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31. 发明申请

WO2009083920A1 ELECTRICAL ISOLATION OF X-RAY SEMICONDUCTOR IMAGER PIXELS 审中-公开
标题翻译： X射线半导体成像像素的电气隔离
公开(公告)号：WO2009083920A1
公开(公告)日：2009-07-09
申请号：PCT/IB2008/055539
申请日：2008-12-26
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , ROESSL, Ewald , PROKSA, Roland
发明人： ROESSL, Ewald , PROKSA, Roland
IPC分类号： 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。

32. 发明申请

WO2009004571A1 METHOD AND APPARATUS FOR IMAGE RECONSTRUCTION 审中-公开
标题翻译：图像重建方法与装置
公开(公告)号：WO2009004571A1
公开(公告)日：2009-01-08
申请号：PCT/IB2008/052632
申请日：2008-07-01
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , FORTHMANN, Peter , PROKSA, Roland
发明人： FORTHMANN, Peter , PROKSA, Roland
IPC分类号： G06T11/00 , G06T5/00
CPC分类号： G06T11/006 , G06T5/50 , G06T2207/10081 , G06T2207/20224
摘要： To reduce artifacts comprised in a CT image, the present invention provides a method comprising the steps of: Reconstructing a first image by processing one first set of CT data using a reconstruction algorithm, the first image comprising an artifact; Generating a second image by processing the first image, the second image comprising a reduced artifact; and Generating a third image by processing the first image and the second image, the third image comprising a further-reduced artifact. In an exemplary embodiment of the present invention, the step of generating the third image comprises the steps of: generating an error image representing the artifacts, based on the second image, and generating the third image by subtracting the error image from the first image. By using the provided method, the artifacts can be greatly reduced and hence a better-quality CT image can be obtained.
摘要翻译：为了减少CT图像中包含的伪影，本发明提供了一种方法，包括以下步骤：使用重构算法通过处理一组第一组CT数据来重建第一图像，第一图像包括伪影; 通过处理第一图像生成第二图像，第二图像包括减少的伪像; 以及通过处理所述第一图像和所述第二图像来生成第三图像，所述第三图像包括进一步减少的伪影。在本发明的示例性实施例中，生成第三图像的步骤包括以下步骤：基于第二图像生成表示伪像的误差图像，并且通过从第一图像中减去误差图像来生成第三图像。通过使用所提供的方法，可以大大减少假象，因此可以获得更好质量的CT图像。

33. 发明申请

WO2008155679A2 DIGITAL PULSE PROCESSING FOR MULTI-SPECTRAL PHOTON COUNTING READOUT CIRCUITS 审中-公开
标题翻译：用于多光子计数读数电路的数字脉冲处理
公开(公告)号：WO2008155679A2
公开(公告)日：2008-12-24
申请号：PCT/IB2008/052042
申请日：2008-05-23
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , PROKSA, Roland , SCHLOMKA, Jens-Peter , ROESSL, Ewald , LIRAN, Tuvia , MARKS, Aviv
发明人： PROKSA, Roland , SCHLOMKA, Jens-Peter , ROESSL, Ewald , LIRAN, Tuvia , MARKS, Aviv
IPC分类号： G01T1/17
CPC分类号： G01T1/171
摘要： An apparatus includes a local minimum identifier (408) that identifies a local minimum between overlapping pulses in a signal, wherein the pulses have amplitudes that are indicative of the energy of successively detected photons from a multi-energetic radiation beam by a radiation sensitive detector, and a pulse pile-up error corrector (232) that corrects, based on the local minimum, for a pulse pile-up energy-discrimination error when energy-discriminating the pulses using at least two thresholds corresponding to different energy levels. This technique may reduce spectral error when counting photons at a high count rate.
摘要翻译：一种装置包括识别信号中重叠脉冲之间的局部最小值的局部最小标识符（408），其中脉冲具有指示由辐射敏感检测器从多能辐射束连续检测到的光子的能量的幅度，以及脉冲堆积误差校正器（232），其基于局部最小值来校正针对对应于不同能级的至少两个阈值对脉冲进行能量鉴别的脉冲堆积能量鉴别误差。当以高计数率计数光子时，该技术可能降低光谱误差。

