公开(公告)号：WO2012123845A1

公开(公告)日：2012-09-20

申请号：PCT/IB2012/050985

申请日：2012-03-02

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V. ,  PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH ,  ROESSL, Ewald ,  PROKSA, Roland

Inventor： ROESSL, Ewald ,  PROKSA, Roland

IPC: G06T11/00

CPC classification number: G01T7/005 ,  G06T11/005 ,  G06T2211/408

Abstract: A method for processing projection data in the projection domain includes receiving the projection data. The projection data is generated by a spectral detector and includes two or more independent energy-resolved measurements in which at least one of the two or more measurements has first photon statistics. The method further includes generating a de-noised measurement in electronic format for the at least one of the two or more measurements having the first photon statistics. The de-noised measurement has second photon statistics which are better than the first photon statistics.

Abstract translation: 用于处理投影域中的投影数据的方法包括接收投影数据。 投影数据由光谱检测器产生，并且包括两个或多个独立的能量分辨测量，其中两个或更多个测量中的至少一个具有第一光子统计。 该方法还包括以电子格式生成具有第一光子统计量的两个或多个测量中的至少一个的去噪测量。 去噪测量具有比第一光子统计更好的第二光子统计。

公开(公告)号：WO2012080971A1

公开(公告)日：2012-06-21

申请号：PCT/IB2011/055689

申请日：2011-12-15

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V. ,  PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH ,  PROKSA, Roland ,  BRENDEL, Bernhard Johannes ,  KOEHLER, Dr. Thomas

Inventor： PROKSA, Roland ,  BRENDEL, Bernhard Johannes ,  KOEHLER, Dr. Thomas

IPC: G06T11/00

CPC classification number: G06T11/003 ,  G06T11/006 ,  G06T2211/408 ,  G06T2211/424

Abstract: The noise of a detection value acquired by an imaging system (30) can depend on the contributions of different components within a region of interest to be imaged, which has been traversed by radiation (4) causing the respective acquired detection value. This dependence is considered while iteratively reconstructing an image of the region of interest, wherein first component attenuation values, which correspond to elements of a first component within the region of interest, and second component attenuation values, which correspond to elements of a first component within the region of interest, are determined, wherein noise values are determined from the first component attenuation values and the second component attenuation values and wherein the noise values are used for updating the image. This consideration of the dependence of the noise of an acquired detection value on the different components improves the quality of the iteratively reconstructed image.

Abstract translation: 由成像系统（30）获取的检测值的噪声可以取决于被成像的感兴趣区域内的不同部件的贡献，其已被辐射（4）穿过，导致相应的获取的检测值。 考虑这种依赖性，同时迭代地重构感兴趣区域的图像，其中对应于感兴趣区域内的第一分量的元素的第一分量衰减值和对应于第一分量内的第一分量的元素的第二分量衰减值 确定感兴趣区域，其中根据第一分量衰减值和第二分量衰减值确定噪声值，并且其中噪声值用于更新图像。 对所获取的检测值的噪声对不同分量的依赖性的考虑改善了迭代重建图像的质量。

公开(公告)号：WO2011073863A1

公开(公告)日：2011-06-23

申请号：PCT/IB2010/055712

申请日：2010-12-10

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V. ,  PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH ,  KOEHLER, Thomas ,  PROKSA, Roland ,  ROESSL, Ewald

Inventor： KOEHLER, Thomas ,  PROKSA, Roland ,  ROESSL, Ewald

IPC: A61B6/03 ,  G01N23/04 ,  G06T11/00

CPC classification number: A61B6/032 ,  A61B6/469 ,  A61B6/542 ,  G01N23/046 ,  G01N2223/419 ,  G06T11/005 ,  Y10S378/901

Abstract: The invention relates to a computed tomography apparatus for imaging an object. The computed tomography apparatus comprises a radiation source (2) for generating modulated radiation (4) traversing the object and a detector (6) for generating detection values depending on the radiation (4) after having traversed the object, while the radiation source (2) and the object are moved relative to each other. A weight providing unit (14) provides modulation weights for weighting the detection values depending on the modulation of the radiation (4) and a reconstruction unit (15) reconstructs an image of the object, wherein the detection values are weighted based on the provided modulation weights and an image of the object is reconstructed from the weighted detection values. This can allow to optimize the dose application to the object by modulating the radiation accordingly, wherein the reconstructed images still have a high quality.

Abstract translation: 本发明涉及一种用于对物体成像的计算机断层摄影装置。 计算机断层摄影装置包括用于产生经过物体的调制辐射（4）的辐射源（2）和用于在穿过物体之后产生取决于辐射（4）的检测值的检测器（6），而辐射源 ）并且对象相对于彼此移动。 权重提供单元（14）提供调制权重，用于根据辐射（4）的调制对检测值进行加权，重建单元（15）重建对象的图像，其中基于所提供的调制对检测值进行加权 从加权检测值重建对象的权重和图像。 这可以通过相应地调节辐射来优化对物体的剂量应用，其中重建的图像仍然具有高质量。

公开(公告)号：WO2011036624A1

公开(公告)日：2011-03-31

申请号：PCT/IB2010/054256

申请日：2010-09-21

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V. ,  PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH ,  KOEHLER, Thomas ,  PROKSA, Roland

Inventor： KOEHLER, Thomas ,  PROKSA, Roland

IPC: G06T5/50 ,  G06T11/00

CPC classification number: G06T11/008 ,  G06T5/50 ,  G06T2211/421 ,  G06T2211/424

Abstract: 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.

