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    • 1. 发明授权
    • Metal artifacts reduction for cone beam CT
    • 锥束CT金属假象减少
    • US09202296B2
    • 2015-12-01
    • US13234472
    • 2011-09-16
    • Dong YangRobert A. Senn
    • Dong YangRobert A. Senn
    • G06K9/00G06T11/00G06F3/00A61B6/00
    • G06T11/008A61B6/5258G06F3/00G06K9/00221G06K9/00335G06K9/00389
    • A method for suppressing metal artifacts in a radiographic image, the method executed at least in part on a computer, obtains at least one two-dimensional radiographic image of a subject, wherein the subject has one or more metal objects and identifies a material that forms the one or more metal objects and a radiation energy level used to generate the obtained image. The obtained radiographic image is segmented to identify boundaries of the metal object. A conditioned radiographic image is formed by replacing pixel values in the radiographic image that correspond to the one or more metal objects with compensating pixel values according to the identified material and the identified radiation energy level. The conditioned radiographic image is then displayed.
    • 一种用于抑制放射线照相图像中的金属伪影的方法,所述方法至少部分地在计算机上执行,获得被摄体的至少一个二维放射照相图像,其中所述对象具有一个或多个金属物体,并且识别形成 一个或多个金属物体和用于产生所获得的图像的辐射能级。 所获得的放射线照相图像被分割以识别金属物体的边界。 通过根据所识别的材料和识别的辐射能量水平,通过用与补偿像素值对应的一个或多个金属物体的放射线照相图像中的像素值替换条件放射线照相图像。 然后显示条件放射照相图像。
    • 2. 发明申请
    • METAL ARTIFACTS REDUCTION FOR CONE BEAM CT
    • 锥形CT的金属制品减少
    • US20130070991A1
    • 2013-03-21
    • US13234472
    • 2011-09-16
    • Dong YangRobert A. Senn
    • Dong YangRobert A. Senn
    • G06K9/00
    • G06T11/008A61B6/5258G06F3/00G06K9/00221G06K9/00335G06K9/00389
    • A method for suppressing metal artifacts in a radiographic image, the method executed at least in part on a computer, obtains at least one two-dimensional radiographic image of a subject, wherein the subject has one or more metal objects and identifies a material that forms the one or more metal objects and a radiation energy level used to generate the obtained image. The obtained radiographic image is segmented to identify boundaries of the metal object. A conditioned radiographic image is formed by replacing pixel values in the radiographic image that correspond to the one or more metal objects with compensating pixel values according to the identified material and the identified radiation energy level. The conditioned radiographic image is then displayed.
    • 一种用于抑制放射线照相图像中的金属伪影的方法,所述方法至少部分地在计算机上执行,获得被摄体的至少一个二维放射照相图像,其中所述对象具有一个或多个金属物体,并且识别形成 一个或多个金属物体和用于产生所获得的图像的辐射能级。 所获得的放射线照相图像被分割以识别金属物体的边界。 通过根据所识别的材料和识别的辐射能量水平,通过用与补偿像素值对应的一个或多个金属物体的放射线照相图像中的像素值替换条件放射线照相图像。 然后显示条件放射照相图像。
    • 4. 发明申请
    • PROJECTION TRUNCATION PROCESSING FOR CBCT
    • CBCT投影截断处理
    • US20110317894A1
    • 2011-12-29
    • US12821405
    • 2010-06-23
    • Dong YangRobert A. Senn
    • Dong YangRobert A. Senn
    • G06K9/00
    • G06T11/005G06T2211/432
    • A method for 3-D volume image reconstruction of a subject. 2-D projection images are obtained over a range of scan angles, and one or more truncated images are identified from the obtained images. From each of the one or more truncated images, a corrected truncated image is formed by a repeated process of identifying a row of image data values in the one or more truncated images, assigning an extension length to one or both ends of the row according to the row location in the truncated image, and extending the truncated image data for the row of image data values by applying a row-dependent cosine function to each value in the extension length. A 3-D volume image is reconstructed using one or more of the corrected truncated images.
