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1. 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。

2. 发明授权

US09269471B2 Differential phase-contrast imaging with circular gratings 有权
标题翻译：圆形光栅的差分相位对比成像
公开(公告)号：US09269471B2
公开(公告)日：2016-02-23
申请号：US13260380
申请日：2010-03-15
申请人： Ewald Roessl , Thomas Koehler , Gerhard Martens
发明人： Ewald Roessl , Thomas Koehler , Gerhard Martens
IPC分类号： A61B6/03 , G21K7/00 , A61B6/00
CPC分类号： G21K7/00 , A61B6/4291 , A61B6/484 , A61B6/502
摘要： An X-ray differential phase-contrast imaging system has three circular gratings. The circular gratings are aligned with the optical axis of the radiation beam and a phase stepping is performed along the optical axis with the focal spot, the phase grating and/or the absorber grating. The signal measured is the phase-gradient in radial direction away from the optical axis.
摘要翻译： X射线差分相位成像系统具有三个圆形光栅。圆形光栅与辐射束的光轴对准，并且沿着光轴与焦斑，相位光栅和/或吸收光栅一起执行相位步进。测量的信号是远离光轴的径向相位梯度。

3. 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。

4. 发明申请

US20140169653A1 FREQUENCY DEPENDENT COMBINATION OF X-RAY IMAGES OF DIFFERENT MODALITIES 有权
标题翻译：不同模式的X射线图像的频率相关组合
公开(公告)号：US20140169653A1
公开(公告)日：2014-06-19
申请号：US14236668
申请日：2012-07-27
申请人： Hanns-Ingo Maack , Ewald Roessl , Thomas Koehler , Roland Proska
发明人： Hanns-Ingo Maack , Ewald Roessl , Thomas Koehler , Roland Proska
IPC分类号： G06T11/60
CPC分类号： G06T11/60 , A61B6/484 , G06T5/50 , G06T2207/10116 , G06T2207/20056 , G06T2207/20221 , G06T2207/30004
摘要： The present invention relates to X-ray imaging technology. In phase-contrast imaging, different types of image information, e.g. absorption image information and differential phase-contrast image information, may be obtained by a single image acquisition process. Individual types of image information comprise different image properties. The present invention relates to a frequency dependent combination of different types of image information to obtain a combined image having improved properties over the individual image information and their respective image information type. Accordingly, an apparatus (56) as well as a method (100) for image processing in X-ray imaging of an object is provided comprising receiving (102) first image information of the object of a first image information type, receiving (104) second image information of the object of a second image information type,wherein the second image information type is different from the first image information type. Subsequently the first image information and the second image information is combined (106) to obtain combined image information of the object, wherein the combination of the first image information and the second image information is a frequency-dependent combination, depending on the spatial frequency of the first image information and the second image information.
摘要翻译：本发明涉及X射线成像技术。在相位对比成像中，不同类型的图像信息，例如，吸收图像信息和差分相位差图像信息可以通过单个图像获取处理获得。各种类型的图像信息包括不同的图像属性。本发明涉及不同类型的图像信息的频率相关组合，以获得具有相对于各个图像信息及其各自的图像信息类型具有改进的特性的组合图像。因此，提供了一种装置（56）以及用于对象的X射线成像中的图像处理的方法（100），包括接收（102）第一图像信息类型的对象的第一图像信息，接收（104）第二图像信息类型的对象的第二图像信息，其中第二图像信息类型与第一图像信息类型不同。随后，将第一图像信息和第二图像信息组合（106）以获得对象的组合图像信息，其中第一图像信息和第二图像信息的组合是频率相关组合，其取决于第一图像信息和第二图像信息。

5. 发明授权

US08611489B2 Spectral imaging 有权
标题翻译：光谱成像
公开(公告)号：US08611489B2
公开(公告)日：2013-12-17
申请号：US13128889
申请日：2009-11-03
申请人： Ewald Roessl
发明人： Ewald Roessl
IPC分类号： A61B6/00
CPC分类号： G01T1/1647
摘要： A spectral processor (118) includes a first processing channel (120) that generates a first spectral signal derived from a detector signal, wherein the first spectral signal includes first spectral information about the detector signal, and a second processing channel (120) that generates a second spectral signal derived from the detector signal, wherein the second spectral signal includes second spectral information about the detector signal, wherein the first and second spectral signals are used to spectrally resolve the detector signal, and wherein the detector signal is indicative of detected polychromatic radiation.
摘要翻译：光谱处理器（118）包括产生从检测器信号导出的第一光谱信号的第一处理信道（120），其中第一光谱信号包括关于检测器信号的第一光谱信息，以及产生第二光谱信号从所述检测器信号导出的第二光谱信号，其中所述第二光谱信号包括关于所述检测器信号的第二光谱信息，其中所述第一和第二光谱信号用于对所述检测器信号进行光谱解析，并且其中所述检测器信号指示检测到的多色辐射。

