Energy spectrum reconstruction
    1.
    发明授权
    Energy spectrum reconstruction 有权
    能谱重建

    公开(公告)号:US08000434B2

    公开(公告)日:2011-08-16

    申请号:US12373112

    申请日:2007-07-02

    IPC分类号: A61B6/00

    CPC分类号: G01T1/2985

    摘要: A computed tomography system includes an x-ray source (108) that rotates about and emits radiation through an imaging region (116). At least one finite energy resolution detector (112) detects the emitted radiation. The at least one finite resolution detector (112) includes a plurality of sub-detectors (204). Each of the plurality of sub-detectors (204) is associated with one or more different energy thresholds. Each of the energy thresholds is used to count a number of incident photons based on a corresponding energy level. A reconstruction system (136) reconstructs the photon counts to generate one or more images of a subject residing within the imaging region (116).

    摘要翻译: 计算机断层摄影系统包括绕着成像区域(116)旋转并发射辐射的x射线源(108)。 至少一个有限能量分辨率检测器(112)检测发射的辐射。 所述至少一个有限分辨率检测器(112)包括多个子检测器(204)。 多个子检测器(204)中的每一个与一个或多个不同的能量阈值相关联。 每个能量阈值用于根据相应的能级对一些入射光子进行计数。 重建系统(136)重建光子计数以产生驻留在成像区域(116)内的对象的一个​​或多个图像。

    STEREO TUBE COMPUTED TOMOGRAPHY
    2.
    发明申请
    STEREO TUBE COMPUTED TOMOGRAPHY 有权
    立体管计算机图像

    公开(公告)号:US20100002830A1

    公开(公告)日:2010-01-07

    申请号:US12375427

    申请日:2007-07-23

    IPC分类号: A61B6/00 G01T1/29

    摘要: A computed tomography system includes at least two x-ray sources (108), a at least one common detector (124), and a reconstruction system (136). The at least two x-ray sources (108) are aligned at different z-axis locations at about a same angular position and concurrently emit radiation that traverses an imaging region (116). The at least one detector (124) detects radiation emitted by the at least two x-ray source (108) and generates composite data indicative of the detected radiation. The reconstruction system (136) reconstructs the composite data to generate one or more images.

    摘要翻译: 计算机断层摄影系统包括至少两个x射线源(108),至少一个公共检测器(124)和重建系统(136)。 所述至少两个x射线源(108)在大致相同的角位置处在不同的z轴位置对准,并同时发射穿过成像区域(116)的辐射。 所述至少一个检测器(124)检测由所述至少两个X射线源(108)发射的辐射并产生指示检测到的辐射的复合数据。 重建系统(136)重建复合数据以生成一个或多个图像。

    IMAGE RECONSTRUCTION WITH VOXEL DEPENDENT INTERPOLATION
    3.
    发明申请
    IMAGE RECONSTRUCTION WITH VOXEL DEPENDENT INTERPOLATION 有权
    具有VOXEL依赖插值的图像重建

    公开(公告)号:US20090202036A1

    公开(公告)日:2009-08-13

    申请号:US11575902

    申请日:2005-09-22

    IPC分类号: H05G1/60 G06K9/00

    CPC分类号: G06T11/006

    摘要: A radiographic imaging apparatus includes a radiation detector (16) and a radiation source (12) which projects a non-parallel beam of radiation into field of view (14). A footprint of each voxel (v) which is projected on the detector (16) is corrected based on the position of the voxel (v) in the field of view (14) in relation to the radiation detector (16) and the radiation source (12). The contributions from substantially parallel redundant projections are further combined based on a fractional distance frac from a center point (82) of the voxel (v) to a center of each of the adjacent redundant projections.

    摘要翻译: 放射线照相成像装置包括辐射检测器(16)和辐射源(12),其将非平行辐射束投射到视场(14)中。 基于在视场(14)中相对于放射线检测器(16)的体素(v)的位置和辐射源(v)来校正投影在检测器(16)上的每个体素(v)的足迹 (12)。 基于从体素(v)的中心点(82)到每个相邻冗余投影的中心的分数距离压裂进一步组合基本上平行的冗余投影的贡献。

    Imaging method with back projection
    4.
    发明授权
    Imaging method with back projection 失效
    具有反投影的成像方法

    公开(公告)号:US07570731B2

    公开(公告)日:2009-08-04

    申请号:US11570896

    申请日:2005-06-24

    IPC分类号: A61B6/03

    摘要: The invention relates to an imaging method, especially a computerized tomography method, with which an object is penetrated by rays from different directions and measured values, which depend upon the intensity of the rays after penetrating the object, are acquired by a detector unit. From these measured values, an object image is reconstructed by means of back projection of measured-value-dependent back projection values. Therein, the object image is divided into overlapping, quasi-spherically symmetric image segments, each being defined by an image value and a quasi-spherically symmetric base function. Furthermore, during the back projection, the back projection values are added in proportions to the image values, wherein the proportion of a back projection value, which is added during the back projection to an image value, is dependent on a proportionality factor, which is equal to the average value of the line integrals of the base function belonging to the respective image value along those rays that have generated the measured value, on which the respective back projection value is dependent.

