Abstract: A method for generating a panoramic image with reduced overlapping of neighboring teeth, including: acquiring 2D x-ray images respectively at a different radiographic directions by a rotating an x-ray source and an x-ray detector around the jaw of a patient. It includes a step of identifying one or more regions each including at least one pair of overlapping neighboring teeth in the 2D x-ray images and/or in temporary panoramic images reconstructed from the 2D x-ray images for which an optimal radiographic directions are determined, among the corresponding radiographic directions, which reduces the overlap in the panoramic image to be reconstructed. It includes determining one or more optimal radiographic directions respectively among the corresponding radiographic directions of the 2D x-ray images for which one or more regions each including at least one pair of overlapping neighboring teeth has been identified, to reduce the overlaps in the panoramic image to be reconstructed.

Abstract: The present invention relates to a method of metal artefact reduction in x-ray dental volume tomography, the method comprising: a step (S1) of obtaining two-dimensional x-ray images (1) or a sinogram (2) of at least part (v) of a patient jaw (3a), acquired through relatively rotating an x-ray source (4) and a detector (5) around the patient jaw (3a); the method being characterized by further comprising: a step (S2) of detecting metal objects (6) in the two-dimensional x-ray images (1) or the sinogram (2) by using at least a trained artificial intelligence algorithm to generate 2D masks (7) which represent the metal objects (6) in the two-dimensional x-ray images (1) or 3D masks which represent the metal objects (6) in the sinogram (2), respectively; and a step (S4;S5) of reconstructing a three dimensional tomographic image (8) respectively based on two-dimensional x-ray images (1) or the sinogram (2) and the 2D masks (7) or the 3D masks as generated.

Abstract: The present invention relates to a method of metal artefact reduction in x-ray dental volume tomography, the method comprising: a step (S1) of obtaining two-dimensional x-ray images (1) or a sinogram (2) of at least part (v) of a patient jaw (3a), acquired through relatively rotating an x-ray source (4) and a detector (5) around the patient jaw (3a); the method being characterized by further comprising: a step (S2) of detecting metal objects (6) in the two-dimensional x-ray images (1) or the sinogram (2) by using at least a trained artificial intelligence algorithm to generate 2D masks (7) which represent the metal objects (6) in the two-dimensional x-ray images (1) or 3D masks which represent the metal objects (6) in the sinogram (2), respectively; and a step (S4; S5) of reconstructing a three dimensional tomographic image (8) respectively based on two-dimensional x-ray images (1) or the sinogram (2) and the 2D masks (7) or the 3D masks as generated.

Abstract: The present invention relates to a computer implemented method of overlapping a first digital 3D image (13) and a second digital 3D image (14) each showing the oral cavity, wherein the first digital 3D image (13) is obtained through optically scanning a surface of the oral cavity, and wherein the second digital 3D image (14) is obtained through X-ray imaging, magnetic resonance imaging, or acoustical imaging of the oral cavity. The method includes a first matching step (S100) and a second matching step (S200) following the first matching step (S100).

Abstract: A 3D X-ray device including an X-ray detector, an X-ray source and a computer. The X-ray detector and the X-ray source are moved about an object volume to be recorded on movement paths with a rotation of at least 185°. A number of X-ray projection images are recorded from different directions. X-rays irradiate the object volume in one of the irradiation directions and are captured by the detector. A 3D X-ray image of the object volume is calculated from the recorded X-ray projection images by a reconstruction method. The X-ray detector is arranged asymmetrically relative to a central axis through a center of rotation of the 3D X-ray device. A first fan beam and an opposite second fan beam rotated 180° form an overlap region. At least one X-ray filter is placed between the X-ray source and the object volume for attenuating an X-ray dose inside the overlap region.

Abstract: The present invention relates to a method for automatically generating a projection panoramic view (RPV) from a dental DVT volume of a patient, comprising the steps of; (S1) localizing dental relevant anatomical structures in the DVT volume by using a machine learning method; (S2) automatically placing a guide curve by optimizing it based on the position of the localized dental relevant anatomical structures; (S3) defining a projection region of the reprojection panoramic view using the placed guide curve without manual steps in the DVT volume so that the localized dental relevant anatomical structures are encompassed; (S4) creating the reprojection panoramic view by reprojecting the DVT volume in the defined projection region.

Abstract: The present invention relates to a method for automatically generating a reprojection panoramic view (RPV) from a dental DVT volume of a patient, which is aligned with the course of the mandibular canal, comprising the following steps; (S1) localization of the mandibular canal, (S2) automatic definition of a projection region of the RPV, which comprises the following sub steps: (S2.1) automatically setting a guide curve in a plane perpendicular to the patient longitudinal axis using the localized mandibular canal; (S2.2) automatically defining a variable or constant thickness profile along the guide curve; (S2.3) Extruding the area defined by guide curve and thickness profile along the patient longitudinal axis; and (S3) generating the RPV by reprojecting the DVT volume in the defined projection region.

Abstract: A method for generating a panoramic image with reduced overlapping of neighboring teeth, including: acquiring 2D x-ray images respectively at a different radiographic directions by a rotating an x-ray source and an x-ray detector around the jaw of a patient. It includes a step of identifying one or more regions each including at least one pair of overlapping neighboring teeth in the 2D x-ray images and/or in temporary panoramic images reconstructed from the 2D x-ray images for which an optimal radiographic directions are determined, among the corresponding radiographic directions, which reduces the overlap in the panoramic image to be reconstructed. It includes determining one or more optimal radiographic directions respectively among the corresponding radiographic directions of the 2D x-ray images for which one or more regions each including at least one pair of overlapping neighboring teeth has been identified, to reduce the overlaps in the panoramic image to be reconstructed.

Abstract: A 3D X-ray device including an X-ray detector, an X-ray source and a computer. The X-ray detector and the X-ray source are moved about an object volume to be recorded on movement paths with a rotation of at least 185°. A number of X-ray projection images are recorded from different directions. X-rays irradiate the object volume in one of the irradiation directions and are captured by the detector. A 3D X-ray image of the object volume is calculated from the recorded X-ray projection images by a reconstruction method. The X-ray detector is arranged asymmetrically relative to a central axis through a center of rotation of the 3D X-ray device. A first fan beam and an opposite second fan beam rotated 180° form an overlap region. At least one X-ray filter is placed between the X-ray source and the object volume for attenuating an X-ray dose inside the overlap region.

Abstract: The present invention relates to a method of metal artefact reduction in x-ray dental volume tomography, the method comprising: a step (S1) of obtaining two-dimensional x-ray images (1) or a sinogram (2) of at least part (v) of a patient jaw (3a), acquired through relatively rotating an x-ray source (4) and a detector (5) around the patient jaw (3a); the method being characterized by further comprising: a step (S2) of detecting metal objects (6) in the two-dimensional x-ray images (1) or the sinogram (2) by using at least a trained artificial intelligence algorithm to generate 2D masks (7) which represent the metal objects (6) in the two-dimensional x-ray images (1) or 3D masks which represent the metal objects (6) in the sinogram (2), respectively; and a step (S4; S5) of reconstructing a three dimensional tomographic image (8) respectively based on two-dimensional x-ray images (1) or the sinogram (2) and the 2D masks (7) or the 3D masks as generated.