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1. 发明申请

US20080095305A1 Computer Tomography Apparatus And Method For Examining An Object Of Interest 失效
标题翻译：计算机断层扫描仪和方法，用于检查感兴趣的对象
公开(公告)号：US20080095305A1
公开(公告)日：2008-04-24
申请号：US11718724
申请日：2005-11-02
申请人： Andy Ziegler , Thomas Koehler , Michael Grass
发明人： Andy Ziegler , Thomas Koehler , Michael Grass
IPC分类号： A61B6/03
CPC分类号： G01T1/2985 , A61B6/027 , A61B6/032 , A61B6/4241 , A61B6/482 , A61B6/483 , G01V5/0025 , G01V5/005 , G06T11/006 , G06T2211/424
摘要： A computer tomography apparatus (100) for examination of an object of interest (107), the computer tomography apparatus (100) comprising detecting elements (123) adapted to detect electromagnetic radiation coherently scattered from an object of interest (107) in an energy-resolving manner, and a determination unit (118) adapted to determine structural information concerning the object of interest (107) based on a statistical analysis of detecting signals received from the detecting elements (123).
摘要翻译：一种用于检查感兴趣对象（107）的计算机断层摄影装置（100），所述计算机断层摄影装置（100）包括检测元件（123），所述检测元件适于检测能量相关物体（107）相干散射的电磁辐射，以及确定单元（118），其适于基于从所述检测元件（123）接收的检测信号的统计分析来确定关于感兴趣对象的结构信息（107）。

2. 发明申请

US20100266182A1 APPARATUS FOR DETERMINING A PARAMETER OF A MOVING OBJECT 审中-公开
标题翻译：用于确定移动对象参数的装置
公开(公告)号：US20100266182A1
公开(公告)日：2010-10-21
申请号：US12741397
申请日：2008-11-04
申请人： Michael Grass , Andy Ziegler
发明人： Michael Grass , Andy Ziegler
IPC分类号： G06K9/00
CPC分类号： G06T7/251 , G06T7/246 , G06T2207/10076 , G06T2207/10081 , G06T2207/20004 , G06T2207/20092 , G06T2207/30048
摘要： The present invention relates to an apparatus for determining a parameter of a moving object, wherein the apparatus comprises an adaptive model providing unit (12) for providing an adaptive model of the object. The user can define the region of the adaptive model by a user interface (13). The apparatus further comprises an image data set providing unit (14) for providing a spatially and temporally dependent image data set of the moving object and an adaptation unit (15) for adapting at least a defined region of the adaptive model to the spatially and temporally dependent image data set for determining a spatially and temporally dependence of the defined region. The parameter of the moving object is determined depending on the spatially and temporally dependence of the defined region by a parameter determining unit (16).
摘要翻译：本发明涉及一种用于确定移动物体的参数的装置，其中，所述装置包括用于提供对象的自适应模型的自适应模型提供单元（12）。用户可以通过用户界面（13）来定义自适应模型的区域。该装置还包括用于提供移动物体的空间和时间上依赖的图像数据集的图像数据集提供单元（14），以及适配单元（15），用于至少将自适应模型的定义区域适应于空间和时间上用于确定所定义区域的空间和时间依赖性的依赖图像数据集。取决于由参数确定单元（16）定义的区域的空间和时间依赖性来确定移动对象的参数。

3. 发明申请

US20080273656A1 Advanced Convergence for Multiple Iterative Algorithm 有权
标题翻译：多重迭代算法的高级收敛
公开(公告)号：US20080273656A1
公开(公告)日：2008-11-06
申请号：US12096911
申请日：2006-12-04
申请人： Andy Ziegler , Michael Grass
发明人： Andy Ziegler , Michael Grass
IPC分类号： A61B6/00 , G06K9/00
CPC分类号： G06T11/005 , G06T2211/424
摘要： Iterative methods for reconstructing of three-dimensional images based on projection data signals obtained by a computer tomography system often result in wrong absorption coefficients in particular for regions including a hollow space of an object under examination. Furthermore iterative methods show a slow convergence for calculating such absorption coefficients. According to embodiments of the present invention there is provided a method for an advanced reconstruction of three-dimensional images based on modified projection data signals. The modification includes an addition of a constant absorption value to the measured projection data. Advantageously the constant absorption value is an absorption line integral through a virtual body having the spatial constant absorption coefficient of water. The virtual body preferably has a volume which is slightly bigger than the object of interest.
摘要翻译：基于由计算机断层摄影系统获得的投影数据信号重建三维图像的迭代方法通常导致错误的吸收系数，特别是对于包括被检查物体的中空空间的区域。此外，迭代方法显示计算这种吸收系数的缓慢收敛。根据本发明的实施例，提供了一种基于经修改的投影数据信号对三维图像进行高级重建的方法。修改包括对所测量的投影数据添加恒定的吸收值。有利地，恒定吸收值是通过具有水的空间常数吸收系数的虚拟体积分的吸收线。虚拟体优选地具有比感兴趣对象略大的体积。

