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1. 发明申请

US20090310737A1 METHOD FOR COMPUTER TOMOGRAPHY, AND COMPUTER TOMOGRAPH 审中-公开
标题翻译：计算机图形学和计算机图形学的方法
公开(公告)号：US20090310737A1
公开(公告)日：2009-12-17
申请号：US11721543
申请日：2005-12-13
申请人： Peter Forthmann , Thomas Koehler , Robert Manzke , Michael Grass , Andy Ziegler
发明人： Peter Forthmann , Thomas Koehler , Robert Manzke , Michael Grass , Andy Ziegler
IPC分类号： A61B6/00
CPC分类号： A61B6/541 , A61B6/027 , A61B6/032 , A61B6/4085 , A61B6/503
摘要： According to the invention, there is provided a method of recording images of the heart in computer tomography, in which, in order to prevent movement artifacts, the images are reconstructed on the basis of similar movement states of the heart and different radiation intensities are used for different movement states. Also provided is a computer tomograph for recording images of the heart in computer tomography by means of time windows which exhibit similar movement states of the heart in order to prevent movement artifacts, said computer tomograph comprising a control device which controls a radiation source with different radiation intensities for different movement states. Furthermore provided is a computer program for a computer tomograph for recording images of the heart in computer tomography by means of time windows which exhibit similar movement states of the heart in order to prevent movement artifacts, and for controlling a radiation source with different radiation intensities for different movement states.
摘要翻译：根据本发明，提供了一种在计算机断层摄影中记录心脏图像的方法，其中为了防止运动伪像，基于心脏的相似运动状态重建图像，并且使用不同的辐射强度对于不同的运动状态。还提供了一种用于在计算机断层摄影中记录心脏图像的计算机断层摄影装置，其通过显示相似的心脏运动状态以防止运动伪像的时间窗口，所述计算机断层摄影机包括控制具有不同辐射的辐射源的控制装置不同运动状态的强度。此外还提供了一种计算机断层摄影机的计算机程序，用于通过时间窗口在计算机断层摄影中记录心脏的图像，所述时间窗口表现出相似的心脏运动状态以便防止运动伪像，并且用于控制具有不同辐射强度的辐射源不同的运动状态。

2. 发明申请

US20070248253A1 Artifact Reduction 有权
标题翻译：人工减少
公开(公告)号：US20070248253A1
公开(公告)日：2007-10-25
申请号：US11570512
申请日：2005-06-14
申请人： Robert Manzke , Michael Grass , Thomas Koehler
发明人： Robert Manzke , Michael Grass , Thomas Koehler
IPC分类号： G06T11/00
CPC分类号： G06T11/005 , G06T2211/412
摘要： Minimizing the temporal width of the gating window during calculation of the gating function in cardiac CT may not result in best image quality with a maximum of signal-to-noise ratio and minimal artifacts. According to an exemplary embodiment of the present invention, the widths of the gating windows in cardiac CT are selected on the basis of a motion model describing the motion of the heart. According to an aspect of the present invention, the widths of the gating windows are determined by considering the duration of stationary cardiac phases. Thus, artifacts, such as motion artifacts or noise, are minimized.
摘要翻译：在计算心脏CT中门控功能时，最小化选通窗口的时间宽度可能无法以最大的信噪比和最小的人为因素产生最佳图像质量。根据本发明的示例性实施例，基于描述心脏运动的运动模型来选择心脏CT中门控窗口的宽度。根据本发明的一个方面，门控窗口的宽度通过考虑静止心脏相位的持续时间来确定。因此，最小化诸如运动伪像或噪声的伪影。

