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61. 发明申请

WO2011070519A1 SCANNING SYSTEM FOR DIFFERENTIAL PHASE CONTRAST IMAGING 审中-公开
标题翻译：扫描系统进行差分相位成像
公开(公告)号：WO2011070519A1
公开(公告)日：2011-06-16
申请号：PCT/IB2010/055662
申请日：2010-12-08
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , ENGEL, Klaus Jürgen , GELLER, Dieter , VOGTMEIER, Gereon , KOEHLER, Thomas
发明人： ENGEL, Klaus Jürgen , GELLER, Dieter , VOGTMEIER, Gereon , KOEHLER, Thomas
IPC分类号： A61B6/00
CPC分类号： A61B6/00 , A61B6/032 , A61B6/4291 , A61B6/484 , A61B6/488 , A61B6/5241
摘要： The invention relates to the field of X-ray differential phase contrast imaging. For scanning large objects and for an improved contrast to noise ration, an X-ray device (10) for imaging an object (18) is provided. The X-ray device (10) comprises an X-ray emitter arrangement (12) and an X-ray detector arrangement (14), wherein the X-ray emitter arrangement (14) is adapted to emit an X-ray beam (16) through the object (18) onto the X-ray detector arrangement (14). The X-ray beam (16) is at least partial spatial coherent and fan- shaped. The X-ray detector arrangement (14) comprises a phase grating (50) and an absorber grating (52). The X-ray detector arrangement (14) comprises an area detector (54) for detecting X- rays, wherein the X-ray device is adapted to generate image data from the detected X-rays and to extract phase information from the X-ray image data, the phase information relating to a phase shift of X-rays caused by the object (18). The object (18) has a region of interest (32) which is larger than a detection area of the X-ray detector (18) and the X-ray device (10) is adapted to generate image data of the region of interest (32) by moving the object (18) and the X-ray detector arrangement (14) relative to each other.
摘要翻译：本发明涉及X射线差分相位成像领域。为了扫描大型物体并改善与噪音比较的对比度，提供了用于对物体（18）成像的X射线装置（10）。 X射线装置（10）包括X射线发射器装置（12）和X射线检测器装置（14），其中X射线发射器装置（14）适于发射X射线束（16））通过物体（18）到X射线检测器装置（14）上。 X射线束（16）至少是部分空间相干和扇形的。 X射线检测器装置（14）包括相位光栅（50）和吸收光栅（52）。 X射线检测器装置（14）包括用于检测X射线的区域检测器（54），其中X射线装置适于从检测到的X射线产生图像数据，并从X射线图像数据，与由对象（18）引起的X射线的相移相关的相位信息。物体（18）具有大于X射线检测器（18）的检测区域的感兴趣区域（32），并且X射线装置（10）适于产生感兴趣区域的图像数据（ 32）通过相对于彼此移动物体（18）和X射线检测器装置（14）。

62. 发明申请

WO2010041193A3 METHOD AND APPARATUS TO IMPROVE CT IMAGE ACQUISITION USING A DISPLACED GEOMETRY 审中-公开
公开(公告)号：WO2010041193A3
公开(公告)日：2010-04-15
申请号：PCT/IB2009/054353
申请日：2009-10-05
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , FORTHMANN, Peter , KOEHLER, Thomas , VAN STEVENDAAL, Udo , BERTRAM, Matthias , WIESNER, Steffen , SCHRETTER, Colas
发明人： FORTHMANN, Peter , KOEHLER, Thomas , VAN STEVENDAAL, Udo , BERTRAM, Matthias , WIESNER, Steffen , SCHRETTER, Colas
IPC分类号： G01N23/04 , A61B6/03
摘要： A method and apparatus are provided to improve CT image acquisition using a displaced acquisition geometry. A CT apparatus may be used having a source (102) and a detector (104) transversely displaced from a center (114) of a field of view (118) during acquisition of the projection data. The amount of transverse displacement may be determined based on the size of the object (108). The source and the detector may be adjusted to vary the size of the transverse field of view. The first data set acquired by the detector may be reconstructed and used to simulate missing projection data that could not be acquired by the detector at each projection angle. The measured projection data and the simulated projection data may be used to obtain a second data set. The second data set may be compared to the first data set to produce a corrected data set.

