公开(公告)号：WO2008093275A3

公开(公告)日：2008-11-06

申请号：PCT/IB2008050294

申请日：2008-01-28

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

Inventor： PROKSA ROLAND

IPC: G01T1/29

CPC classification number: G01T1/2928 ,  A61B6/027

Abstract: Photon counting detectors may suffer from pulse sharing effects and fluorescence photon generation, which may lead to a degradation of the measured signals. According to an exemplary embodiment of the present invention, a detector unit is provided which is adapted for performing a coincidence detection and correction by comparing detection events of neighbouring cells, thereby providing for a coincidence identification followed by an individual coincidence correction. In order to reduce the number of coincidence detection and corresponding units per detector unit, a specific detector cell geometry may be applied.

Abstract translation: 光子计数检测器可能受到脉冲共享效应和荧光光子产生的影响，这可能导致测量信号的退化。 根据本发明的示例性实施例，提供了一种检测器单元，其适于通过比较相邻单元的检测事件来执行一致性检测和校正，由此提供重合识别，随后进行单独重合校正。 为了减少每个检测器单元的重合检测和对应单元的数量，可以应用特定的检测器单元几何形状。

公开(公告)号：WO2008068674A2

公开(公告)日：2008-06-12

申请号：PCT/IB2007054834

申请日：2007-11-29

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

Inventor： PROKSA ROLAND

IPC: A61B6/00

CPC classification number: A61B6/504 ,  A61B6/032 ,  A61B6/4241 ,  A61B6/481 ,  A61B6/482 ,  A61B6/507 ,  Y10S378/901

Abstract: The invention relates to a CT imaging system for determining the flow of a substance within an object, wherein the CT imaging system comprises a polychromatic X-ray source and an energy-resolving X-ray detector for obtaining detection signals depending on the X-ray radiation after passing through the object. A calculation unit (12) determines a k-edge 5 component of the substance from the detection signals, and a reconstruction unit (13) reconstructs a time series of k-edge image from the determined k-edge component. A flow determination unit (14) determines flow values indicative for the flow within the object from the time series of k-edge images.

Abstract translation: 本发明涉及一种用于确定物体内物质流动的CT成像系统，其中CT成像系统包括多色X射线源和能量分辨X射线检测器，用于根据X射线获得检测信号 穿过物体后的辐射。 计算单元（12）根据检测信号确定物质的k边缘5分量，重建单元（13）根据确定的k边缘分量重构k边缘图像的时间序列。 流量确定单元（14）根据k边缘图像的时间序列确定指示对象内的流动的流量值。

公开(公告)号：WO2006117720A2

公开(公告)日：2006-11-09

申请号：PCT/IB2006051285

申请日：2006-04-25

Applicant: PHILIPS INTELLECTUAL PROPERTY ,  KONINKL PHILIPS ELECTRONICS NV ,  PROKSA ROLAND ,  GRASS MICHAEL

Inventor： PROKSA ROLAND ,  GRASS MICHAEL

CPC classification number: G01T1/2985 ,  G01N23/046 ,  G01N2223/419 ,  G01V5/0041 ,  G01V5/005

Abstract: Spectral CT systems require cheap detectors with high energy resolution. According to an aspect of the present invention, a computer tomography apparatus comprises a detector element which is segmented into a plurality of sub-pixels. Each sub-pixel has at least two thresholds and counting channels, wherein the second threshold for each sub-pixel varies over the nominal detector element. This may provide for an improved energy-resolved photon counting.

Abstract translation: 光谱CT系统需要具有高能量分辨率的廉价检测器。 根据本发明的一个方面，一种计算机断层摄影装置包括被分割成多个子像素的检测器元件。 每个子像素具有至少两个阈值和计数通道，其中每个子像素的第二阈值在标称检测器元件上变化。 这可以提供改进的能量分辨光子计数。

公开(公告)号：WO2006109233A2

公开(公告)日：2006-10-19

申请号：PCT/IB2006051086

申请日：2006-04-10

Applicant: PHILIPS INTELLECTUAL PROPERTY ,  KONINKL PHILIPS ELECTRONICS NV ,  KOEHLER THOMAS ,  PROKSA ROLAND ,  ZIEGLER ANDY

Inventor： KOEHLER THOMAS ,  PROKSA ROLAND ,  ZIEGLER ANDY

IPC: G06T11/00

CPC classification number: G06T11/008 ,  G06T11/006

Abstract: The invention relates to an examination apparatus with an X-ray device (10) for circular or helical cone-beam CT acquisition of projections images (P i (E 1 ), P i (E 2 )) of a patient (1) with different energy spectra (E 1 , E 2 ) and/or with an energy -resolved detection. By a combination of the projections, images (I bone , i , I tissue , i ) can be calculated that show predominantly the bone structure and the soft tissue, respectively. Therefore, a 3D model (M bone ) of the bone structure and a 3D model (M tissue ) of the tissue can be reconstructed separately. After removal of artifacts from the bone- structure model (M bone ), both separate 3D models can be integrated to a combined model (M) of the body volume with a high image quality.

