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91. 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。

92. 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）。

93. 发明授权

US08135197B2 Automatic adaptive soft tissue thresholding for two-pass CT cone-beam artifact reduction 有权
标题翻译：自动适应性软组织阈值二次CT锥束伪影减少
公开(公告)号：US08135197B2
公开(公告)日：2012-03-13
申请号：US12090654
申请日：2006-10-06
申请人： Peter Forthmann , Michael Grass , Roland Proksa
发明人： Peter Forthmann , Michael Grass , Roland Proksa
IPC分类号： A61B6/03
CPC分类号： G06T11/008 , Y10S378/901
摘要： Since the soft tissue levels in an image usually comprise a variety of values between air and bone boundaries, it may not be obvious a priori what threshold value applies. According to an exemplary embodiment of the present invention, an examination apparatus is provided which is adapted for determining the optimal weight for subtraction of a soft tissue correction image without performing a multitude of forward and backward projections. This may be provided determining a roughness function based on a plurality of subtractions of the soft tissue streak image, each subtraction corresponding to a different weighting of the streak image.
摘要翻译：由于图像中的软组织水平通常包含空气和骨骼边界之间的各种值，所以事先显示出什么阈值可能并不明显。根据本发明的示例性实施例，提供一种检查装置，其适于确定用于减去软组织校正图像的最佳权重，而不执行大量向前和向后的投影。可以提供这样来确定基于软组织条纹图像的多个减法的粗糙度函数，每个减法对应于条纹图像的不同加权。

94. 发明申请

US20120001084A1 SPECTRAL IMAGING 有权
标题翻译：光谱成像
公开(公告)号：US20120001084A1
公开(公告)日：2012-01-05
申请号：US13255518
申请日：2010-02-18
申请人： Roland Proksa , Christoph Herrmann , Walter Ruetten
发明人： Roland Proksa , Christoph Herrmann , Walter Ruetten
IPC分类号： G01J1/42 , G01T1/00
CPC分类号： A61B6/4208 , A61B6/032 , A61B6/4014 , A61B6/4042 , A61B6/482 , G01T1/20
摘要： A detector array (110) of an imaging system (100) includes a radiation sensitive detector (114, 116) that detects radiation and generates a signal indicative thereof. A current-to-frequency (I/F) converter (202) converts the signal to a pulse train having a frequency indicative of the signal for an integration period. Circuitry (120) generates a first moment and at least one higher order moment based on the pulse train.
摘要翻译：成像系统（100）的检测器阵列（110）包括检测辐射并产生指示其的信号的辐射敏感检测器（114,116）。电流 - 频率（I / F）转换器（202）将信号转换成具有指示用于积分周期的信号的频率的脉冲串。电路（120）基于脉冲串产生第一时刻和至少一个较高阶矩。

95. 发明授权

US08059787B2 Spectrum-preserving heel effect compensation filter made from the same material as anode plate 有权
标题翻译：光谱保留脚跟效果补偿滤光片由与阳极板相同的材料制成
公开(公告)号：US08059787B2
公开(公告)日：2011-11-15
申请号：US12523164
申请日：2008-01-23
申请人： Peter Forthmann , Roland Proksa
发明人： Peter Forthmann , Roland Proksa
IPC分类号： G21K3/00
CPC分类号： G21K1/10 , A61B6/03 , A61B6/4035 , H01J35/18 , H01J2235/18
摘要： It is described a filter (300) for at least partially compensating for an X-ray tube (10) the target angle heel effect and preserving the tungsten spectrum of the X-rays. The filter (300) has an anode side (302) and a cathode side (304), wherein the cathode side (304) has a higher attenuation coefficient than the anode side (302). The attenuation coefficient is determined to at least partially compensate for the target angle heel effect. The filter (300) is from the same material as an anode plate (110) or the anode (108) of the X-raysource (10) which is usually tungsten or a tungsten alloy.
摘要翻译：描述了用于至少部分地补偿X射线管（10）的目标角跟随效应并保留X射线的钨光谱的滤光器（300）。过滤器（300）具有阳极侧（302）和阴极侧（304），其中阴极侧（304）具有比阳极侧（302）更高的衰减系数。衰减系数被确定为至少部分补偿目标角度后跟效应。过滤器（300）来自与通常为钨或钨合金的X射线源（10）的阳极板（110）或阳极（108）相同的材料。