63. 发明申请

WO2009034508A2 IMAGE PROCESSING WITH COMPUTER AIDED DETECTION AND/OR DIAGNOSIS 审中-公开
标题翻译：具有计算机辅助检测和/或诊断的图像处理
公开(公告)号：WO2009034508A2
公开(公告)日：2009-03-19
申请号：PCT/IB2008/053611
申请日：2008-09-05
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , KOEHLER, Thomas , WIEMKER, Rafael
发明人： KOEHLER, Thomas , WIEMKER, Rafael
CPC分类号： G06T7/0012 , G06T11/008 , G06T2207/10072 , G06T2207/30064
摘要： The invention relates to a method and an image processing device (10) for the evaluation of image raw-data of a body region generated with an imaging device like a CT scanner (30). From the image raw-data, a first image (I CAD ) is reconstructed with a reconstruction module (12) according to reconstruction parameters (p) set optimally by a computer aided detection and/or diagnosis (CAD) module (13). This module can then evaluate an image (I CAD ) that was reconstructed optimally according to its own requirements, for example with respect to image size and/or resolution, to find features of interest.
摘要翻译：本发明涉及一种用于评估由诸如CT扫描仪（30）的成像装置生成的身体区域的图像原始数据的方法和图像处理装置（10）。根据图像原始数据，根据由计算机辅助检测和/或诊断（CAD）模块（13）最佳设置的重建参数（p），利用重建模块（12）重建第一图像（ICAD）。然后，该模块可以根据其自己的要求（例如关于图像尺寸和/或分辨率）评估被最优化地重建的图像（ICAD），以找到感兴趣的特征。

64. 发明申请

WO2008152593A3 APPARATUS FOR DETERMINING A HIGH DENSITY REGION IN AN IMAGE 审中-公开
公开(公告)号：WO2008152593A3
公开(公告)日：2008-12-18
申请号：PCT/IB2008/052308
申请日：2008-06-11
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , FORTMANN, Peter , KOEHLER, Thomas , SCHMITT, Holger
发明人： FORTMANN, Peter , KOEHLER, Thomas , SCHMITT, Holger
IPC分类号： G06T11/00
摘要： The invention relates to an apparatus for determining a high density region in an image, wherein the apparatus comprises a provision unit (1, 2, 6, 7, 8) for providing projection data for reconstructing the image. The apparatus comprises further a high density shadow determination unit (12) for determining a high density shadow in the projection data and a backprojection unit (13) for backprojecting the determined high density shadow resulting in a high density image showing the high density region. The inventions relates further to a corresponding method and computer program for determining a high density region in an image.

65. 发明申请

WO2008047308A1 HIGH-FREQUENCY SADDLE-TRAJECTORY FOR AXIAL CARDIAC CT 审中-公开
标题翻译：用于轴向心脏CT的高频脊索
公开(公告)号：WO2008047308A1
公开(公告)日：2008-04-24
申请号：PCT/IB2007/054211
申请日：2007-10-16
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , BONTUS, Claas , PROKSA, Roland , KOEHLER, Thomas
发明人： BONTUS, Claas , PROKSA, Roland , KOEHLER, Thomas
IPC分类号： A61B6/03
CPC分类号： A61B6/503 , A61B6/027 , A61B6/032 , A61B6/4021 , A61B6/4085 , A61B6/541
摘要： If, in cardiac CT, the time window becomes shorter than the time required for a complete rotation of the gantry, the volume that can be reconstructed becomes small due to the non-existence of related pi- lines. According to an exemplary embodiment of the present invention, an examination apparatus is provided which generates a radiation beam oscillating in z-direction with an oscillation frequency higher than the rotational frequency of the source. This may provide for an exact image reconstruction of large volumes.
摘要翻译：如果在心脏CT中，时间窗口变得比台架完全旋转所需的时间短，则由于不存在相关的引线，可以重构的体积变小。根据本发明的示例性实施例，提供了一种检查装置，其产生以比源的旋转频率高的振荡频率在z方向上振荡的辐射束。这可以提供大体积的精确图像重建。