34. 发明申请

WO2010015959A2 COMBINED ASG, CATHODE, AND CARRIER FOR A PHOTON DETECTOR 审中-公开
标题翻译：用于光电探测器的组合式ASG，CATHODE和CARRIER
公开(公告)号：WO2010015959A2
公开(公告)日：2010-02-11
申请号：PCT/IB2009/053182
申请日：2009-07-22
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , PROKSA, Roland
发明人： PROKSA, Roland
IPC分类号： G01T1/24
CPC分类号： G01T1/2928
摘要： The present application relates to a combined anti-scatter grid, cathode, and carrier for a photon detector used in spectral CT imaging. The photon detector of the present application may include a cathode having at least one outwardly extending plate and at least one base plate, a substrate having at least one anode, and a converter material, such as for example, Cadmium Zinc Telluride ("CZT") or Cadmium Telluride. The at least one outwardly extending plate of the cathode may extend above the other detector components to act as an anti-scatter grid for the detector. Further, the at least one outwardly extending plate of the cathode may extend below the other detector components and be fixed to the at least one base plate of the detector. The converter material may be attached to at least one side of the at least one outwardly extending plate of the cathode.
摘要翻译：本申请涉及用于光谱CT成像中的用于光子检测器的组合防散射网格，阴极和载体。本申请的光子检测器可以包括具有至少一个向外延伸的板和至少一个基板，具有至少一个阳极的基板和转换器材料的阴极，例如碲化锌镉镉（“CZT” ）或碲化镉。阴极的至少一个向外延伸的板可以在其它检测器部件上方延伸，以用作检测器的防散射栅格。此外，阴极的至少一个向外延伸的板可以延伸到其他检测器部件的下方并且被固定到检测器的至少一个基板。转换器材料可以附接到阴极的至少一个向外延伸的板的至少一侧。

35. 发明申请

WO2010004460A1 K-EDGE IMAGING 审中-公开
标题翻译： K边形成像
公开(公告)号：WO2010004460A1
公开(公告)日：2010-01-14
申请号：PCT/IB2009/052670
申请日：2009-06-22
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , ROESSL, Ewald , PROKSA, Roland , SCHLOMKA, Jens-Peter
发明人： ROESSL, Ewald , PROKSA, Roland , SCHLOMKA, Jens-Peter
IPC分类号： A61B6/00
CPC分类号： G01N23/087 , A61B5/4869 , A61B6/032 , A61B6/4241 , A61B6/481 , A61B6/482
摘要： An imaging system including a radiation source (110) that emits poly-chromatic radiation that traverses an examination region and a detector (116) that detects radiation traversing the examination region and produces a signal indicative of the energy of a detected photon. The system further includes an energy discriminator (122) that energy resolves the signal based on a plurality of different energy thresholds, wherein at least two of the energy thresholds have values corresponding to at least two different K-edge energies of two different elements in a mixture disposed in the examination region. The system also includes a signal decomposer (132) that decomposes the energy-resolved signal into at least a multi K-edge component representing the at least two different K-edge energies. In one instance, a stoichiometric ratio of the two different elements in the contrast agent is known and substantially constant.
摘要翻译：一种成像系统，包括发射穿过检查区域的多色辐射的辐射源（110）和检测穿过检查区域的辐射的检测器（116），并产生指示检测到的光子的能量的信号。该系统还包括能量鉴别器（122），其能量基于多个不同的能量阈值来解决信号，其中至少两个能量阈值具有对应于两个不同元素的至少两个不同K边能量的值混合物置于检查区域。该系统还包括信号分解器（132），其将能量分辨信号分解成代表至少两个不同的K边缘能量的至少多个K边缘分量。在一种情况下，造影剂中两种不同元素的化学计量比是已知的并且基本上是恒定的。