4. 发明申请

US20080253502A1 Method and Device for the Iterative Reconstruction of Cardiac Images 有权
标题翻译：心脏图像迭代重建方法与装置
公开(公告)号：US20080253502A1
公开(公告)日：2008-10-16
申请号：US11908415
申请日：2006-03-09
申请人： Andy Ziegler , Michael Grass , Thomas Koehler
发明人： Andy Ziegler , Michael Grass , Thomas Koehler
IPC分类号： H05G1/60
CPC分类号： G06T11/006 , A61B6/027 , G06T2211/424
摘要： The invention relates to a method and a device for the iterative reconstruction of cross-sectional images of the heart (7) of a patient based on projections (P1, . . . P5) from different directions which are for example generated with a helical cone-beam CT scanner. A cardiac weight function (f) quantifies how near the projections (P1, . . . ) are to a given observation phase (To) of the heart cycle based on simultaneously recorded electrocardiographic signals (ECG). The whole set of projections (P1, . . . ) is divided into subsets (S1, . . . ) which each contain only projections corresponding to a similar cardiac weight (f), and an iterative reconstruction algorithm like ART uses in one update or iteration step all projections of such a subset (S1, . . . ) simultaneous].
摘要翻译：本发明涉及一种用于基于来自不同方向的投影（P 1，...，P 5）迭代重建病人心脏（7）的横截面图像的方法和装置，其例如用螺旋锥束CT扫描仪。心脏重量函数（f）基于同时记录的心电图信号（ECG）量化投影（P 1，...）附近到心脏周期的给定观察阶段（To）的距离。整个投影组（P 1，...）被划分成子集（S 1，...），每个子集仅包含对应于类似心脏重量（f）的投影，并且像ART这样的迭代重建算法在一个更新或迭代步骤同步所有这样的子集（S 1，...）的投影。

5. 发明授权

US07623616B2 Computer tomography apparatus and method for examining an object of interest 失效
标题翻译：用于检查感兴趣对象的计算机断层摄影装置和方法
公开(公告)号：US07623616B2
公开(公告)日：2009-11-24
申请号：US11718724
申请日：2005-11-02
申请人： Andy Ziegler , Thomas Koehler , Michael Grass
发明人： Andy Ziegler , Thomas Koehler , Michael Grass
IPC分类号： G01N23/087 , G01N23/201
CPC分类号： G01T1/2985 , A61B6/027 , A61B6/032 , A61B6/4241 , A61B6/482 , A61B6/483 , G01V5/0025 , G01V5/005 , G06T11/006 , G06T2211/424
摘要： A computer tomography apparatus (100) for examination of an object of interest (107), the computer tomography apparatus (100) comprising detecting elements (123) adapted to detect electromagnetic radiation coherently scattered from an object of interest (107) in an energy-resolving manner, and a determination unit (118) adapted to determine structural information concerning the object of interest (107) based on a statistical analysis of detecting signals received from the detecting elements (123).
摘要翻译：一种用于检查感兴趣对象（107）的计算机断层摄影装置（100），所述计算机断层摄影装置（100）包括检测元件（123），所述检测元件适于检测能量相关物体（107）相干散射的电磁辐射，以及确定单元（118），其适于基于从所述检测元件（123）接收的检测信号的统计分析来确定关于感兴趣对象的结构信息（107）。

