TOMOGRAPHIC IMAGING USING POISSONIAN DETECTOR DATA
    1.
    发明申请
    TOMOGRAPHIC IMAGING USING POISSONIAN DETECTOR DATA 有权
    使用POISSONIAN检测器数据进行TOMOGRAPHIC成像

    公开(公告)号:US20120281896A1

    公开(公告)日:2012-11-08

    申请号:US12990849

    申请日:2010-01-28

    IPC分类号: G06K9/00

    摘要: An image reconstruction method for reconstructing a tomographic image (fj) of a region of investigation within an object (1), comprises the steps of providing detector data (yi) comprising Poisson random values measured at an i-th of a plurality of different positions, e.g. i=(k,l) with pixel index k on a detector device and angular index l referring to both the angular position (αl) and the rotation radius (rl) of the detector device (10) relative to the object (1), providing a predetermined system matrix Aij assigning a j-th voxel of the object (1) to the i-th detector data (yi), and reconstructing the tomographic image (fj) based on the detector data (yi), said reconstructing step including a procedure of minimizing a functional F(f) depending on the detector data (yi) and the system matrix Aij and additionally including a sparse or compressive representation of the object (1) in an orthobasis T, wherein the tomographic image (fj) represents the global minimum of the functional F(f). Furthermore, an imaging method and an imaging device using the image reconstruction method are described.

    摘要翻译: 一种用于重建物体(1)内的调查区域的断层图像(fj)的图像重建方法,包括以下步骤:提供检测器数据(yi),其包括在多个不同位置的第i个测量的泊松随机值 ,例如 i =(k,l),检测器装置上具有像素索引k,角度指数l指的是检测装置(10)相对于物体(1)的角位置(α1)和旋转半径(rl) 提供将对象(1)的第j个体素分配给第i个检测器数据(yi)的预定系统矩阵Aij,以及基于检测器数据(yi)重建断层图像(fj),所述重建步骤包括 根据检测器数据(yi)和系统矩阵Aij最小化功能F(f)的程序,并且还包括邻接位置T中的物体(1)的稀疏或压缩表示,其中断层图像(fj)表示 函数F(f)的全局最小值。 此外,描述了使用图像重建方法的成像方法和成像装置。

    Tomographic imaging using poissonian detector data
    2.
    发明授权
    Tomographic imaging using poissonian detector data 有权
    使用泊松检测器数据进行断层成像

    公开(公告)号:US08559690B2

    公开(公告)日:2013-10-15

    申请号:US12990849

    申请日:2010-01-28

    IPC分类号: G06K9/00

    摘要: An image reconstruction method for reconstructing a tomographic image (fj) of a region of investigation within an object (1), comprises the steps of providing detector data (yi) comprising Poisson random values measured at an i-th of a plurality of different positions, e.g. i=(k,l) with pixel index k on a detector device and angular index l referring to both the angular position (αl) and the rotation radius (rl) of the detector device (10) relative to the object (1), providing a predetermined system matrix Aij assigning a j-th voxel of the object (1) to the i-th detector data (yi), and reconstructing the tomographic image (fj) based on the detector data (yi), said reconstructing step including a procedure of minimizing a functional F(f) depending on the detector data (yi) and the system matrix Aij and additionally including a sparse or compressive representation of the object (1) in an orthobasis T, wherein the tomographic image (fj) represents the global minimum of the functional F(f). Furthermore, an imaging method and an imaging device using the image reconstruction method are described.

