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21. 发明授权

US09839407B2 Correction in slit-scanning phase contrast imaging 有权
公开(公告)号：US09839407B2
公开(公告)日：2017-12-12
申请号：US14896783
申请日：2014-06-27
申请人： KONINKLIJKE PHILIPS N.V.
发明人： Ewald Roessl , Gerhard Martens
IPC分类号： A61B6/03 , A61B6/00 , G01N23/20 , G21K1/06 , G21K1/10 , G02B5/18
CPC分类号： A61B6/582 , A61B6/484 , A61B6/5258 , A61B6/583 , G01N23/20075 , G01N2223/303 , G02B5/1838 , G21K1/06 , G21K1/10 , G21K2207/005
摘要： The present invention relates to calibration in X-ray phase contrast imaging. In order to remove the disturbance due to individual gain factors, a calibration filter grating (10) for a slit-scanning X-ray phase contrast imaging arrangement is provided that comprises a first plurality of filter segments (11) comprising a filter material (12) and a second plurality of opening segments (13). The filter segments and the opening segments are arranged alternating as a filter pattern (15). The filter material is made from a material with structural elements (14) comprising structural parameters in the micrometer region. The filter grating is movably arranged between an X-ray source grating (54) and an analyzer grating (60) of an interferometer unit in a slit-scanning system of a phase contrast imaging arrangement. The slit-scanning system is provided with a pre-collimator (55) comprising a plurality of bars (57) and slits (59). The filter pattern is aligned with the pre-collimator pattern (61).

22. 发明授权

US09761021B2 Dark field computed tomography imaging 有权
公开(公告)号：US09761021B2
公开(公告)日：2017-09-12
申请号：US14397878
申请日：2013-05-13
申请人： KONINKLIJKE PHILIPS N.V.
发明人： Thomas Koehler , Bernhard Johannes Brendel , Ewald Roessl , Udo van Stevendaal
IPC分类号： G06T11/00 , G01T1/29 , G01N23/20 , G01N23/201 , A61B6/00 , G01N21/88 , G01N23/04
CPC分类号： G06T11/005 , A61B6/42 , A61B6/48 , G01N23/046 , G01N23/20083 , G01N23/201 , G01N2021/8822 , G01N2021/8825 , G01N2223/054 , G01T1/2907 , G06T11/006 , G06T2207/10081
摘要： A method includes obtaining a dark-field signal generated from a dark-field CT scan of an object, wherein the dark-field CT scan is at least a 360 degree scan. The method further includes weighting the dark-field signal. The method further includes performing a cone beam reconstruction of the weighted dark-field signal over the 360 degree scan, thereby generating volumetric image data. For an axial cone-beam CT scan, in one non-limiting instance, the cone-beam reconstruction is a full scan FDK cone beam reconstruction. For a helical cone-beam CT scan, in one non-limiting instance, the dark-field signal is rebinned to wedge geometry and the cone-beam reconstruction is a full scan aperture weighted wedge reconstruction. For a helical cone-beam CT scan, in another non-limiting instance, the dark-field signal is rebinned to wedge geometry and the cone-beam reconstruction is a full scan angular weighted wedge reconstruction.

