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公开(公告)号：US12226245B2
公开(公告)日：2025-02-18
申请号：US18017143
申请日：2021-07-16
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： Klaus Alfred Erhard , Heiner Daerr , Artur Sossin , Axel Thran , Bernhard Johannes Brendel , Christian Haase , Claas Bontus
Abstract: A spectral X-ray imaging system (100) includes an X-ray source (110) and an X-ray detector (120) that are mounted to a support structure (150). The support structure (150) is configured to rotate the X-ray source (110) and the X-ray detector (120) around two or more orthogonal axes (A-A′, B-B′). One or more processors (130) are configured to cause the system (100) to perform operations that include: generating a spectral image based on the spectral image data; and identifying, in the spectral image, a position of a first fiducial marker (180i) comprising a first material, based on a first X-ray absorption k-edge energy value (190i) of the first material.
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公开(公告)号：US12073491B2
公开(公告)日：2024-08-27
申请号：US17312036
申请日：2019-12-09
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： Heiner Daerr , Artur Sossin
CPC classification number: G06T11/003 , A61B6/4241 , A61B6/585 , G01T1/24 , G06T2200/24 , G06T2207/10116
Abstract: A System for image processing, comprising an input interface (IN) for receiving energy resolved count data generated by a photon-counting detector (PCD) with at least 2 energy bin but preferable more than two. A count data transformer (DT) of the system is configured to perform a transformation operation to transform the energy resolved count data into transformed count data, the operation including applying one or more weights to the count data, the weights previously obtained based on i) calibration image data for the or a photon-counting detector and ii) calibration image data for an energy integrating detector. A data convertor component (CC) is configured to convert the transformed count data into through-material path length data. The system allows emulating an energy integrating detector.
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公开(公告)号：US11529111B2
公开(公告)日：2022-12-20
申请号：US17265561
申请日：2019-08-06
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： Heiner Daerr
Abstract: The invention relates to a system and a method for determining a characteristic of a blood vessel portion, which comprises blood including a contrast agent exhibiting resonant absorption of x-ray photons at a specific energy. The system comprises a tunable monochromatic x-ray source (21) emitting x-ray radiation, an x-ray detector device (22) for detecting the x-ray radiation after it has travelled through the blood vessel portion. A control unit (26) varies a tuning of the x-ray source (21) to vary the energy of the x-ray radiation emitted by the x-ray source (21), and an evaluation unit (27) determines a tuning of the x-ray source (21) at which nuclear resonant absorption of the x-ray radiation incident onto the blood vessel portion occurs and estimates the characteristic on the basis of the determined tuning. The characteristic may particularly be the blood velocity in the blood vessel portion.
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公开(公告)号：US10080533B2
公开(公告)日：2018-09-25
申请号：US15104024
申请日：2014-12-16
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： Ewald Roessl , Heiner Daerr , Thomas Koehler
CPC classification number: A61B6/4241 , A61B6/032 , A61B6/035 , A61B6/405 , A61B6/482 , A61B6/542 , G01T1/247 , H01J35/06 , H01J35/10 , H01J2235/086 , H05G1/56 , H05G1/60
Abstract: An imaging system (100) includes a radiation source (110) with a focal spot (204) that emits a beam of x-ray photons that traverses an examination region (106). The imaging system further includes a photon counting detector array (122) that detects a sub-set of the x-ray photons that traverse an examination region. The imaging system further includes a controller (116) that generates and transmits a pause signal, in response to a calculated drop in an intensity of the emitted the beam of x-ray photons below a predetermined intensity level, which causes the photon counting detector array to pause detecting the sub-set of the x-ray photons. The imaging system further includes a counter (136) that counts, for each of a plurality of counting periods, the x-ray photons of the sub-set detected by the photon counting detector array in the corresponding counting period.