    摘要翻译: 一种用于重建物体(1)内的调查区域的断层图像(fj)的图像重建方法,包括以下步骤:提供检测器数据(yi),其包括在多个不同位置的第i个测量的泊松随机值 ,例如 i =(k,l),检测器装置上具有像素索引k,并且角度指数l指的是检测器装置(10)相对于物体(1)的角位置(α)和旋转半径(rl) 提供将对象(1)的第j个体素分配给第i检测器数据(yi)的预定系统矩阵Aij,以及基于检测器数据(yi)重建断层图像(fj),所述重建步骤包括 根据检测器数据(yi)和系统矩阵Aij最小化功能F(f)的程序,并且还包括邻接位置T中的物体(1)的稀疏或压缩表示,其中断层图像(fj)表示 函数F(f)的全局最小值。 此外,描述了使用图像重建方法的成像方法和成像装置。

    TRANSMISSION IMAGE RECONSTRUCTION AND IMAGING USING POISSONIAN DETECTOR DATA
    3.
    发明申请
    TRANSMISSION IMAGE RECONSTRUCTION AND IMAGING USING POISSONIAN DETECTOR DATA 有权
    使用POISSONIAN检测器数据传输图像重构和成像

    公开(公告)号:US20140140602A1

    公开(公告)日:2014-05-22

    申请号:US14232492

    申请日:2011-07-13

    IPC分类号: G06T11/00 G06T7/00

    摘要: An image reconstruction method for reconstructing an image fmin representing a region of investigation within an object includes providing detector data (yi) having Poisson random values from an X-ray transmission measurement using an X-ray source and a detector device, the detector data (yi) being measured at an i-th of a plurality of different pixel positions of the detector device relative to the object, and reconstructing the image fmin based on the detector data (yi), the reconstructing step including a procedure of minimizing a functional F  ( f _ ) = 1 k  ∑ i = 1 k   ( μ i - y i  log   μ i ) + a   T - 1  f _  p where f is a current test image used for minimizing the functional F(f). The image fmin represents the global minimum of F(f).

    摘要翻译: 用于重建表示物体内的调查区域的图像fmin的图像重建方法包括:使用X射线源和检测器装置的X射线透射测量提供具有泊松随机值的检测器数据(yi),检测器数据 yi)在所述检测器装置的多个不同像素位置的第i个相对于所述对象被测量,并且基于所述检测器数据(yi)重建所述图像fmin,所述重建步骤包括使功能F (f _)= 1 kΣi = 1 k(μi - yi logμi)其中f是用于最小化的当前测试图像 功能F(f)。 图像fmin表示F(f)的全局最小值。

    Transmission image reconstruction and imaging using poissonian detector data
    4.
    发明授权
    Transmission image reconstruction and imaging using poissonian detector data 有权
    使用泊松检测器数据进行透射图像重建和成像

    公开(公告)号:US09418453B2

    公开(公告)日:2016-08-16

    申请号:US14232492

    申请日:2011-07-13

    IPC分类号: G06T7/00 G06T11/00

    摘要: An image reconstruction method for reconstructing an image fmin representing a region of investigation within an object includes providing detector data (yi) having Poisson random values from an X-ray transmission measurement using an X-ray source and a detector device, the detector data (yi) being measured at an i-th of a plurality of different pixel positions of the detector device relative to the object, and reconstructing the image fmin based on the detector data (yi), the reconstructing step including a procedure of minimizing a functional F ⁡ ( f _ ) = 1 k ⁢ ∑ i = 1 k ⁢ ⁢ ( μ i - y i ⁢ log ⁢ ⁢ μ i ) + a ⁢  T - 1 ⁢ f _  p where f is a current test image used for minimizing the functional F(f). The image fmin represents the global minimum of F(f).

    摘要翻译: 用于重建表示物体内的调查区域的图像fmin的图像重建方法包括:使用X射线源和检测器装置的X射线透射测量提供具有泊松随机值的检测器数据(yi),检测器数据 yi)在所述检测器装置的多个不同像素位置的第i个相对于所述对象被测量,并且基于所述检测器数据(yi)重建所述图像fmin,所述重建步骤包括使功能F ⁡(f _)= 1kΣi = 1 k笨(μi -yi logüμμ)+ aT-1 f _p其中f是用于最小化的当前测试图像 功能F(f)。 图像fmin表示F(f)的全局最小值。