US 12,285,274 B2
Systems and methods for generating calibration images for couch position calibration
Hongcheng Yang, Shanghai (CN); Supratik Bose, Houston, TX (US); Xuan Wu, Shanghai (CN); and Jonathan Maltz, Houston, TX (US)
Assigned to SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD., Shanghai (CN)
Filed by SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD., Shanghai (CN)
Filed on Jun. 9, 2022, as Appl. No. 17/806,256.
Application 17/806,256 is a continuation of application No. PCT/CN2020/118167, filed on Sep. 27, 2020.
Claims priority of application No. PCT/CN2019/124645 (WO), filed on Dec. 11, 2019.
Prior Publication US 2022/0313202 A1, Oct. 6, 2022
Int. Cl. A61B 5/00 (2006.01); A61B 5/055 (2006.01); A61B 6/04 (2006.01); A61B 6/58 (2024.01)
CPC A61B 5/704 (2013.01) [A61B 5/0036 (2018.08); A61B 5/055 (2013.01); A61B 5/706 (2013.01); A61B 6/0407 (2013.01); A61B 6/0492 (2013.01); A61B 6/582 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for couch position calibration implemented on a machine including at least one processor and at least one storage device, the method comprising:
obtaining one or more first images of a couch at one or more first locations in a first device, each of the one or more first images corresponding to one of the one or more first locations, the first device including an imaging device or a treatment device, wherein the couch includes a mark, and the mark intersects a first reference plane of the first device at a plurality of first points of the mark, the first reference plane being perpendicular to a longitudinal direction of the couch or the first reference plane being a rotating plane of the first device, the couch being configured to move between the first device and a second device along the longitudinal direction;
determining, in each of the one or more first images, a first position of a representation of each of the plurality of first points, the first position of the representation of each of the plurality of first points in each of the one or more first images referring to a position of the first point in the each of the one or more first images;
obtaining correlation information between respective positions of the plurality of first points in different coordinate systems, the correlation information including a magnification factor between a position of the couch in space and a position of the couch in the each of the one or more first images;
obtaining a second image of the couch at a second location in the second device; and
performing a couch position calibration by determining, based on the second image, the correlation information, and the one or more first images, a difference between a location of the couch in the first device and a location of the couch in the second device along a lateral direction of the couch.