SCATTERED RADIATION CORRECTION OF DETECTOR SIGNALS FOR PROJECTION-BASED IMAGING
    1.
    发明申请
    SCATTERED RADIATION CORRECTION OF DETECTOR SIGNALS FOR PROJECTION-BASED IMAGING 审中-公开
    用于基于投影的成像的检测器信号的散射辐射校正

    公开(公告)号:US20090020692A1

    公开(公告)日:2009-01-22

    申请号:US12162806

    申请日:2007-02-09

    IPC分类号: G01D18/00

    CPC分类号: G06T11/005

    摘要: A method of correcting detector signals, in particular for scatter noise correction with an projection-based imaging device, comprises the steps of irradiating an object (1) with a radiation beam (2) including a plurality of discrete beam component (3, 3.1, 3.2) bounded by a plurality of masked angular ranges (4, 4.1, 4.2), so that the object (1) is partially irradiated with the beam components (3, 3.1, 3.2), detecting radiation transmitted through the object (1) with a detector device (30) comprising a plurality of detector portions (32, 32.1, 32.2, 33.1, 33.2), wherein direct radiation of the beam components (3) is detected by directly irradiated detector portions (32, 32.1, 32.2), detecting indirect radiation occurring in the masked angular ranges by masked detector portions (33.1, 33.2) adjacent to the directly irradiated detector portions (32, 32.1, 32.2), and correcting detector signals of the directly irradiated detector portions (32, 32.1, 32.2) in dependence on the detector signals of the masked detector portions (33.1, 33.2) for providing corrected detector signals. Furthermore, an imaging device for projection-based imaging is described.

    摘要翻译: 校正检测器信号的方法,特别是用于基于投影的成像装置的散射噪声校正的方法包括以下步骤:用物体(1)照射包括多个离散束分量(3,3.1, 3.2),其被多个掩蔽角度范围(4,4.1,4.2)限定,使得物体(1)被光束分量(3,3.1,3.2)部分地照射,检测通过物体(1)传播的辐射与 检测器装置(30),包括多个检测器部分(32,32.1,32.2,33.1,33.2),其中通过直接照射的检测器部分(32,32.1,32.2)检测光束分量(3)的直接辐射,检测 通过与直接照射的检测器部分(32,32.1,32.2)相邻的掩蔽的检测器部分(33.1,33.2)在掩蔽的角度范围内发生间接辐射,以及校正直接照射的检测器部分(32,32.1,32.2)中的检测器信号 依赖于检测器si 用于提供校正的检测器信号的掩蔽检测器部分(33.1,33.2)的接口。 此外,描述了用于基于投影的成像的成像装置。

    Method of processing a Radon data based image function and imaging method
    2.
    发明授权
    Method of processing a Radon data based image function and imaging method 失效
    基于氡数据的图像处理方法及成像方法

    公开(公告)号:US08630466B2

    公开(公告)日:2014-01-14

    申请号:US12527188

    申请日:2008-02-08

    IPC分类号: G06K9/00

    CPC分类号: G06T11/006

    摘要: An image processing method for providing a digitized image as an approximation of an image function ƒ, wherein the digitized image comprises a plurality of pixels with a predetermined pixel size, comprises the steps of providing the image function ƒ from Radon data comprising a plurality of projection functions measured corresponding to a plurality of predetermined projection directions (v), and determining pixel values from the image function, the pixel values representing the digitized image to be obtained, wherein the pixel values are determined in dependence on at least two image function values within the pixel size of the respective pixel. Furthermore, an imaging method and an imaging device using the image processing method are described.

    摘要翻译: 一种用于提供数字化图像作为图像函数f的近似的图像处理方法,其中所述数字化图像包括具有预定像素大小的多个像素,包括以下步骤:从包含多个投影的氡数据提供图像函数f 根据多个预定投影方向(v)测量的函数,以及根据图像函数确定像素值,表示要获得的数字化图像的像素值,其中根据至少两个图像函数值确定像素值 各像素的像素尺寸。 此外,描述了使用该图像处理方法的成像方法和成像装置。

    IMAGING APPARATUS AND IMAGING METHOD
    3.
    发明申请
    IMAGING APPARATUS AND IMAGING METHOD 有权
    成像装置和成像方法

    公开(公告)号:US20090310738A1

    公开(公告)日:2009-12-17

    申请号:US12306347

    申请日:2007-07-04

    IPC分类号: A61B6/00 G21K1/04 H01J3/14

    CPC分类号: G01T1/2985

    摘要: Imaging apparatus, for analyzing an object, comprising: a radiation source for transmission of radiation through said object in a section plane of said object; a radiation detector for detecting said radiation in said section plane of said object after transmission through said object; and a masking device for masking out a part of said radiation, wherein said masked part of said radiation is movable in said section plane relative to said radiation detector during said analysis of said object.

