公开(公告)号：WO2019034650A1

公开(公告)日：2019-02-21

申请号：PCT/EP2018/072018

申请日：2018-08-14

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： DAERR, Heiner ,  PROKSA, Roland

IPC: G21K1/02 ,  G01T1/164

Abstract: An anti-scatter grid (ASG) for X-ray imaging with a surface (S) formed from a plurality of strips (LAM). The plurality of strips including at least two guard strips ( L i ,L i+1 ) that are thicker in a direction parallel to said surface than one or more strips (/ i ) of said plurality of strips (LAM). The one or more strips (/ i ) being situated in between said two guard strips ( L i ,L i+1 ).

公开(公告)号：WO2018011340A1

公开(公告)日：2018-01-18

申请号：PCT/EP2017/067694

申请日：2017-07-13

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： PROKSA, Roland ,  DAERR, Heiner ,  FRANZ, Daniela

IPC: A61B6/03 ,  A61B6/00

Abstract: A method of an image processing apparatus for identifying a type of adipose body tissue within a subject, based on performing a spectral computed tomography (CT) scan of a region of interest of the subject; and using a combination of different image processing techniques to differentiate between at least two adipose tissue types within the region of interest.

Abstract translation: 基于对对象的感兴趣区域执行频谱计算机断层摄影（CT）扫描来识别对象内的脂肪体组织的类型的图像处理设备的方法; 并且使用不同图像处理技术的组合来区分感兴趣区域内的至少两种脂肪组织类型。

公开(公告)号：WO2016079638A1

公开(公告)日：2016-05-26

申请号：PCT/IB2015/058691

申请日：2015-11-11

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： BRENDEL, Bernhard Johannes ,  PROKSA, Roland ,  KOEHLER, Thomas ,  ROESSL, Ewald ,  DAERR, Heiner ,  GRASS, Michael ,  THRAN, Axel

IPC: A61B6/03 ,  A61B6/00 ,  A61B6/06

CPC classification number: A61B6/06 ,  A61B6/032 ,  A61B6/035 ,  A61B6/0407 ,  A61B6/4241

Abstract: An imaging system includes a radiation source (108) configured to rotate about an examination region (106)and emit radiation that traverses the examination region. The imaging system further includes an array of radiation sensitive pixels (112) configured to detect radiation traversing the examination region and output a signal indicative of the detected radiation. The array of radiation sensitive pixels is disposed opposite the radiation source, across the examination region. The imaging system further includes a rigid flux filter device (130) disposed in the examination region between the radiation source and the radiation sensitive detector array of photon counting pixels. The rigid flux filter device is configured to filter the radiation traversing the examination region and incident thereon. The radiation leaving the rigid flux filter device has a predetermined flux.

Abstract translation: 成像系统包括被配置为围绕检查区域（106）旋转并且发射穿过检查区域的辐射的辐射源（108）。 成像系统还包括辐射敏感像素阵列（112），其被配置为检测穿过检查区域的辐射并输出指示检测到的辐射的信号。 辐射敏感像素的阵列布置成与辐射源相对，穿过检查区域。 成像系统还包括设置在辐射源和光子计数像素的辐射敏感检测器阵列之间的检查区域中的刚性通量滤波器装置（130）。 刚性通量滤波器装置被配置为过滤穿过检查区域并入射到其上的辐射。 离开刚性通量滤波器的辐射具有预定的通量。

公开(公告)号：WO2014173812A1

公开(公告)日：2014-10-30

申请号：PCT/EP2014/057907

申请日：2014-04-17

Applicant: KONINKLIJKE PHILIPS N.V. ,  PHILIPS DEUTSCHLAND GMBH

Inventor： DAERR, Heiner ,  ENGEL, Klaus Jürgen ,  HERRMANN, Christoph ,  STEADMAN BOOKER, Roger ,  ROESSL, Ewald

IPC: G01T1/17 ,  G01T1/24

CPC classification number: G01J1/44 ,  G01T1/171 ,  G01T1/24 ,  G01T1/247

Abstract: The invention relates to a method and a pulse processing circuit (100) for the processing of current pulses (CP) generated by incident photons (X) in a piece of converter material, for instance in a pixel (11) of a radiation detector. Deviations of the pulse shape from a reference are detected and used to identify pulse corruption due to pile-up effects at high count rates and/or charge sharing between neighboring pixels. The deviation detection may for instance be achieved by generating, with a pulse shaper (110), bipolar shaped pulses from the current pulse (CP) and/or two shaped pulses of different shapes which can be compared to each other.