    摘要翻译: 本发明涉及一种成像方法,特别是计算机断层摄影方法,其中物体被来自不同方向的光线穿透,并且测量值取决于穿透物体之后的光线的强度,由检测器单元获取。 从这些测量值,通过背投影测量值依赖的反投影值重建对象图像。 其中,对象图像被划分为重叠的准球形对称图像片段,每个片段由图像值和准球形对称的基本功能定义。 此外,在背投影期间,反投影值以与图像值成比例的方式相加,其中在后投影中添加的反投影值与图像值的比例取决于比例因子,即比例因子 等于属于相应图像值的基本功能的线积分的平均值,沿着相应的背投影值依赖于已经产生测量值的那些射线。

    Method And Device For The Iterative Reconstruction Of Tomographic Ilmages
    5.
    发明申请
    Method And Device For The Iterative Reconstruction Of Tomographic Ilmages 有权
    沉积层析迭代重建方法与装置

    公开(公告)号:US20080205729A1

    公开(公告)日:2008-08-28

    申请号:US11908294

    申请日:2006-03-07

    IPC分类号: G06K9/00

    CPC分类号: G06T11/006 G06T2211/424

    摘要: The invention relates to a device and a method for the iterative reconstruction of the attenuation coefficients μj in a tomographic image of an object (1) from projection measurements mi. In the update equation for μjn during the n-th iteration the backprojected error (mi−mi−(μjn)) is weighted by a voxel dependent factor Formula (I). Such a voxel dependent update may particularly be included in the algorithms of ART or ML.

    摘要翻译: 本发明涉及一种用于从投射测量m 1 i中的对象(1)的断层图像中迭代重建衰减系数μn j i i的装置和方法。 在第n次迭代期间,对于mu n 的更新等式,反向投影的误差(m i) 通过体素依赖因子公式(I)加权 - (mu< j< n> n>))。 这种体素相关更新可以特别地包括在ART或ML的算法中。

    Stereo tube computed tomography
    6.
    发明授权
    Stereo tube computed tomography 有权
    立体管计算机断层扫描

    公开(公告)号:US07826585B2

    公开(公告)日:2010-11-02

    申请号:US12375427

    申请日:2007-07-23

    IPC分类号: G01N23/083 G01N23/087

    摘要: A computed tomography system includes at least two x-ray sources (108), a at least one common detector (124), and a reconstruction system (136). The at least two x-ray sources (108) are aligned at different z-axis locations at about a same angular position and concurrently emit radiation that traverses an imaging region (116). The at least one detector (124) detects radiation emitted by the at least two x-ray source (108) and generates composite data indicative of the detected radiation. The reconstruction system (136) reconstructs the composite data to generate one or more images.

    摘要翻译: 计算机断层摄影系统包括至少两个x射线源(108),至少一个公共检测器(124)和重建系统(136)。 所述至少两个x射线源(108)在大致相同的角位置处在不同的z轴位置对准,并同时发射穿过成像区域(116)的辐射。 所述至少一个检测器(124)检测由所述至少两个X射线源(108)发射的辐射并产生指示检测到的辐射的复合数据。 重建系统(136)重建复合数据以生成一个或多个图像。

    Imaging Method with Back Projection
    7.
    发明申请
    Imaging Method with Back Projection 失效
    具有反投影的成像方法

    公开(公告)号:US20080273655A1

    公开(公告)日:2008-11-06

    申请号:US11570896

    申请日:2005-06-24

    IPC分类号: A61B6/00 G06K9/00

    摘要: The invention relates to an imaging method, especially a computerized tomography method, with which an object is penetrated by rays from different directions and measured values, which depend upon the intensity of the rays after penetrating the object, are acquired by a detector unit. From these measured values, an object image is reconstructed by means of back projection of measured-value-dependent back projection values. Therein, the object image is divided into overlapping, quasi-spherically symmetric image segments, each being defined by an image value and a quasi-spherically symmetric base function. Furthermore, during the back projection, the back projection values are added in proportions to the image values, wherein the proportion of a back projection value, which is added during the back projection to an image value, is dependent on a proportionality factor, which is equal to the average value of the line integrals of the base function belonging to the respective image value along those rays that have generated the measured value, on which the respective back projection value is dependent.

