incorporated, Sunnyvale, CA (US)
Filed by Accuray Incorporated, Sunnyvale, CA (US)
Filed on Oct. 12, 2021, as Appl. No. 17/499,702.
Application 17/499,702 is a continuation of application No. 16/013,800, filed on Jun. 20, 2018, granted, now 11,147,989.
Prior Publication US 2022/0032087 A1, Feb. 3, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. A61N 5/10 (2006.01)
CPC A61N 5/1075 (2013.01) [A61N 5/1036 (2013.01); A61N 5/1039 (2013.01); A61N 5/1045 (2013.01); A61N 5/1069 (2013.01); A61N 5/1081 (2013.01); A61N 5/1083 (2013.01); A61N 2005/1055 (2013.01); A61N 2005/1059 (2013.01); A61N 2005/1061 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A method, comprising:
detecting a potential setup error in a radiation treatment delivery session of a radiation treatment delivery system, wherein the setup error corresponds to a change in a current position of a treatment target relative to a prior position of the treatment target, and wherein the change includes a rotation relative to the prior position of the treatment target; and
modifying, by a processor, one or more planned leaf positions of a multileaf collimator (MLC) of the radiation treatment delivery system to compensate for the potential setup error corresponding to the rotation of the prior position of the treatment target, wherein modifying the one or more planned leaf positions of the MLC comprises:
transforming sets of image data into a single coordinate system to generate transformed sets of image data;
determining, based on the transformed sets of image data, an amount of apparent translation of a portion of the treatment target within a radiation field; and
shifting a planned pattern of leaf positions based on the amount of apparent translation to compensate for the apparent translation.