公开(公告)号：US20140112565A1

公开(公告)日：2014-04-24

申请号：US14125149

申请日：2012-06-07

申请人： Ewald Roessl ,  Axel Thran ,  Roland Proksa

发明人： Ewald Roessl ,  Axel Thran ,  Roland Proksa

IPC分类号： G06T11/00

CPC分类号： G06T11/005 ,  A61B6/032 ,  A61B6/482 ,  A61B6/583 ,  G01N23/046 ,  G01N2223/401 ,  G01N2223/419 ,  G06T2211/408

摘要： The invention relates to an imaging apparatus (31) for imaging an object. A reconstruction unit (12) determines component projection data values, which correspond to, for example, a base material of the object, and reconstructs an image of the object based on the determined component projection data values. A component projection data value, which corresponds to a ray, is determined as a combination of weighted base functions, which depend on energy projection data values of the same ray and the orientation of the same ray. This allows considering a possible dependency of the corresponding decomposition on the orientation of the ray, thereby allowing the imaging apparatus to improve the quality of decomposing the provided energy projection data values into the component projection data values and thus of a finally reconstructed image of the object, which is reconstructed based on the component projection data values.

摘要翻译： 本发明涉及一种用于对物体成像的成像装置（31）。 重建单元（12）确定与例如对象的基础材料相对应的分量投影数据值，并且基于所确定的分量投影数据值来重构对象的图像。 对应于射线的分量投影数据值被确定为加权基函数的组合，其依赖于相同射线的能量投影数据值和相同射线的取向。 这允许考虑相应分解对于射线取向的可能依赖性，从而允许成像装置提高将所提供的能量投影数据值分解成分量投影数据值并因此提高对象的最终重建图像的质量 ，其基于分量投影数据值被重建。

公开(公告)号：US20130308847A1

公开(公告)日：2013-11-21

申请号：US13981608

申请日：2012-01-12

申请人： Carsten Oliver Schirra ,  Gregory Lanza ,  Roland Proksa ,  Ewald Roessl ,  Axel Thran ,  Robert Manzke

发明人： Carsten Oliver Schirra ,  Gregory Lanza ,  Roland Proksa ,  Ewald Roessl ,  Axel Thran ,  Robert Manzke

IPC分类号： G06T7/00

CPC分类号： G06T7/0012 ,  A61B6/481 ,  A61B6/482 ,  G06T11/005 ,  G06T2211/408

摘要： A method includes analyzing a spectral projection image of a portion of a subject, generating a value quantifying an amount of a target specific contrast material in a region of interest of the spectral projection image, and generating a signal indicative of a presence of the target in response to the value satisfying a predetermined threshold level.

摘要翻译： 一种方法包括分析对象的一部分的光谱投影图像，产生量化在所述光谱投影图像的感兴趣区域中的目标特定对比度材料的量的值，以及生成指示所述目标的存在的信号 响应于满足预定阈值水平的值。

公开(公告)号：US08442184B2

公开(公告)日：2013-05-14

申请号：US12996985

申请日：2009-06-01

申请人： Peter Forthmann ,  Udo Van Stevendaal ,  Ewald Roessl ,  Michael Grass ,  Roland Proksa ,  Jens-Peter Schlomka

发明人： Peter Forthmann ,  Udo Van Stevendaal ,  Ewald Roessl ,  Michael Grass ,  Roland Proksa ,  Jens-Peter Schlomka

IPC分类号： A61B6/00

CPC分类号： A61B6/405 ,  A61B6/032 ,  A61B6/4014 ,  A61B6/4035 ,  A61B6/4042 ,  A61B6/4241 ,  A61B6/482

摘要： An imaging system includes a radiation source (106, T1, T2, T3) that rotates about an examination region and emits radiation that traverses the examination region. The radiation source (106, T1, T2, T3) emits radiation having an energy spectrum that is selectively alternately switched between at least two different energy spectra during an imaging procedure. The system further includes an energy-resolving detector array (116, D1, D2, D3) that detects radiation traversing the examination region. The energy-resolving detector array (116, D1, D2, D3) resolves the detected radiation over at least two different energy ranges and produces energy-resolved output signals as a function of both emission energy spectrum and energy range. The system further includes a reconstructor (126) that performs a spectral reconstruction of the energy-resolved output signals. In another embodiment, the detector array (116) includes a photon-counting detector array (116).

