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    RECONSTRUCTION METHOD FOR DVT WITH MOTION ARTIFACT REDUCTION
    3.
    发明申请
    RECONSTRUCTION METHOD FOR DVT WITH MOTION ARTIFACT REDUCTION 有权

    公开(公告)号：US20240404130A1

    公开(公告)日：2024-12-05

    申请号：US18690934

    申请日：2022-09-13

    Applicant: DENTSPLY SIRONA Inc. ,  SIRONA DENTAL SYSTEM GMBH

    Inventor： Markus HÜLSBUSCH ,  Susanne MAUR

    IPC: G06T11/00

    Abstract: A computer-implemented method for reconstructing a dental DVT image, including: (S1) providing a sinogram acquired through an extraoral dental X-ray device during a rotation of at least 180 degrees around a patient's head and an initial projection geometry; (S2) geometry calibration through varying the projection geometry and evaluating the varied projection geometry using data consistency constraints derived from a first volume generated from the sinogram using the varied projection geometry in a first reconstruction method, the first reconstruction method using first reconstruction parameters; (S3) generating a final volume with a final reconstruction method using the varied projection geometry and final reconstruction parameters from the sinogram, the first reconstruction parameters of the first reconstruction method and the final reconstruction parameters of the final reconstruction method differing in at least one reconstruction parameter.

    METHOD AND SYSTEM FOR GENERATING DENTAL PANORAMIC IMAGES WITH SHARPENED DEPICTION OF CLINICALLY RELEVANT, PATIENT-SPECIFIC PRE-SELECTED ANATOMICAL STRUCTURES
    5.
    发明申请
    METHOD AND SYSTEM FOR GENERATING DENTAL PANORAMIC IMAGES WITH SHARPENED DEPICTION OF CLINICALLY RELEVANT, PATIENT-SPECIFIC PRE-SELECTED ANATOMICAL STRUCTURES 有权

    公开(公告)号：US20250029292A1

    公开(公告)日：2025-01-23

    申请号：US18714600

    申请日：2022-12-05

    Applicant: DENTSPLY SIRONA Inc.

    Inventor： Susanne MAUR ,  Tim BRAUN

    IPC: G06T11/00 ,  G06T7/00

    Abstract: Reconstructing a panoramic image of a patient's dental regions, including: providing at least one initial panoramic image reconstructed by using a plurality of projectional images of the patient and an initial layer including the mapping points corresponding to the patient's dental regions, to be sharply depicted in the initial panoramic image further including: detecting one or more clinically relevant patient-specific pre-selected anatomical structures in the initial panoramic; computing, using the anatomical data and the initial panoramic image, a new layer which includes the clinically relevant patient-specific pre-selected anatomical structure to provide a sharper depiction of the clinically relevant patient-specific pre-selected anatomical structures in a new panoramic image to be reconstructed compared to the depiction of the clinically relevant patient-specific pre-selected anatomical structure in the initial panoramic image; and reconstructing the new panoramic image using the plurality of projectional images of the patient and the computed new layer.

    APPARATUS AND METHOD FOR THE GENERATION OF DENTAL IMAGES WITH HEIGHT-SPECIFIC DOSE APPLICATION
    6.
    发明申请
    APPARATUS AND METHOD FOR THE GENERATION OF DENTAL IMAGES WITH HEIGHT-SPECIFIC DOSE APPLICATION 有权

    公开(公告)号：US20250017546A1

    公开(公告)日：2025-01-16

    申请号：US18712547

    申请日：2022-11-23

    Applicant: DENTSPLY SIRONA Inc.

    Inventor： Susanne MAUR ,  Stefan EICHNER

    IPC: A61B6/51 ,  A61B6/40

    Abstract: An extraoral dental X-ray apparatus for imaging of a patient in the dental region including: a radiator array having at least two individual radiators each for emitting X-rays, and offset at least along a predetermined direction (z); and an X-ray detector for at least partially detecting the X-rays emitted by the individual radiators, the radiator array and the X-ray detector being rotatably arranged about an axis parallel to said predetermined direction, further including a control device for separately controlling the individual radiators, the control device being configured such that the emitted X-rays of the at least two individual radiators differ in intensity and/or spectral distribution of the X-rays to effect an intensity and/or spectral distribution which can be varied along the predetermined direction. The control device can adaptively adapt the intensity and/or spectral distribution to the anatomy of the patient.

    IMPROVED MOTION ARTIFACT COMPENSATION THROUGH METAL ARTIFACT REDUCTION
    7.
    发明申请
    IMPROVED MOTION ARTIFACT COMPENSATION THROUGH METAL ARTIFACT REDUCTION 有权

    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.

    METHOD OF CALIBRATING X-RAY PROJECTION GEOMETRY IN X-RAY CONE BEAM COMPUTED TOMOGRAPHY
    8.
    发明申请
    METHOD OF CALIBRATING X-RAY PROJECTION GEOMETRY IN X-RAY CONE BEAM COMPUTED TOMOGRAPHY 有权

    公开(公告)号：US20220160323A1

    公开(公告)日：2022-05-26

    申请号：US17602306

    申请日：2020-04-17

    Applicant: DENTSPLY SIRONA Inc.

    Inventor： Susanne MAUR ,  Stefan WUNDRAK

    IPC: A61B6/00 ,  A61B6/03 ,  A61B6/14 ,  G06T11/00

    Abstract: The resent invention relates to a method of x-ray projection geometry calibration in x-ray cone beam computed tomography, the method comprising: at least one step (S1) of obtaining two-dimensional x-ray images (1) or a sinogram (2) of at least a part of an object (3), generated through relatively rotating around the object (3) a detector and an x-ray source projecting x-rays towards the detector; characterized by further comprising: at least one step (S4) of detecting in the two dimensional x-ray images (1) or the sinogram (2) at least one feature (3a) of the object (3) by using a trained artificial intelligence algorithm; and at least one step (S5) of creating, based on the detection, calibration information which defines the geometry of the x-ray projection.

    METHOD AND APPARATUS FOR GENERATING A 2D PANORAMIC IMAGE
    9.
    发明申请
    METHOD AND APPARATUS FOR GENERATING A 2D PANORAMIC IMAGE 有权

    公开(公告)号：US20220022827A1

    公开(公告)日：2022-01-27

    申请号：US17424951

    申请日：2020-01-23

    Applicant: DENTSPLY SIRONA inc.

    Inventor： Susanne MAUR ,  Stefan EICHNER

    IPC: A61B6/14 ,  A61B6/00 ,  G06T3/40 ,  G06T7/73

    Abstract: The present invention proposes a method for producing 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; G) derivation of the 2D panoramic image from the recalculated image; and H) outputting the 2D panoramic image.

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