36. 发明申请

WO2009122317A2 SPECTRAL DETECTOR CALIBRATION 审中-公开
标题翻译：光谱检测器校准
公开(公告)号：WO2009122317A2
公开(公告)日：2009-10-08
申请号：PCT/IB2009/051189
申请日：2009-03-20
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , LIVNE, Amir , WAINER, Naor , SCHLOMKA, Jens-Peter , ROESSL, Ewald , PROKSA, Roland
发明人： LIVNE, Amir , WAINER, Naor , SCHLOMKA, Jens-Peter , ROESSL, Ewald , PROKSA, Roland
IPC分类号： G01N23/02 , A61B6/03
CPC分类号： G01T7/005 , A61B6/032 , A61B6/4035 , A61B6/4042 , A61B6/4441 , A61B6/482 , A61B6/585 , G01N2223/3037 , G01T1/1647
摘要： A method includes detecting radiation that traverses a material having a known spectral characteristic with a radiation sensitive detector pixel that outputs a signal indicative of the detected radiation and determining a mapping between the output signal and the spectral characteristic. The method further includes determining an energy of a photon detected by the radiation sensitive detector pixel based on a corresponding output of the radiation sensitive detector pixel and the mapping.
摘要翻译：一种方法包括利用辐射敏感检测器像素检测穿过具有已知光谱特性的材料的辐射，所述辐射敏感检测器像素输出指示检测到的辐射的信号并确定输出信号和光谱特性之间的映射。该方法还包括基于辐射敏感检测器像素的对应输出和映射来确定由辐射敏感检测器像素检测到的光子的能量。

37. 发明申请

WO2008078231A1 IMAGING SYSTEM FOR IMAGING SUBSTANCES PRESENT IN AN OBJECT OF INTEREST 审中-公开
标题翻译：用于成像物体在成像对象中的成像系统
公开(公告)号：WO2008078231A1
公开(公告)日：2008-07-03
申请号：PCT/IB2007/055105
申请日：2007-12-14
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , PROKSA, Roland
发明人： PROKSA, Roland
IPC分类号： A61B6/00 , A61B6/03
CPC分类号： A61B6/504 , A61B6/027 , A61B6/032 , A61B6/4241 , A61B6/481 , A61B6/482
摘要： The present invention relates to an imaging system for imaging a substance present in an object of interest. In the object of interest are at least a first substance and second substance at the same time present. The imaging system comprises a detection unit (6) for detecting detection signals depending at least on the first substance and on the second substance, and a 5 calculation unit (12) for determining at least a first substance contribution and a second substance contribution to the detection signals. The imaging system comprises further a reconstruction unit (13) for reconstructing an image at least of one of the first substance and of the second substance using the determined first substance contribution and the determined second substance contribution.
摘要翻译：本发明涉及一种用于对存在于感兴趣物体中的物质进行成像的成像系统。感兴趣的目的是同时存在至少第一物质和第二物质。成像系统包括用于检测至少基于第一物质和第二物质的检测信号的检测单元（6），以及用于确定至少第一物质贡献和第二物质贡献的计算单元（12）检测信号。所述成像系统还包括用于使用所确定的第一物质贡献和所确定的第二物质贡献重建第一物质和第二物质中的至少一个的图像的重建单元（13）。

38. 发明申请

WO2008075244A2 IMAGING SYSTEM FOR IMAGING AN OBJECT IN AN EXAMINATION ZONE 审中-公开
标题翻译：用于在检查区中成像对象的成像系统
公开(公告)号：WO2008075244A2
公开(公告)日：2008-06-26
申请号：PCT/IB2007/054980
申请日：2007-12-10
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , PROKSA, Roland
发明人： PROKSA, Roland
IPC分类号： G06T11/00
CPC分类号： A61B6/032 , A61B6/027 , A61B6/5264
摘要： The invention relates to an imaging system for imaging an object (14) in an examination zone (5). The imaging system co mprises a radiation source emanating radiation for illuminating the examination zone (5), a detection unit for generating detection values depending on the radiation after having passed the examination zone (5) and a moving unit for moving the 5 radiation source and the examination zone relative to each other along a first trajectory (15) und along a second trajectory (16). The position of at least one of the first trajectory (15) and of the second trajectory (16) with respect to the object is determined by a determination unit. The imaging system further comprises a reconstruction unit for reconstructing an image of the object (14) from the detection values using the determined position of the at least one of 10 the first trajectory (15) and the second trajectory (16).
摘要翻译：本发明涉及一种用于对检查区（5）中的物体（14）进行成像的成像系统。成像系统包括用于照射检查区域（5）的辐射源辐射源，用于在通过检查区域（5）之后产生取决于辐射的检测值的检测单元和用于移动5个辐射源的移动单元和所述检查区沿第一轨迹（15）相对于彼此沿着第二轨迹（16）而相对于彼此。第一轨迹（15）和第二轨迹（16）中的至少一个相对于物体的位置由确定单元确定。成像系统还包括重建单元，用于使用所确定的第一轨迹（15）和第二轨迹（16）中的至少一个轨迹的位置，根据检测值重建对象（14）的图像。

