Methods and apparatus for scatter correction for CBCT system and cone-beam image reconstruction
    1.
    发明授权
    Methods and apparatus for scatter correction for CBCT system and cone-beam image reconstruction 有权
    用于CBCT系统和锥束图像重建的散射校正的方法和装置

    公开(公告)号:US08818065B2

    公开(公告)日:2014-08-26

    申请号:US13537226

    申请日:2012-06-29

    IPC分类号: G06K9/00

    摘要: 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 image data for 2-D projection images over a range of scan angles. For each of the plurality of projection images, an enhanced projection image can be generated. In one embodiment, a first scatter intensity distribution through the plurality of projection images can be modulated based on a first scaling function and a SPR to generate a second scatter intensity distribution through the plurality of projection images, which can be combined with the original plurality of projection images.

    摘要翻译: 至少部分地在与数字放射线照相设备一起使用的计算机上执行的对象的3-D体积图像重建的方法和/或装置的实施例可以在扫描角度范围内获得用于2-D投影图像的图像数据 。 对于多个投影图像中的每一个,可以生成增强的投影图像。 在一个实施例中,可以基于第一缩放函数和SPR来调制通过多个投影图像的第一散射强度分布,以通过多个投影图像生成第二散射强度分布,所述第二散射强度分布可以与原始多个 投影图像。

    METHODS AND APPARATUS FOR SCATTER CORRECTION FOR CBCT SYSTEM AND CONE-BEAM IMAGE RECONSTRUCTION
    2.
    发明申请
    METHODS AND APPARATUS FOR SCATTER CORRECTION FOR CBCT SYSTEM AND CONE-BEAM IMAGE RECONSTRUCTION 有权
    用于CBCT系统和球面图像重建的散射校正的方法和装置

    公开(公告)号:US20130004042A1

    公开(公告)日:2013-01-03

    申请号:US13537226

    申请日:2012-06-29

    IPC分类号: G06K9/00

    摘要: 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 image data for 2-D projection images over a range of scan angles. For each of the plurality of projection images, an enhanced projection image can be generated. In one embodiment, a first scatter intensity distribution through the plurality of projection images can be modulated based on a first scaling function and a SPR to generate a second scatter intensity distribution through the plurality of projection images, which can be combined with the original plurality of projection images.

    摘要翻译: 至少部分地在与数字放射线照相设备一起使用的计算机上执行的对象的3-D体积图像重建的方法和/或装置的实施例可以在扫描角度范围内获得用于2-D投影图像的图像数据 。 对于多个投影图像中的每一个,可以生成增强的投影图像。 在一个实施例中,可以基于第一缩放函数和SPR来调制通过多个投影图像的第一散射强度分布,以通过多个投影图像生成第二散射强度分布,所述第二散射强度分布可以与原始多个 投影图像。

    NOISE SUPPRESSION FOR CONE-BEAM IMAGE RECONSTRUCTION
    3.
    发明申请
    NOISE SUPPRESSION FOR CONE-BEAM IMAGE RECONSTRUCTION 审中-公开
    噪声图像重建的噪声抑制

    公开(公告)号:US20120019512A1

    公开(公告)日:2012-01-26

    申请号:US12841363

    申请日:2010-07-22

    IPC分类号: G06T15/00 G06K9/00

    CPC分类号: G06T11/005

    摘要: A method for 3-D volume image reconstruction of a subject, executed at least in part on a computer, obtains image data for 2-D projection images over a range of scan angles. For each of the plurality of projection images, a noise-corrected projection image is generated by steps of transforming the image data according to a variance-stabilizing transform to provide transformed image data, applying Gaussian based noise suppression to the transformed image data, and inverting the transformation of the noise-suppressed transformed image data to generate the noise-corrected projection image. The noise-corrected projection image is stored in a computer-accessible memory.