96. 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。

97. 发明申请

US20110019794A1 ELECTRICAL ISOLATION OF X-RAY SEMICONDUCTOR IMAGER PIXELS 有权
标题翻译： X射线半导体成像像素的电气隔离
公开(公告)号：US20110019794A1
公开(公告)日：2011-01-27
申请号：US12809079
申请日：2008-12-26
申请人： Ewald Roessl , Roland Proksa
发明人： Ewald Roessl , Roland Proksa
IPC分类号： A61B6/03 , H01L27/146
CPC分类号： H01L27/1463 , H01L27/14659
摘要： To mitigate the influence of charge sharing occurring in semiconductor detectors, an improved semiconductor detector (200) is provided, which comprises: a plurality of anodes (210) arranged to form at least one opening (230), each opening being formed by two anodes in the plurality of anodes; at least one cathode (220); a detector cell (240) located between the plurality of anodes and the at least one cathode; wherein the detector cell comprises at least one groove (250), each of the at least one groove having a first opening (252) aligned with one of the at least one opening being formed by two anodes in the plurality of anodes, each of the at least one groove extending towards the at least one cathode. By forming grooves in the detector cell, the charge cloud generated by a single photon can be received by a corresponding anode instead of several neighboring anodes, which thereby improves the spectral resolution and count rate of a semiconductor detector.
摘要翻译：为了减轻在半导体检测器中发生的电荷共享的影响，提供了一种改进的半导体检测器（200），其包括：多个阳极（210），被布置成形成至少一个开口（230），每个开口由两个阳极形成在多个阳极中; 至少一个阴极（220）; 位于所述多个阳极和所述至少一个阴极之间的检测器单元（240）; 其中所述检测器单元包括至少一个凹槽（250），所述至少一个凹槽中的每个凹槽具有与所述多个阳极中的两个阳极形成的所述至少一个开口中的一个开口对准的第一开口（252）至少一个凹槽，朝向所述至少一个阴极延伸。通过在检测器单元中形成凹槽，由单个光子产生的电荷云可由相应的阳极代替几个相邻的阳极来接收，从而提高半导体检测器的光谱分辨率和计数率。

98. 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。

99. 发明授权

US07668289B2 Energy-resolved photon counting for CT 失效
标题翻译： CT的能量分辨光子计数
公开(公告)号：US07668289B2
公开(公告)日：2010-02-23
申请号：US11912689
申请日：2006-04-25
申请人： Roland Proksa , Michael Grass
发明人： Roland Proksa , Michael Grass
IPC分类号： A61B6/03
CPC分类号： G01T1/2985 , G01N23/046 , G01N2223/419 , G01V5/0041 , G01V5/005
摘要： Spectral CT systems require cheap detectors with high energy resolution. According to an aspect of the present invention, a computer tomography apparatus comprises a detector element which is segmented into a plurality of sub-pixels. Each sub-pixel has at least two thresholds and counting channels, wherein the second threshold for each sub-pixel varies over the nominal detector element. This may provide for an improved energy-resolved photon counting.
摘要翻译：光谱CT系统需要具有高能量分辨率的廉价检测器。根据本发明的一个方面，计算机断层摄影装置包括被分割成多个子像素的检测器元件。每个子像素具有至少两个阈值和计数通道，其中每个子像素的第二阈值在标称检测器元件上变化。这可以提供改进的能量分辨光子计数。

100. 发明申请

US20090310736A1 ENERGY SPECTRUM RECONSTRUCTION 有权
标题翻译：能源光谱重建
公开(公告)号：US20090310736A1
公开(公告)日：2009-12-17
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： H05G1/64 , G01T1/29 , H05G1/60
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。

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