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    Mobile radiography calibration for tomosynthesis using epipolar data consistency
    23.
    发明授权
    Mobile radiography calibration for tomosynthesis using epipolar data consistency 有权

    公开(公告)号：US10722207B2

    公开(公告)日：2020-07-28

    申请号：US16372477

    申请日：2019-04-02

    Applicant: CARESTREAM HEALTH, INC.

    Inventor： Levon O. Vogelsang ,  Richard A. Simon ,  Lawrence A. Ray

    IPC: G01T1/166 ,  A61B6/00 ,  G06T7/00 ,  A61B6/02 ,  G06T11/00 ,  G16H30/40

    Abstract: A method for geometric calibration of a radiography apparatus acquires tomosynthesis projection images of patient anatomy from a detector and an x-ray source translated along a scan path. An epipolar geometry is calculated according to the relative position of the detector to the scan path by estimating a direction for epipolar lines that extend along an image plane that includes the detector. A region of interest of the patient anatomy that is a portion of each projection image and is fully included within each projection image in the series is defined. A consistency metric is calculated for estimated epipolar lines extending within the ROI. The method iteratively adjusts the epipolar line estimation until the consistency metric indicates accuracy to within a predetermined threshold. A portion of a tomosynthesis volume is reconstructed and displayed.

    Iterative volume image reconstruction using synthetic projection images
    25.
    发明授权
    Iterative volume image reconstruction using synthetic projection images 有权

    公开(公告)号：US10307114B1

    公开(公告)日：2019-06-04

    申请号：US15974812

    申请日：2018-05-09

    Applicant: CARESTREAM HEALTH, INC.

    Inventor： Lawrence A. Ray ,  Richard A. Simon ,  Levon O. Vogelsang

    IPC: G06K9/00 ,  A61B6/03 ,  G06T11/00 ,  A61B6/00

    Abstract: A method for imaging a subject obtains a first set of acquired projection images of a subject volume, wherein each projection image in the first set has a corresponding acquisition angle and forms an initial reconstructed volume image. A second set of synthetic projection images is generated according to processing of the acquired projection images and combined with the first set to form a combined set of projection images. The method augments the initial reconstructed image to form an improved reconstructed image by at least a first iteration of an iterative reconstruction process using the initial reconstructed image with the combined set of acquired and synthetic projection images and at least a subsequent iteration of the iterative reconstruction process using the first set of acquired projection images and fewer than, or none of, the second set of synthetic projection images. The improved reconstruction image is rendered on a display.

    VOLUME IMAGE RECONSTRUCTION USING PROJECTION DECOMPOSITION
    26.
    发明申请
    VOLUME IMAGE RECONSTRUCTION USING PROJECTION DECOMPOSITION 审中-公开

    公开(公告)号：US20180286087A1

    公开(公告)日：2018-10-04

    申请号：US15472613

    申请日：2017-03-29

    Applicant: Carestream Health, Inc.

    Inventor： Lawrence A. Ray ,  Richard A. Simon ,  Levon O. Vogelsang

    IPC: G06T11/00 ,  G06T5/00

    Abstract: A method for forming an image reconstructs a volume image according to X-ray projection images acquired at acquisition angles. The full volume image is partitioned to form at least a first and a second non-overlapping sub-volume. Within each sub-volume, forward projection images for the sub-volume are calculated, with the corresponding forward projection images computed at the acquisition angles, and with intermediate forward projection images at angles between the acquisition angles. A weight factor relates the contribution of each pixel in the X-ray projection images to each sub-volume at each acquisition angle. Synthesized sub-volume projection images are formed according to the calculated weight factors and acquired projection images in each sub-volume. Synthesized sub-volume projection images form synthesized projection images for the full volume image. A second volume image is reconstructed according to the acquired X-ray projection images and the synthesized projection images. The reconstructed second volume image is displayed, stored, or transmitted.

    Method for teeth segmentation and alignment detection in CBCT volume
    28.
    发明授权
    Method for teeth segmentation and alignment detection in CBCT volume 有权
    CBCT体积中牙齿分割和取向检测方法

    公开(公告)号：US09129363B2

    公开(公告)日：2015-09-08

    申请号：US13949281

    申请日：2013-07-24

    Applicant: Carestream Health, Inc.

    Inventor： Shoupu Chen ,  Lawrence A. Ray

    IPC: G06K9/00 ,  G06T7/00 ,  G06K9/34

    CPC classification number: A61B6/14 ,  A61B6/032 ,  A61B6/4085 ,  A61B6/463 ,  A61B6/5217 ,  A61C7/002 ,  A61C2007/004 ,  G06K9/34 ,  G06T7/0012 ,  G06T7/12 ,  G06T7/149 ,  G06T2207/10081 ,  G06T2207/20096 ,  G06T2207/30036

    Abstract: A method of automatic tooth segmentation, the method executed at least in part on a computer system acquires volume image data for either or both upper and lower jaw regions of a patient and identifies image content for a specified jaw from the acquired volume image data. For the specified jaw, the method estimates average tooth height for teeth within the specified jaw, finds a jaw arch region, detects one or more separation curves between teeth in the jaw arch region, defines an individual tooth sub volume according to the estimated average tooth height and the detected separation curves, segments at least one tooth from within the defined sub-volume, and displays the at least one segmented tooth.

