公开(公告)号：DE50109118D1

公开(公告)日：2006-05-04

申请号：DE50109118

申请日：2001-04-26

Applicant: PHILIPS INTELLECTUAL PROPERTY

Inventor： GRASS MICHAEL ,  KOEHLER THOMAS ,  PROKSA ROLAND

IPC: G01B15/00 ,  G06T11/00 ,  A61B6/03 ,  G06T1/00

Abstract: The invention relates to a computed tomography method which involves a conical radiation beam which irradiates the examination zone along at least two trajectories that are offset relative to one another in the direction of the axis of rotation, the distance between the trajectories being chosen to be so large that voxels in an intermediate region are not completely irradiated neither in one trajectory nor in the other trajectory. The absorption distribution in this intermediate region can be reconstructed without loss of image quality when measuring data from both trajectories are combined.

公开(公告)号：DE59912486D1

公开(公告)日：2005-10-06

申请号：DE59912486

申请日：1999-07-28

Applicant: PHILIPS INTELLECTUAL PROPERTY

Inventor： PROKSA ROLAND ,  TIMMER JAN

IPC: A61B6/03 ,  G01N23/04

Abstract: The invention relates to a computer tomography apparatus in which the scanning trajectory is shaped as a helix and a conical radiation beam traverses the examination zone. According to the invention, the dimension of the detector window (or the part thereof which is used for the reconstruction) is a factor of 3, 5, 7 . . . larger than the distance between neighboring turns of the helix. Using this geometry, each voxel in the examination zone is irradiated exactly from an angular range of 3pi, 5pi, 7pi . . . when it traverses the cone beam. Such data acquisition yields an improved image quality.

公开(公告)号：DE10215890A1

公开(公告)日：2003-10-23

申请号：DE10215890

申请日：2002-04-11

Applicant: PHILIPS INTELLECTUAL PROPERTY

Inventor： GRASS MICHAEL ,  KOEHLER THOMAS ,  PROKSA ROLAND

IPC: A61B6/03 ,  G01N23/04 ,  G06T11/00 ,  G01N23/06 ,  H04N5/32

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。