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1. 发明申请

US20100104161A1 PROJECTION SYSTEM FOR PRODUCING ATTENUATION COMPONENTS 审中-公开
标题翻译：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
申请人： Andy Ziegler , Ewald Roessl , Roland Proksa
发明人： Andy Ziegler , Ewald Roessl , Roland Proksa
IPC分类号： G06T5/00
CPC分类号： G06T11/005 , G06T5/002 , G06T5/20 , G06T2207/10081 , G06T2207/30004
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。

2. 发明授权

US08155422B2 Dynamic optimization of the signal-to-noise ratio of dual-energy attenuation data for reconstructing images 有权
标题翻译：动态优化用于重建图像的双能量衰减数据的信噪比
公开(公告)号：US08155422B2
公开(公告)日：2012-04-10
申请号：US12293835
申请日：2007-03-15
申请人： Andy Ziegler , Ewald Roessl
发明人： Andy Ziegler , Ewald Roessl
IPC分类号： G06K9/00
CPC分类号： G01T1/2985
摘要： It is described a method for dynamically optimizing the signal-to-noise ratio of attenuation data related to two different X-ray energies for reconstructing an image of an object under examination. The method comprises (a) estimating the thickness and the material composition of the object at a plurality of different projection angles, (b) for each of the various projection angles calculating for a variety of combinations of different first and second X-ray energies a corresponding common signal-to-noise ratio, (c) for each of the various projection angles choosing the first and the second X-ray energy causing the maximum corresponding common signal-to-noise ratio, and (d) for each of the various projection angles acquiring X-ray attenuation data of the object whereby the two X-ray energies are the X-ray energies causing a maximum signal-to-noise ratio assigned to the respective projection angle.
摘要翻译：描述了一种用于动态优化与两个不同X射线能量相关的衰减数据的信噪比的方法，用于重建被检查物体的图像。该方法包括：（a）以多个不同的投影角度估计物体的厚度和材料成分，（b）对于针对不同的第一和第二X射线能量的各种组合计算的各种投影角度中的每一个相应的公共信噪比，（c）对于选择第一和第二X射线能量的各种投影角度中的每一个引起最大相应的公共信噪比，（d）对于各种各样的投影角度获取物体的X射线衰减数据，由此两个X射线能量是分配给各个投影角度的最大信噪比的X射线能量。

3. 发明申请

US20100232669A1 DYNAMIC OPTIMIZATION OF THE SIGNAL-TO-NOISE RATIO OF DUAL-ENERGY ATTENUATION DATA FOR RECONSTRUCTING IMAGES 有权
标题翻译：用于重建图像的双能量衰减数据的信号噪声比的动态优化
公开(公告)号：US20100232669A1
公开(公告)日：2010-09-16
申请号：US12293835
申请日：2007-03-15
申请人： Andy Ziegler , Ewald Roessl
发明人： Andy Ziegler , Ewald Roessl
IPC分类号： G06K9/00
CPC分类号： G01T1/2985
摘要： It is described a method for dynamically optimizing the signal-to-noise ratio of attenuation data related to two different X-ray energies for reconstructing an image of an object under examination. The method comprises (a) estimating the thickness and the material composition of the object at a plurality of different projection angles, (b) for each of the various projection angles calculating for a variety of combinations of different first and second X-ray energies a corresponding common signal-to-noise ratio, (c) for each of the various projection angles choosing the first and the second X-ray energy causing the maximum corresponding common signal-to-noise ratio, and (d) for each of the various projection angles acquiring X-ray attenuation data of the object whereby the two X-ray energies are the X-ray energies causing a maximum signal-to-noise ratio assigned to the respective projection angle.
摘要翻译：描述了一种用于动态优化与两个不同X射线能量相关的衰减数据的信噪比的方法，用于重建被检查物体的图像。该方法包括：（a）以多个不同的投影角度估计物体的厚度和材料成分，（b）对于针对不同的第一和第二X射线能量的各种组合计算的各种投影角度中的每一个相应的公共信噪比，（c）对于选择第一和第二X射线能量的各种投影角度中的每一个引起最大相应的公共信噪比，（d）对于各种各样的投影角度获取物体的X射线衰减数据，由此两个X射线能量是分配给各个投影角度的最大信噪比的X射线能量。

