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公开(公告)号：WO2020070023A1
公开(公告)日：2020-04-09
申请号：PCT/EP2019/076287
申请日：2019-09-27
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： GRASS, Michael , PROKSA, Roland
IPC: A61B6/02 , A61B6/00 , G01N23/046 , G06T11/00 , H05G1/58
Abstract: The invention refers to a system for providing a spectral image using a conventional CT system. The system comprises a data providing unit (11) for providing first projection data and second projection data, wherein the first and second projection data have been acquired using different acquisition spectra, wherein the first projection data has been acquired during a scout scan and the second projection data has been acquired during a diagnostic scan, or wherein the first and second projection data have been acquired by a first and second part of the detector, respectively. The first and second part of the detector acquire projection data with different acquisition spectra. A spectral image generation unit (12) generates a spectral image based on the projection data. With this system a spectral image can be provided using a conventional CT system with a decreased acquisition time.
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公开(公告)号：WO2018202675A1
公开(公告)日：2018-11-08
申请号：PCT/EP2018/061135
申请日：2018-05-02
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： DAERR, Heiner , PROKSA, Roland , BERGNER, Frank
Abstract: The present invention relates to a photon scanning apparatus comprising a photon source (2) to emit a photon beam (4), a photon detector (6) to detect photons emitted from the photon source (2). The photon source (2) is adapted to emit the photon beam (4) in accordance with a predetermined pulse width modulation scheme at a predetermined flux rate, wherein the pulse width modulation scheme defines pulse widths of the photon beam (4) for respective positions of the photon source (2) and the photon detector around a central axis (R) and an object to be scanned. The photon detector (6) is adapted to start detecting photons with a delay relative to the photon source starting to emit photons and to finish detecting photons prior to the photon source stopping to emit photons. The photon scanning apparatus thus only has to be calibrated for the predetermined flux rate.
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3.发明申请
公开(公告)号：WO2018178107A1
公开(公告)日：2018-10-04
申请号：PCT/EP2018/057828
申请日：2018-03-27
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： PROKSA, Roland
Abstract: The present invention relates to a detector arrangement for an X-ray phase contrast system (5), the detector arrangement (1) comprising: a scintillator (11); an optical grating (12); and a detector (13); wherein the optical grating (12) is arranged between the scintillator (11) and the detector (13); wherein the scintillator (11) converts X-ray radiation (2) into optical radiation (3); wherein the optical grating (12) is configured to be an analyzer grating being adapted to a phase-grating (21) of an X-ray phase contrast system (5); wherein the optical path between the optical grating (12) and the scintillator (11) is free of focussing elements for optical radiation. The present invention further relates to a method (100) for performing X-ray phase contrast imaging with a detector arrangement (1) mentioned above. The invention avoids the use of an X-ray absorption grating as G2 grating in an X-ray phase contrast interferometer system.
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公开(公告)号：WO2018046414A1
公开(公告)日：2018-03-15
申请号：PCT/EP2017/072039
申请日：2017-09-04
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： BRENDEL, Bernhard Johannes , KOEHLER, Thomas , PROKSA, Roland
Abstract: The present invention relates to computer tomography X-ray imaging. In order to provide further improved data for the reconstruction, a system (10) for computer tomography X-ray imaging is provided. The system comprises a data interface (12) and a processing unit (14). The data interface is configured to provide at least first and second CT X-ray radiation projection data for at least a first and second X-ray energy range, which ranges are different from each other. The processing unit is configured to determine a correction for slice normalization, and to apply an equal slice normalization for the first and the second CT X-ray projection data and thereby generating prepared first and second CT X-ray projection data. For the correction, the equal slice normalization is based on measured data of outer detector elements. Further, the data interface is configured to provide the prepared first and second CT X-ray projection data for further processing. In an example, the system further comprises a computer tomography X-ray imaging acquisition arrangement (20) with an X-ray source (22) configured to generate an X-ray beam, and an X-ray detector (26) configured as an energy discriminating X-ray detector to simultaneously provide X-ray radiation projection data for at least two different X-ray energy ranges separately. The computer tomography X-ray imaging acquisition arrangement is configured to acquire at least the first and second CT X-ray projection data of a region of interest of an object for the at least first and second X-ray energy range.
