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1. 发明申请

WO2010001281A1 SPECTRAL CT 审中-公开
标题翻译：光谱CT
公开(公告)号：WO2010001281A1
公开(公告)日：2010-01-07
申请号：PCT/IB2009/052300
申请日：2009-06-01
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , FORTHMANN, Peter , VAN STEVENDAAL, Udo , ROESSL, Ewald , GRASS, Michael , PROKSA, Roland , SCHLOMKA, Jens-Peter
发明人： FORTHMANN, Peter , VAN STEVENDAAL, Udo , ROESSL, Ewald , GRASS, Michael , PROKSA, Roland , SCHLOMKA, Jens-Peter
IPC分类号： A61B6/03 , G01T1/20 , H05G1/60
CPC分类号： A61B6/405 , A61B6/032 , A61B6/4014 , A61B6/4035 , A61B6/4042 , A61B6/4241 , A61B6/482
摘要： An imaging system includes a radiation source (106, T1, T2, T3) that rotates about an examination region and emits radiation that traverses the examination region. The radiation source (106, T1, T2, T3) emits radiation having an energy spectrum that is selectively alternately switched between at least two different energy spectra during an imaging procedure. The system further includes an energy-resolving detector array (116, D1, D2, D3) that detects radiation traversing the examination region. The energy-resolving detector array (116, D1, D2, D3) resolves the detected radiation over at least two different energy ranges and produces energy-resolved output signals as a function of both emission energy spectrum and energy range. The system further includes a reconstructor (126) that performs a spectral reconstruction of the energy-resolved output signals. In another embodiment, the detector array (116) includes a photon-counting detector array (116).
摘要翻译：成像系统包括围绕检查区域旋转并且发射穿过检查区域的辐射的辐射源（106，T1，T2，T3）。辐射源（106，T1，T2，T3）发射具有在成像过程期间在至少两个不同能量谱之间选择性交替切换的能谱的辐射。该系统还包括检测穿过检查区域的辐射的能量分辨检测器阵列（116，D1，D2，D3）。能量分辨检测器阵列（116，D1，D2，D3）通过至少两个不同的能量范围来解析检测到的辐射，并且产生作为发射能量谱和能量范围的函数的能量分辨的输出信号。该系统还包括执行能量分辨输出信号的频谱重建的重建器（126）。在另一个实施例中，检测器阵列（116）包括光子计数检测器阵列（116）。

2. 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。

3. 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。

4. 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。

5. 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。

6. 发明申请

WO2009072044A2 IMAGING APPARATUS, CALIBRATION ASSEMBLY, DEVICE AND METHOD FOR OBTAINING A MONOCHROMATIC FLOW OF X-RAY RADIATION, AND METHODS OF CALIBRATING A DETECTOR ELEMENT 审中-公开
标题翻译：成像装置，校准装置，用于获得X射线辐射的单色流动的装置和方法，以及校准检测元件的方法
公开(公告)号：WO2009072044A2
公开(公告)日：2009-06-11
申请号：PCT/IB2008/054997
申请日：2008-11-28
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , SCHLOMKA, Jens-peter , ROESSL, Ewald
发明人： SCHLOMKA, Jens-peter , ROESSL, Ewald
CPC分类号： G21K1/06 , G21K2201/062 , G21K2201/067
摘要： An imaging apparatus (14) based on the detection of X-ray photons, in particular for medical use, is described. The imaging apparatus (14) comprises a radiation source (16) for generating a flow (18) of X-ray radiation, a detector (20) for detecting X-ray radiation, a control unit (22) adapted to control the radiation source (16), to read out information from the detector (20) and to process the information into a visual image (24), and a device (10) for obtaining a monochromatic flow (12) of X-ray radiation. Furthermore, a device (10) is described, which comprises a positioning apparatus (34) and a crystalline element (36) mounted on the positioning apparatus (34), wherein the positioning apparatus (34) is adapted to position the crystalline element (36) relative to a flow (18) of X-ray radiation generated by a radiation source (16) such that the crystalline element (36) reflects a monochromatic flow (12) of X-ray radiation according to Bragg's law. Finally, a corresponding calibration assembly (26), a method of obtaining a monochromatic flow (12) of X-ray radiation and methods of calibrating a detector element (42) of a detector (20) are described.
摘要翻译：描述了基于X射线光子的检测，特别是用于医疗用途的成像装置（14）。成像装置（14）包括用于产生X射线辐射流（18）的辐射源（16），用于检测X射线辐射的检测器（20），适于控制辐射源（16），从所述检测器（20）读出信息并将所述信息处理成可视图像（24）;以及用于获得X射线辐射的单色流（12）的装置（10）。此外，描述了一种装置（10），其包括定位装置（34）和安装在定位装置（34）上的结晶元件（36），其中定位装置（34）适于将结晶元件（36））相对于由辐射源（16）产生的X射线辐射的流（18），使得结晶元件（36）根据布拉格定律反射X射线辐射的单色流（12）。最后，描述相应的校准组件（26），获得X射线辐射的单色流（12）的方法和校准检测器（20）的检测器元件（42）的方法。

7. 发明申请

WO2012123845A1 LIKELIHOOD-BASED SPECTRAL DATA PROJECTION DOMAIN DE-NOISING 审中-公开
标题翻译：基于LIKELIHOOD的光谱数据投影域名消除
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
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： G06T11/00
CPC分类号： G01T7/005 , G06T11/005 , G06T2211/408
摘要： 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.
摘要翻译：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。

8. 发明申请

WO2011073863A1 COMPUTED TOMOGRAPHY APPARATUS 审中-公开
标题翻译：计算机图像设备
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
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , KOEHLER, Thomas , PROKSA, Roland , ROESSL, Ewald
发明人： KOEHLER, Thomas , PROKSA, Roland , ROESSL, Ewald
IPC分类号： A61B6/03 , G01N23/04 , G06T11/00
CPC分类号： A61B6/032 , A61B6/469 , A61B6/542 , G01N23/046 , G01N2223/419 , G06T11/005 , Y10S378/901
摘要： 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.
摘要翻译：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。

9. 发明申请

WO2008107837A1 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：WO2008107837A1
公开(公告)日：2008-09-12
申请号：PCT/IB2008/050767
申请日：2008-03-03
申请人： PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , KONINKLIJKE PHILIPS ELECTRONICS N.V. , ZIEGLER, Andy , ROESSL, Ewald , PROKSA, Roland
发明人： ZIEGLER, Andy , ROESSL, Ewald , PROKSA, Roland
IPC分类号： G06T11/00 , 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：本发明涉及一种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能量相关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。

10. 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。

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