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1. 发明授权

US08861674B2 Computed tomography apparatus 有权
标题翻译：计算机断层摄影仪
公开(公告)号：US08861674B2
公开(公告)日：2014-10-14
申请号：US13509840
申请日：2010-12-10
申请人： Thomas Koehler , Roland Proksa , Ewald Roessl
发明人： Thomas Koehler , Roland Proksa , Ewald Roessl
IPC分类号： A61B6/00 , A61B6/03 , G01N23/04 , G06T11/00
CPC分类号： A61B6/032 , A61B6/469 , A61B6/542 , G01N23/046 , G01N2223/419 , G06T11/005 , Y10S378/901
摘要： 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.
摘要翻译：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）根据辐射（4）的调制提供用于对检测值进行加权的调制权重，并且重建单元（15）重建对象的图像，其中基于所提供的调制对所述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。

2. 发明申请

US20120250821A1 COMPUTED TOMOGRAPHY APPARATUS 有权
标题翻译：计算机摄影装置
公开(公告)号：US20120250821A1
公开(公告)日：2012-10-04
申请号：US13509840
申请日：2010-12-10
申请人： Thomas Koehler , Roland Proksa , Ewald Roessl
发明人： Thomas Koehler , Roland Proksa , Ewald Roessl
IPC分类号： G01N23/04
CPC分类号： A61B6/032 , A61B6/469 , A61B6/542 , G01N23/046 , G01N2223/419 , G06T11/005 , Y10S378/901
摘要： 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.
摘要翻译：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）根据辐射（4）的调制提供用于对检测值进行加权的调制权重，并且重建单元（15）重建对象的图像，其中基于所提供的调制对所述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。

3. 发明授权

US09423515B2 Photon counting detector 有权
标题翻译：光子计数检测器
公开(公告)号：US09423515B2
公开(公告)日：2016-08-23
申请号：US14237916
申请日：2012-08-16
申请人： Ewald Roessl , Roland Proksa
发明人： Ewald Roessl , Roland Proksa
IPC分类号： G01T1/24
CPC分类号： G01T1/24 , G01T1/241 , G01T1/247
摘要： A detector array includes at least one direct conversion detector pixel (114-114M) configured to detect photons of poly-chromatic ionizing radiation. The pixel includes a cathode layer (116), an anode layer (118) including an anode electrode (118-118 M ) for each of the at least one detector pixels, a direct conversion material (120), disposed between the cathode layer and the anode layer, and a gate electrode disposed in the direct conversion material, parallelto and between the cathode and anode layers.
摘要翻译：检测器阵列包括被配置为检测多色电离辐射的光子的至少一个直接转换检测器像素（114-114M）。所述像素包括阴极层（116），包括用于所述至少一个检测器像素中的每一个的阳极电极（118-118M）的阳极层（118）;直接转换材料（120），设置在所述阴极层和阳极层和设置在直接转换材料中的栅极，平行于阴极和阳极层之间。

4. 发明授权

US09177397B2 Imaging apparatus 有权
标题翻译：成像设备
公开(公告)号：US09177397B2
公开(公告)日：2015-11-03
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： G06K9/00 , G06T11/00 , G01N23/04 , A61B6/03 , A61B6/00
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。

5. 发明申请

US20110096892A1 SPECTRAL CT 有权
标题翻译：光谱CT
公开(公告)号：US20110096892A1
公开(公告)日：2011-04-28
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： H05G1/60
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）。

6. 发明申请

US20140005971A1 LIKELIHOOD-BASED SPECTRAL DATA PROJECTION DOMAIN DE-NOISING 审中-公开
标题翻译：基于LIKELIHOOD的光谱数据投影域名消除
公开(公告)号：US20140005971A1
公开(公告)日：2014-01-02
申请号：US14005041
申请日：2012-03-02
申请人： Ewald Roessl , Roland Proksa
发明人： Ewald Roessl , Roland Proksa
IPC分类号： G01T7/00
CPC分类号： G01T7/005 , G06T11/005 , G06T2211/408
摘要： 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.
摘要翻译：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。

7. 发明申请

US20100187429A1 RADIATION DETECTOR WITH MULTIPLE ELECTRODES ON A SENSITIVE LAYER 有权
标题翻译：辐射探测器与敏感层上的多个电极
公开(公告)号：US20100187429A1
公开(公告)日：2010-07-29
申请号：US12514595
申请日：2007-11-12
申请人： Klaus J. Engel , Guenter Zeitler , Christian Baeumer , Christoph Herrmann , Jens Wiegert , Roland Proksa , Ewald Roessl , Roger Steadman Booker
发明人： Klaus J. Engel , Guenter Zeitler , Christian Baeumer , Christoph Herrmann , Jens Wiegert , Roland Proksa , Ewald Roessl , Roger Steadman Booker
IPC分类号： G01T1/24
CPC分类号： G01T1/2928
摘要： The invention relates to a radiation detector (200), particularly an X-ray detector, which comprises at least one sensitive layer (212) for the conversion of incident photons (X) into electrical signals. A two-dimensional array of electrodes (213) is located on the front side of the sensitive layer (212), while its back side carries a counter-electrode (211). The size of the electrodes (213) may vary in radiation direction (y) for adapting the counting workload of the electrodes. Moreover, the position of the electrodes (213) with respect to the radiation direction (y) provides information about the energy of the detected photons (X).
摘要翻译：本发明涉及一种辐射探测器（200），特别是一种X射线检测器，其包括用于将入射光子（X）转换成电信号的至少一个敏感层（212）。电极（213）的二维阵列位于敏感层（212）的前侧，而其背面承载对电极（211）。电极（213）的尺寸可以在辐射方向（y）上变化，以适应电极的计数工作量。此外，电极（213）相对于辐射方向（y）的位置提供关于检测到的光子（X）的能量的信息。

8. 发明授权

US09928585B2 Spectral imaging 有权
公开(公告)号：US09928585B2
公开(公告)日：2018-03-27
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： A61B6/00 , G06T7/00 , G06T11/00
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.

9. 发明授权

US08585286B2 Spectral detector calibration 有权
标题翻译：光谱检测器校准
公开(公告)号：US08585286B2
公开(公告)日：2013-11-19
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。

10. 发明申请

US20140183371A1 PHOTON COUNTING DETECTOR 有权
标题翻译：光电计数检测器
公开(公告)号：US20140183371A1
公开(公告)日：2014-07-03
申请号：US14237916
申请日：2012-08-16
申请人： Ewald Roessl , Roland Proksa
发明人： Ewald Roessl , Roland Proksa
IPC分类号： G01T1/24
CPC分类号： G01T1/24 , G01T1/241 , G01T1/247
摘要： A detector array includes at least one direct conversion detector pixel (114-114M) configured to detect photons of poly-chromatic ionizing radiation. The pixel includes a cathode layer (116), an anode layer (118) including an anode electrode (118-118 M ) for each of the at least one detector pixels, a direct conversion material (120), disposed between the cathode layer and the anode layer, and a gate electrode disposed in the direct conversion material, parallelto and between the cathode and anode layers.
摘要翻译：检测器阵列包括被配置为检测多色电离辐射的光子的至少一个直接转换检测器像素（114-114M）。所述像素包括阴极层（116），包括用于所述至少一个检测器像素中的每一个的阳极电极（118-118M）的阳极层（118）;直接转换材料（120），设置在所述阴极层和阳极层和设置在直接转换材料中的栅极，平行于阴极和阳极层之间。

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