Abstract translation: 计算机断层摄影X射线成像技术领域本发明涉及计算机断层摄影X射线成像。 为了提供用于重建的进一步改进的数据，提供了用于计算机断层摄影X射线成像的系统（10）。 该系统包括数据接口（12）和处理单元（14）。 数据接口被配置为提供用于至少第一和第二X射线能量范围的至少第一和第二CT X射线辐射投影数据，该范围彼此不同。 处理单元被配置为确定用于切片归一化的校正，并且对第一和第二CT X射线投影数据应用等切片归一化，并由此生成准备好的第一和第二CT X射线投影数据。 为了校正，等片归一化基于外部探测器元件的测量数据。 此外，数据接口被配置为提供准备好的第一和第二CT X射线投影数据以供进一步处理。 在一个示例中，该系统进一步包括具有被配置为生成X射线束的X射线源（22）的计算机断层摄影X射线成像获取布置（20），以及被配置为X射线探测器（26）的X射线探测器 能量鉴别X射线探测器，以同时分别为至少两个不同的X射线能量范围提供X射线辐射投影数据。 计算机断层摄影X射线成像获取装置被配置为获取至少第一和第二X射线能量范围的物体的感兴趣区域的至少第一和第二CT X射线投影数据。
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公开(公告)号：WO2018046377A1
公开(公告)日：2018-03-15
申请号：PCT/EP2017/071806
申请日：2017-08-30
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： JANSSEN, Thomas , PROKSA, Roland
Abstract: A source grating structure (G0) for interferometric X-ray imaging cable of generating a non-uniform intensity profile behind a surface (S) of the grating structure when exposed to X-ray radiation.
Abstract translation: 用于干涉X射线成像电缆的源光栅结构（G0），其在暴露于X射线辐射时在光栅结构的表面（S）后面产生非均匀强度分布。 p>
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Patent Agency Ranking6.发明申请ITERATIVE IMAGE RECONSTRUCTION WITH A SHARPNESS DRIVEN REGULARIZATION PARAMETER 审中-公开带锐度驱动正则化参数的迭代图像重建
公开(公告)号：WO2016042466A2
公开(公告)日：2016-03-24
申请号：PCT/IB2015/057072
申请日：2015-09-15
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： KOEHLER, Thomas , PROKSA, Roland , GRASS, Michael
IPC: G06T11/00
CPC classification number: G06T11/008 , A61B6/032 , A61B6/5235 , A61B6/5282 , G06K9/6215 , G06T5/50 , G06T7/0012 , G06T11/006 , G06T11/60 , G06T2207/10081 , G06T2207/30004 , G06T2211/408 , G06T2211/424
Abstract: A method includes performing a first pass of an iterative image reconstruction in which an intermediate first spectral image and an intermediate second spectral image are generated using an iterative image reconstruction algorithm, start first spectral and second spectral images, and initial first spectral regularization and second spectral regularization parameters, updating at least one of the initial first spectral regularization or second spectral regularization parameters, thereby creating an updated first spectral regularization or second spectral regularization parameter, based at least on a sharpness of one of the intermediate first spectral or second spectral images, and performing a subsequent pass of the iterative image reconstruction in which an updated intermediate first spectral and second spectral image is generated using the iterative image reconstruction algorithm, the intermediate first spectral and second spectral images, and the updated first spectral regularization and Compton scatter regularization parameters.
Abstract translation: 一种方法包括执行迭代图像重建的第一遍，其中使用迭代图像重建算法生成中间第一光谱图像和中间第二光谱图像，开始第一光谱图像和第二光谱图像， 以及初始第一光谱正则化和第二光谱正则化参数，更新初始第一光谱正则化或第二光谱正则化参数中的至少一个，由此至少基于所述第一光谱正则化或第二光谱正则化参数之一的锐度来创建更新的第一光谱正则化或第二光谱正则化参数 中间的第一光谱或第二光谱图像，并且执行迭代图像重建的后续通过，其中使用迭代图像重建算法，中间的第一光谱图像和第二光谱图像以及更新的中间的第一光谱和第二光谱图像来生成更新的中间第一光谱和第二光谱图像 第一光谱 正则化和康普顿散射正则化参数。
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公开(公告)号：WO2016038179A1
公开(公告)日：2016-03-17
申请号：PCT/EP2015/070807
申请日：2015-09-11
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： KOEHLER, Thomas , GRASS, Michael , PROKSA, Roland
CPC classification number: A61B6/022 , A61B6/035 , A61B6/0407 , A61B6/4007 , A61B6/4014 , A61B6/405 , A61B6/481 , A61B6/486 , A61B6/504
Abstract: The present invention relates to a stereo tube radiation imaging system in which radiation emitted from each radiation source covers a different area of the detector surface. Furthermore, the present invention relates to a stereo tube imaging method wherein both radiation sources are operated independently and each cover part of the detector surface area. This is advantageous in that it may reduce radiation dose compared to known stereo tube imaging and introduces new possibilities for stereo tube imaging, such as improved object tracking within a body.