Abstract translation: 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），以及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组合单元（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。

公开(公告)号：WO2009156898A2

公开(公告)日：2009-12-30

申请号：PCT/IB2009/052562

申请日：2009-06-17

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V. ,  PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH ,  PROKSA, Roland

Inventor： PROKSA, Roland

CPC classification number: A61B6/4035 ,  A61B6/032 ,  A61B6/4014 ,  A61B6/4042 ,  A61B6/4241 ,  A61B6/481 ,  A61B6/482 ,  A61B6/504 ,  A61B6/507 ,  A61B6/583 ,  G21K2201/062 ,  G21K2201/064

Abstract: The present invention relates to a medical X-rayexamination apparatus and method for performing k-edge imaging of an object of interest including material showing k- edge absorption. To allow the use of conventional detector technology, which does not suffer from the limitation to provide very high k-rate capabilities a method is proposed comprising the steps of: -emitting polychromatic X-ray radiation (4; 4a, 4b), -Bragg filtering said polychromatic X-rayradiation by a Bragg filter such that radiation (16) transmitted through said Bragg filter (14; 14a, 14b) passes through said object (5), -detecting X-rayradiation after passing through said object (5), -acquiring projection data at at least two different Bragg reflection angles of said Bragg filter (14; 14a, 14b), and -reconstructing a k-edge image from the acquired projection data.

Abstract translation: 本发明涉及一种医用X射线检查装置和方法，用于进行感兴趣对象的k边缘成像，包括显示k边缘吸收的材料。 为了允许使用常规检测器技术，其不受限于提供非常高的k率能力的方法，提出了一种方法，其包括以下步骤： - 发射多色X射线辐射（4; 4a，4b），-Bragg 通过布拉格滤波器对所述多色X射线辐射进行滤波，使得透过所述布拉格滤波器（14; 14a，14b）的辐射（16）穿过所述物体（5）， - 在通过所述物体（5）之后检测X射线辐射， - 在所述布拉格滤波器（14; 14a，14b）的至少两个不同的布拉格反射角处获取投影数据，以及 - 从所获取的投影数据重新构造k边缘图像。

公开(公告)号：WO2009141760A2

公开(公告)日：2009-11-26

申请号：PCT/IB2009/051954

申请日：2009-05-12

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V. ,  PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH ,  ROESSL, Ewald, R ,  PROKSA, Roland

Inventor： ROESSL, Ewald, R ,  PROKSA, Roland

CPC classification number: G01T1/24

Abstract: The invention relates to a detector (100), particularly for X-ray photons, that comprises a converter unit (10) in which incident photons (X) are converted into electrical conduction charges (11) and electrodes (21, 22) that generate an electrical field and at which said charges (11) are collected. Furthermore, it comprises a magnetic field generator (30) for generating a magnetic field (B) inside the converter unit (10) that affects the movement of the electrical conduction charges (11), particularly by restricting possible drifts of the charges in directions perpendicular to the electrical field (E).

Abstract translation: 本发明涉及特别是用于X射线光子的检测器（100），其包括转换器单元（10），其中入射光子（X）转换成导电电荷（11）和电极（21,22），其产生 电场并且收集所述电荷（11）。 此外，它包括用于在转换器单元（10）内产生影响导电电荷（11）的运动的磁场（B）的磁场发生器（30），特别是通过限制电荷在垂直方向上的漂移 到电场（E）。

公开(公告)号：WO2009083848A1

公开(公告)日：2009-07-09

申请号：PCT/IB2008/055264

申请日：2008-12-12

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V. ,  PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH ,  FORTHMANN, Peter ,  PROKSA, Roland ,  THRAN, Axel

Inventor： FORTHMANN, Peter ,  PROKSA, Roland ,  THRAN, Axel

IPC: A61B6/03 ,  G21K1/10

CPC classification number: H01J35/10 ,  A61B6/027 ,  A61B6/032 ,  A61B6/4007 ,  A61B6/4014 ,  A61B6/4021 ,  A61B6/4028 ,  A61B6/4035 ,  A61B6/4266 ,  G21K1/10 ,  H01J35/26 ,  H01J2235/068 ,  H01J2235/086

Abstract: A computed tomography apparatus (10) includes spaced radiation sources (82, 84), such as anodes, which each propagate a cone -beam of radiation (40, 50) into an examination region (14). A detector (22) detects radiation which has passed through the examination region. An attenuation system (55) interposed between the radiation sources and the examination region for cone-angle dependent filtering of the cone beams. The attenuation system allows rays which contribute little to a reconstructed image to be attenuated more than rays which contribute more.