Abstract translation: 本发明涉及一种用于处理由转换器材料中的入射光子（X）产生的电流脉冲（CP）的方法和脉冲处理电路（100），例如在辐射探测器的像素（11）中。 检测到脉冲形状与参考的偏差，并用于识别由于高计数率下的堆积效应和/或相邻像素之间的电荷共享引起的脉冲破坏。 偏移检测可以例如通过用脉冲整形器（110）产生来自当前脉冲（CP）的双极形状脉冲和/或可以彼此比较的不同形状的两个成形脉冲来实现。

公开(公告)号：WO2022096401A1

公开(公告)日：2022-05-12

申请号：PCT/EP2021/080170

申请日：2021-10-29

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： FRERKING, Lena Christina ,  KOEHLER, Thomas ,  DAERR, Heiner

IPC: G06T11/00

Abstract: The invention provides a method for obtaining a spectral computed tomography, CT, image of a region of interest from CT projection data acquired by way of a CT imaging system. The method includes obtaining a first set of CT projection data, acquired by way of an X-ray tube operated at a first voltage, wherein the first set of CT projection data is representative of an image having a first resolution and obtaining a second set of CT projection data, acquired by way of an X-ray tube operated at a second voltage, the second voltage being higher than the first voltage, wherein the second set of CT projection data is representative of an image having a second resolution, wherein the second resolution is lower than the first resolution.A low-pass filter is applied to the first set of CT projection data, thereby generating a filtered first set of CT projection data, wherein the filtered first set of CT projection data is representative of an image having a resolution closer to the second resolution than the first resolution. A spectral CT image is generated based on the filtered first set of CT projection data and the second set of CT projection data.

公开(公告)号：WO2018202675A1

公开(公告)日：2018-11-08

申请号：PCT/EP2018/061135

申请日：2018-05-02

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： DAERR, Heiner ,  PROKSA, Roland ,  BERGNER, Frank

IPC: G01T1/02 ,  G01T1/16 ,  A61B6/03 ,  G01T7/00

Abstract: The present invention relates to a photon scanning apparatus comprising a photon source (2) to emit a photon beam (4), a photon detector (6) to detect photons emitted from the photon source (2). The photon source (2) is adapted to emit the photon beam (4) in accordance with a predetermined pulse width modulation scheme at a predetermined flux rate, wherein the pulse width modulation scheme defines pulse widths of the photon beam (4) for respective positions of the photon source (2) and the photon detector around a central axis (R) and an object to be scanned. The photon detector (6) is adapted to start detecting photons with a delay relative to the photon source starting to emit photons and to finish detecting photons prior to the photon source stopping to emit photons. The photon scanning apparatus thus only has to be calibrated for the predetermined flux rate.

公开(公告)号：WO2018095983A1

公开(公告)日：2018-05-31

申请号：PCT/EP2017/080096

申请日：2017-11-22

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： THRAN, Axel ,  DAERR, Heiner ,  ROESSL, Ewald ,  VOGTMEIER, Gereon

IPC: G21K1/02

Abstract: The present invention relates to an anti-scatter grid (ASG) assembly comprising a first and a second grid, wherein the second grid is arranged on top of the first grid and comprises a lateral shift. The lamella thickness of the first grid is smaller than the lamella thickness of the second grid. The present invention further relates to a detector arrangement comprising a pixel detector and an ASG assembly arranged on top of the pixel detector.

公开(公告)号：WO2017046002A1

公开(公告)日：2017-03-23

申请号：PCT/EP2016/071243

申请日：2016-09-09

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： DAERR, Heiner ,  THRAN, Axel

IPC: G01T1/24

CPC classification number: G01T1/24 ,  A61B6/032 ,  A61B6/4241 ,  G01T1/29

Abstract: The invention relates to a photon counting x-ray radiation detection system. The system (31) comprises an x-ray radiation device (2) for providing polychromatic x-ray radiation (4) for traversing an examination zone (5) during a detection period of a scan.A photon counting detection device (6) comprising detection elements (3) detects the x-ray radiation after having traversed the examination zone and measures for each detection element photon counts in one or more energy bins during the detection period. A correction unit (12) estimates for each detection element an amount of a build up charge present in the detection element and corrects the measured photon counts for the detection element based on the estimated amount of the build up charge. This allows the corruption of the photon count rates caused by the build up charges to be compensated and to improve the determination of the photon counts.

