公开(公告)号：DE602007003203D1

公开(公告)日：2009-12-24

申请号：DE602007003203

申请日：2007-03-14

Applicant: PHILIPS INTELLECTUAL PROPERTY

Inventor： ROESSL EWALD ,  ZIEGLER ANDY

IPC: G06T5/50

Abstract: It is described a method for reducing noise of X-ray attenuation data related to a first and second spectral X-ray data acquisition. The method comprises the steps of (a) acquiring data representing the X-ray attenuation behavior of a region of interest, (b) determining a first and a second attenuation-base line integral for the first and the second X-ray acquisition, respectively, and (c) calculating expected first and second signal to noise ratios for the first and the second attenuation-base line integral based on given signal to noise ratios for the first and second spectral X-ray data acquisition, respectively. The method further comprises the steps of (d) repeating the above mentioned steps of determining the attenuation-base line integrals and calculating the expected signal to noise ratios for a further first spectral X-ray data acquisition and (e) selecting improved spectral X-ray data acquisitions in order to enhance the overall signal to noise ratio of a final X-ray image.

公开(公告)号：WO2012104770A2

公开(公告)日：2012-08-09

申请号：PCT/IB2012050418

申请日：2012-01-30

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  PHILIPS INTELLECTUAL PROPERTY ,  ROESSL EWALD ,  KOEHLER THOMAS

Inventor： ROESSL EWALD ,  KOEHLER THOMAS

IPC: G21K1/06

CPC classification number: G21K1/065 ,  G01N23/04 ,  G21K1/06 ,  G21K2207/005

Abstract: The present invention relates to X-ray differential phase-contrast imaging, in particular to a deflection device for X-ray differential phase-contrast imaging. In order to provide differential phase-contrast imaging with improved dose efficiency, a deflection device (28) for X-ray differential phase-contrast imaging is provided, comprising a deflection structure (41) with a first plurality (44) of first areas (46), and a second plurality (48) of second areas (50). The first areas are provided to change the phase and/or amplitude of an X- ray radiation; and wherein the second areas are X-ray transparent. The first and second areas are arranged periodically such that, in the cross section, the deflection structure is provided with a profile arranged such that the second areas are provided in form of groove-like recesses (54) formed between first areas provided as projections (56). The adjacent projections form respective side surfaces (58)partly enclosing the respective recess arranged in between. The side surfaces of each recess have a varying distance (60) across the depth (62) of the recess.

Abstract translation: X射线差分相位对比成像技术领域本发明涉及X射线差分相位对比成像，尤其涉及一种用于X射线差分相位对比成像的偏转装置。 为了提供具有改善的剂量效率的差分相衬成像，提供了用于X射线差分相衬成像的偏转装置（28），其包括具有第一多个（44）第一区域（44）的偏转结构（41） 46）和第二多个（48）第二区域（50）。 提供第一区域以改变X射线辐射的相位和/或振幅; 并且其中第二区域是X射线透明的。 第一区域和第二区域周期性地布置，使得在该横截面中，偏转结构设置有轮廓，该轮廓布置成使得第二区域以形成在作为凸起设置的第一区域之间的凹槽状凹部（54） 56）。 相邻的凸出部分形成相应的侧表面（58），部分地包围设置在其间的相应凹槽。 每个凹槽的侧表面在凹槽的深度（62）上具有变化的距离（60）。

公开(公告)号：WO2008155679A3

公开(公告)日：2009-07-09

申请号：PCT/IB2008052042

申请日：2008-05-23

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  PHILIPS INTELLECTUAL PROPERTY ,  PROKSA ROLAND ,  SCHLOMKA JENS-PETER ,  ROESSL EWALD ,  LIRAN TUVIA ,  MARKS AVIV

Inventor： PROKSA ROLAND ,  SCHLOMKA JENS-PETER ,  ROESSL EWALD ,  LIRAN TUVIA ,  MARKS AVIV

IPC: G01T1/17

CPC classification number: G01T1/171

Abstract: 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.