6. 发明授权

US07596204B2 Method and device for the iterative reconstruction of cardiac images 有权
标题翻译：心脏图像重复重建的方法和装置
公开(公告)号：US07596204B2
公开(公告)日：2009-09-29
申请号：US11908415
申请日：2006-03-09
申请人： Andy Ziegler , Michael Grass , Thomas Koehler
发明人： Andy Ziegler , Michael Grass , Thomas Koehler
IPC分类号： A61B6/00
CPC分类号： G06T11/006 , A61B6/027 , G06T2211/424
摘要： The invention relates to a method and a device for the iterative reconstruction of cross-sectional images of the heart (7) of a patient based on projections (P1, . . . P5) from different directions which are for example generated with a helical cone-beam CT scanner. A cardiac weight function (f) quantifies how near the projections (P1, . . . ) are to a given observation phase (To) of the heart cycle based on simultaneously recorded electrocardiographic signals (ECG). The whole set of projections (P1, . . . ) is divided into subsets (S1, . . . ) which each contain only projections corresponding to a similar cardiac weight (f), and an iterative reconstruction algorithm like ART uses in one update or iteration step all projections of such a subset (S1, . . . ) simultaneously.
摘要翻译：本发明涉及一种用于基于来自不同方向的投影（P1，...，P5）迭代重建患者心脏（7）的横截面图像的方法和装置，其例如用螺旋锥体光束CT扫描仪。心脏重量函数（f）基于同时记录的心电图信号（ECG）量化投影（P1，...）附近的心脏周期的给定观察阶段（To）附近。整个投影组（P1 ...）分为子集（S1，...），每个子集只包含与相似的心脏重量（f）相对应的投影，像ART这样的迭代重建算法在一个更新或迭代步骤同时对所述子集（S1，...）进行所有投影。

7. 发明授权

US08908953B2 Imaging system and imaging method for imaging a region of interest 有权
标题翻译：用于成像感兴趣区域的成像系统和成像方法
公开(公告)号：US08908953B2
公开(公告)日：2014-12-09
申请号：US12663851
申请日：2008-06-09
申请人： Andy Ziegler , Michael Grass
发明人： Andy Ziegler , Michael Grass
IPC分类号： G06K9/00 , G06T11/00
CPC分类号： G06T11/005 , G06T2211/432
摘要： The present invention relates to an imaging system for imaging a region of interest, wherein the imaging system comprises a projection data generation unit including a radiation source (2) and a detection unit (6) for acquiring projection data in different angular directions. The projection generation unit is adapted for acquiring projection data in an acquisition region on the detection unit. The imaging system further comprises a reconstruction unit (12) for reconstructing a first image of the region of interest from the acquired projection data and a forward projection unit (13) for forward projecting through the first image of the region of interest for calculating projection data corresponding to regions on the detection unit outside of the acquisition region. The reconstruction unit (12) is adapted for reconstructing a second image of the region of interest from the acquired projection data and from the calculated projection data.
摘要翻译：本发明涉及一种用于对感兴趣区域成像的成像系统，其中该成像系统包括投影数据生成单元，该投影数据生成单元包括用于获取不同角度方向的投影数据的辐射源（2）和检测单元（6）。投影产生单元适于在检测单元上的获取区域中获取投影数据。所述成像系统还包括重建单元（12），用于从所获取的投影数据重构所述感兴趣区域的第一图像;以及前向投影单元（13），用于通过所述感兴趣区域的第一图像向前投影以计算投影数据对应于获取区域外部的检测单元上的区域。重建单元（12）适于从所获取的投影数据和所计算的投影数据中重建感兴趣区域的第二图像。

