US 11,654,003 B2
Tooth scan model calibration
Fuming Wu, Pleasanton, CA (US); Vadim Matov, San Jose, CA (US); and Jihua Cheng, San Jose, CA (US)
Assigned to Align Technology, Inc., San Jose, CA (US)
Filed by Align Technology, Inc., San Jose, CA (US)
Filed on May 24, 2021, as Appl. No. 17/328,996.
Application 17/328,996 is a continuation of application No. 16/113,018, filed on Aug. 27, 2018, granted, now 11,013,582.
Application 16/113,018 is a continuation of application No. 14/622,763, filed on Feb. 13, 2015, granted, now 10,076,389, issued on Sep. 18, 2018.
Prior Publication US 2021/0275282 A1, Sep. 9, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. A61C 13/00 (2006.01); G16Z 99/00 (2019.01); A61C 7/00 (2006.01); G06F 30/00 (2020.01)
CPC A61C 13/0004 (2013.01) [A61C 7/002 (2013.01); G16Z 99/00 (2019.02); A61C 2007/004 (2013.01); G06F 30/00 (2020.01)] 20 Claims
OG exemplary drawing
1. A method comprising:
generating, by a processing device, a scan model that is a mathematical model to simulate an imaging process performed by an x-ray imaging device that created a two-dimensional x-ray image of at least one tooth, wherein the scan model uses an initial estimate of one or more parameters of the x-ray imaging device, the one or more parameters comprising a scan angle parameter indicative of a scan angle of the x-ray imaging device;
adjusting a two-dimensional contour of a three-dimensional model to cause a first component of the two-dimensional contour to approximately align with a second component of the two-dimensional x-ray image; and
calibrating the scan model based on data obtained from adjusting the two-dimensional contour.