US 11,986,252 B2
ENT image registration
Akram Zoabi, Kfar Masser (IL); Yoav Pinsky, Bet Keshet (IL); Itamar Bustan, Zichron Ya'acov (IL); Assaf Govari, Haifa (IL); and Moshe Israel Shilemay, Haifa (IL)
Assigned to Biosense Webster (Israel) Ltd., Yokneam (IL)
Filed by Biosense Webster (Israel) Ltd., Yokneam (IL)
Filed on Aug. 10, 2017, as Appl. No. 15/674,380.
Prior Publication US 2019/0046272 A1, Feb. 14, 2019
Int. Cl. A61B 34/20 (2016.01); G06T 7/73 (2017.01); A61B 17/24 (2006.01); A61B 90/00 (2016.01)
CPC A61B 34/20 (2016.02) [G06T 7/73 (2017.01); A61B 17/24 (2013.01); A61B 2034/2051 (2016.02); A61B 2034/2065 (2016.02); A61B 2090/3762 (2016.02); G06T 2207/10081 (2013.01); G06T 2207/30008 (2013.01); G06T 2207/30041 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method, comprising:
(a) receiving a computerized tomography (CT) image comprising voxels of a head of a subject;
(b) analyzing the image to identify respective locations of a left eye and a right eye of the subject in the image, so as to define a first line segment joining the respective locations;
(c) identifying a voxel subset from the voxels of the head of the subject, the voxel subset comprising:
(i) voxels, overlaying a first bony section of the head, identified based on their lying on a second line segment parallel to the first line segment; and
(ii) voxels, identified based on their overlaying a second bony section of the head, lying on a third line segment orthogonal to the first line segment;
(d) activating a magnetic tracking system configured to measure positions on the head of the subject;
(e) positioning a probe, operative in the magnetic tracking system, in proximity to the first and second bony sections to measure magnetic-system-positions of a surface of the head overlaying the first and second bony sections;
(f) forming a correspondence between the magnetic-system-positions and the voxel subset; and
(g) generating a registration between the CT image and the magnetic tracking system in response to the correspondence.