66. 发明申请

WO2008047279A1 IMAGING SYSTEM, IMAGING METHOD AND COMPUTER PROGRAM FOR IMAGING A REGION OF INTEREST 审中-公开
标题翻译：成像系统，成像方法和计算机程序，用于成像一个利益区域
公开(公告)号：WO2008047279A1
公开(公告)日：2008-04-24
申请号：PCT/IB2007/054153
申请日：2007-10-12
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , KOEHLER, Thomas , PROKSA, Roland
发明人： KOEHLER, Thomas , PROKSA, Roland
IPC分类号： G06T11/00
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）。

67. 发明申请

WO2012077027A1 POST-PATIENT DYNAMIC FILTER FOR COMPUTED TOMOGRAPHY (CT) 审中-公开
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：WO2012077027A1
公开(公告)日：2012-06-14
申请号：PCT/IB2011/055435
申请日：2011-12-02
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , KOEHLER, Thomas , SCHMITT, Holger , PROKSA, Roland
发明人： KOEHLER, Thomas , PROKSA, Roland
IPC分类号： A61B6/03 , A61B6/06 , G01N23/04 , G21K1/10
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。

68. 发明申请

WO2012077014A1 METHOD OF PROVIDING A DISPLAYABLE PIXEL DATA SET FROM MEASUREMENT DATA PROVIDED BY A DIFFERENTIAL PHASE CONTRAST X-RAY IMAGING SYSTEM 审中-公开
标题翻译：通过差分相位X射线成像系统提供的测量数据提供可显示像素数据的方法
公开(公告)号：WO2012077014A1
公开(公告)日：2012-06-14
申请号：PCT/IB2011/055305
申请日：2011-11-25
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , WIEMKER, Rafael , CARLSEN, Ingwer-Curt , RÖSSL, Ewald , MARTENS, Gerhard , KOEHLER, Thomas
发明人： WIEMKER, Rafael , CARLSEN, Ingwer-Curt , RÖSSL, Ewald , MARTENS, Gerhard , KOEHLER, Thomas
IPC分类号： G06T11/00
CPC分类号： G06T11/001 , G06T2207/10116
摘要： A method for providing a displayable pixel data set (11) from measurement data (3) provided by a differential phase-contrast X-ray imaging system (1) and a device (7) adapted to perform such method are proposed. The measurement data (3) comprise three types of measurement information: an absorption representing image data set A, a differential phase-contrast representing image data set D and a coherence representing image data set C. Each of the image data sets A, D and C comprises a 2-dimensional or 3-dimensional set of pixels (5) and the three image data sets are spatially aligned with each other. In the method for providing a displayable pixel data set, a colour value corresponding to a position in a 3- dimensional colour space (9) is attributed to each pixel (13) in the displayable pixel data set (11), wherein each of three coordinates HSI of the position in the 3-dimensional colour space (9) is determined based on data values A ij , D ij , C ij of a corresponding pixel (5) in a respective one of the image data sets A, D, C. For example, the coordinates within the colour space (9) may be indicated by an intensity I, a saturation S and a hue H thereby allowing a very intuitive representation of the complex DPCI measurement data to a human observer.
摘要翻译：提出了一种从由差分相位对比度X射线成像系统（1）提供的测量数据（3）和适于执行该方法的装置（7）提供可显示像素数据组（11）的方法。测量数据（3）包括三种类型的测量信息：表示图像数据组A的吸收，表示图像数据组D的差分相位对照和表示图像数据组C的相干。每个图像数据组A，D和 C包括2维或3维像素集合（5），并且三个图像数据集在空间上彼此对准。在提供可显示像素数据集的方法中，与可显示像素数据集合（11）中的每个像素（13）相对应的与三维颜色空间（9）中的位置相对应的颜色值，其中三个基于图像数据组A，D，C的相应一个中的对应像素（5）的数据值A ij，D ij，C ij确定三维颜色空间（9）中的位置的坐标HSI 例如，颜色空间（9）内的坐标可以由强度I，饱和度S和色调H来表示，从而允许对人类观察者的复杂DPCI测量数据的非常直观的表示。