Abstract translation: 本发明涉及一种光子计数X射线辐射检测系统。 该系统（31）包括用于在扫描的检测周期期间提供穿透检查区（5）的多色X射线辐射（4）的X射线辐射装置（2）。1.一种光子计数检测装置（6），包括 检测元件（3）在穿过检查区域之后检测X射线辐射，并且在检测期间测量一个或多个能量箱中的每个检测元件光子计数。 校正单元（12）针对每个检测元件估计存在于检测元件中的累积电荷的量，并且基于估计的积累电荷量来校正检测元件的测量光子计数。 这允许由补偿电荷引起的光子计数速率的损坏并且改善光子计数的确定。

公开(公告)号：WO2013144812A2

公开(公告)日：2013-10-03

申请号：PCT/IB2013/052354

申请日：2013-03-25

Applicant: KONINKLIJKE PHILIPS N.V. ,  PHILIPS DEUTSCHLAND GMBH

Inventor： DAERR, Heiner ,  RÖSSL, Ewald

IPC: G01T1/17

CPC classification number: G01T1/18 ,  A61B6/032 ,  A61B6/4241 ,  A61B6/482 ,  A61B6/585 ,  G01N23/046 ,  G01T1/171 ,  G01T1/248

Abstract: An imaging system (600)includes a radiation source (608) that emits polychromatic radiation that traverses an examination region and a detector array (610) located opposite the radiation source, across the examination region, which includes a paralyzable photon counting detector pixel (611) that detects photons of the radiation that traverse the examination region and illuminate the detector pixel and that generates a signal indicative of each detected photon. An output photon count rate to input photon count rate map (626) includes at least one map which maps multiple input photon count rates of the detector pixel to a single output photon count rate of the detector pixel, and an input photon count rate determiner (624) identifies one input photon count rate of the multiple input photon count rates of the map as a correct input photon count rate for the detector pixel. A reconstructor that reconstructs the signal based on the identified input photon count rate.

Abstract translation: 成像系统（600）包括：放射源（608），其辐射穿过检查区域的多色辐射;以及跨越检查区域的与辐射源相对的检测器阵列（610），该检测器阵列包括可分离的光子计数检测器像素（611 ），其检测穿过检查区域的辐射的光子并照亮检测器像素，并产生指示每个检测到的光子的信号。 输入光子计数速率到输入光子计数率图（626）包括至少一个映射，其将检测器像素的多个输入光子计数率映射到检测器像素的单个输出光子计数率，以及输入光子计数率确定器 624）将映射的多输入光子计数率的一个输入光子计数率识别为检测器像素的正确输入光子计数率。 一种基于所识别的输入光子计数率来重建信号的重建器。

公开(公告)号：WO2022023082A1

公开(公告)日：2022-02-03

申请号：PCT/EP2021/070004

申请日：2021-07-16

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： ERHARD, Klaus, Alfred ,  DAERR, Heiner ,  SOSSIN, Artur ,  THRAN, Axel ,  BRENDEL, Bernhard, Johannes ,  HAASE, Christian ,  BONTUS, Claas

IPC: A61B6/12 ,  A61B6/00 ,  A61B90/00 ,  A61B6/03 ,  A61F2/852

Abstract: A spectral X-ray imaging system (100) includes an X-ray source (110) and an X-ray detector (120) that are mounted to a support structure (150). The support structure (150) is configured to rotate the X-ray source (110) and the X-ray detector (120) around two or more orthogonal axes (A - A’, B - B’). One or more processors (130) are configured to cause the system (100) to perform operations that include: generating a spectral image based on the spectral image data; and identifying, in the spectral image, a position of a first fiducial marker (180i) comprising a first material, based on a first X-ray absorption k-edge energy value (190i) of the first material.