23. 发明申请

US20150110346A1 SPECTRAL IMAGING BASED DECISION SUPPORT, TREATMENT PLANNING AND/OR INTERVENTION GUIDANCE 有权
标题翻译：基于光谱成像的决策支持，治疗计划和/或干预指导
公开(公告)号：US20150110346A1
公开(公告)日：2015-04-23
申请号：US14402121
申请日：2013-05-31
申请人： KONINKLIJKE PHILIPS N.V.
发明人： Carsten Oliver Schirra , Ewald Roessl , Roland Proksa
IPC分类号： A61B19/00 , G06T11/00 , G06T7/00
CPC分类号： A61B34/10 , A61B6/032 , A61B6/4042 , A61B6/405 , A61B6/4241 , A61B6/481 , A61B6/488 , A61B6/504 , A61B6/507 , A61B6/5217 , A61B6/5235 , A61B2034/107 , F04C2270/041 , G06T7/0012 , G06T11/005 , G06T2207/10081 , G06T2207/30101 , G06T2211/404
摘要： A method includes obtaining first spectral image data, which includes at least a first component corresponding to a targeted first K-edge based contrast agent administered to a subject if a target of the targeted first K-edge based contrast agent is present in the subject, decomposing the first spectral image data into at least the first component, reconstructing the first component thereby generating a first image of the targeted first K-edge contrast agent, determining if the targeted first K-edge contrast agent is present in the first image, and generating a signal indicating the targeted first K-edge contrast agent is present in the first image in response to determining the targeted first K-edge contrast agent is present in the first image.
摘要翻译：一种方法包括获取第一光谱图像数据，该第一光谱图像数据包括至少一个第一组分，所述第一组分对应于被施用于对象的目标第一K边缘造影剂，如果所述目标第一K边缘基础造影剂的目标存在于所述对象中，将第一光谱图像数据分解成至少第一分量，重构第一分量，从而生成目标第一K边缘造影剂的第一图像，确定目标第一K边缘造影剂是否存在于第一图像中，以及响应于确定目标的第一K边缘造影剂存在于第一图像中，产生指示目标的第一K边缘造影剂的信号存在于第一图像中。

24. 发明授权

US11448781B2 Photon counting detector 有权
公开(公告)号：US11448781B2
公开(公告)日：2022-09-20
申请号：US17263916
申请日：2019-08-01
申请人： KONINKLIJKE PHILIPS N.V.
发明人： Roger Steadman Booker , Ewald Roessl
IPC分类号： G01T1/24 , G01T1/29
摘要： The present invention relates to a photon counting detector comprising a first direct conversion layer (10) comprising a low-absorption direct conversion material (11) for converting impinging high-energy electromagnetic radiation (100) into a first count signal and first electrical contacts (12), a second direct conversion layer (20) comprising a high-absorption direct conversion material (21) for converting impinging high-energy electromagnetic radiation (100) into a second count signal and second electrical contacts (22), said high-absorption direct conversion material having a higher absorption than said low-absorption direct conversion material, and a carrier layer (30, 30a, 30b) comprising first and second terminals (31, 32) in contact with the first and second electrical contacts and processing circuitry (35) configured to correct, based on the first count signal, the second count signal for errors, wherein said first direct conversion layer and the second direct conversion layer are arranged such that the high-energy electromagnetic radiation transmits the first direct conversion layer before it hits the second direct conversion layer.

25. 发明授权

US11232881B2 Anti-scatter grid assembly for detector arrangement 有权
公开(公告)号：US11232881B2
公开(公告)日：2022-01-25
申请号：US16463150
申请日：2017-11-22
申请人： KONINKLIJKE PHILIPS N.V.
发明人： Axel Thran , Heiner Daerr , Ewald Roessl , Gereon Vogtmeier
IPC分类号： G01T1/16 , G21K1/02
摘要： The present invention relates to an anti-scatter grid (ASG) assembly comprising a first and a second grid, wherein the second grid is arranged on top of the first grid and comprises a lateral shift. The lamella thickness of the first grid is smaller than the lamella thickness of the second grid. The present invention further relates to a detector arrangement comprising a pixel detector and an ASG assembly arranged on top of the pixel detector.

26. 发明授权

US11178346B2 Charge sharing calibration method and system 有权
公开(公告)号：US11178346B2
公开(公告)日：2021-11-16
申请号：US16960787
申请日：2019-01-08
申请人： KONINKLIJKE PHILIPS N.V.
发明人： Roger Steadman Booker , Ewald Roessl
IPC分类号： H04N5/32 , A61B6/00 , G01N23/046
摘要： A signal processing system (SPS) and related method. The system comprises an input interface (IN) for receiving at least two data sets, comprising a first data set and second data set. The first data set is generated by an X-ray detector sub-system (XDS) at a first pixel size and the second data set generated at a second pixel size different from the first pixel size. An estimator (EST) is configured to compute, based on the two data sets, an estimate of a charge sharing impact.

