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81. 发明申请

US20130259191A1 POST-PATIENT DYNAMIC FILTER FOR COMPUTED TOMOGRAPHY (CT) 有权
标题翻译：用于计算机图像（CT）的患者动态过滤器
公开(公告)号：US20130259191A1
公开(公告)日：2013-10-03
申请号：US13992302
申请日：2011-12-02
申请人： Thomas Koehler , Holger Schmidt , Roland Proksa
发明人： Thomas Koehler , Holger Schmidt , Roland Proksa
IPC分类号： A61B6/00
CPC分类号： A61B6/4035 , A61B6/032 , A61B6/06 , A61B6/4241 , A61B6/4291 , A61B6/488 , A61B6/544 , G21K1/10
摘要： An imaging system includes a radiation source (310) configured to rotate around an examination region about a z-axis and having a focal spot that emits a radiation beam that traverses the examination region. The system further includes a radiation sensitive detector array (314) with a plurality of detector pixels that detects radiation traversing the examination region and generates projection data indicative of the detected radiation. The system further includes a dynamic post-patient filter (316) including one or more filter segments (402, 802, 902, 1004, 1102). The filter is configured to selectively and dynamically move in front of the detector array between the detector array and the examination region and into and out of a path of the radiation beam illuminating the detector pixels during scanning an object or subject based on a shape of the object or subject, thereby filtering unattenuated radiation and radiation traversing a periphery of the object or subject.
摘要翻译：成像系统包括被配置为围绕z轴围绕检查区域旋转并具有发射穿过检查区域的辐射束的焦点的辐射源（310）。该系统还包括具有多个检测器像素的辐射敏感检测器阵列（314），其检测穿过检查区域的辐射，并产生指示检测到的辐射的投影数据。该系统还包括动态的患者后过滤器（316），其包括一个或多个过滤器段（402,802,902,1004,1102）。滤波器被配置为在检测器阵列和检查区域之间选择性地和动态地在检测器阵列之前移动，并且在扫描对象或被摄体期间，在扫描对象或被摄体期间进入和离开照射检测器像素的辐射束的路径，物体或物体，从而过滤未被衰减的辐射和穿过物体或物体的周边的辐射。

82. 发明申请

US20130202166A1 APPARATUS AND METHOD FOR HYBRID RECONSTRUCTION OF AN OBJECT FROM PROJECTION DATA 有权
标题翻译：投影数据混合重构对象的装置和方法
公开(公告)号：US20130202166A1
公开(公告)日：2013-08-08
申请号：US13879655
申请日：2011-10-17
申请人： Thomas Koehler , Axel Thran
发明人： Thomas Koehler , Axel Thran
IPC分类号： G06T5/00
CPC分类号： G06T5/001 , G06T11/006 , G06T2211/421 , G06T2211/424
摘要： The invention relates to an imaging apparatus for imaging an object of interest. An analytical reconstruction unit (12) analytically reconstructs an analytical image of the object from detection data, in particular, from projection data, and an iterative reconstruction unit (13) iteratively reconstructs an iterative image of the object from the detection data, wherein a combination unit (14) combines the analytical image and the iterative image for generating a combination image. An iterative image can comprises shading artifacts, which may be caused by preprocessing the detection data before performing the iterative reconstruction. An analytical image shows reduced shading artifacts, in particular, shows no shading artifacts at all. Thus, by combining the analytical image and the iterative image a combination image can be generated, in which the shading artifacts are reduced in comparison to an iterative image, thereby improving the quality of the reconstructed final image of the object of interest.
摘要翻译：本发明涉及一种用于对感兴趣对象进行成像的成像装置。分析重建单元（12）特别是从投影数据中分析地从检测数据重建对象的分析图像，迭代重建单元（13）从检测数据中迭代地重建对象的迭代图像，其中组合单元（14）组合分析图像和用于生成组合图像的迭代图像。迭代图像可以包括遮蔽伪像，这可能是由于在执行迭代重构之前对检测数据进行预处理而引起的。分析图像显示减少的着色伪像，特别是根本不显示阴影伪影。因此，通过组合分析图像和迭代图像，可以生成组合图像，其中与迭代图像相比减少了阴影伪像，从而提高了感兴趣对象的重建的最终图像的质量。

83. 发明授权

US08396274B2 Imaging system 有权
标题翻译：成像系统
公开(公告)号：US08396274B2
公开(公告)日：2013-03-12
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
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。