    摘要翻译: 一种用于分析物体的成像装置,包括:辐射源,用于在所述物体的截面中透射通过所述物体的辐射; 辐射检测器,用于在透过所述物体之后检测所述物体的所述截面中的所述辐射; 以及用于掩蔽所述辐射的一部分的掩蔽装置,其中所述辐射的所述掩蔽部分在所述物体的所述分析期间可相对于所述辐射检测器在所述截面中移动。

    Method and Device for Shaping an Energy Input Beam
    4.
    发明申请
    Method and Device for Shaping an Energy Input Beam 失效
    形成能量输入光束的方法和装置

    公开(公告)号:US20080165917A1

    公开(公告)日:2008-07-10

    申请号:US11794557

    申请日:2005-12-21

    IPC分类号: A61B6/06 G06K9/00

    摘要: An irradiation method, in particular for imaging a region of investigation (2) of an object (1), comprises generating at least one energy input beam (3) with at least one energy input beam source (210), wherein the at least one energy input beam (3) comprises a plurality of individual energy input beam components (3.1, 3.2, 3.3, . . . ), and irradiating the region of investigation (2) with the at least one energy input beam (3) along a plurality of projection directions, wherein the energy input beam components (3.1, 3.2, 3.3, . . . ) are formed with at least one beam mask (211) made of an energy input shielding material with through holes. Furthermore, imaging methods and devices for irradiating or imaging the object are described.

    摘要翻译: 特别是用于对物体(1)的调查区域(2)进行成像的照射方法包括用至少一个能量输入光束源(210)生成至少一个能量输入光束(3),其中至少一个 能量输入光束(3)包括多个单独的能量输入光束分量(3.1,3.2,3.3等),并且沿着多个辐射照射所述至少一个能量输入光束(3)的调查区域(2) 的投影方向,其中能量输入光束分量(3.1,3.2,3.3等)由至少一个由具有通孔的能量输入屏蔽材料制成的光束掩模(211)形成。 此外,描述用于照射或成像物体的成像方法和装置。

    RECONSTRUCTING A TOMOGRAPHIC IMAGE WITH REDUCED ARTIFACTS
    6.
    发明申请
    RECONSTRUCTING A TOMOGRAPHIC IMAGE WITH REDUCED ARTIFACTS 失效
    用减少的人造成重建图像

    公开(公告)号:US20110266453A1

    公开(公告)日:2011-11-03

    申请号:US13132841

    申请日:2009-12-04

    IPC分类号: G01T1/00 G06K9/36

    摘要: A method of reconstructing a tomographic image of a region of investigation with reduced artifacts, said method comprises the steps of (a) reconstructing a first partial image and a second partial image of the region of investigation from first and second projection profiles each of which including projection data collected at first and second different groups of parallel projection lines, resp., wherein the first and second projection profiles are provided such that streak aliasing artifacts in the first and second partial images have different spatial phases, and (b) generating the tomographic image of the region of investigation by superimposing the first and second partial images. Preferably, the first and second projection profiles are constructed such that streak aliasing artifacts in the first and second partial images have opposite spatial phases relative to each other. Furthermore, an imaging method and an imaging device for imaging a region of investigation in an object are described.

    摘要翻译: 一种利用减少的伪像来重建调查区域的断层图像的方法,所述方法包括以下步骤:(a)从第一和第二投影轮廓重建调查区域的第一部分图像和第二部分图像,每个投影图包括 在第一和第二不同组的平行投影线上收集的投影数据,其中提供第一和第二投影轮廓,使得第一和第二部分图像中的条纹混叠伪影具有不同的空间相位,以及(b)产生断层图像 通过叠加第一和第二部分图像的调查区域的图像。 优选地,第一和第二投影轮廓被构造成使得第一和第二部分图像中的条纹混叠伪像相对于彼此具有相反的空间相位。 此外,描述了用于对物体中的调查区域进行成像的成像方法和成像装置。