    摘要翻译: 至少部分地在计算机上执行的被摄体的3-D体积图像重建方法在扫描角度范围内获得2-D投影图像的图像数据。 对于多个投影图像中的每一个,通过根据方差稳定化变换来转换图像数据的步骤来生成经噪声校正的投影图像,以提供变换图像数据,对经变换的图像数据应用基于高斯的噪声抑制,以及反转 噪声抑制变换图像数据的变换,以产生经噪声校正的投影图像。 经噪声校正的投影图像存储在计算机可访问存储器中。

    Methods and apparatus for texture based filter fusion for CBCT system and cone-beam image reconstruction
    4.
    发明授权
    Methods and apparatus for texture based filter fusion for CBCT system and cone-beam image reconstruction 有权
    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

    公开(公告)号:US08855394B2

    公开(公告)日:2014-10-07

    申请号:US13537205

    申请日:2012-06-29

    IPC分类号: G06K9/40 G06T11/00

    摘要: 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.

    摘要翻译: 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。

    Projection truncation processing for CBCT
    5.
    发明授权
    Projection truncation processing for CBCT 有权
    CBCT的投影截断处理

    公开(公告)号:US08620052B2

    公开(公告)日:2013-12-31

    申请号:US12821405

    申请日:2010-06-23

    IPC分类号: G06K9/00

    CPC分类号: G06T11/005 G06T2211/432

    摘要: 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.

    摘要翻译: 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。

    METHODS AND APPARATUS FOR TEXTURE BASED FILTER FUSION FOR CBCT SYSTEM AND CONE-BEAM IMAGE RECONSTRUCTION
    6.
    发明申请
    METHODS AND APPARATUS FOR TEXTURE BASED FILTER FUSION FOR CBCT SYSTEM AND CONE-BEAM IMAGE RECONSTRUCTION 有权
    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

    公开(公告)号:US20130004041A1

    公开(公告)日:2013-01-03

    申请号:US13537205

    申请日:2012-06-29

    IPC分类号: G06K9/40

    摘要: 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.

    摘要翻译: 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。

    Metal artifacts reduction for cone beam CT
    7.
    发明授权
    Metal artifacts reduction for cone beam CT 有权
    锥束CT金属假象减少

    公开(公告)号:US09202296B2

    公开(公告)日:2015-12-01

    申请号:US13234472

    申请日:2011-09-16

    摘要: 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.

    摘要翻译: 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。

    METAL ARTIFACTS REDUCTION FOR CONE BEAM CT
    8.
    发明申请
    METAL ARTIFACTS REDUCTION FOR CONE BEAM CT 有权
    锥形CT的金属制品减少

    公开(公告)号:US20130070991A1

    公开(公告)日:2013-03-21

    申请号:US13234472

    申请日:2011-09-16

    IPC分类号: G06K9/00

    摘要: 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.

    摘要翻译: 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。

    PROJECTION TRUNCATION PROCESSING FOR CBCT
    9.
    发明申请
    PROJECTION TRUNCATION PROCESSING FOR CBCT 有权
    CBCT投影截断处理

    公开(公告)号:US20110317894A1

    公开(公告)日:2011-12-29

    申请号:US12821405

    申请日:2010-06-23

    IPC分类号: G06K9/00

    CPC分类号: G06T11/005 G06T2211/432

    摘要: 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.

    摘要翻译: 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。

    Automatic tone scale adjustment using image activity measures
    10.
    发明授权
    Automatic tone scale adjustment using image activity measures 失效
    使用图像活动度量进行自动色调调整

    公开(公告)号:US5633511A

    公开(公告)日:1997-05-27

    申请号:US577756

    申请日:1995-12-22

    摘要: A method of automatically adjusting the tone scale adjustment for digital radiographic images. The method includes the steps of providing an input digital radiographic image; estimating the image noise as a function of code value of the image; determining the range of code values in the input image; determining which way the input image should be processed; determining a bounding box which contains the region of interest of the input image; computing the image activity histogram of the input image; determining four points from the image activity histogram; constructing the tone-scale curve for the input image; and mapping the input image through the tone-scale curve to produce an output image with good tone scale.

    摘要翻译: 一种自动调整数字放射照相图像色阶调整的方法。 该方法包括提供输入数字放射照相图像的步骤; 估计图像噪声作为图像的代码值的函数; 确定输入图像中的代码值的范围; 确定输入图像的处理方式; 确定包含输入图像的感兴趣区域的边界框; 计算输入图像的图像活动直方图; 从图像活动直方图确定四个点; 构建输入图像的色阶曲线; 并通过色阶曲线映射输入图像以产生具有良好色阶的输出图像。