US 12,254,652 B2
Method for determining the three-dimensional positions of points in a target region on a patient in a reference coordinate system of a surgical visualization system and surgical visualization system
Christian Voigt, Abtsgmünd (DE); and Dominik Litsch, Schorndorf (DE)
Assigned to Carl Zeiss Meditec AG, Jena (DE)
Filed by Carl Zeiss Meditec AG, Jena (DE)
Filed on Mar. 14, 2023, as Appl. No. 18/121,185.
Claims priority of application No. 10 2022 202 555.5 (DE), filed on Mar. 15, 2022.
Prior Publication US 2023/0298206 A1, Sep. 21, 2023
Int. Cl. G06T 7/73 (2017.01); A61B 90/00 (2016.01); G02B 21/00 (2006.01); G02B 21/36 (2006.01); H04N 23/56 (2023.01)
CPC G06T 7/74 (2017.01) [A61B 90/361 (2016.02); A61B 90/39 (2016.02); G02B 21/0012 (2013.01); G02B 21/365 (2013.01); A61B 2090/3937 (2016.02); G06T 2207/10012 (2013.01); G06T 2207/10056 (2013.01); G06T 2207/30004 (2013.01); G06T 2207/30204 (2013.01); H04N 23/56 (2023.01)] 16 Claims
OG exemplary drawing
 
1. A method for determining three-dimensional positions of points in a target region on a patient in a reference coordinate system of a surgical visualization system, comprising:
a) generating at least one light marking by means of at least one light source of the surgical visualization system in the target region, with a pose of the at least one light source in the reference coordinate system and/or a light path in the reference coordinate system being known,
b) using at least one imaging unit of the surgical visualization system to capture at least one image representation containing the at least one light marking generated in the target region, with a pose of the at least one imaging unit in the reference coordinate system being known,
c) determining a three-dimensional position of the at least one light marking in the reference coordinate system proceeding from image coordinates of the at least one light marking in the captured at least one image representation, with the pose of the at least one light source and/or the respectively associated light path and the pose of the at least one imaging unit being taken into account,
d) repeating measures a) to c) multiple times, with a position of the at least one light marking within the target region being changed each time, and
providing the three-dimensional positions determined for the points of the target region in the reference coordinate system based on the light markings.