摘要翻译： 成像系统包括围绕检查区域旋转并且发射穿过检查区域的辐射的辐射源（106，T1，T2，T3）。 辐射源（106，T1，T2，T3）发射具有在成像过程期间在至少两个不同能量谱之间选择性交替切换的能谱的辐射。 该系统还包括检测穿过检查区域的辐射的能量分辨检测器阵列（116，D1，D2，D3）。 能量分辨检测器阵列（116，D1，D2，D3）通过至少两个不同的能量范围来解析检测到的辐射，并且产生作为发射能量谱和能量范围的函数的能量分辨的输出信号。 该系统还包括执行能量分辨输出信号的频谱重建的重建器（126）。 在另一个实施例中，检测器阵列（116）包括光子计数检测器阵列（116）。

公开(公告)号：US08373134B2

公开(公告)日：2013-02-12

申请号：US12809079

申请日：2008-12-26

申请人： Ewald Roessl ,  Roland Proksa

发明人： Ewald Roessl ,  Roland Proksa

IPC分类号： H01L27/146

CPC分类号： H01L27/1463 ,  H01L27/14659

摘要： To mitigate the influence of charge sharing occurring in semiconductor detectors, an improved semiconductor detector (200) is provided, which comprises: a plurality of anodes (210) arranged to form at least one opening (230), each opening being formed by two anodes in the plurality of anodes; at least one cathode (220); a detector cell (240) located between the plurality of anodes and the at least one cathode; wherein the detector cell comprises at least one groove (250), each of the at least one groove having a first opening (252) aligned with one of the at least one opening being formed by two anodes in the plurality of anodes, each of the at least one groove extending towards the at least one cathode. By forming grooves in the detector cell, the charge cloud generated by a single photon can be received by a corresponding anode instead of several neighboring anodes, which thereby improves the spectral resolution and count rate of a semiconductor detector.

摘要翻译： 为了减轻在半导体检测器中发生的电荷共享的影响，提供了一种改进的半导体检测器（200），其包括：多个阳极（210），被布置成形成至少一个开口（230），每个开口由两个阳极形成 在多个阳极中; 至少一个阴极（220）; 位于所述多个阳极和所述至少一个阴极之间的检测器单元（240）; 其中所述检测器单元包括至少一个凹槽（250），所述至少一个凹槽中的每个凹槽具有与所述多个阳极中的两个阳极形成的所述至少一个开口中的一个开口对准的第一开口（252） 至少一个凹槽，朝向所述至少一个阴极延伸。 通过在检测器单元中形成凹槽，由单个光子产生的电荷云可由相应的阳极代替几个相邻的阳极来接收，从而提高半导体检测器的光谱分辨率和计数率。

公开(公告)号：US20110019794A1

公开(公告)日：2011-01-27

申请号：US12809079

申请日：2008-12-26

申请人： Ewald Roessl ,  Roland Proksa

发明人： Ewald Roessl ,  Roland Proksa

IPC分类号： A61B6/03 ,  H01L27/146

CPC分类号： H01L27/1463 ,  H01L27/14659

摘要： To mitigate the influence of charge sharing occurring in semiconductor detectors, an improved semiconductor detector (200) is provided, which comprises: a plurality of anodes (210) arranged to form at least one opening (230), each opening being formed by two anodes in the plurality of anodes; at least one cathode (220); a detector cell (240) located between the plurality of anodes and the at least one cathode; wherein the detector cell comprises at least one groove (250), each of the at least one groove having a first opening (252) aligned with one of the at least one opening being formed by two anodes in the plurality of anodes, each of the at least one groove extending towards the at least one cathode. By forming grooves in the detector cell, the charge cloud generated by a single photon can be received by a corresponding anode instead of several neighboring anodes, which thereby improves the spectral resolution and count rate of a semiconductor detector.

摘要翻译： 为了减轻在半导体检测器中发生的电荷共享的影响，提供了一种改进的半导体检测器（200），其包括：多个阳极（210），被布置成形成至少一个开口（230），每个开口由两个阳极形成 在多个阳极中; 至少一个阴极（220）; 位于所述多个阳极和所述至少一个阴极之间的检测器单元（240）; 其中所述检测器单元包括至少一个凹槽（250），所述至少一个凹槽中的每个凹槽具有与所述多个阳极中的两个阳极形成的所述至少一个开口中的一个开口对准的第一开口（252） 至少一个凹槽，朝向所述至少一个阴极延伸。 通过在检测器单元中形成凹槽，由单个光子产生的电荷云可由相应的阳极代替几个相邻的阳极来接收，从而提高半导体检测器的光谱分辨率和计数率。

公开(公告)号：US20100104161A1

公开(公告)日：2010-04-29

申请号：US12529715

申请日：2008-03-03

申请人： Andy Ziegler ,  Ewald Roessl ,  Roland Proksa

发明人： Andy Ziegler ,  Ewald Roessl ,  Roland Proksa

IPC分类号： G06T5/00

CPC分类号： G06T11/005 ,  G06T5/002 ,  G06T5/20 ,  G06T2207/10081 ,  G06T2207/30004

摘要： 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.

摘要翻译： 本发明涉及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与能量相关的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：US08338791B2

公开(公告)日：2012-12-25

申请号：US12665558

申请日：2008-05-23

申请人： Roland Proksa ,  Jens-Peter Schlomka ,  Ewald Roessl ,  Tuvia Liran ,  Aviv Marks

发明人： Roland Proksa ,  Jens-Peter Schlomka ,  Ewald Roessl ,  Tuvia Liran ,  Aviv Marks

IPC分类号： G01J5/02

CPC分类号： G01T1/171

摘要： 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.