Abstract translation: 计算机断层摄影装置（10）包括间隔开的辐射源（82,84），例如阳极，每个辐射源将辐射（40,50）的锥束传播到检查区域（14）中。 检测器（22）检测已经通过检查区域的辐射。 介于辐射源与锥形束的锥角相关滤波检查区域之间的衰减系统（55）。 衰减系统允许对重建图像贡献很小的光线比有助于更多的光线衰减更多。

公开(公告)号：WO2009027904A2

公开(公告)日：2009-03-05

申请号：PCT/IB2008/053353

申请日：2008-08-21

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V. ,  PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH ,  PROKSA, Roland ,  THRAN, Axel ,  GRASS, Michael

Inventor： PROKSA, Roland ,  THRAN, Axel ,  GRASS, Michael

IPC: A61B6/03

CPC classification number: A61B6/4014 ,  A61B6/027 ,  A61B6/032 ,  A61B6/4028 ,  A61B6/503 ,  A61B6/508 ,  G01T1/1644 ,  H01J2235/00

Abstract: The invention relates to an X-rayimaging system (100) like a CT-scanner. In a preferred embodiment of the system, a cylindrical X-raydetector(130) is sandwiched between two cylindrical X-raysources (110, 120) or vice versa. The X-raysources preferably comprise cathodes with carbon nanotubes and a multitude of focal spots(111) that can selectively be controlled. The cylinder-diameters of the X-raysource and the X-raydetector may be the same or, preferably, be different. Moreover, the X-raysource and the X-ray detector preferably extend circumferentially over less than the full angle of 360°.

Abstract translation: 本发明涉及如CT扫描仪的X射线成像系统（100）。 在该系统的优选实施例中，圆柱形X射线探测器（130）夹在两个圆柱形X射线源（110,120）之间，反之亦然。 X射线源优选包括具有碳纳米管的阴极和可以选择性控制的多个焦点（111）。 X射线源和X射线探测器的圆柱直径可以相同，或者优选不同。 而且，X射线源和X射线探测器优选地在周向上延伸小于360°的全角。

公开(公告)号：WO2008093275A3

公开(公告)日：2008-11-06

申请号：PCT/IB2008050294

申请日：2008-01-28

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  PHILIPS INTELLECTUAL PROPERTY ,  PROKSA ROLAND

Inventor： PROKSA ROLAND

IPC: G01T1/29

CPC classification number: G01T1/2928 ,  A61B6/027

Abstract: Photon counting detectors may suffer from pulse sharing effects and fluorescence photon generation, which may lead to a degradation of the measured signals. According to an exemplary embodiment of the present invention, a detector unit is provided which is adapted for performing a coincidence detection and correction by comparing detection events of neighbouring cells, thereby providing for a coincidence identification followed by an individual coincidence correction. In order to reduce the number of coincidence detection and corresponding units per detector unit, a specific detector cell geometry may be applied.

Abstract translation: 光子计数检测器可能受到脉冲共享效应和荧光光子产生的影响，这可能导致测量信号的退化。 根据本发明的示例性实施例，提供了一种检测器单元，其适于通过比较相邻单元的检测事件来执行一致性检测和校正，由此提供重合识别，随后进行单独重合校正。 为了减少每个检测器单元的重合检测和对应单元的数量，可以应用特定的检测器单元几何形状。

公开(公告)号：WO2008068674A2

公开(公告)日：2008-06-12

申请号：PCT/IB2007054834

申请日：2007-11-29

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  PHILIPS INTELLECTUAL PROPERTY ,  PROKSA ROLAND

Inventor： PROKSA ROLAND

IPC: A61B6/00

CPC classification number: A61B6/504 ,  A61B6/032 ,  A61B6/4241 ,  A61B6/481 ,  A61B6/482 ,  A61B6/507 ,  Y10S378/901

Abstract: The invention relates to a CT imaging system for determining the flow of a substance within an object, wherein the CT imaging system comprises a polychromatic X-ray source and an energy-resolving X-ray detector for obtaining detection signals depending on the X-ray radiation after passing through the object. A calculation unit (12) determines a k-edge 5 component of the substance from the detection signals, and a reconstruction unit (13) reconstructs a time series of k-edge image from the determined k-edge component. A flow determination unit (14) determines flow values indicative for the flow within the object from the time series of k-edge images.

Abstract translation: 本发明涉及一种用于确定物体内物质流动的CT成像系统，其中CT成像系统包括多色X射线源和能量分辨X射线检测器，用于根据X射线获得检测信号 穿过物体后的辐射。 计算单元（12）根据检测信号确定物质的k边缘5分量，重建单元（13）根据确定的k边缘分量重构k边缘图像的时间序列。 流量确定单元（14）根据k边缘图像的时间序列确定指示对象内的流动的流量值。