Abstract translation: 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。

公开(公告)号：WO2009133481A3

公开(公告)日：2010-06-10

申请号：PCT/IB2009051192

申请日：2009-03-20

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  PHILIPS INTELLECTUAL PROPERTY ,  MARKS AVIV ,  HERRMANN CHRISTOPH ,  ROESSL EWALD

Inventor： MARKS AVIV ,  HERRMANN CHRISTOPH ,  ROESSL EWALD

IPC: G01T1/17

CPC classification number: G01T1/17

Abstract: A pulse shaper (124) includes an integrator (202) with a feedback capacitor (208) that stores integrated charge of a charge pulse indicative of a detected photon. An output pulse of the integrator includes a peak amplitude indicative of the detected photon. An end pulse identifier (214) identifies the end of the charge pulse. A controller (216) generates a control signal that invokes a reset of the integrator (202) when the end of the 5 pulse is identified. An energy discriminator (128) includes a chain of comparators (132) connected in series. An output of each of the comparators (702, 704) is influenced by an output of a previous one of the comparators (702, 704). A decision component (706) determines an output of the comparators (702, 704), and a controller component (708) triggers the decision component (706) to store the output of the comparators (702, 704) 10 after lapse of a charge collection time.

Abstract translation: 脉冲整形器（124）包括具有反馈电容器（208）的积分器（202），该反馈电容器存储指示检测到的光子的电荷脉冲的积分电荷。 积分器的输出脉冲包括指示检测到的光子的峰值振幅。 结束脉冲识别器（214）识别充电脉冲的结束。 当识别出5脉冲的结束时，控制器（216）产生调用积分器（202）的复位的控制信号。 能量鉴别器（128）包括串联连接的比较器链（132）。 每个比较器（702,704）的输出受到前一个比较器（702,704）的输出的影响。 判定部件（706）确定比较器（702,704）的输出，并且控制器部件（708）触发判定部件（706），以在经过充电之后存储比较器（702,704）10的输出 收集时间。

公开(公告)号：WO2007110796A2

公开(公告)日：2007-10-04

申请号：PCT/IB2007050884

申请日：2007-03-15

Applicant: PHILIPS INTELLECTUAL PROPERTY ,  KONINKL PHILIPS ELECTRONICS NV ,  ZIEGLER ANDY ,  ROESSL EWALD

Inventor： ZIEGLER ANDY ,  ROESSL EWALD

CPC classification number: G01T1/2985

Abstract: It is described a method for dynamically optimizing the signal-to-noise ratio of attenuation data related to two different X-ray energies for reconstructing an image of an object under examination. The method comprises (a) estimating the thickness and the material composition of the object at a plurality of different projection angles, (b) for each of the various projection angles calculating for a variety of combinations of different first and second X-ray energies a corresponding common signal-to-noise ratio, (c) for each of the various projection angles choosing the first and the second X-ray energy causing the maximum corresponding common signal-to-noise ratio, and (d) for each of the various projection angles acquiring X-ray attenuation data of the object whereby the two X-ray energies are the X-ray energies causing a maximum signal-to-noise ratio assigned to the respective projection angle.

Abstract translation: 描述了一种用于动态优化与两个不同X射线能量相关的衰减数据的信噪比的方法，用于重建被检查物体的图像。 该方法包括：（a）以多个不同的投影角度估计物体的厚度和材料成分，（b）对于针对不同的第一和第二X射线能量的各种组合计算的各种投影角度中的每一个 相应的公共信噪比，（c）对于选择第一和第二X射线能量的各种投影角度中的每一个引起最大对应的公共信噪比，（d）对于各种 投影角度获取物体的X射线衰减数据，由此两个X射线能量是分配给各个投影角度的最大信噪比的X射线能量。

公开(公告)号：WO2013080104A2

公开(公告)日：2013-06-06

申请号：PCT/IB2012056663

申请日：2012-11-23

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  PHILIPS INTELLECTUAL PROPERTY

