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    Method and device for creating a cephalometric image
    3.
    发明授权
    Method and device for creating a cephalometric image 有权

    公开(公告)号：US11903748B2

    公开(公告)日：2024-02-20

    申请号：US17203201

    申请日：2021-03-16

    Applicant: CARESTREAM DENTAL LLC

    Inventor： Anna-Sesilia Vlachomitrou ,  Vincent Loustauneau ,  Michael D. Heath ,  Jean-Marc Inglese

    IPC: A61B6/02 ,  A61B6/14 ,  A61B6/00

    CPC classification number: A61B6/025 ,  A61B6/14 ,  A61B6/5205

    Abstract: Extra-oral dental method and/or apparatus embodiments according to this application can generate cephalometric imaged by digital tomosynthesis. An extra-oral dental imaging system embodiment for creating a cephalometric image of at least part of a human skull can include an X-ray source, an imaging device suitable for producing multiple frames during at least part of an exposure; a memory for registering and/or storing said multiple frames; and a manipulator for displacing the imaging device along an exposure profile between multiple frames during said at least part of the exposure of said object. The imaging device has an active area having a long dimension m and a short dimension n, wherein the aspect ratio m:n is strictly inferior to 1.5.

    HIGH-SPEED, DENTAL OPTICAL COHERENCE TOMOGRAPHY SYSTEM
    5.
    发明申请
    HIGH-SPEED, DENTAL OPTICAL COHERENCE TOMOGRAPHY SYSTEM 有权

    公开(公告)号：US20220133446A1

    公开(公告)日：2022-05-05

    申请号：US17431754

    申请日：2020-03-12

    Applicant: CARESTREAM DENTAL LLC

    Inventor： Xiaodong TAO ,  Victor C. WONG ,  Chuanhmao FAN

    IPC: A61C9/00 ,  A61B5/00 ,  A61B5/103 ,  G01B9/02091 ,  G01B9/02015 ,  G06T11/00

    Abstract: A dental optical coherence tomography system for scanning a sample has a swept source laser configured to generate output light having a range of wavelengths. Two or more optical channels each provide a reference and sample path for the output light, wherein each optical channel has a corresponding detector to provide an output signal according to combined light from the sample and reference, wherein the detector output signal characterizes back-reflected or back-scattered light from the sample path over a range of depths below a surface. A scanning reflector simultaneously directs sample path output light from each of the two or more channels toward the sample surface and directs returned light from the sample to the corresponding sample path and detector. A processor is in signal communication with the detector for each optical channel and that is configured to record and store results from the output signals received from each detector.

    METHODS FOR CALIBRATING A SPECTRAL X-RAY IMAGING SYSTEM TO PERFORM MATERIAL DECOMPOSITION
    6.
    发明申请
    METHODS FOR CALIBRATING A SPECTRAL X-RAY IMAGING SYSTEM TO PERFORM MATERIAL DECOMPOSITION 有权

    公开(公告)号：US20220061794A1

    公开(公告)日：2022-03-03

    申请号：US17419088

    申请日：2019-12-27

    Applicant: CARESTREAM DENTAL LLC

    Inventor： Jay S. SCHILDKRAUT ,  Jean-Marc INGLESE ,  Krishnamoorthy SUBRAMANYAN ,  Vincent LOUSTAUNEAU

    IPC: A61B6/00 ,  G01T1/169 ,  G01T1/36

    Abstract: The present disclosure describes methods for calibrating a spectral X-ray system to perform material decomposition with a single scan of an energy discriminating detector or with a single scan at each used X-ray spectrum. The methods may include material pathlengths exceeding the size of the volume reconstructable by the system. Example embodiments include physical and matching calibration phantoms. The physical calibration phantom is used to measure the attenuation of X-rays passing therethrough with all combinations of pathlengths through the calibration's basis materials. The matching digital calibration phantom is registered with the physical calibration phantom and is used to calculate the pathlength though each material for each measured attenuation value. A created data structure includes the X-ray attenuation for each X-ray spectrum or detector energy bin for all combinations of basis material pathlengths. The data structure is usable to perform a material decomposition on the X-ray projection of an imaged object.

