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51. 发明授权

US09349494B2 X-ray beam shaper 有权
标题翻译： X光束整形机
公开(公告)号：US09349494B2
公开(公告)日：2016-05-24
申请号：US14381234
申请日：2013-02-06
申请人： KONINKLIJKE PHILIPS N.V.
发明人： Ewald Roessl
IPC分类号： G01N23/04 , G21K1/02 , A61B6/03 , A61B6/06 , A61B6/00
CPC分类号： G21K1/02 , A61B6/032 , A61B6/06 , A61B6/4021 , A61B6/4035 , G01N23/04
摘要： An imaging system (500) includes a focal spot (508) that rotates along a path around an examination region and emits a radiation beam that traverses a field of view of the examination region and a subject or object therein. The system further includes a detector array (520) that is located opposite the radiation source, across the examination region. The detector array detects radiation traversing the field of view and outputs a signal indicative of the detected radiation. The system further includes a beam shaper that is located between the radiation source and the examination region. The beam shaper rotates with the focal spot and, relative to the focal spot, in an opposite direction of the focal spot with a same angular frequency as the rotating of the focal spot and attenuates the radiation beam which reduces a flux density across the detector array at each rotational angle of the focal spot.
摘要翻译：成像系统（500）包括焦点（508），其沿着检查区域周围的路径旋转并且发射穿过检查区域的视野的辐射束以及其中的被摄体或物体。该系统还包括跨越检查区域与辐射源相对定位的检测器阵列（520）。检测器阵列检测穿过视野的辐射，并输出指示检测到的辐射的信号。该系统还包括位于辐射源和检查区域之间的光束整形器。光束整形器与焦点一起旋转并且相对于焦斑以与焦点的旋转相同的角频率与焦点的相反方向旋转，并且衰减辐射束，从而降低了检测器阵列上的通量密度在焦斑的每个旋转角度。

52. 发明申请

US20150234059A1 PHOTON COUNTING X-RAY DETECTOR 有权
标题翻译：光电计数X射线探测器
公开(公告)号：US20150234059A1
公开(公告)日：2015-08-20
申请号：US14421303
申请日：2013-07-15
申请人： KONINKLIJKE PHILIPS N.V. , PHILIPS GMBH
发明人： Ewald Roessl , Daerr Heiner , Roger Steadman Booker
IPC分类号： G01T1/24 , G01N23/04
CPC分类号： G01T1/247 , G01N23/046 , G01T1/171 , G01T1/248
摘要： The invention relates to a method and an X-ray detector (100) for detecting incident X-ray photons (X). The X-ray detector (100) comprises at least one sensor unit (105) in which X-ray photons (X) are converted into sensor signals (s) and at least one flux sensor (104) for generating a flux signal (f) related to the flux of photons (X). The sensor signals (s) are corrected based on the flux signal (f). In a preferred embodiment, the sensor signals (s) represent a spectrally resolved pulse counting. The flux sensor (104) may be integrated into an ASIC (103) that is coupled to the sensor unit (105).
摘要翻译：本发明涉及一种用于检测入射的X射线光子（X）的方法和X射线检测器（100）。 X射线检测器（100）包括至少一个传感器单元（105），其中将X射线光子（X）转换成传感器信号和至少一个通量传感器（104），用于产生通量信号（f ）与光子（X）的通量有关。基于通量信号（f）校正传感器信号。在优选实施例中，传感器信号表示频谱分辨的脉冲计数。通量传感器（104）可以集成到耦合到传感器单元（105）的ASIC（103）中。