Inventor： ROESSL EWALD ,  THRAN AXEL ,  PROKSA ROLAND

CPC classification number: G01T1/20 ,  G01T1/2008

Abstract: Detection apparatus for detecting radiation The invention relates to a detection apparatus for detecting radiation. The detection apparatus comprises at least two scintillators (14, 15) having different temporal behaviors, each generating scintillation light upon reception of radiation, wherein the generated scintillation light is commonly detected by a scintillation light detection unit (16), thereby generating a common light detection signal. A detection values determining unit determines first detection values by applying a first determination process and second detection values by applying a second determination process, which is different to the first determination process, on the detection signal. The first determination process includes frequency filtering the detection signal. Since the scintillation light of the different scintilla- tors is collectively detected by the same scintillation light detection unit, detection arrangements with, for example, side-looking photodiodes for separately detecting the different scintillation light of the different scintillators are not necessarily required, thereby reducing the technical complexity of the detection apparatus.

Abstract translation: 用于检测辐射的检测装置技术领域本发明涉及一种用于检测辐射的检测装置。 检测装置包括具有不同时间行为的至少两个闪烁体（14,15），每个闪烁体在接收到辐射时产生闪烁光，其中所产生的闪烁光通常由闪烁光检测单元（16）检测，从而产生公共光 检测信号。 检测值确定单元通过对检测信号应用与第一确定处理不同的第二确定处理来应用第一确定处理和第二检测值来确定第一检测值。 第一确定处理包括对检测信号进行频率滤波。 由于不同的闪烁体的闪烁光被同一个闪烁光检测单元共同检测，所以不一定需要与用于分别检测不同的闪烁体的不同的闪烁光的例如侧视光电二极管的检测装置，从而减少 检测装置的技术复杂性。

公开(公告)号：WO2010061307A2

公开(公告)日：2010-06-03

申请号：PCT/IB2009054884

申请日：2009-11-03

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  PHILIPS INTELLECTUAL PROPERTY ,  ROESSL EWALD

Inventor： ROESSL EWALD

CPC classification number: G01T1/1647

Abstract: A spectral processor (118) includes a first processing channel (120) that generates a first spectral signal derived from a detector signal, wherein the first spectral signal includes first spectral information about the detector signal, and a second processing channel (120) that generates a second spectral signal derived from the detector signal, wherein the second spectral signal includes second spectral information about the detector signal, wherein the first and second spectral signals are used to spectrally resolve the detector signal, and wherein the detector signal is indicative of detected polychromatic radiation.

Abstract translation: 光谱处理器（118）包括产生从检测器信号导出的第一光谱信号的第一处理信道（120），其中第一光谱信号包括关于检测器信号的第一光谱信息，以及产生第二光谱信号 从所述检测器信号导出的第二光谱信号，其中所述第二光谱信号包括关于所述检测器信号的第二光谱信息，其中所述第一和第二光谱信号用于对所述检测器信号进行光谱解析，并且其中所述检测器信号指示检测到的多色 辐射。

公开(公告)号：WO2013132361A2

公开(公告)日：2013-09-12

申请号：PCT/IB2013050975

申请日：2013-02-06

Applicant: KONINKL PHILIPS NV ,  PHILIPS INTELLECTUAL PROPERTY

Inventor： ROESSL EWALD

IPC: A61B6/03

CPC classification number: G21K1/02 ,  A61B6/032 ,  A61B6/06 ,  A61B6/4021 ,  A61B6/4035 ,  G01N23/04

Abstract: An imaging system (500) includes a focal spot (508) that rotates along a path around an examination region and emits a radiation beam that traverses a field of view of the examination region and a subject or object therein. The system further includes a detector array (520) that is located opposite the radiation source, across the examination region. The detector array detects radiation traversing the field of view and outputs a signal indicative of the detected radiation. The system further includes a beam shaper that is located between the radiation source and the examination region. The beam shaper rotates with the focal spot and, relative to the focal spot, in an opposite direction of the focal spot with a same angular frequency as the rotating of the focal spot and attenuates the radiation beam which reduces a flux density across the detector array at each rotational angle of the focal spot.

