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：WO2008107837A1

公开(公告)日：2008-09-12

申请号：PCT/IB2008/050767

申请日：2008-03-03

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

Inventor： ZIEGLER, Andy ,  ROESSL, Ewald ,  PROKSA, Roland

IPC: G06T11/00 ,  G06T5/00

CPC classification number: G06T11/005 ,  G06T5/002 ,  G06T5/20 ,  G06T2207/10081 ,  G06T2207/30004

Abstract: 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.

Abstract translation: 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。

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：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：WO2011070488A1

公开(公告)日：2011-06-16

申请号：PCT/IB2010/055561

申请日：2010-12-03

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V. ,  PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH ,  GELLER, Diester ,  ENGEL, Klaus, J. ,  VOGTMEIER, Gereon ,  KOEHLER, Thomas ,  ROESSL, Ewald

Inventor： GELLER, Diester ,  ENGEL, Klaus, J. ,  VOGTMEIER, Gereon ,  KOEHLER, Thomas ,  ROESSL, Ewald

IPC: A61B6/00 ,  G01N23/04

CPC classification number: A61B6/00 ,  A61B6/4291 ,  A61B6/4441 ,  A61B6/484

Abstract: X-raydevices for Phase Contrast Imaging (PCI) are often built up with the help ofgratings. For large field-of-views (FOV), production cost and complexity of these gratings could increase significantly as they need to have a focused geometry. Instead of a pure PCI with a large FOV, this invention suggests to combine a traditional absorption X-rayimaging system with large-FOV with an insertable low-cost PCI systemwith small-FOV, The invention supports the user to direct the PCI systemwith reduced FOV to a region that he regards as most interesting for performing a PCI scan thus eliminating X-raydose exposure for scanning regions not interesting fora radiologist. The PCI scan may be generated on the basis of local tomography.

Abstract translation: 用于相位对比成像（PCI）的X射线装置通常在格栅的帮助下建立。 对于大视野（FOV）来说，这些光栅的生产成本和复杂性可能会因为需要聚焦几何而显着增加。 本发明不是采用具有大FOV的纯PCI，而是将传统的吸收式X射线成像系统与大型FOV结合，并具有小FOV的可插入式低成本PCI系统。本发明支持用户将具有降低的FOV的PCI系统 他认为最有意思的是进行PCI扫描，从而消除了对放射科医生不感兴趣的扫描区域的X射线摄影。 可以基于局部断层摄影产生PCI扫描。

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：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：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：WO2012038857A1

公开(公告)日：2012-03-29

申请号：PCT/IB2011/053995

申请日：2011-09-13

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

Inventor： KOEHLER, Thomas ,  ROESSL, Ewald

IPC: G01N23/04 ,  A61B6/00

CPC classification number: A61B6/484

Abstract: The present invention relates to recovering image data in differential phase- contrast imaging. In order to provide improved phase gradient unwrapping in case of insufficient image data, a method for phase gradient unwrapping in differential phase contrast imaging based on a quality check is provided with the following the steps: a) providing X-ray phase contrast image data; b) estimating (132) wrapped phase gradients (134) for at least sample image points (116) of the image data; c) determining (136) likelihood (138) that phase wrapping occurred at the sample image points and selecting (140) image points of the sample image points with medium likelihood (142, 150); d) adapting the data of the selected image points by applying predetermined filtering (144); e) replacing (146) the acquired data of the selected image points with the adapted data providing adapted image data (148), which adapted image data also comprises the acquired data of the non- selected image points; and f) recovering the image data on the basis of the adapted image data by phase-un-wrapping (152).

Abstract translation: 本发明涉及在差分相位对比成像中恢复图像数据。 为了在图像数据不足的情况下提供改进的相位梯度展开，基于质量检查的差分相位成像中的相位梯度展开方法被提供有以下步骤：a）提供X射线相位对比图像数据; b）为图像数据的至少样本图像点（116）估计（132）包裹相位梯度（134）; c）确定（136）在样本图像点发生相位缠绕的可能性（138），并且选择具有中等可能性的样本图像点的（140）图像点（142,150）; d）通过应用预定的滤波来适应所选图像点的数据（144）; e）用提供适应图像数据的适配数据（148）替换（146）所选择的图像点的所获取的数据，所述适合的图像数据还包括所获取的非选择图像点的数据; 以及f）通过相位拆包来恢复基于适配图像数据的图像数据（152）。

公开(公告)号：WO2009141760A3

公开(公告)日：2010-07-29

申请号：PCT/IB2009051954

申请日：2009-05-12

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

Inventor： ROESSL EWALD R ,  PROKSA ROLAND

IPC: G01T1/24

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）。