    摘要翻译: 本发明涉及一种成像方法,特别是计算机断层摄影方法,其中物体被来自不同方向的光线穿透,并且测量值取决于穿透物体之后的光线的强度,由检测器单元获取。 从这些测量值,通过背投影测量值依赖的反投影值重建对象图像。 其中,对象图像被划分为重叠的准球形对称图像片段,每个片段由图像值和准球形对称的基本功能定义。 此外,在背投影期间,反投影值以与图像值成比例的方式相加,其中在后投影中添加的反投影值与图像值的比例取决于比例因子,即比例因子 等于属于相应图像值的基本功能的线积分的平均值,沿着相应的背投影值依赖于已经产生测量值的那些射线。

    Method and device for the iterative reconstruction of tomographic images
    8.
    发明授权
    Method and device for the iterative reconstruction of tomographic images 有权
    断层图像迭代重建的方法和装置

    公开(公告)号:US07970195B2

    公开(公告)日:2011-06-28

    申请号:US11908294

    申请日:2006-03-07

    IPC分类号: G06K9/00

    CPC分类号: G06T11/006 G06T2211/424

    摘要: The invention relates to a device and a method for the iterative reconstruction of the attenuation coefficients μj in a tomographic image of an object (1) from projection measurements mi. In the update equation for μjn during the n-th iteration the backprojected error (mi−mi−(μjn)) is weighted by a voxel dependent factor Formula (I). Such a voxel dependent update may particularly be included in the algorithms of ART or ML.

    摘要翻译: 本发明涉及一种用于从投影测量mi在物体(1)的断层图像中迭代重建衰减系数μj的装置和方法。 在第n次迭代期间的μjn的更新方程中,反投影误差(mi-mi-(μjn))由体素因子因子公式(I)加权。 这种体素相关更新可以特别地包括在ART或ML的算法中。

    PROJECTION SYSTEM FOR PRODUCING ATTENUATION COMPONENTS
    9.
    发明申请
    PROJECTION SYSTEM FOR PRODUCING ATTENUATION COMPONENTS 审中-公开
    用于生产衰减组件的投影系统

    公开(公告)号:US20100104161A1

    公开(公告)日:2010-04-29

    申请号:US12529715

    申请日:2008-03-03

    IPC分类号: G06T5/00

    摘要: The invention relates to a projection system for producing attenuation components of projection data of a region of interest. The projection system comprises a projection data providing unit (1, 2, 6, 7, 8) for providing energy-dependent projection data of the region of interest. The projection system further comprises a calculation unit (12) for calculating different attenuation components generated by different attenuation effects from the energy-dependent projection data, wherein the different attenuation components contribute to the projection data and a transformation unit (13) for transforming the attenuation components such that a correlation of the attenuations components is reduced. The invention relates further to a corresponding projection method and a corresponding computer program.

    摘要翻译: 本发明涉及用于产生感兴趣区域的投影数据的衰减分量的投影系统。 投影系统包括用于提供感兴趣区域的与能量相关的投影数据的投影数据提供单元(1,2,6,7,8)。 投影系统还包括计算单元(12),用于根据能量相关投影数据计算由不同衰减效应产生的不同衰减分量,其中不同的衰减分量有助于投影数据;以及变换单元(13),用于变换衰减 使得衰减分量的相关性降低的组件。 本发明进一步涉及相应的投影方法和相应的计算机程序。

    ENERGY SPECTRUM RECONSTRUCTION
    10.
    发明申请
    ENERGY SPECTRUM RECONSTRUCTION 有权
    能源光谱重建

    公开(公告)号:US20090310736A1

    公开(公告)日:2009-12-17

    申请号:US12373112

    申请日:2007-07-02

    IPC分类号: H05G1/64 G01T1/29 H05G1/60

    CPC分类号: G01T1/2985

    摘要: A computed tomography system includes an x-ray source (108) that rotates about and emits radiation through an imaging region (116). At least one finite energy resolution detector (112) detects the emitted radiation. The at least one finite resolution detector (112) includes a plurality of sub-detectors (204). Each of the plurality of sub-detectors (204) is associated with one or more different energy thresholds. Each of the energy thresholds is used to count a number of incident photons based on a corresponding energy level. A reconstruction system (136) reconstructs the photon counts to generate one or more images of a subject residing within the imaging region (116).

    摘要翻译: 计算机断层摄影系统包括绕着成像区域(116)旋转并发射辐射的x射线源(108)。 至少一个有限能量分辨率检测器(112)检测发射的辐射。 所述至少一个有限分辨率检测器(112)包括多个子检测器(204)。 多个子检测器(204)中的每一个与一个或多个不同的能量阈值相关联。 每个能量阈值用于根据相应的能级对一些入射光子进行计数。 重建系统(136)重建光子计数以产生驻留在成像区域(116)内的对象的一个​​或多个图像。