Dentsply Sirona Inc.

Sirona Dental Systems Gmbh

Michael Elvers

Stefan Eichner

Kai Stannigel

Ulrich Schulze-Ganzlin

Wolf Blecher

Christina Sarti

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.

X-ray imaging method and system for reducing overlapping of neighboring teeth in panoramic images

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

Method of metal artefact reduction in x-ray dental volume tomography

A method for generating a panoramic layer image of an object to be imaged, by employing a 2D panoramic X-ray device, the object being imaged by projecting X-rays generated by an X-ray source through the object in a projection direction and recording the X-rays with an X-ray detector. Several 2D X-ray projection images are continuously recorded from various imaging directions while the X-ray source and the X-ray detector move around the object. At least one panoramic layer image is calculated from the recorded 2D X-ray projection images using a reconstruction method. The panoramic layer image is calculated by selecting and employing at least one partial area from at least two 2D X-ray projection images in relation to an active sensor area.

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Darmstadt, Germany

Michael Elvers