US 11,832,977 B2
Method and apparatus for generating a 2D panoramic image
Susanne Maur, Bensheim (DE); and Stefan Eichner, Heidelberg (DE)
Assigned to DENTSPLY SIRONA INC., York, PA (US)
Appl. No. 17/424,951
Filed by DENTSPLY SIRONA inc., York, PA (US); and SIRONA DENTAL SYSTEMS GMBH, Bensheim (DE)
PCT Filed Jan. 23, 2020, PCT No. PCT/EP2020/051649
§ 371(c)(1), (2) Date Jul. 22, 2021,
PCT Pub. No. WO2020/152278, PCT Pub. Date Jul. 30, 2020.
Claims priority of application No. 19153361 (EP), filed on Jan. 23, 2019.
Prior Publication US 2022/0022827 A1, Jan. 27, 2022
Int. Cl. A61B 6/14 (2006.01); G06T 7/73 (2017.01); A61B 6/00 (2006.01); G06T 3/40 (2006.01)
CPC A61B 6/14 (2013.01) [A61B 6/5241 (2013.01); G06T 3/4038 (2013.01); G06T 7/74 (2017.01); G06T 2207/10116 (2013.01); G06T 2207/30036 (2013.01)] 15 Claims
OG exemplary drawing
 
1. Method for generating a 2D panoramic image of an oral cavity comprising the steps
A) Provision of a plurality of projection images acquired during an at least partial revolution of a recording unit comprising a radiation source and an electronic image sensor about the oral cavity in a given position,
B) Calculation of an image including at least one anatomical feature from the plurality of projection images using a calculation rule with reconstruction parameters,
C) Provision of a model of the at least one anatomical feature, which describes the at least one anatomical feature in a target position in an image,
D) Identification of the at least one anatomical feature in the calculated image,
E) Determination of a deviation between an actual position of the at least one identified anatomical feature in the calculated image and the target position of the at least one anatomical feature in the model by applying a metric,
F) Variation of at least one of the reconstruction parameters and recalculation of at least one part of the image that shows the at least one anatomical feature using the calculation rule and the at least partially varied reconstruction parameters or variation of a pixel transformation and application of the pixel transformation to at least one part of the calculated image that shows the at least one anatomical feature, so that at least this part of the image is recalculated,
F-1) Redetermination of the deviation between the actual position of the at least one identified anatomical feature in the calculated image and the target position of the at least one anatomical feature in the model by applying a metric,
G) Derivation of the 2D panoramic image frons the recalculated image; and
H) Outputting the 2D panoramic image.