4. 发明授权

US07822169B2 Noise reduction in dual-energy X-ray imaging 失效
标题翻译：双能X射线成像降噪
公开(公告)号：US07822169B2
公开(公告)日：2010-10-26
申请号：US12293845
申请日：2007-03-14
申请人： Ewald Roessl , Andy Ziegler
发明人： Ewald Roessl , Andy Ziegler
IPC分类号： A61B6/00
CPC分类号： G06T5/50 , A61B6/027 , A61B6/583
摘要： It is described a method for reducing noise of X-ray attenuation data related to a first and second spectral X-ray data acquisition. The method comprises the steps of (a) acquiring data representing the X-ray attenuation behavior of a region of interest, (b) determining a first and a second attenuation-base line integral for the first and the second X-ray acquisition, respectively, and (c) calculating expected first and second signal to noise ratios for the first and the second attenuation-base line integral based on given signal to noise ratios for the first and second spectral X-ray data acquisition, respectively. The method further comprises the steps of (d) repeating the above mentioned steps of determining the attenuation-base line integrals and calculating the expected signal to noise ratios for a further first spectral X-ray data acquisition and (e) selecting improved spectral X-ray data acquisitions in order to enhance the overall signal to noise ratio of a final X-ray image.
摘要翻译：描述了一种用于降低与第一和第二光谱X射线数据采集相关的X射线衰减数据的噪声的方法。该方法包括以下步骤：（a）获取表示感兴趣区域的X射线衰减特性的数据，（b）分别确定第一和第二X射线采集的第一和第二衰减基线积分，以及（c）分别基于用于第一和第二频谱X射线数据采集的给定信噪比来计算第一和第二衰减基线积分的期望的第一和第二信噪比。该方法还包括以下步骤：（d）重复上述步骤以确定衰减基线积分并计算进一步的第一光谱X射线数据采集的预期信噪比，以及（e）选择改进的光谱X- 以提高最终X射线图像的整体信噪比。

5. 发明授权

US08000434B2 Energy spectrum reconstruction 有权
标题翻译：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
申请人： Andy Ziegler , Roland Proksa
发明人： Andy Ziegler , Roland Proksa
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。

6. 发明授权

US07826585B2 Stereo tube computed tomography 有权
标题翻译：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
申请人： Roland Proksa , Andy Ziegler
发明人： Roland Proksa , Andy Ziegler
IPC分类号： G01N23/083 , G01N23/087
CPC分类号： G01T1/2985 , A61B6/027 , A61B6/032 , A61B6/4014 , G01T1/1647
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。

7. 发明申请

US20080273655A1 Imaging Method with Back Projection 失效
标题翻译：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
申请人： Tim Nielsen , Andy Ziegler , Thomas Koehler , Roland Proksa
发明人： Tim Nielsen , Andy Ziegler , Thomas Koehler , Roland Proksa
IPC分类号： A61B6/00 , G06K9/00
CPC分类号： G06T11/006 , A61B6/027 , G06T2211/421 , Y10S378/901
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。

8. 发明申请

US20100002830A1 STEREO TUBE COMPUTED TOMOGRAPHY 有权
标题翻译：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
申请人： Roland Proksa , Andy Ziegler
发明人： Roland Proksa , Andy Ziegler
IPC分类号： A61B6/00 , G01T1/29
CPC分类号： G01T1/2985 , A61B6/027 , A61B6/032 , A61B6/4014 , G01T1/1647
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。

9. 发明申请

US20090202036A1 IMAGE RECONSTRUCTION WITH VOXEL DEPENDENT INTERPOLATION 有权
标题翻译：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
申请人： Andy Ziegler , Thomas Koehler , Tim Nielsen , Roland Proksa , Dominic J, Heuscher
发明人： Andy Ziegler , Thomas Koehler , Tim Nielsen , Roland Proksa , Dominic J, Heuscher
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。

10. 发明授权

US07570731B2 Imaging method with back projection 失效
标题翻译：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
申请人： Tim Nielsen , Andy Ziegler , Thomas Koehler , Roland Proksa
发明人： Tim Nielsen , Andy Ziegler , Thomas Koehler , Roland Proksa
IPC分类号： A61B6/03
CPC分类号： G06T11/006 , A61B6/027 , G06T2211/421 , Y10S378/901
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。

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