84. 发明申请

US20120294414A1 COMPUTED TOMOGRAPHY APPARATUS 有权
标题翻译：计算机摄影装置
公开(公告)号：US20120294414A1
公开(公告)日：2012-11-22
申请号：US13503870
申请日：2010-10-26
申请人： Thomas Koehler
发明人： Thomas Koehler
IPC分类号： A61B6/03 , G21K1/02
CPC分类号： A61B6/032 , A61B6/4035 , A61B6/4233 , A61B6/5264 , A61B6/542 , G06T11/006
摘要： The invention relates to a computed tomography apparatus comprising a radiation source (2) and a detector (6) for generating detection values depending on a conical radiation beam (4). A weight providing unit (12) provides, for combinations of voxels of an image and detection values, weights for weighting the detection values, and a beam shaper shapes the conical radiation beam (4) such that for at least a part of the detection values the inverse of the variance of a respective detection value is positively correlated with an average of the weights corresponding to the combinations of the voxels, which correspond to the respective detection value, and the respective detection value. This shaping of the conical radiation beam improves the signal-to-noise ratio of the weighted detection values.
摘要翻译：本发明涉及一种包括辐射源（2）和检测器（6）的计算机断层摄影装置，用于根据锥形辐射束（4）产生检测值。权重提供单元（12）为图像的体素和检测值的组合提供用于加权检测值的权重，并且束形成器使得锥形辐射束（4）成形，使得对于至少一部分检测值相应检测值的方差的逆与与对应于各个检测值的体素的组合对应的权重的平均值以及相应的检测值正相关。锥形辐射束的这种成形改善了加权检测值的信噪比。

85. 发明申请

US20120177274A1 SYSTEM AND METHOD FOR GENERATING AN IMAGE OF A REGION OF INTEREST 失效
标题翻译：用于生成兴趣区域的图像的系统和方法
公开(公告)号：US20120177274A1
公开(公告)日：2012-07-12
申请号：US13394819
申请日：2010-09-21
申请人： Thomas Koehler , Roland Proksa
发明人： Thomas Koehler , Roland Proksa
IPC分类号： G06K9/46
CPC分类号： G06T11/008 , G06T5/50 , G06T2211/421 , G06T2211/424
摘要： The invention relates to an image generation system for generating an image of a region of interest. The image generation system comprises a measured data providing unit for providing measured data of the region of interest, a reconstruction unit (12) for reconstructing a first and a second image of the region of interest from the measured data using a first and a second reconstruction method, a noise determination unit (13) for determining first and second noise values for first and second image elements of the first and second image, and an image element combining unit (14) for combining corresponding first and second image elements into combined image elements forming a combined image based on the first and second noise values. By combining corresponding image elements of two differently reconstructed images based on determined noise values, a combined image of a region of interest can be generated with an improved quality.
摘要翻译：本发明涉及一种用于产生感兴趣区域的图像的图像生成系统。图像生成系统包括测量数据提供单元，用于提供感兴趣区域的测量数据;重建单元（12），用于使用第一和第二重构从所测量的数据重构感兴趣区域的第一和第二图像方法，用于确定第一和第二图像的第一和第二图像元素的第一和第二噪声值的噪声确定单元（13）和用于将对应的第一和第二图像元素组合成组合图像元素的图像元素合成单元（14）基于第一和第二噪声值形成组合图像。通过基于确定的噪声值组合两个不同重建图像的相应图像元素，可以以改进的质量生成感兴趣区域的组合图像。

86. 发明申请

US20120141006A1 RECONSTRUCTION OF A REGION-OF-INTEREST IMAGE 有权
标题翻译：重建区域图像
公开(公告)号：US20120141006A1
公开(公告)日：2012-06-07
申请号：US13388068
申请日：2010-07-09
申请人： Thomas Koehler , Claas Bontus
发明人： Thomas Koehler , Claas Bontus
IPC分类号： G06K9/00
CPC分类号： G06T11/006 , A61B6/5258 , G06T2211/424 , G06T2211/432
摘要： A method and system to perform region-of-interest (ROI) reconstruction is provided, even if the original projection data are truncated. The reconstruction is performed on a superset of the ROI, including the ROI as well as other areas which are outside the scan field-of-view of the imaging system but still within the imaging bore.
摘要翻译：即使原始投影数据被截断，也提供了执行感兴趣区域（ROI）重构的方法和系统。重建在ROI的超集上执行，包括ROI以及在成像系统的扫描视场外但仍在成像孔内的其它区域。

87. 发明授权

US08184891B2 Imaging system, imaging method and computer program for imaging a region of interest 有权
标题翻译：成像系统，成像方法和用于对感兴趣区域成像的计算机程序
公开(公告)号：US08184891B2
公开(公告)日：2012-05-22
申请号：US12445761
申请日：2007-10-12
申请人： Thomas Koehler , Roland Proksa
发明人： Thomas Koehler , Roland Proksa
IPC分类号： G06K9/00
CPC分类号： G06T11/005 , G06T2211/421
摘要： The present invention relates to an imaging system for imaging a region of interest comprising an illumination unit and a detection unit. The imaging system further comprises a grouping unit for grouping the detection values, wherein each group comprises at least one alpha detection value and at least one beta detection value (103). At least one alpha aperture weighting value for the at least one alpha detection value of a group is determined by using at least one position of at least one ray within the aperture (104). Furthermore, at least one beta aperture weighting value for the at least one beta detection value of a group is approximately determined using the at least one alpha aperture weighting value of the group (105). The detection values are than aperture weighted using aperture weighting values (106). The region of interest is reconstructed by backprojecting the weighted detection values (107).
摘要翻译：本发明涉及一种用于对包括照明单元和检测单元的感兴趣区域成像的成像系统。成像系统还包括用于对检测值进行分组的分组单元，其中每组包括至少一个α检测值和至少一个β检测值（103）。通过使用孔径（104）内的至少一个射线的至少一个位置来确定组的至少一个α检测值的至少一个α孔径权重值。此外，使用组（105）的至少一个阿尔法孔径权重值近似确定组的至少一个β检测值的至少一个β孔径加权值。检测值比使用孔径加权值的孔径加权（106）。通过反投影加权检测值来重建感兴趣区域（107）。