69. 发明申请

WO2012073167A1 ITERATIVE RECONSTRUCTION ALGORITHM WITH A CONSTANT VARIANCE BASED WEIGHTING FACTOR 审中-公开
标题翻译：基于恒定变量因子的迭代重构算法
公开(公告)号：WO2012073167A1
公开(公告)日：2012-06-07
申请号：PCT/IB2011/055307
申请日：2011-11-25
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , BRENDEL, Bernhard Johannes , KOEHLER, Thomas , SCHMITT, Holger , BIPPUS, Rolf Dieter , PROKSA, Roland
发明人： BRENDEL, Bernhard Johannes , KOEHLER, Thomas , SCHMITT, Holger , BIPPUS, Rolf Dieter , PROKSA, Roland
IPC分类号： G06T11/00
CPC分类号： G06T11/003 , G06T11/006 , G06T2211/424
摘要： A method includes reconstructing measured projection data using an iterative statistical reconstruction algorithm that reduces image artifact caused by differences in variances in projections of the measured projection data used to update a voxel of the image for one or more voxels of the image. A reconstructor includes a processor that reconstructs measured projection data using an iterative statistical reconstruction algorithm that reduces or mitigates image artifact caused by differences in variances in projections used to update a voxel of the image for one or more voxels of the image. A computer readable storage medium encoded with computer executable instructions, which, when executed by a processor of a computer, cause the processor to: reduce image artifact caused by differences in variances in projections used to update a voxel of an image for one or more voxels of the image using an iterative statistical reconstruction algorithm.
摘要翻译：一种方法包括使用迭代统计重建算法来重建测量的投影数据，所述迭代统计重构算法减少由用于更新图像的一个或多个体素的图像的体素的测量投影数据的投影方差的差异引起的图像伪像。重构器包括使用迭代统计重构算法来重建测量的投影数据的处理器，其减少或减轻由用于更新图像的一个或多个体素的图像的体素的投影方差的差异引起的图像伪像。一种用计算机可执行指令编码的计算机可读存储介质，其在由计算机的处理器执行时使处理器能够：减少由用于更新一个或多个体素的图像的体素的投影方差的差异引起的图像伪像的图像使用迭代统计重建算法。

70. 发明申请

WO2012069964A1 FORWARD PROJECTION APPARATUS 审中-公开
标题翻译：前进投影装置
公开(公告)号：WO2012069964A1
公开(公告)日：2012-05-31
申请号：PCT/IB2011/055123
申请日：2011-11-16
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , KOEHLER, Thomas , BRENDEL, Bernhard, Johannes , SCHMITT, Holger , BIPPUS, Rolf Dieter
发明人： KOEHLER, Thomas , BRENDEL, Bernhard, Johannes , SCHMITT, Holger , BIPPUS, Rolf Dieter
IPC分类号： G06T11/00
CPC分类号： G06T11/005 , G06T11/008 , G06T2211/424
摘要： The invention relates to a forward projection apparatus for performing a forward projection through an image (22), wherein at least one of a number of rays (20, 21) for performining the forward projection, a ray spacing between the rays and a kernel width of an interpolation kernel for calculating interpolated values located on the rays is varied depending on the ray width relative to an effective image element spacing between image elements (24) of the image. This allows reducing artifacts in simulated projection data and, thus, in an image, which is iteratively reconstructed by using the simulated projection data. For example, if the number of provided rays and/or the ray spacing between the provided rays is varied, aliasing artifacts can be reduced. Moreover, if the ray spacing between the provided rays and/or the kernel width of the interpolation kernel is varied, artifacts caused by varying effective kernel widths may be reduced.
摘要翻译：本发明涉及一种用于通过图像（22）执行向前投影的前投投影装置，其中，用于执行向前投影的多个光线（20,21）中的至少一个，光线之间的光线间隔和核宽度用于计算位于光线上的内插值的插值内核根据相对于图像的图像元素（24）之间的有效图像元素间隔的光线宽度而变化。这允许减少模拟投影数据中的伪影，并因此减少通过使用模拟投影数据迭代重建的图像。例如，如果提供的光线的数量和/或所提供的光线之间的光线间隔变化，则可以减少混叠伪影。此外，如果所提供的光线之间的光线间距和/或内插核的内核宽度发生变化，则可能会降低由变化的有效内核宽度引起的伪影。

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