3. 发明申请

US20070183640A1 Gated cone-beam computed tomography reconstruction with motion compensation 审中-公开
标题翻译：带运动补偿的门控锥束计算机断层扫描重建
公开(公告)号：US20070183640A1
公开(公告)日：2007-08-09
申请号：US10599140
申请日：2005-03-18
申请人： Robert Manzke , Thomas Koehler , Michael Grass , Babak Movassaghi
发明人： Robert Manzke , Thomas Koehler , Michael Grass , Babak Movassaghi
IPC分类号： G06K9/00
CPC分类号： G06T11/005 , G06T2211/412
摘要： E.g. in cardiac cone-beam CT, the source path is interrupted due to the fact that the projection data is gated. According to the present invention, a method is provided to obtain projection data corresponding to an uninterrupted source trajectory from such a gated data set. For this purpose, a motion compensation is applied. Advantageously, a complete data set may be determined allowing for an approximate or an exact reconstruction method to be applied to the completed data set without interruption of the image generation.
摘要翻译：例如。在心脏锥束CT中，由于投影数据被门控的原因，源路径被中断。根据本发明，提供了一种从这种门控数据集获得对应于不中断的源轨迹的投影数据的方法。为此，应用运动补偿。有利地，可以确定完整数据集，允许将近似或精确重建方法应用于完成的数据集而不中断图像生成。

4. 发明授权

US07792347B2 Artifact reduction 有权
标题翻译：人工减少
公开(公告)号：US07792347B2
公开(公告)日：2010-09-07
申请号：US11570512
申请日：2005-06-14
申请人： Robert Manzke , Michael Grass , Thomas Koehler
发明人： Robert Manzke , Michael Grass , Thomas Koehler
IPC分类号： G06K9/00 , A61B6/00 , A61B5/02
CPC分类号： G06T11/005 , G06T2211/412
摘要： Minimizing the temporal width of the gating window during calculation of the gating function in cardiac CT may not result in best image quality with a maximum of signal-to-noise ratio and minimal artifacts. According to an exemplary embodiment of the present invention, the widths of the gating windows in cardiac CT are selected on the basis of a motion model describing the motion of the heart. According to an aspect of the present invention, the widths of the gating windows are determined by considering the duration of stationary cardiac phases. Thus, artifacts, such as motion artifacts or noise, are minimized.
摘要翻译：在计算心脏CT中门控功能时，最小化选通窗口的时间宽度可能无法以最大的信噪比和最小的人为因素产生最佳图像质量。根据本发明的示例性实施例，基于描述心脏运动的运动模型来选择心脏CT中门控窗口的宽度。根据本发明的一个方面，门控窗口的宽度通过考虑静止心脏相位的持续时间来确定。因此，最小化诸如运动伪像或噪声的伪影。

5. 发明授权

US07702063B2 CT method for the examination of cyclically moving object 有权
标题翻译： CT方法检查循环移动物体
公开(公告)号：US07702063B2
公开(公告)日：2010-04-20
申请号：US11719305
申请日：2005-11-07
申请人： Thomas Koehler , Michael Grass
发明人： Thomas Koehler , Michael Grass
IPC分类号： A61B6/00
CPC分类号： A61B6/541 , A61B6/032 , A61B6/4085
摘要： The invention relates to a computer tomography method for the detection of a cyclically moved object in an examination zone. First, after the acquisition of the measured values, a rough image of the examination zone is reconstructed from which a region relevant for the further method is selected. For the generation of an image with reduced motion artifacts or improved temporal resolution, reconstruction windows in predefinable position are used, which are optimized in such a way that they are, on the one hand, smallest possible, on the other hand, however, sufficiently large, to be able to reconstruct all voxels of this region. Only measured values acquired within the reconstruction windows are taken into account for the reconstruction of a CT image of the region.
摘要翻译：本发明涉及一种用于在检查区域中检测循环移动物体的计算机断层摄影方法。首先，在获取测量值之后，重建检查区域的粗略图像，从中选择与该另一方法相关的区域。为了产生具有减少的运动伪影或改进的时间分辨率的图像，使用可预定义位置的重建窗口，其以这样的方式被优化：一方面，尽管如此，另一方面，足够的大，能够重建这个地区的所有体素。仅在重建窗口中获取的测量值被考虑用于重建该区域的CT图像。