88. 发明授权

US08166249B2 Performing a least recently used (LRU) algorithm for a co-processor 失效
标题翻译：对协处理器执行最近使用的（LRU）算法
公开(公告)号：US08166249B2
公开(公告)日：2012-04-24
申请号：US12399416
申请日：2009-03-06
申请人： Thomas Koehler , Siegmund Schlechter
发明人： Thomas Koehler , Siegmund Schlechter
IPC分类号： G06F12/00
CPC分类号： G06F12/123 , G06F12/1027
摘要： A method to perform a least recently used (LRU) algorithm for a co-processor is described, which co-processor in order to directly use instructions of a core processor and to directly access a main storage by virtual addresses of said core processor comprises a TLB for virtual to absolute address translations plus a dedicated memory storage also including said TLB, wherein said TLB consists of at least two zones which can be assigned in a flexible manner more than one at a time. Said method to perform a LRU algorithm is characterized in that one or more zones are replaced dependent on an actual compression service call (CMPSC) instruction.
摘要翻译：描述了为协处理器执行最近最少使用（LRU）算法的方法，其中为了直接使用核心处理器的指令并且通过所述核心处理器的虚拟地址直接访问主存储器的协处理器包括用于虚拟到绝对地址转换的TLB以及还包括所述TLB的专用存储器存储器，其中所述TLB由至少两个可以以多于一个的灵活方式分配的区域组成。所述执行LRU算法的方法的特征在于，取决于实际压缩服务呼叫（CMPSC）指令来替换一个或多个区域。

89. 发明授权

US07970195B2 Method and device for the iterative reconstruction of tomographic images 有权
标题翻译：断层图像迭代重建的方法和装置
公开(公告)号：US07970195B2
公开(公告)日：2011-06-28
申请号：US11908294
申请日：2006-03-07
申请人： Andy Ziegler , Thomas Koehler , Roland Proksa
发明人： Andy Ziegler , Thomas Koehler , Roland Proksa
IPC分类号： G06K9/00
CPC分类号： G06T11/006 , G06T2211/424
摘要： The invention relates to a device and a method for the iterative reconstruction of the attenuation coefficients μj in a tomographic image of an object (1) from projection measurements mi. In the update equation for μjn during the n-th iteration the backprojected error (mi−mi−(μjn)) is weighted by a voxel dependent factor Formula (I). Such a voxel dependent update may particularly be included in the algorithms of ART or ML.
摘要翻译：本发明涉及一种用于从投影测量mi在物体（1）的断层图像中迭代重建衰减系数μj的装置和方法。在第n次迭代期间的μjn的更新方程中，反投影误差（mi-mi-（μjn））由体素因子因子公式（I）加权。这种体素相关更新可以特别地包括在ART或ML的算法中。

90. 发明申请

US20100322514A1 APPARATUS, METHOD AND COMPUTER PROGRAM FOR PRODUCING A CORRECTED IMAGE OF A REGION OF INTEREST FROM ACQUIRED PROJECTION DATA 失效
标题翻译：用于生成来自获取的投影数据的利益区域的校正图像的装置，方法和计算机程序
公开(公告)号：US20100322514A1
公开(公告)日：2010-12-23
申请号：US12521599
申请日：2007-12-19
申请人： Thomas Koehler
发明人： Thomas Koehler
IPC分类号： G06K9/34
CPC分类号： G06T11/005 , A61B6/5258
摘要： The present invention relates to an apparatus for producing a corrected image of a region of interest from acquired projection data (60), wherein an uncorrected intermediate image (74) is reconstructed. The uncorrected intermediate image (74) is corrected and image elements of the corrected intermediate image (85) are classified. Image elements of the corrected 5 intermediate image (85) that are of a high density or low density class are replaced by image elements having values depending on values of the low density class to generate a synthetic image (90). Synthetic projection data (96) are generated by forward projecting the synthetic image (90), and acquired projection data contributing to the high density class are replaced by corresponding synthetic projection data (96) to generate corrected projection data (112). 10 The corrected projection data (112) are used for reconstructing the corrected image.
摘要翻译：本发明涉及一种用于从所获取的投影数据（60）产生感兴趣区域的校正图像的装置，其中重建未校正的中间图像（74）。对未校正的中间图像（74）进行校正，校正的中间图像（85）的图像元素被分类。具有高密度或低密度等级的校正的5中间图像（85）的图像元素由具有取决于低密度等级的值的值的图像元素代替以产生合成图像（90）。合成投影数据（96）通过前向投影合成图像（90）产生，并且由相应的合成投影数据（96）代替有助于高密度等级的获取的投影数据以产生校正投影数据（112）。校正投影数据（112）用于重建校正图像。

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