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41.发明申请公开(公告)号：US20140328466A1
公开(公告)日：2014-11-06
申请号：US14362458
申请日：2012-12-13
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： Roland Proksa , Ewald Roessl
CPC classification number: 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
Abstract: 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.
Abstract translation: 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。
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公开(公告)号：US11253209B2
公开(公告)日：2022-02-22
申请号：US14354191
申请日：2012-11-01
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： Robert Manzke , Roland Proksa , Anne Morawski Neubauer , Carsten Oliver Schirra
Abstract: An analyzer (124) includes a quantifier (204) configured to quantify an amount of contrast material representing scar tissue created by ablation for tissue of interest in contrast enhanced imaging data and a recommender (210) configured to generate a signal indicative of a recommendation to further ablate the tissue of interest in response to the quantified amount of the contrast material not satisfying a pre-determined threshold. A method includes obtaining contrast enhanced image data indicative of scar tissue created by ablation of tissue of interest, quantifying an amount of contrast material for the scar tissue in the tissue of interest, and generating a signal indicative of a recommendation to further ablate the tissue of interest in response to the quantified amount of the contrast material not satisfying a pre-determined threshold.
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43.发明授权公开(公告)号：US11156725B2
公开(公告)日：2021-10-26
申请号：US16498532
申请日：2018-03-27
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： Roland Proksa
IPC: G01T1/20 , G21K1/06 , G21K1/16 , G01N23/041 , G21K4/00
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 focusing 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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44.发明授权公开(公告)号：US11026643B2
公开(公告)日：2021-06-08
申请号：US16463857
申请日：2017-11-30
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： Roland Proksa , Thomas Koehler
Abstract: An interferometer grating support (118) of an imaging system (100) configured for grating-based x-ray imaging includes at least two elongate supports (302) separated from each other by a non-zero distance, wherein the at least two elongate supports have a first end (312) and a second end (316). The grating support further includes a first arc shaped grating (202) affixed to the first end and a second arc shaped grating (204) affixed to a second end (316). A non-transitory computer readable medium is configured with computer executable instructions which when executed by a processor of a computer cause the processor to: move a grating support, which supports G0 and G1 gratings of an interferometer and a bowtie filter, into a region between a low energy photon filter and a beam collimator, which are between a radiation source and an examination region, for a grating-based x-ray imaging scan.
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公开(公告)号：US10980506B2
公开(公告)日：2021-04-20
申请号：US16305529
申请日：2017-06-29
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： Ewald Roessl , Roger Steadman , Christoph Herrmann , Roland Proksa
IPC: A61B6/00 , G01N23/046 , G01N23/083 , G06T11/00
Abstract: An image signal processing system (ISP) comprising an input interface (IN) for receiving photon counting projection data acquired by an X-ray imaging apparatus (IA) having a photon counting detector (D). A calibration data memory (CMEM) of the system holds calibration data. The calibration data encodes photon counting data versus path lengths curves for different energy thresholds of i) said detector (D) or ii) of a different detector. At least one of said curves is not one-to-one. A path length convertor (PLC) of the system converts an entry in said photon counting projection data into an associated path length based on said calibration data.
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Patent Agency Ranking
公开(公告)号：US10667769B2
公开(公告)日：2020-06-02
申请号：US15770773
申请日：2016-11-01
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： Roland Proksa , Heiner Daerr , Daniela Muenzel , Peter Noel
Abstract: The invention relates to a method of Computed Tomography imaging comprising: a. Performing a single acquisition of image data from at least two contrast agents into a blood vessel network, a first contrast agent among said at least two contrast agents having been in said blood vessel network for a longer time than a second contrast agent among said at least two contrast agents, b. Processing said image data using K-Edge detection and/or iodine delineation to separate data associated with each contrast agents in order to obtain a concentration map of each contrast agent, c. Determining from said image data a first part of the blood vessel network comprising both the first contrast agent and the second contrast agent, and a second part of the blood vessel network comprising only the first contrast agent, d. Calculating a partial blood volume map of the first part of the blood vessel network based on the total amount of second contrast agent and on the concentration map of the second contrast agent, e. Calculating a partial blood volume map of the second part of the blood vessel network based on the total amount of first contrast agent, on the concentration map of the first contrast agent and on the partial blood volume map of the first part of the blood vessel network.
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公开(公告)号：US10575391B2
公开(公告)日：2020-02-25
申请号：US15779105
申请日：2016-11-18
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： Roland Proksa , Rolf Karl Otto Behling , Carolina Ribbing , Lester Donald Miller , Alexander Eitel
Abstract: The present invention relates to a device (34) and a method (70) for determining a status of an X-ray tube (10) of an X-ray system (36). Due to ageing and/or wear of the X-ray tube, the spectrum of the X-ray radiation (30) provided by the X-ray tube may change over the operation time of the X-ray tube. The present invention therefore suggests evaluating spectrally different values detected with an X-ray detector arrangement (32) of the X-ray system. A reference data set representing a reference condition of the X-ray tube by a plurality of spectrally different reference-values (44) and a working data set representing an aged condition of the X-ray tube by a plurality of spectrally different working-values (46) of detected X-ray radiation are used to determine an equivalent filtration function for an filtration material influencing a source X-ray radiation (26) emitted by an anode (16) of the X-ray tube. Accordingly, the filtration function provides the information about the material being used for the filtration and/or its length, which may provide the basis to determine the condition and thus the status of the X-ray tube.
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公开(公告)号：US10426417B2
公开(公告)日：2019-10-01
申请号：US15301513
申请日：2015-06-03
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： Michael Grass , Thomas Koehler , Roland Proksa
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.
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公开(公告)号：US10368819B2
公开(公告)日：2019-08-06
申请号：US15326509
申请日：2015-07-13
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： Michael Grass , Roland Proksa
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.
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公开(公告)号：US10107921B1
公开(公告)日：2018-10-23
申请号：US15769368
申请日：2017-09-05
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： Roland Proksa
CPC classification number: G01T1/2006 , G01T1/15 , G01T1/175 , H04N5/32 , H04N5/3597 , H04N5/37455 , H04N5/378
Abstract: A radiation detector (100) with a scintillator (102), a photosensor (104) and an electronics module (108) is proposed. The electronics module (108) has a current-to-frequency converter (110) with a charge integrator (112) for generating a pulsed signal in having a frequency correlating with a charge generated by the photosensor (104) during a measurement cycle. The electronics module (108) further comprises a current source (120) for generating a frequency offset of the pulsed signal, an interrupting device (134) for interrupting an integration of the charge by the charge integrator (112), and a logic module (124) for determining the frequency of the pulsed signal. Therein, the logic module (124) is configured for determining an off-state of a radiation (404) source and for triggering the interrupting device (134) upon determining the off-state of the radiation source (404).
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