6. 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）。

7. 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。

8. 发明申请

US20090208077A1 IMAGING SYSTEM 有权
标题翻译：成像系统
公开(公告)号：US20090208077A1
公开(公告)日：2009-08-20
申请号：US12438559
申请日：2007-08-28
申请人： Claas Bontus , Michael Grass , Thomas Koehler
发明人： Claas Bontus , Michael Grass , Thomas Koehler
IPC分类号： G06K9/00 , A61B6/03
CPC分类号： A61B6/032 , A61B6/027
摘要： The present invention relates to an imaging system for imaging a field of interest, in particular to a computed tomography system. The imaging system comprises an irradiation unit (2) which moves relative to a field of interest along a first trajectory (501) and along a second trajectory (503). While the irradiation unit (2) moves along the first trajectory (501), first detection data are acquired and, while the irradiation unit (2) moves along the second trajectory (503), second detection data are acquired. An intermediate image of the field of interest is reconstructed from at least the second detection data, and virtual detection data are determined by forward projection through the intermediate image. Finally, an image of the field of interest is reconstructed from the first detection data and the virtual detection data.
摘要翻译：本发明涉及用于对感兴趣的领域，特别是计算机断层摄影系统进行成像的成像系统。成像系统包括沿着第一轨迹（501）并沿第二轨迹（503）相对于感兴趣的场移动的照射单元（2）。当照射单元（2）沿着第一轨迹（501）移动时，获取第一检测数据，并且当照射单元（2）沿着第二轨迹（503）移动时，获取第二检测数据。至少从第二检测数据重建感兴趣区域的中间图像，并且通过中间图像的向前投影确定虚拟检测数据。最后，从第一检测数据和虚拟检测数据重建感兴趣区域的图像。

9. 发明申请

US20080267455A1 Method for Movement Compensation of Image Data 审中-公开
标题翻译：图像数据移动补偿方法
公开(公告)号：US20080267455A1
公开(公告)日：2008-10-30
申请号：US12097568
申请日：2006-12-11
申请人： Michael Grass , Thomas Koehler
发明人： Michael Grass , Thomas Koehler
IPC分类号： G06K9/00
CPC分类号： A61B6/032 , A61B6/541 , G06T11/005 , G06T2211/412
摘要： According to an exemplary embodiment a method for movement compensation of image data of an object of interest comprises receiving projection data, receiving motion vector field data, and dividing the motion vector field data into a number of layers of motion vector field data. Furthermore, the method comprises generating motion compensated projection data by projecting at least one of the number of layered motion vector field data onto the projection data and applying a two dimensional motion compensation on the projection, and generating image data of at least one voxel by back-projecting the movement compensated projection data.
摘要翻译：根据示例性实施例，感兴趣对象的图像数据的移动补偿的方法包括接收投影数据，接收运动矢量场数据，以及将运动矢量场数据分成多个运动矢量场数据层。此外，该方法包括通过将多个分层运动矢量场数据中的至少一个投影到投影数据上并在投影上应用二维运动补偿来生成运动补偿投影数据，并且通过返回生成至少一个体素的图像数据 - 投影运动补偿投影数据。

10. 发明申请

US20070127621A1 Asymmetric csct 审中-公开
标题翻译：不对称csct
公开(公告)号：US20070127621A1
公开(公告)日：2007-06-07
申请号：US10575585
申请日：2004-10-05
申请人： Michael Grass , Thomas Koehler
发明人： Michael Grass , Thomas Koehler
IPC分类号： H05G1/60
CPC分类号： A61B6/032 , A61B6/027 , G01N23/046 , G01N2223/419
摘要： According to the present invention, an asymmetric acquisition system is used, where the radiation detector is arranged asymmetrically with respect to a fan beam plane of motor the scanner. Advantageously, this may allow to increase a scatter angle range for a given detector height in the direction of the rotational axis. Furthermore, this may allow for an optimal data flow for a combined volume absorption distribution reconstruction and subsequent coherent scatter CT reconstruction.
摘要翻译：根据本发明，使用非对称采集系统，其中辐射检测器相对于扫描器的电机的扇形光束平面不对称地布置。有利地，这可以允许在旋转轴线的方向上增加给定检测器高度的散射角范围。此外，这可以允许用于组合体积吸收分布重建和随后的相干散射CT重建的最佳数据流。

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