8. 发明申请

US20100215242A1 IMAGING SYSTEM AND IMAGING METHOD FOR IMAGING A REGION OF INTEREST 有权
标题翻译：用于成像区域的成像系统和成像方法
公开(公告)号：US20100215242A1
公开(公告)日：2010-08-26
申请号：US12663851
申请日：2008-06-09
申请人： Andy Ziegler , Michael Grass
发明人： Andy Ziegler , Michael Grass
IPC分类号： G06K9/00
CPC分类号： G06T11/005 , G06T2211/432
摘要： The present invention relates to an imaging system for imaging a region of interest, wherein the imaging system comprises a projection data generation unit including a radiation source (2) and a detection unit (6) for acquiring projection data in different angular directions. The projection generation unit is adapted for acquiring projection data in an acquisition region on the detection unit. The imaging system further comprises a reconstruction unit (12) for reconstructing a first image of the region of interest from the acquired projection data and a forward projection unit (13) for forward projecting through the first image of the region of interest for calculating projection data corresponding to regions on the detection unit outside of the acquisition region. The reconstruction unit (12) is adapted for reconstructing a second image of the region of interest from the acquired projection data and from the calculated projection data.
摘要翻译：本发明涉及一种用于对感兴趣区域成像的成像系统，其中该成像系统包括投影数据生成单元，该投影数据生成单元包括用于获取不同角度方向的投影数据的辐射源（2）和检测单元（6）。投影产生单元适于在检测单元上的获取区域中获取投影数据。所述成像系统还包括重建单元（12），用于从所获取的投影数据重构所述感兴趣区域的第一图像;以及前向投影单元（13），用于通过所述感兴趣区域的第一图像向前投影以计算投影数据对应于获取区域外部的检测单元上的区域。重建单元（12）适于从所获取的投影数据和所计算的投影数据中重建感兴趣区域的第二图像。

9. 发明授权

US07961839B2 Advanced convergence for multiple iterative algorithm 有权
标题翻译：多重迭代算法的高级收敛
公开(公告)号：US07961839B2
公开(公告)日：2011-06-14
申请号：US12096911
申请日：2006-12-04
申请人： Andy Ziegler , Michael Grass
发明人： Andy Ziegler , Michael Grass
IPC分类号： A61B6/00
CPC分类号： G06T11/005 , G06T2211/424
摘要： Iterative methods for reconstructing of three-dimensional images based on projection data signals obtained by a computer tomography system often result in wrong absorption coefficients in particular for regions including a hollow space of an object under examination. Furthermore iterative methods show a slow convergence for calculating such absorption coefficients. According to embodiments of the present invention there is provided a method for an advanced reconstruction of three-dimensional images based on modified projection data signals. The modification includes an addition of a constant absorption value to the measured projection data. Advantageously the constant absorption value is an absorption line integral through a virtual body having the spatial constant absorption coefficient of water. The virtual body preferably has a volume which is slightly bigger than the object of interest.
摘要翻译：基于由计算机断层摄影系统获得的投影数据信号重建三维图像的迭代方法通常导致错误的吸收系数，特别是对于包括被检查物体的中空空间的区域。此外，迭代方法显示计算这种吸收系数的缓慢收敛。根据本发明的实施例，提供了一种基于经修改的投影数据信号对三维图像进行高级重建的方法。修改包括对所测量的投影数据添加恒定的吸收值。有利地，恒定吸收值是通过具有水的空间常数吸收系数的虚拟体积分的吸收线。虚拟体优选地具有比感兴趣对象略大的体积。

10. 发明授权

US07676018B2 Efficient iterative four-dimensional cardiac cone-beam CT reconstruction 有权
标题翻译：高效迭代四维心脏锥束CT重建
公开(公告)号：US07676018B2
公开(公告)日：2010-03-09
申请号：US12065615
申请日：2006-09-01
申请人： Michael Grass , Andy Ziegler , Tim Nielsen
发明人： Michael Grass , Andy Ziegler , Tim Nielsen
IPC分类号： A61B6/00
CPC分类号： A61B6/032 , A61B6/027 , A61B6/541 , G06T11/006 , G06T2211/412 , G06T2211/424
摘要： The increasing cone angle of current high-end and future CT systems leads to a decrease in image quality if approximate cone-beam reconstruction methods are used. According to an exemplary embodiment of the present invention, an iterative four-dimensional cardiac CT reconstruction is provided, in which phase volumes are selected from the four-dimensional data set, each having the same spatial volume at different phase points. Corresponding voxels inside these phase volumes are then forward projected onto the same projection. After calculation of a different projection, these voxels are updated. This may provide for an efficient implementation of an iterative four-dimensional cardiac cone-beam CT reconstruction.
摘要翻译：目前高端和未来CT系统锥角的增加导致使用近似锥束重建方法时图像质量下降。根据本发明的示例性实施例，提供了一种迭代的四维心脏CT重建，其中从四维数据集中选择相位体积，每个四维数据集在不同相位处具有相同的空间体积。然后将这些相位体积内的相应体素向前投影到相同的投影上。在计算了不同的投影之后，这些体素被更新。这可以提供迭代四维心脏锥束CT重建的有效实施。

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