27. 发明授权

US11029425B2 Photon-counting in a spectral radiation detector 有权
公开(公告)号：US11029425B2
公开(公告)日：2021-06-08
申请号：US16305425
申请日：2017-06-16
申请人： KONINKLIJKE PHILIPS N.V.
发明人： Roger Steadman Booker , Ewald Roessl
IPC分类号： G01T1/24 , G01T1/17
摘要： The invention relates to radiation detector for registering incident photons, comprising (i) detection circuitry (202, 206, 207) configured to provide an electric output signal in response to incident photons, the output signal comprising pulses having an amplitude indicative of energies deposited in the radiation detector by the incident photons, and (ii) an energy estimating circuit (2081, . . . , 208N; 2091, . . . , 209N) configured to detect that the output signal is larger than at least one threshold corresponding to an energy value in order to determine energies of incident photons. The radiation detector further comprises a registration circuit (211) configured to detect incident photons independent of a comparison of the output signal with the at least one threshold. Moreover, the invention relates to a method for detecting photons using the radiation detector.

28. 发明授权

US10929974B2 Determining calcium content from spectral CT data 有权
公开(公告)号：US10929974B2
公开(公告)日：2021-02-23
申请号：US16301477
申请日：2017-06-14
申请人： KONINKLIJKE PHILIPS N.V.
发明人： Dirk Schaefer , Heiner Daerr , Thomas Koehler , Ewald Roessl
IPC分类号： G06K9/00 , G06T7/00 , G16H30/40 , G06T11/00 , A61B5/02
摘要： Present invention relates to devices and methods for determining a calcium content by analyzing cardiac spectral CT data. CT projection data (9), obtainable by scanning a cardiac region of a subject using a spectral CT scanning unit, is modelled (12) by applying a material decomposition algorithm to the projection data to provide a calcium-specific component. Tomographic reconstructions (13) of the projection data, to provide a first 3D image (8), and of the calcium-specific component, to provide a second 3D image (6), are performed. The first 3D image (8) is segmented (14) to provide an image mask (5) corresponding to a cardiovascular structure of interest, a part of the second 3D image (6) is selected (15) based on the image mask (5), and a calcium content is calculated (16) in the cardiovascular structure of interest based on the selected part of the second 3D image (6).

29. 发明授权

US10627532B2 Dead-time calibration for a radiation detector 有权
公开(公告)号：US10627532B2
公开(公告)日：2020-04-21
申请号：US16300107
申请日：2017-06-07
申请人： KONINKLIJKE PHILIPS N.V.
发明人： Ewald Roessl , Roger Steadman Booker
IPC分类号： G01T1/17 , G01N23/04 , G01T1/24 , G01T7/00
CPC分类号： G01T1/171 , G01T1/247 , G01T7/005
摘要： The invention relates to a correction device (8) for a radiation detector (2) including detector elements each for detecting incident photons. The correction device (8) is configured to read detection signals representative of an incident photon flux detected by the detector elements for different incident photon fluxes, and an evaluation unit (11) configured to determine for each detector element a dead time of the detector element and a parameter representative of an effective area of the detector element on the basis of a collective evaluation of the detection signals of the respective detector element. Further, the correction device (8) is configured to determine for each detector element correction parameters to compensate for differences in the effective areas and in the dead times of the detector elements on the basis of the determined parameters representative of the effective area and the determined dead times of the detector elements.

30. 发明授权

US10458926B2 Calibration hardware phantom for differential phase contrast imaging 有权
公开(公告)号：US10458926B2
公开(公告)日：2019-10-29
申请号：US15311886
申请日：2015-05-18
申请人： KONINKLIJKE PHILIPS N.V.
发明人： Udo Van Stevendaal , Heiner Daerr , Thomas Koehler , Gerhard Martens , Ewald Roessl
IPC分类号： G01N23/00 , G01N23/04 , A61B6/00 , G01N23/041
摘要： A phantom body (PB) for use in a differential phase contrast imaging apparatus (IM) for calibration of same. The phantom body (PB) allows for simultaneous calibration of three different image signal channels, namely refraction, phase shift and small angle scattering.

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