53. 发明申请

US20140328466A1 DETECTION APPARATUS FOR DETECTING PHOTONS TAKING PILE-UP EVENTS INTO ACCOUNT 有权
标题翻译：用于检测拍摄活动的照相机的检测装置
公开(公告)号：US20140328466A1
公开(公告)日：2014-11-06
申请号：US14362458
申请日：2012-12-13
申请人： KONINKLIJKE PHILIPS N.V.
发明人： Roland Proksa , Ewald Roessl
IPC分类号： G01T1/17 , G01N23/04
CPC分类号： A61B6/585 , A61B6/4241 , A61B6/5205 , A61B6/5258 , A61B6/582 , A61B2560/0223 , A61B2560/0238 , G01R29/0273 , G01R29/033 , G01R29/0878 , G01R29/24 , G01T1/171 , G01T1/18 , G06F7/64 , H01L27/14856 , H03K5/1252 , H03K5/2463 , H03K21/40
摘要： The invention relates to a detection apparatus (12) for detecting photons. The detection apparatus comprises a pile-up determining unit (15) for determining whether detection signal pulses being indicative of detected photons are caused by a pile-up event or by a non-pile-up event, wherein a detection values generating unit (16) generates detection values depending on the detection signal pulses and depending on the determination whether the respective detection signal pulse is caused by a pile-up event or by a non-pile-up event. In particular, the detection values generating unit can be adapted to reject the detection signal pulses caused by pile-up events while generating the detection values. This allows for an improved quality of the generated detection values.
摘要翻译：本发明涉及一种用于检测光子的检测装置（12）。检测装置包括：堆积确定单元，用于确定是否由堆积事件或非堆积事件引起检测到的光子的指示的检测信号脉冲，其中检测值生成单元（16））根据检测信号脉冲产生检测值，并且取决于各个检测信号脉冲是由堆积事件还是由非堆积事件引起的。特别地，检测值生成单元可以适于在产生检测值的同时拒绝由堆积事件引起的检测信号脉冲。这样可以提高产生的检测值的质量。

54. 发明授权

US11529112B2 X-ray imaging data processing device and method 有权
公开(公告)号：US11529112B2
公开(公告)日：2022-12-20
申请号：US16322509
申请日：2018-03-23
申请人： KONINKLIJKE PHILIPS N.V.
发明人： Mattias Bartels , Thomas Koehler , Ewald Roessl
IPC分类号： A61B6/00
摘要： Data in X-ray images of a medical device is processed in order to reduce vibration artifacts in differential phase contrast imaging. A proportionality factor between an object induced phase shift for a first x-ray energy bin and an object induced phase shift for a second x-ray energy bin is provided. At least one of a dark field signal and an object induced phase shift is determined from a detected intensity value of a pixel for the first energy bin and a detected intensity value of the pixel for the second energy bin using the proportionality factor.

55. 发明授权

US11096639B2 Projection data acquisition apparatus and subject support device 有权
公开(公告)号：US11096639B2
公开(公告)日：2021-08-24
申请号：US16466308
申请日：2017-12-07
申请人： KONINKLIJKE PHILIPS N.V.
发明人： Ewald Roessl , Thomas Koehler
IPC分类号： A61B6/00 , A61B6/03 , G21K1/06 , A61B6/04
摘要： The invention relates to a subject support device (1) to be used in a projection data acquisition apparatus (2) for acquiring projection data of a subject (3). The subject support device comprises a support component (4) providing a support surface (5) for supporting the subject while acquiring the projection data, a diffraction grating (6) for diffracting x-rays, and a moving unit (7, 8) for moving the support component and the diffraction grating relative to each other. This relative movement can allow for a movement of the support component such that the subject is moved through x-rays (16) for determining projection data of different parts of the subject, while the diffraction grating can still be traversed by the x-rays. These projection data can be used for generating a relatively large phase-contrast and/or dark-field projection image.

56. 发明授权

US10925556B2 Imaging with modulated X-ray radiation 有权
公开(公告)号：US10925556B2
公开(公告)日：2021-02-23
申请号：US15742645
申请日：2016-07-13
申请人： KONINKLIJKE PHILIPS N.V.
发明人： Ewald Roessl , Stewart Young
IPC分类号： A61B6/00 , G01N23/04 , A61B6/06
摘要： The present invention relates to a modulation of X-ray radiation for the purposes of imaging an object of interest. For the modulation, the X-ray radiation provided by an X-ray source (12) is in part totally reflected by a mirror (20). Thus, an X-ray radiation at an object receiving space (16) is formed by an unreflected X-ray radiation (24) and a reflected X-ray radiation (26). The mirror (20) is displaceable by an actuator (28), such that the intensity of the reflected X-ray radiation (26) can be adjusted, in particular to a density of the object to be imaged.