摘要翻译： 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：US08213566B2

公开(公告)日：2012-07-03

申请号：US13000371

申请日：2009-06-22

申请人： Ewald Roessl ,  Roland Proksa ,  Jens-Peter Schlomka

发明人： Ewald Roessl ,  Roland Proksa ,  Jens-Peter Schlomka

IPC分类号： A61B6/00 ,  G06K9/00

CPC分类号： G01N23/087 ,  A61B5/4869 ,  A61B6/032 ,  A61B6/4241 ,  A61B6/481 ,  A61B6/482

摘要： An imaging system including a radiation source (110) that emits poly-chromatic radiation that traverses an examination region and a detector (116) that detects radiation traversing the examination region and produces a signal indicative of the energy of a detected photon. The system further includes an energy discriminator (122) that energy resolves the signal based on a plurality of different energy thresholds, wherein at least two of the energy thresholds have values corresponding to at least two different K-edge energies of two different elements in a mixture disposed in the examination region. The system also includes a signal decomposer (132) that decomposes the energy-resolved signal into at least a multi K-edge component representing the at least two different K-edge energies. In one instance, a stoichiometric ratio of the two different elements in the contrast agent is known and substantially constant.

摘要翻译： 一种成像系统，包括发射穿过检查区域的多色辐射的辐射源（110）和检测穿过检查区域的辐射的检测器（116），并产生指示检测到的光子的能量的信号。 所述系统还包括能量鉴别器（122），所述能量鉴别器（122）能量基于多个不同的能量阈值来解析所述信号，其中所述能量阈值中的至少两个具有对应于两个不同元素的至少两个不同K边能量的值 混合物置于检查区域。 该系统还包括信号分解器（132），其将能量分辨信号分解成代表至少两个不同的K边缘能量的至少多个K边缘分量。 在一种情况下，造影剂中两种不同元素的化学计量比是已知的并且基本上是恒定的。

公开(公告)号：US20110096905A1

公开(公告)日：2011-04-28

申请号：US13000371

申请日：2009-06-22

申请人： Ewald Roessl ,  Roland Proksa ,  Jens-Peter Schlomka

发明人： Ewald Roessl ,  Roland Proksa ,  Jens-Peter Schlomka

IPC分类号： G01N23/04

CPC分类号： G01N23/087 ,  A61B5/4869 ,  A61B6/032 ,  A61B6/4241 ,  A61B6/481 ,  A61B6/482

摘要： An imaging system including a radiation source (110) that emits poly-chromatic radiation that traverses an examination region and a detector (116) that detects radiation traversing the examination region and produces a signal indicative of the energy of a detected photon. The system further includes an energy discriminator (122) that energy resolves the signal based on a plurality of different energy thresholds, wherein at least two of the energy thresholds have values corresponding to at least two different K-edge energies of two different elements in a mixture disposed in the examination region. The system also includes a signal decomposer (132) that decomposes the energy-resolved signal into at least a multi K-edge component representing the at least two different K-edge energies. In one instance, a stoichiometric ratio of the two different elements in the contrast agent is known and substantially constant.

摘要翻译： 一种成像系统，包括发射穿过检查区域的多色辐射的辐射源（110）和检测穿过检查区域的辐射的检测器（116），并产生指示检测到的光子的能量的信号。 所述系统还包括能量鉴别器（122），所述能量鉴别器（122）能量基于多个不同的能量阈值来解析所述信号，其中所述能量阈值中的至少两个具有对应于两个不同元素的至少两个不同K边能量的值 混合物置于检查区域。 该系统还包括信号分解器（132），其将能量分辨信号分解成代表至少两个不同的K边缘能量的至少多个K边缘分量。 在一种情况下，造影剂中两种不同元素的化学计量比是已知的并且基本上是恒定的。

公开(公告)号：US20110012014A1

公开(公告)日：2011-01-20

申请号：US12934661

申请日：2009-03-20

申请人： Amir Livne ,  Naor Wainer ,  Jens-Peter Schlomka ,  Ewald Roessl ,  Roland Proksa

发明人： Amir Livne ,  Naor Wainer ,  Jens-Peter Schlomka ,  Ewald Roessl ,  Roland Proksa

IPC分类号： G01D18/00

CPC分类号： G01T7/005 ,  A61B6/032 ,  A61B6/4035 ,  A61B6/4042 ,  A61B6/4441 ,  A61B6/482 ,  A61B6/585 ,  G01N2223/3037 ,  G01T1/1647

摘要： A method includes detecting radiation that traverses a material having a known spectral characteristic with a radiation sensitive detector pixel that outputs a signal indicative of the detected radiation and determining a mapping between the output signal and the spectral characteristic. The method further includes determining an energy of a photon detected by the radiation sensitive detector pixel based on a corresponding output of the radiation sensitive detector pixel and the mapping.

摘要翻译： 一种方法包括利用辐射敏感检测器像素检测穿过具有已知光谱特性的材料的辐射，所述辐射敏感检测器像素输出指示检测到的辐射的信号并确定输出信号和光谱特性之间的映射。 该方法还包括基于辐射敏感检测器像素的对应输出和映射来确定由辐射敏感检测器像素检测到的光子的能量。