    • 一种用于3-D体积图像重建的方法。 在扫描角度的范围内获得2-D投影图像,并且从所获得的图像中识别一个或多个截断的图像。 从一个或多个截断的图像中的每一个中,通过识别一个或多个截断的图像中的一行图像数据值的重复处理形成校正的截断图像,根据该截断图像向该行的一端或两端分配延伸长度 在截断的图像中的行位置,并且通过对延伸长度中的每个值应用行依赖余弦函数来扩展图像数据值行的截断的图像数据。 使用一个或多个校正的截断图像重建3-D体积图像。
    • 5. 发明授权
    • Methods and apparatus for texture based filter fusion for CBCT system and cone-beam image reconstruction
    • 用于CBCT系统和锥束图像重建的基于纹理的滤波器融合的方法和装置
    • US08855394B2
    • 2014-10-07
    • US13537205
    • 2012-06-29
    • Dong YangRobert A. Senn
    • Dong YangRobert A. Senn
    • G06K9/40G06T11/00
    • G06K9/40G06T11/003G06T11/006G06T2211/421
    • Embodiments of methods and/or apparatus for 3-D volume image reconstruction of a subject, executed at least in part on a computer for use with a digital radiographic apparatus can obtain a 3D volume reconstruction or projection image by generating a first-filtered set of projection images from a plurality of 2-D projection images taken over a range of scan angles and a different second-filtered set of projection images from the plurality of 2-D projection images. Then, for example, a first 3-D volume image of the subject from the first-filtered set of projection images and a second 3-D volume image of the subject from the second-filtered set of projection images can be combined using different weighting combinations in at least two corresponding portions to generate the 3-D volume image of the subject.
    • 至少部分地在与数字放射照相设备一起使用的计算机上执行的被摄体的3-D体积图像重建的方法和/或装置的实施例可以通过生成第一滤波集合来获得3D体积重建或投影图像 来自多个2-D投影图像的投影图像在多个扫描角度范围内拍摄,以及不同的第二滤波的投影图像集合来自多个2-D投影图像。 然后,例如,可以使用不同的加权来组合来自第一滤波的投影图像集合的被摄体的第一3-D体积图像和来自第二滤波的投影图像组的被摄体的第二3-D体积图像 在至少两个对应部分中的组合以产生受试者的3-D体积图像。
    • 6. 发明授权
    • Projection truncation processing for CBCT
    • CBCT的投影截断处理
    • US08620052B2
    • 2013-12-31
    • US12821405
    • 2010-06-23
    • Dong YangRobert A. Senn
    • Dong YangRobert A. Senn
    • G06K9/00
    • G06T11/005G06T2211/432
    • A method for 3-D volume image reconstruction of a subject. 2-D projection images are obtained over a range of scan angles, and one or more truncated images are identified from the obtained images. From each of the one or more truncated images, a corrected truncated image is formed by a repeated process of identifying a row of image data values in the one or more truncated images, assigning an extension length to one or both ends of the row according to the row location in the truncated image, and extending the truncated image data for the row of image data values by applying a row-dependent cosine function to each value in the extension length. A 3-D volume image is reconstructed using one or more of the corrected truncated images.
    • 一种用于3-D体积图像重建的方法。 在扫描角度的范围内获得2-D投影图像,并且从所获得的图像中识别一个或多个截断的图像。 从一个或多个截断的图像中的每一个中,通过识别一个或多个截断的图像中的一行图像数据值的重复处理形成校正的截断图像,根据该截断图像向该行的一端或两端分配延伸长度 在截断的图像中的行位置,并且通过对延伸长度中的每个值应用行依赖余弦函数来扩展图像数据值行的截断的图像数据。 使用一个或多个校正的截断图像重建3-D体积图像。
    • 7. 发明申请
    • METHODS AND APPARATUS FOR TEXTURE BASED FILTER FUSION FOR CBCT SYSTEM AND CONE-BEAM IMAGE RECONSTRUCTION
    • 用于CBCT系统和CONE-BEAM图像重构的基于纹理滤波器熔融的方法和装置
    • US20130004041A1
    • 2013-01-03
    • US13537205
    • 2012-06-29
    • Dong YangRobert A. Senn
    • Dong YangRobert A. Senn
    • G06K9/40
    • G06K9/40G06T11/003G06T11/006G06T2211/421
    • Embodiments of methods and/or apparatus for 3-D volume image reconstruction of a subject, executed at least in part on a computer for use with a digital radiographic apparatus can obtain a 3D volume reconstruction or projection image by generating a first-filtered set of projection images from a plurality of 2-D projection images taken over a range of scan angles and a different second-filtered set of projection images from the plurality of 2-D projection images. Then, for example, a first 3-D volume image of the subject from the first-filtered set of projection images and a second 3-D volume image of the subject from the second-filtered set of projection images can be combined using different weighting combinations in at least two corresponding portions to generate the 3-D volume image of the subject.
    • 至少部分地在与数字放射照相设备一起使用的计算机上执行的被摄体的3-D体积图像重建的方法和/或装置的实施例可以通过生成第一滤波集合来获得3D体积重建或投影图像 来自多个2-D投影图像的投影图像在多个扫描角度范围内拍摄,以及不同的第二滤波的投影图像集合来自多个2-D投影图像。 然后,例如,可以使用不同的加权来组合来自第一滤波的投影图像集合的被摄体的第一3-D体积图像和来自第二滤波的投影图像组的被摄体的第二3-D体积图像 在至少两个对应部分中的组合以产生受试者的3-D体积图像。