Abstract translation: 本发明涉及一种具有X射线装置（10）的检查装置，用于对投影图像进行圆形或螺旋锥束CT采集（P 1） 具有不同能量谱的患者（1）的患者（1）的患者（E 2） >）和/或用能量分辨检测。 通过投影的组合，可以计算出图像（I ，，I ，SUB> i） 主要分别显示骨骼结构和软组织。 因此，可以分别重建组织的骨骼结构的3D模型（M＆gt;骨头）和3D模型（M＆gt;组织）。 在从骨结构模型（骨骼）中去除人造物之后，两个分开的3D模型可以被集成到具有高图像质量的身体体积的组合模型（M）上。

公开(公告)号：WO2010015953A3

公开(公告)日：2010-04-01

申请号：PCT/IB2009053052

申请日：2009-07-14

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

Inventor： PROKSA ROLAND

IPC: G06T11/00

CPC classification number: G06T11/006 ,  G06T2211/408

Abstract: A system includes an image estimator (128) that generates estimated native image data from data acquired when a K-edge material is present in a scanned region during data acquisition, wherein the estimated native image data is indicative of native image data generated from data acquired when the K-edge material is not present in the scanned region during the data acquisition.

Abstract translation: 一种系统包括图像估计器（128），其在数据采集期间当在扫描区域中存在K边缘材料时获取的数据产生估计的本机图像数据，其中所估计的本机图像数据指示从获取的数据生成的本机图像数据 当在数据采集期间K边缘材料不存在于扫描区域中时。

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：WO2008135897A3

公开(公告)日：2009-05-14

申请号：PCT/IB2008051628

申请日：2008-04-28

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

Inventor： PROKSA ROLAND

IPC: G01T1/29

CPC classification number: G01T1/2985 ,  A61B6/032 ,  A61B6/4241 ,  A61B6/482

Abstract: The invention relates to a detection device for detecting radiation, wherein the detection device (6) comprises at least one first region (14) and at least one second region (15). In the at least one first region detector elements (16) are present, which are different from detector elements (17) present in the at least one second region (15). Preferentially, the at least one second region (15) is an inner region and the at least first region (14) is an outer region of the detection device (6) and in the at least one second region (15) photon-counting detector elements are present. In the at least one first region (14) preferentially non-energy- resolving detector elements are present. The invention relates further to an imaging system for imaging a region of interest comprising this detection device.

Abstract translation: 本发明涉及一种用于检测辐射的检测装置，其中检测装置（6）包括至少一个第一区域（14）和至少一个第二区域（15）。 在至少一个第一区域中，存在与存在于至少一个第二区域（15）中的检测器元件（17）不同的检测器元件（16）。 优选地，所述至少一个第二区域（15）是内部区域，并且所述至少第一区域（14）是所述检测装置（6）的外部区域，并且所述至少一个第二区域（15）中的光子计数检测器 元素存在。 在至少一个第一区域（14）中优选存在非能量分辨检测器元件。 本发明还涉及一种用于对包括该检测装置的感兴趣区域成像的成像系统。

公开(公告)号：WO2009027904A3

公开(公告)日：2009-04-30

申请号：PCT/IB2008053353

申请日：2008-08-21

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  PHILIPS INTELLECTUAL PROPERTY ,  PROKSA ROLAND ,  THRAN AXEL ,  GRASS MICHAEL

Inventor： PROKSA ROLAND ,  THRAN AXEL ,  GRASS MICHAEL

IPC: A61B6/03

CPC classification number: A61B6/4014 ,  A61B6/027 ,  A61B6/032 ,  A61B6/4028 ,  A61B6/503 ,  A61B6/508 ,  G01T1/1644 ,  H01J2235/00

Abstract: The invention relates to an X-rayimaging system (100) like a CT-scanner. In a preferred embodiment of the system, a cylindrical X-raydetector(130) is sandwiched between two cylindrical X-raysources (110, 120) or vice versa. The X-raysources preferably comprise cathodes with carbon nanotubes and a multitude of focal spots(111) that can selectively be controlled. The cylinder-diameters of the X-raysource and the X-raydetector may be the same or, preferably, be different. Moreover, the X-raysource and the X-ray detector preferably extend circumferentially over less than the full angle of 360°.