    METHODS AND SYSTEM FOR AUTONOMOUS VOLUMETRIC DENTAL IMAGE SEGMENTATION
    7.
    发明申请
    METHODS AND SYSTEM FOR AUTONOMOUS VOLUMETRIC DENTAL IMAGE SEGMENTATION 有权

    公开(公告)号：US20220012888A1

    公开(公告)日：2022-01-13

    申请号：US17293849

    申请日：2019-11-14

    Applicant: CARESTREAM DENTAL LLC

    Inventor： Shoupu CHEN ,  Wei YE

    IPC: G06T7/11 ,  G06T7/12 ,  G06T7/00 ,  G06T5/30 ,  A61B6/14 ,  A61C7/00 ,  G16H30/40 ,  G16H50/20 ,  G16H30/20

    Abstract: The present disclosure describes a system and methods for autonomous segmentation of volumetric dental images, such as those produced by an imaging system, The methods, implemented by the system, acquire a volume image of a patient and extract a volume of interest comprising patient dentition from the acquired volume image. A first plane is extended through maxillary portions of the patients jaw and a second plane through mandibular portions of the patients jaw. A maxillary sub-volume is generated from the volume of interest according to the first plane and a mandibular sub-volume from the volume of interest according to the second plane. Maximum intensity projection images are formed for each sub-volume and teeth are delineated from these images. Teeth are segmented within each sub-volume according to the tooth delineation for their respective sub-volume.

    METHODS FOR METAL ARTIFACT REDUCTION IN CONE BEAM RECONSTRUCTION
    8.
    发明申请
    METHODS FOR METAL ARTIFACT REDUCTION IN CONE BEAM RECONSTRUCTION 审中-公开

    公开(公告)号：US20200151921A1

    公开(公告)日：2020-05-14

    申请号：US16682837

    申请日：2019-11-13

    Applicant: CARESTREAM DENTAL LLC

    Inventor： Jay S. SCHILDKRAUT

    IPC: G06T11/00 ,  G06K9/62

    Abstract: Methods for reconstruction of a volume radiographic image acquire 2-D projection images of a subject at a plurality of acquisition angles and generate an initial 3-D volume image formed of image voxels according to the acquired 2-D projection images. An initial 3-D reconstruction metal mask is formed from voxels that have attenuation to x-rays indicative of metal. At least one voxel is removed from the initial 3-D reconstruction metal mask to form a refined 3-D reconstruction metal mask according to a distribution of pixel values that contribute to the corresponding data value for the at least one voxel. One or more 2-D projection images are modified according to the distribution of pixel values. A refined 3-D volume image is generated according to the modified 2-D projection images. A rendering of the refined 3-D volume image displays that includes at least a portion of the refined 3-D reconstruction metal mask.

    CARBON NANOTUBE BASED COLD CATHODES FOR X-RAY GENERATION
    10.
    发明公开
    CARBON NANOTUBE BASED COLD CATHODES FOR X-RAY GENERATION 审中-公开

    公开(公告)号：US20240062984A1

    公开(公告)日：2024-02-22

    申请号：US17766718

    申请日：2020-10-16

    Applicant: CARESTREAM DENTAL LLC

    Inventor： Seshadri JAGANNATHAN ,  Lawrence D. FOLTS

    IPC: H01J35/06 ,  H01J9/02

    CPC classification number: H01J35/064 ,  H01J9/025 ,  H01J2209/0223

    Abstract: A cathode of an electron emitting device is described, where the cathode comprises a carbon nanotube (CNT); a nano-filler material; and a carbonizable polymer, and where the cathode exhibits increased hardness, is formed by high temperature thermal treatment, and is devoid of a substrate. Also described is a method of forming a cathode of an electron emitting device, where the method comprises a) forming a dispersed mixture comprising a carbon nanotube, a nano-filler material, and a carbonizable polymer in a solvent; b) coating and/or extruding the mixture; c) drying the coated and/or extruded mixture to remove at least a substantial portion of the solvent; and d) subjecting the dried mixture to a high temperature thermal treatment; where the method results in the cathode of an electron emitting device having increased hardness.

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