    Abstract translation: 一种自动齿分割方法，至少部分地在计算机系统上执行的方法获取患者的上下颌区域中的任一者或两者的体积图像数据，并从所获取的体积图像数据识别用于指定颌部的图像内容。 对于指定的钳口，该方法估计指定钳口内的牙齿的平均牙齿高度，找到颚弓区域，检测颚弓区域中的牙齿之间的一个或多个分离曲线，根据估计的平均牙齿限定单个牙齿体积 高度和检测到的分离曲线，从限定的子体积内划分至少一个牙齿，并且显示所述至少一个分割的牙齿。

    METHOD AND SYSTEM FOR USER INTERACTION IN 3-D CEPHALOMETRIC ANALYSIS
    29.
    发明申请
    METHOD AND SYSTEM FOR USER INTERACTION IN 3-D CEPHALOMETRIC ANALYSIS 有权
    3-D CEPHALOMETRIC分析中用户交互的方法和系统

    公开(公告)号：US20140348405A1

    公开(公告)日：2014-11-27

    申请号：US13945941

    申请日：2013-07-19

    Applicant: Carestream Health, Inc.

    Inventor： Shoupu Chen ,  Jean-Marc Inglese ,  Lawrence A. Ray ,  Jacques Treil

    IPC: G06T7/00

    CPC classification number: A61C7/002 ,  G06T7/60 ,  G06T7/75 ,  G06T2207/10081 ,  G06T2207/20101 ,  G06T2207/30016 ,  G06T2207/30036

    Abstract: A method for 3-D cephalometric analysis acquires reconstructed volume image data from a computed tomographic scan of a patient's head. The acquired volume image data simultaneously displays from at least a first 2-D view and a second 2-D view. For an anatomical feature of the head, an operator instruction positions a reference mark corresponding to the feature on either the first or the second displayed 2-D view and the reference mark displays on each of the at least first and second displayed 2-D views. In at least the first and second displayed 2-D views, one or more connecting lines display between two or more of the positioned reference marks. One or more cephalometric parameters are derived according to the positioned reference marks, the derived parameters are displayed.

    Abstract translation: 用于3-D头颅分析的方法从患者头部的计算机断层扫描获取重建的体积图像数据。 所获取的卷图像数据从至少第一2-D视图和第二2-D视图同时显示。 对于头部的解剖特征，操作者指令将对应于特征的参考标记定位在第一或第二显示的2-D视图上，并且在至少第一和第二显示的2-D视图中的每一个上显示参考标记 。 在至少第一和第二显示的2-D视图中，一个或多个连接线在两个或更多个定位的参考标记之间显示。 根据定位的参考标记导出一个或多个头颅参数，显示导出的参数。

    DENTAL SHADE MAPPING
    30.
    发明申请
    DENTAL SHADE MAPPING 有权
    牙齿阴影映射

    公开(公告)号：US20140030670A1

    公开(公告)日：2014-01-30

    申请号：US14040776

    申请日：2013-09-30

    Applicant: Carestream Health, Inc.

    Inventor： Victor C. Wong ,  James R. Milch ,  Lawrence A. Ray ,  Peter D. Burns

    IPC: A61B1/24 ,  A61B1/04 ,  A61B1/06 ,  A61B1/00

    CPC classification number: A61B1/24 ,  A61B1/00006 ,  A61B1/00009 ,  A61B1/04 ,  A61B1/0638 ,  G01J3/46 ,  G01J3/462 ,  G01J3/465 ,  G01J3/50 ,  G01J3/501 ,  G01J3/508 ,  G01J3/524

    Abstract: A method and apparatus for generating a color mapping for a dental object. The method includes generating a transformation matrix according to a set of spectral reflectance data for a statistically valid sampling of teeth. Illumination is directed toward the dental object over at least a first, a second, and a third wavelength band, one wavelength band at a time. For each of a plurality of pixels in an imaging array, an image data value is obtained, corresponding to each of the at least first, second, and third wavelength bands. The transformation matrix is applied to form the color mapping by generating a set of visual color values for each of the plurality of pixels according to the obtained image data values and according to image data values obtained from a reference object at the at least first, second, and third wavelength bands. The color mapping can be stored in an electronic memory.

    Abstract translation: 一种用于产生牙科物体的颜色映射的方法和装置。 该方法包括根据用于统计学上有效的牙齿取样的一组光谱反射率数据产生变换矩阵。 通过至少第一，第二和第三波长带，一次一个波长带照射朝向牙科物体。 对于成像阵列中的多个像素中的每一个，获得对应于至少第一，第二和第三波长带中的每一个的图像数据值。 应用变换矩阵以通过根据所获得的图像数据值生成一组视觉颜色值以形成颜色映射，并且根据从至少第一，第二的参考对象获得的图像数据值 和第三波长带。 颜色映射可以存储在电子存储器中。

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