6. 发明申请

US20120243658A1 PHASE CONTRAST IMAGING 有权
标题翻译：相位对比成像
公开(公告)号：US20120243658A1
公开(公告)日：2012-09-27
申请号：US13514682
申请日：2010-12-03
申请人： Dieter Geller , Klaus Juergen Engel , Gereon Vogtmeier , Thomas Koehler , Ewald Roessl
发明人： Dieter Geller , Klaus Juergen Engel , Gereon Vogtmeier , Thomas Koehler , Ewald Roessl
IPC分类号： G01N23/04
CPC分类号： A61B6/00 , A61B6/4291 , A61B6/4441 , A61B6/484
摘要： X-ray devices for Phase Contrast Imaging (PCI) are often built up with the help of gratings. For large field-of-views (FOV), production cost and complexity of these gratings could increase significantly as they need to have a focused geometry. Instead of a pure PCI with a large FOV, this invention suggests to combine a traditional absorption X-ray-imaging system with large-FOV with an insertable low-cost PCI system with small-FOV, The invention supports the user to direct the PCI system with reduced FOV to a region that he regards as most interesting for performing a PCI scan thus eliminating X-ray dose exposure for scanning regions not interesting for a radiologist. The PCI scan may be generated on the basis of local tomography.
摘要翻译：用于相位对比成像（PCI）的X射线装置通常在光栅的帮助下构建。对于大视野（FOV）来说，这些光栅的生产成本和复杂性可能会因为需要聚焦几何而显着增加。本发明不是采用具有大FOV的纯PCI，而是将传统的吸收X射线成像系统与大型FOV结合，并具有小FOV的可插入低成本PCI系统。本发明支持用户指导PCI 系统将FOV降低到他认为对于执行PCI扫描最有趣的区域，从而消除了用于放射科医生不感兴趣的扫描区域的X射线剂量曝光。可以基于局部断层摄影产生PCI扫描。

7. 发明申请

US20120057676A1 GRATING FOR PHASE-CONTRAST IMAGING 有权
标题翻译：用于相位对比成像的图像
公开(公告)号：US20120057676A1
公开(公告)日：2012-03-08
申请号：US13266692
申请日：2010-05-17
申请人： Thomas Koehler , Ewald Roessl
发明人： Thomas Koehler , Ewald Roessl
IPC分类号： G21K1/06
CPC分类号： G21K1/06 , G21K2207/005
摘要： The invention relates to gratings for X-ray differential phase-contrast imaging, a focus detector arrangement and X-ray system for generating phase-contrast images of an object and a method of phase-contrast imaging for examining an object of interest. In order to provide gratings with a high aspect ratio but low costs, a grating for X-ray differential phase-contrast imaging is proposed, comprising a first sub-grating (112), and at least a second sub- grating (114; 116; 118), wherein the sub-gratings each comprise a body structure (120) with bars (122) and gaps (124) being arranged periodically with a pitch (a), wherein the sub-gratings (112; 114; 116; 118) are arranged consecutively in the direction of the X-ray beam, and wherein the sub-gratings (112; 114; 116; 118) are positioned displaced to each other perpendicularly to the X-ray beam.
摘要翻译：本发明涉及用于X射线差分相位对比成像的光栅，用于产生对象的相位对比图像的焦点检测器布置和X射线系统以及用于检查感兴趣对象的相位对比成像方法。为了提供具有高纵横比但成本较低的光栅，提出了一种用于X射线差分相位对比成像的光栅，包括第一子光栅（112）和至少第二子光栅（114; 116 ; 118），其中所述子光栅各自包括具有杆（122）和间隙（124）的主体结构（120），所述杆具有间距（a）周期性地布置，其中所述子光栅（112; 114; 116; 118 ）沿X射线束的方向连续布置，并且其中子光栅（112; 114; 116; 118）被定位成垂直于X射线束彼此位移。

8. 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）。

9. 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.

10. 发明授权

US09168013B2 Breast density assessment 有权
标题翻译：乳房密度评估
公开(公告)号：US09168013B2
公开(公告)日：2015-10-27
申请号：US13991923
申请日：2011-12-08
申请人： Ewald Roessl , Hanns-Ingo Maack , Klaus Erhard
发明人： Ewald Roessl , Hanns-Ingo Maack , Klaus Erhard
IPC分类号： A61B6/00
CPC分类号： A61B6/502 , A61B6/00 , A61B6/482 , A61B6/488 , A61B6/542
摘要： The present invention relates to mammography. To provide breast density assessment with improved accuracy in the results, a method (100) is proposed for providing mammography information about an object of interest, the region of interest comprising a tissue structure, with the following steps: a) acquiring (110) first image data (112) with first image acquisition parameters (114), wherein the first image parameters are adapted to a first radiation spectrum of a dual energy mode; and wherein the first image acquisition is performed with a low X-ray dosage of a pre-scan; b) acquiring (116) second image data (118) with second image acquisition parameters (120), wherein the second image parameters are adapted to a second radiation spectrum of the dual energy mode, and wherein the second image acquisition is performed with a higher X-ray dosage than the first image acquisition, and wherein the second image acquisition is a Mammography scan; c) performing (122) a dual energy basis material decomposition (124) based on the first and second image data to generate decomposed basis material image data (126); and d) deriving (128) a density information (130) of the tissue structure of the region of interest from the decomposed basis material image data; and providing (132) the density information to a user.
摘要翻译：本发明涉及乳房X线照相术。为了提供结果的准确性提高乳房密度评估，提出了一种方法（100），用于提供关于感兴趣对象的乳房X射线摄影信息，所述感兴趣区域包括组织结构，其具有以下步骤：a）首先获取（110）具有第一图像采集参数（114）的图像数据（112），其中所述第一图像参数适于双能量模式的第一辐射光谱; 并且其中以预扫描的低X射线剂量执行所述第一图像采集; b）利用第二图像获取参数（120）获取（116）第二图像数据（118），其中所述第二图像参数适于所述双能量模式的第二辐射光谱，并且其中所述第二图像采集具有较高的 X射线剂量比第一图像采集，并且其中第二图像采集是乳房X线照相术扫描; c）基于第一和第二图像数据执行（122）双能量基础材料分解（124）以产生分解的基础材料图像数据（126）; 以及d）从所分解的基础材料图像数据中导出（128）所述感兴趣区域的组织结构的密度信息（130）; 以及向用户提供（132）密度信息。

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