39. 发明申请

WO2011013031A1 X-RAY EXAMINATION DEVICE AND METHOD 审中-公开
标题翻译： X射线检查装置和方法
公开(公告)号：WO2011013031A1
公开(公告)日：2011-02-03
申请号：PCT/IB2010/053304
申请日：2010-07-20
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , PROKSA, Roland
发明人： PROKSA, Roland
IPC分类号： A61B6/03 , G01T1/06
CPC分类号： A61B6/405 , A61B6/032 , A61B6/4021 , A61B6/4233 , A61B6/4241 , A61B6/482 , A61B6/508 , A61B6/542 , A61B6/585 , G01T1/171
摘要： The present invention relates to an X-ray examination device and a corresponding method. A fast and periodical modulation of the X-ray flux within each detection interval is performed having a low X-ray flux at the beginning of the detection interval to ensure that no detection channel is overloaded. With increasing the X-ray flux particularly the peripheral detection channels will run into saturation, which is detected. A saturated detector channel is stopped from further detecting radiation, and the time of effective radiation detection without saturation is measured for correcting those detection signals. From all detection signals, after any correction of detection signals from saturated detection channels, an X-ray image can be reconstructed.
摘要翻译：本发明涉及一种X射线检查装置及相应的方法。在检测间隔开始时，对每个检测间隔内的X射线通量进行快速且周期性的调制，以确保没有检测通道过载。随着X射线通量的增加，外围检测通道会进入饱和状态。停止饱和检测器通道进一步检测辐射，并且测量没有饱和的有效辐射检测的时间来校正这些检测信号。从所有的检测信号中，经过来自饱和检测通道的检测信号的任何校正之后，可以重建X射线图像。

40. 发明申请

WO2010070583A1 X-RAY EXAMINATION DEVICE AND METHOD 审中-公开
标题翻译： X射线检查装置及方法
公开(公告)号：WO2010070583A1
公开(公告)日：2010-06-24
申请号：PCT/IB2009/055761
申请日：2009-12-15
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , SCHLOMKA, Jens-peter , ROESSL, Ewald , PROKSA, Roland
发明人： SCHLOMKA, Jens-peter , ROESSL, Ewald , PROKSA, Roland
IPC分类号： A61B6/03 , H05G1/34
CPC分类号： A61B6/405 , A61B6/032 , A61B6/4241 , A61B6/482 , A61B6/508 , A61B6/542 , G01T1/2985 , G06T11/006 , H05G1/34
摘要： The present invention relates to an X-ray examination device by which the problems of high count rate in the construction of a spectral CT scanner based on photon counting can be overcome. The proposed X-ray examination device comprises: an X-ray source (2) for emitting an X-ray beam (4) of X-ray radiation while rotating around an imaging region (5), an X-ray detector (6) having a plurality of detector cells (61) for detecting X- ray radiation emitted by said X-ray source (2) and having passed through said imaging region (5), a control unit (9) for modulating the source current of said X-ray source (2) between at least two different source currents to obtain at least two detection data sets for at least two different X-ray fluxes, wherein the lowest X-ray flux is low enough to avoid overloading of the X-ray detector (6) in the direct X-ray beam, and a reconstruction unit (10) for reconstructing an X-ray image from said at least two detection data sets, wherein the pixel values of the pixels of said X-ray image are reconstructed taking into account whether or not the higher X-ray flux resulted in an overloading of the X-ray detector (6) at the respective detector cells.
摘要翻译：本发明涉及一种能够克服基于光子计数的光谱CT扫描器的高计数率问题的X射线检查装置。所提出的X射线检查装置包括：X射线源（2），用于在围绕成像区域（5）旋转的同时发射X射线辐射的X射线束（4），X射线检测器（6）具有用于检测由所述X射线源（2）发射并穿过所述成像区域（5）的X射线辐射的多个检测器单元（61），用于调制所述X射线源的源电流的控制单元（9）至少两个不同源电流之间的射线源（2），以获得用于至少两个不同X射线通量的至少两个检测数据组，其中最低X射线通量足够低以避免X射线检测器的过载（6），以及用于从所述至少两个检测数据集重构X射线图像的重建单元（10），其中，所述X射线图像的像素的像素值被重建考虑较高的X射线通量是否导致X射线检测器（6）在相应检测器单元处的过载。

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