US 11,989,914 B2
System and method for calibration between coordinate systems of 3D camera and medical imaging apparatus and application thereof
Yu Huang, Beijing (CN); Fanbo Meng, Beijing (CN); and Yanran Xu, Beijing (CN)
Assigned to GE Precision Healthcare LLC, Wauwatosa, WI (US)
Filed by GE Precision Healthcare LLC, Wauwatosa, WI (US)
Filed on Mar. 3, 2023, as Appl. No. 18/178,310.
Application 18/178,310 is a continuation of application No. 16/884,757, filed on May 27, 2020, granted, now 11,600,021.
Claims priority of application No. 201910506016.2 (CN), filed on Jun. 12, 2019.
Prior Publication US 2023/0206501 A1, Jun. 29, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G06T 7/80 (2017.01); A61B 5/00 (2006.01); A61B 5/055 (2006.01); A61B 6/00 (2006.01); A61B 6/10 (2006.01); G06T 7/73 (2017.01); H04N 13/246 (2018.01)
CPC G06T 7/80 (2017.01) [A61B 5/0035 (2013.01); A61B 5/0037 (2013.01); A61B 5/055 (2013.01); G06T 7/73 (2017.01); H04N 13/246 (2018.05); A61B 6/102 (2013.01); A61B 6/488 (2013.01); A61B 2560/0238 (2013.01); G06T 2207/10028 (2013.01); G06T 2207/30196 (2013.01); G06T 2207/30204 (2013.01); G06T 2207/30244 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A system for calibration between a coordinate system of a 3D camera and a coordinate system of a medical imaging apparatus, the system comprising:
a laser to emit laser beams in the medical imaging apparatus, the laser beams to intersect at a center of the medical imaging apparatus;
a calibration tool provided with a reference point, markers, and two auxiliary lines intersecting at the reference point, wherein the auxiliary lines coincide with the laser beams and the reference point is aligned with the center of the medical imaging apparatus to serve as an origin of a coordinate system of the medical imaging apparatus;
a 3D camera for capturing images of the markers and determining positions of the markers in the coordinate system of the 3D camera based on the captured images; and
a calculation device performing calibration between the coordinate system of the 3D camera and the coordinate system of the medical imaging apparatus using the positions of the markers in the coordinate system of the 3D camera and the positions of the markers in the coordinate system of the medical imaging apparatus.