Abstract translation: 本发明涉及像CT扫描仪的X射线成像系统（100）。 在系统的优选实施例中，圆柱形X射线检测器（130）夹在两个圆柱形X射线源（110,120）之间，反之亦然。 X射线源优选地包括具有碳纳米管的阴极和可以选择性地被控制的多个焦点（111）。 X射线源和X射线检测器的圆筒直径可以相同或优选地不同。 此外，X射线源和X射线检测器优选地圆周地延伸小于360°的全角。

公开(公告)号：WO2007034359A3

公开(公告)日：2008-11-06

申请号：PCT/IB2006053227

申请日：2006-09-12

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

Inventor： PROKSA ROLAND

IPC: A61B6/03

CPC classification number: A61B6/032 ,  A61B6/4241 ,  A61B6/482

Abstract: The present invention relates to a CT system for determining the quantitative material concentrations of the components, such as bone, blood, contrast agent, in a region of interest of an object, such as a patient. To provide a CT system which improves the quality and explanatory power of quantitative material decomposition, a CT system is proposed comprising: a scanning unit (102) having a radiation source (10) and a detector unit (12) for acquisition of spectral CT projection data from said region of interest; a modeling unit (104) for obtaining a photoelectric effect projection data set and a Compton effect projection data set by decomposing said spectral CT projection data set by means of respective models of photoelectric effect and Compton effect; a reconstruction unit (106) for reconstructing a photoelectric effect image and a Compton effect image of said region of interest from said photoelectric effect projection data set and Compton effect projection data set; a processing unit (108) for determining the concentrations of said components in said region of interest by solving a system of equations obtained by equating said photoelectric effect image data with the accumulated products of said concentrations and photoelectric attenuation coefficients for said components and equating said Compton effect image data with the accumulated products of said concentrations and Compton attenuation coefficients for said components. The invention relates further to a corresponding data processing device and method.

Abstract translation: 本发明涉及一种用于确定物体（例如患者）的感兴趣区域中的组分（例如骨骼，血液，造影剂）的定量材料浓度的CT系统。 为了提供提高定量材料分解的质量和解释力的CT系统，提出了一种CT系统，包括：具有辐射源（10）的扫描单元（102）和用于采集光谱CT投影的检测器单元（12） 来自该地区的数据; 用于通过利用光电效应和康普顿效应的各自模型分解所述光谱CT投影数据集来获得光电效应投影数据集和康普顿效应投影数据集的建模单元（104） 重建单元（106），用于从所述光电效应投影数据集和康普顿效应投影数据集重建光电效应图像和所述感兴趣区域的康普顿效应图像; 处理单元（108），用于通过求解通过将所述光电效应图像数据与所述浓度的累积积和所述分量的光电衰减系数相等而获得的等式来确定所述感兴趣区域中的所述分量的浓度，并将所述康普顿 影响图像数据与所述分量的积分积和康普顿衰减系数。 本发明还涉及相应的数据处理装置和方法。

公开(公告)号：WO2006000997A3

公开(公告)日：2007-04-26

申请号：PCT/IB2005052090

申请日：2005-06-24

Applicant: PHILIPS INTELLECTUAL PROPERTY ,  KONINKL PHILIPS ELECTRONICS NV ,  NIELSEN TIM ,  ZIEGLER ANDY ,  KOEHLER THOMAS ,  PROKSA ROLAND

Inventor： NIELSEN TIM ,  ZIEGLER ANDY ,  KOEHLER THOMAS ,  PROKSA ROLAND

IPC: G06T11/00

CPC classification number: G06T11/006 ,  A61B6/027 ,  G06T2211/421 ,  Y10S378/901

Abstract: The invention relates to an imaging method, especially a computerized tomography method, with which an object is penetrated by rays from different directions and measured values, which depend upon the intensity of the rays after penetrating the object, are acquired by a detector unit. From these measured values, an object image is reconstructed by means of back projection of measured-value-dependent back projection values. Therein, the object image is divided into overlapping, quasi-spherically symmetric image segments, each being defined by an image value and a quasi-spherically symmetric base function. Furthermore, during the back projection, the back projection values are added in proportions to the image values, wherein the proportion of a back projection value, which is added during the back projection to an image value, is dependent on a proportionality factor, which is equal to the average value of the line integrals of the base function belonging to the respective image value along those rays that have generated the measured value, on which the respective back projection value is dependent.

Abstract translation: 本发明涉及一种成像方法，特别是计算机断层摄影方法，其中物体被来自不同方向的光线穿透，并且测量值取决于穿透物体之后的光线的强度，由检测器单元获取。 从这些测量值，通过背投影测量值依赖的反投影值重建对象图像。 其中，对象图像被划分为重叠的准球形对称图像片段，每个片段由图像值和准球形对称的基本功能定义。 此外，在背投影期间，反投影值以与图像值成比例的方式相加，其中在后投影中添加的反投影值与图像值的比例取决于比例因子，即比例因子 等于属于相应图像值的基本功能的线积分的平均值，沿着相应的背投影值依赖于已经产生测量值的那些射线。