Abstract translation: 成像系统（500）包括焦点（508），其沿着检查区域周围的路径旋转并且发射穿过检查区域的视野的辐射束以及其中的被摄体或物体。 该系统还包括跨越检查区域与辐射源相对定位的检测器阵列（520）。 检测器阵列检测穿过视野的辐射，并输出指示检测到的辐射的信号。 该系统还包括位于辐射源和检查区域之间的光束整形器。 光束整形器与焦点一起旋转并且相对于焦斑以与焦点的旋转相同的角频率与焦点的相反方向旋转，并且衰减辐射束，从而降低了检测器阵列上的通量密度 在焦斑的每个旋转角度。

公开(公告)号：WO2013030708A3

公开(公告)日：2013-06-27

申请号：PCT/IB2012054170

申请日：2012-08-16

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

Inventor： ROESSL EWALD ,  PROKSA ROLAND

IPC: G01T1/24

CPC classification number: G01T1/24 ,  G01T1/241 ,  G01T1/247

Abstract: Adetector array includes at least one direct conversion detector pixel (114 - 114 M ) configured to detect photons of poly-chromatic ionizing radiation. The pixel includes a cathode layer (116), an anode layer (118) including an anode electrode (118 -118 M ) for each of the at least one detector pixels, a direct conversion material (120), disposed between the cathode layer and the anode layer, anda gate electrode disposed in the direct conversion material, parallelto and between the cathode and anode layers.

Abstract translation: 探测器阵列包括至少一个被配置为探测多色电离辐射的光子的直接转换探测器像素（114-114 M）。 所述像素包括阴极层（116），包括用于所述至少一个检测器像素中的每一个的阳极电极（118-118M）的阳极层（118），直接转换材料（120），设置在所述阴极层 阳极层以及设置在直接转换材料中的栅极电极，平行于阴极层和阳极层之间。

公开(公告)号：WO2012095713A9

公开(公告)日：2013-05-23

申请号：PCT/IB2011056004

申请日：2011-12-29

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  PHILIPS INTELLECTUAL PROPERTY ,  ROESSL EWALD ,  KOEHLER THOMAS ,  THRAN AXEL

Inventor： ROESSL EWALD ,  KOEHLER THOMAS ,  THRAN AXEL

IPC: G06T11/00

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

Abstract: The invention relates to an imaging system (30) for imaging an object. A projection data providing unit (31) provides acquired spectral projection data of an object comprising at least two components, and a reconstruction unit (10) iteratively reconstructs at least two final component images of the object by performing several iteration steps, in which at least two intermediate component images are updated based on the acquired spectral projection data and a penalty term, which is indicative of the correlated noise between the at least two intermediate component images. Since the at least two intermediate component images are updated based on the acquired spectral projection data and a penalty term, which is indicative of the correlated noise, correlated noise is penalized during the iterative reconstruction. The finally resulting component images of the object are therefore less corrupted by correlated noise and have an improved image quality.

Abstract translation: 本发明涉及一种用于对物体成像的成像系统（30）。 投影数据提供单元（31）提供包括至少两个分量的对象的获取的光谱投影数据，并且重建单元（10）通过执行几个迭代步骤来迭代地重构对象的至少两个最终分量图像，其中至少 基于所获取的光谱投影数据和惩罚项来更新两个中间分量图像，所述惩罚项指示所述至少两个中间分量图像之间的相关噪声。 由于基于所获取的频谱投影数据和指示相关噪声的罚分项来更新至少两个中间分量图像，所以在迭代重建期间相关噪声被惩罚。 因此，最终产生的对象的分量图像被相关噪声较少损坏并且具有改善的图像质量。