公开(公告)号：US20240371055A1

公开(公告)日：2024-11-07

申请号：US18291465

申请日：2022-06-27

Applicant: DENTSPLY SIRONA Inc.

Inventor： Susanne MAUR ,  Markus HUELSBUSCH

IPC: G06T11/00

Abstract: A method for geometric calibration of a DVT imaging in the dental field, including: (S1) reconstruction of a first volume from a sinogram with an initial projection geometry; (S2) detection of metal areas in the sinogram; (S3) correction of the metal areas in the sinogram; (S4) reconstruction of a second volume from the corrected sinogram from step (S3) with the initial or a varied projection geometry; (S5) geometrically calibrating by varying the projection geometry and evaluating by a similarity measure between a simulated sinogram of the reconstructed second volume and the sinogram or the corrected sinogram.

公开(公告)号：US20240257412A1

公开(公告)日：2024-08-01

申请号：US18578554

申请日：2022-07-05

Applicant: DENTSPLY SIRONA Inc. ,  SIRONA DENTAL SYSTEMS GMBH

Inventor： Susanne MAUR ,  Markus HUELSBUSCH

IPC: G06T11/00 ,  A61B6/00 ,  A61B6/51 ,  G06T7/60

CPC classification number: G06T11/005 ,  G06T7/60 ,  G06T11/006 ,  G06T11/008 ,  A61B6/51 ,  A61B6/5264 ,  G06T2207/10116 ,  G06T2207/20081 ,  G06T2207/30036 ,  G06T2211/424 ,  G06T2211/441

Abstract: Aspects relate to geometric calibration of a DVT imaging, by updating the geometric parameters used in a reconstruction method, in which the updating of the geometric parameters is supported by a first correction method based on machine learning (ML) by using the result of a first correction method as a reference for a second correction method for parameter estimation, and in which the second correction method for parameter estimation involves the measurement data of the DVT imaging, which includes the following steps: (S1) providing the measurement data of the DVT imaging and the geometric parameters; (S2) providing a first volume by applying a reconstruction method to the provided measurement data and the geometric parameters; (S3) providing a corrected volume by applying the first correction method to the first volume; (S4) providing updated geometric parameters by applying the second correction method to the measurement data and the corrected volume.

公开(公告)号：US20240320880A1

公开(公告)日：2024-09-26

申请号：US18578937

申请日：2022-07-05

Applicant: DENTSPLY SIRONA Inc. ,  SIRONA Dental Systems GmbH

Inventor： Ulrich SCHULZE-GANZLIN ,  Susanne MAUR ,  Markus HUELSBUSCH

IPC: G06T11/00 ,  G06T7/00

CPC classification number: G06T11/008 ,  G06T7/0012 ,  G06T2207/10072 ,  G06T2207/30036 ,  G06T2207/30168 ,  G06T2210/41 ,  G06T2211/424 ,  G06T2211/448

Abstract: Aspects relate to a method for reconstructing a digital volume tomography (DVT) imaging in the dental field including (S1) estimating the projection geometry from the sinogram of a patient imaging using motion artifact compensation (MAC); (S2) reconstructing a first volume using the estimated projection geometry; (S3) detecting the metal regions in the sinogram and in the first volume using the first volume and the estimated projection geometry; (S4) correcting the metal regions in the sinogram and generating a corrected sinogram; (S5) reconstructing a second volume with the estimated projection geometry and the corrected sinogram; and (S6) correcting the metal regions in the second volume.