Abstract translation: 本发明涉及立体管辐射成像系统，其中从每个辐射源发射的辐射覆盖检测器表面的不同区域。 此外，本发明涉及一种立体管成像方法，其中两个辐射源独立地操作，并且检测器表面区域的每一个盖部分都是操作的。 这是有利的，因为它可以降低与已知立体管成像相比的辐射剂量，并且引入立体管成像的新可能性，例如在体内改善的对象跟踪。
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公开(公告)号：WO2016008837A1
公开(公告)日：2016-01-21
申请号：PCT/EP2015/065950
申请日：2015-07-13
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： GRASS, Michael , PROKSA, Roland
IPC: A61B6/00
CPC classification number: A61B6/5217 , A61B6/032 , A61B6/481 , A61B6/487 , A61B6/504 , G06F19/00 , G06T7/0012 , G06T2207/10081 , G06T2207/10116 , G06T2207/30101 , G16H50/50
Abstract: The present invention relates to improved assessment of a stenosis in a blood vessel in a body by comparing hemodynamic properties of the stenosed blood vessel with a substantially symmetric different blood vessel in the same body.
Abstract translation: 本发明涉及通过将狭窄的血管的血流动力学特性与同一体内基本对称的不同血管进行比较来改善对体内血管狭窄的评估。
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公开(公告)号：WO2015193761A1
公开(公告)日：2015-12-23
申请号：PCT/IB2015/054187
申请日：2015-06-03
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： GRASS, Michael , KOEHLER, Thomas , PROKSA, Roland
IPC: A61B6/00
CPC classification number: A61B6/484 , A61B6/032 , A61B6/4014 , A61B6/42 , A61B6/4241 , A61B6/4291 , A61B6/5205 , G06T2207/10081
Abstract: An imaging system (200) includes a radiation source (208) that emits radiation that traverses an examination region. The imaging system further includes a hybrid data acquisition system (212) that receives radiation that traverses the examination region. The hybrid data acquisition system includes a phase-contrast sub-portion (304) spanning a sub- portion of a full field of view. The hybrid data acquisition system further includes at least one of an integrating portion (302, 702, 804, 806, 902) or a spectral portion (402, 704, 706, 802, 1002) spanning the full field of view. The hybrid data acquisition system generates a phase-contrast signal and at least one of an integration signal or a spectral signal. The imaging system further includes a reconstructor (216) that reconstructs the phase-contrast signal and at least one of the integration single or the spectral signal to generate volumetric image data indicative of the examination region.
Abstract translation: 成像系统（200）包括发射穿过检查区域的辐射的辐射源（208）。 成像系统还包括接收穿过检查区域的辐射的混合数据采集系统（212）。 混合数据采集系统包括跨越整个视野的子部分的相位对比度子部分（304）。 混合数据采集系统还包括跨越整个视野的积分部分（302,702,804,806,902）或光谱部分（402,704,702,802,1002）中的至少一个。 混合数据采集系统产生相位对比度信号和积分信号或频谱信号中的至少一个。 成像系统还包括重建器（216），其重构相位对比度信号和积分单个或频谱信号中的至少一个以产生指示检查区域的体积图像数据。
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公开(公告)号：WO2014001975A2
公开(公告)日：2014-01-03
申请号：PCT/IB2013/055060
申请日：2013-06-20
Applicant: KONINKLIJKE PHILIPS N.V. , PHILIPS DEUTSCHLAND GMBH
Inventor： PROKSA, Roland
CPC classification number: A61B6/484 , A61B6/032 , A61B6/035 , A61B6/0457 , A61B6/4035 , A61B6/4266 , A61B6/4291 , A61B6/4417 , A61B6/4435 , A61B6/502 , A61B6/504 , A61B6/5205 , A61B6/54
Abstract: An imaging system (200) is configured for grating-based DPCI. The imaging system includes a rotating gantry (204) that rotates around an examination region, a radiation source (208), supported by the rotating gantry, that emits radiation that traverses the examination region, a detector array (212), supported by the rotating gantry, that detects radiation that traverses the examination region, and an interferometer, supported by the rotating gantry, which includes a source grating (214), a phase grating (218), and an absorber grating (220). At least one of the phase grating or the absorber grating continuously translates with respect to the other during an integration period and the detector generates and outputs an electrical signal indicative of the detected radiation, wherein the electrical signal includes an absorption component, a coherence component and a phase component.
Abstract translation: 成像系统（200）被配置用于基于光栅的DPCI。 成像系统包括围绕检查区域旋转的旋转机架（204），由旋转机架支撑的辐射源（208），其发射穿过检查区域的辐射;检测器阵列（212），由旋转 检测穿过检查区域的辐射的台架以及由旋转机架支撑的干涉仪，其包括源光栅（214），相位光栅（218）和吸收光栅（220）。 所述相位光栅或所述吸收光栅中的至少一个在积分周期期间相对于另一个相继连续平移，并且所述检测器产生并输出指示所述检测到的辐射的电信号，其中所述电信号包括吸收分量，相干分量和 相位分量。
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