    Method and Device of Reconstructing an (N+1)-Dimensional Image Function from Radon Data
    7.
    发明申请
    Method and Device of Reconstructing an (N+1)-Dimensional Image Function from Radon Data 有权
    从氡数据重建(N + 1)维图像函数的方法和装置

    公开(公告)号:US20080130974A1

    公开(公告)日:2008-06-05

    申请号:US11794558

    申请日:2005-12-21

    IPC分类号: G06K9/00 G06K9/36

    摘要: A method of reconstructing an (n+1)-dimensional image function ƒ representing a region of investigation comprises determining the image function ƒ from n-dimensional or less dimensional Radon data comprising a plurality of projection functions pθ(t) measured corresponding to a plurality of predetermined projection directions (Θ), wherein the image function ƒ is determined as a sum of polynomials multiplied with values of the projection functions pθ(t). Imaging methods, imaging devices, and computer tomography devices using this reconstruction method are described.

    摘要翻译: 重建表示调查区域的(n + 1)维图像函数f的方法包括从n维或更小尺寸的Radon数据确定包括多个投影函数p < (t)对应于多个预定投影方向(Theta)测量,其中图像函数f被确定为与投影函数pθθ(t)的值相乘的多项式的和。 描述使用该重建方法的成像方法,成像装置和计算机断层摄影装置。

    TOMOGRAPHY APPARATUS AND TOMOGRAPHY METHOD
    8.
    发明申请
    TOMOGRAPHY APPARATUS AND TOMOGRAPHY METHOD 有权
    TOMOGRAPHY装置和TOMOGRAPHY方法

    公开(公告)号:US20130039459A1

    公开(公告)日:2013-02-14

    申请号:US13320175

    申请日:2010-05-10

    IPC分类号: A61B6/02

    摘要: A tomography apparatus that generates images of an object includes a radiation source emitting a radiation beam, wherein the radiation beam rotates around the object and penetrates the object; a radiation detector rotating around the object opposite the radiation source so that the radiation detector detects the radiation beam after penetration of the object; a radiation mask surrounding the object that masks the radiation beam, wherein the radiation mask is arranged in a path of the radiation beam between the radiation source and the radiation detector and the radiation beam passes the radiation mask only once between the radiation source and the radiation detector.

    摘要翻译: 产生物体图像的断层摄影装置包括发射辐射束的辐射源,其中辐射束围绕物体旋转并穿透物体; 辐射检测器围绕与辐射源相对的物体旋转,使得辐射检测器在物体穿透之后检测辐射束; 围绕物体的辐射掩模,其掩蔽辐射束,其中辐射掩模布置在辐射源和辐射检测器之间的辐射束的路径中,并且辐射束仅在辐射源和辐射之间通过辐射掩模一次 探测器。

    Method of reconstructing an image function from Radon data
    10.
    发明授权
    Method of reconstructing an image function from Radon data 有权
    从氡数据重建图像函数的方法

    公开(公告)号:US08094910B2

    公开(公告)日:2012-01-10

    申请号:US12282877

    申请日:2007-03-14

    IPC分类号: G06K9/00 A61B6/00

    CPC分类号: G06T11/005 A61B6/027

    摘要: A method of reconstructing an image function on the basis of a plurality of projection profiles corresponding to a plurality of projection directions through a region of investigation, each projection profile including a series of value positions, wherein measured projection values corresponding to projection lines parallel to the respective projection direction are assigned to respective value positions and a plurality of remaining value positions are empty, comprises the steps of (a) assigning first interpolation values to the empty value positions for constructing a plurality of interpolation profiles on the basis of the projection profiles, wherein the first interpolation values are obtained from a first interpolation within a group of measured projection values having the same value position in different projection profiles, and (b) determining the image function by applying a predetermined reconstruction algorithm on the interpolation profiles.

    摘要翻译: 一种基于通过调查区域对应于多个投影方向的多个投影轮廓来重建图像功能的方法,每个投影轮廓包括一系列值位置,其中对应于与所述投影线平行的投影线的测量投影值 相应的投影方向被分配给相应的值位置,并且多个剩余值位置为空,包括以下步骤:(a)基于投影轮廓来分配用于构建多个插值轮廓的空值位置的第一内插值, 其中所述第一内插值是从在不同投影轮廓中具有相同值位置的测量投影值组中的第一内插获得的,以及(b)通过对所述插值曲线应用预定重建算法来确定所述图像功能。