57. 发明授权

US10660589B2 Baseline shift determination for a photon detector 有权
公开(公告)号：US10660589B2
公开(公告)日：2020-05-26
申请号：US15534528
申请日：2015-12-10
申请人： KONINKLIJKE PHILIPS N.V.
发明人： Ewald Roessl
IPC分类号： A61B6/03 , G01T1/24 , A61B6/00 , G01T1/40 , G01T7/00 , H05G1/30
摘要： The present invention relates to determining baseline shift of an electrical signal generated by a photon detector (102) of an X-ray examination device (101). For this purpose, the photon detector comprises a processing unit (103) that is configured to determine a first crossing frequency of a first pulse height threshold by the electrical signal generated by the photon detector. The first pulse height threshold is located at a first edge of a noise peak in the pulse height spectrum of the electrical signal.

58. 发明授权

US10485492B2 Source-detector arrangement 有权
公开(公告)号：US10485492B2
公开(公告)日：2019-11-26
申请号：US15524112
申请日：2015-11-10
申请人： KONINKLIJKE PHILIPS N.V.
发明人： Thomas Koehler , Ewald Roessl , Rolf Karl Otto Behling , Peter Benjamin THeodor Noel , Franz Pfeiffer
IPC分类号： A61B6/03 , A61B6/00 , H01J35/14 , G02B5/18
CPC分类号： A61B6/032 , A61B6/4035 , A61B6/4085 , A61B6/484 , G02B5/1866 , H01J35/14 , G21K2207/005 , H01J2235/082 , H01J2235/086
摘要： The invention relates to a source-detector arrangement (11) of an X-ray apparatus (10) for grating based phase contrast computed tomography. The source-detector arrangement comprises an X-ray source (12) adapted for rotational movement around a rotation axis (R) relative to an object (140) and adapted for emittance of an X-ray beam of coherent or quasi-coherent radiation in a line pattern (21); and an X-ray detection system (16) including a first grating element (24) and a second grating element (26) and a detector element (6); wherein the line pattern of the radiation and a grating direction of the grating elements are arranged orthogonal to the rotation axis; and wherein the first grating element has a first grating pitch varied dependent on a cone angle (β) of the X-ray beam and/or the second grating element has a second grating pitch varied dependent on the cone angle of the X-ray beam.

59. 发明授权

US10365380B2 Photon counting device and method 有权
公开(公告)号：US10365380B2
公开(公告)日：2019-07-30
申请号：US15748750
申请日：2016-07-29
申请人： KONINKLIJKE PHILIPS N.V.
发明人： Roger Steadman Booker , Ewald Roessl
IPC分类号： G01T1/00 , G01T1/17 , G01T1/29 , G01T1/24 , H04N5/345 , G01J1/44
摘要： The invention relates a photon counting device and method for counting photon interactions in a piece of converter material and addressing the issue of charge sharing. The occurrence of a charge sharing event is already detected upon the onset of the pulse, taking into consideration an onset of a pulse in a neighboring pixel within a preferably very short coincidence window. According to the invention, it is detected whether a pulse is being processed and one or more neighboring pixels are scouted to decide whether a simultaneous interaction has been registered within a very short coincidence window.

60. 发明授权

US10314556B2 Optimal energy weighting of dark field signal in differential phase contrast X-ray imaging 有权
公开(公告)号：US10314556B2
公开(公告)日：2019-06-11
申请号：US15312693
申请日：2016-04-25
申请人： KONINKLIJKE PHILIPS N.V.
发明人： Thomas Koehler , Ewald Roessl , Gerhard Martens , Heiner Daerr
IPC分类号： A61B6/03 , A61B6/00 , G01N23/04 , G01N23/041
摘要： Apparatus and related method for dark-field imaging. The apparatus operates on projective intensities detected at a detector in different energy channels. An energy weighting is used to improve the signal to noise ratio. The model operates in a logarithmic domain.

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