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公开(公告)号：US09750471B2
公开(公告)日：2017-09-05
申请号：US14889899
申请日：2014-05-10
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： Carsten Oliver Schirra , Axel Thran , Heiner Daerr , Ewald Roessl
CPC classification number: A61B6/4241 , A61B6/032 , A61B6/4233 , A61B6/482 , A61B6/583 , A61B6/585 , G01T1/161 , G01T1/169 , G01T7/005
Abstract: A method includes determining calibration factors for calibrating photon-counting detectors of a spectral imaging system by combining a heuristic calibration of the photon-counting detectors and an analytical calibration of the photon-counting detectors and generating a set of photon-counting calibration factors based on the combining of the a heuristic calibration and the analytical calibration. The photon-counting calibration factors, when applied to measured energy-resolved data from the photon-counting detectors of a spectral CT scan of a subject or object, mitigate spectral distortion caused by a radiation intensity profile shaper that filters a radiation beam of the spectral CT scan.
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Patent Agency Ranking
公开(公告)号：US09717470B2
公开(公告)日：2017-08-01
申请号：US14421008
申请日：2013-08-20
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： Gerhard Martens , Heiner Daerr , Thomas Detlef Istel , Ewald Roessl , Udo Van Stevendaal
CPC classification number: A61B6/587 , A61B6/484 , A61B6/582 , A61B6/588 , A61B6/589 , G01N23/20025 , G01N23/20075 , G01N2223/643
Abstract: An X-ray imaging method includes acquiring a differential phase contrast imaging X-ray scan with an X-ray imaging system having an X-ray source, an X-ray detector, and a grating arrangement having a source grating, a phase grating and an analyzer grating. The source grating is misaligned in respect to an interferometer such that moiré fringes are detectable in the plane of the detector. A translation signal is computed for translating the source grating for achieving a predetermined moiré pattern. The positioning of the source grating is adjusted in an X-ray projection direction based on the translation signal such that at least 2 pi of phase changes are covered with the Moiré fringes over the width of the detector. And a further differential phase contrast imaging X-ray scan is acquired.
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公开(公告)号：US11435488B2
公开(公告)日：2022-09-06
申请号：US17053890
申请日：2019-05-07
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： Roger Steadman Booker , Christoph Jan Herrmann , Klaus Erhard , Bernhard Johannes Brendel , Heiner Daerr , Artur Sossin , Axel Thran
Abstract: A radiation detector (100) adapted for detecting leakage currents is disclosed and comprises a direct conversion material (101) for converting incident radiation, at least one first electrode (108) and a plurality of second electrodes (103) connected to surfaces of the direct conversion material (101) for collecting each generated charges upon application of an electric field, at least one current measurement device (201), and a plurality of signal processing chains (210, 220, 230). Each signal processing chain comprises a readout unit (215, 216, 217, 218, 219) for discriminating between energy values with respect to the incident radiation, and a switching element (214) for sending signals on a first signal path (2141) electrically connecting one of the plurality of second electrodes with the readout unit, or on a second signal path electrically connecting the one of the plurality of second electrodes with an input to one of the at least one current measurement devices. A plurality of switching elements is configured to send signals on the second signal path for measuring a leakage current received at a corresponding plurality of second electrodes of the detector in the absence of incident radiation.
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公开(公告)号：US10758202B2
公开(公告)日：2020-09-01
申请号：US15758367
申请日：2016-09-22
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： Heiner Daerr , Thomas Koehler
Abstract: The present invention is directed towards spectral imaging, wherein a dedicated spectral imaging phantom is scanned with a spectral x-ray device to obtain spectral imaging data of the spectral imaging phantom. Said imaging data of the spectral imaging phantom is used as input for obtaining improved further imaging data of a subject of which a spectral scan is performed subsequent to or simultaneous with the spectral scan of the spectral imaging phantom. Improved further imaging data may be obtained by using the spectral phantom imaging data as input for imaging data correction, for providing a recommendation and/or for further data processing.
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公开(公告)号：US10725188B2
公开(公告)日：2020-07-28
申请号：US15762160
申请日：2016-10-11
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： Roger Steadman Booker , Ewald Roessl , Heiner Daerr
Abstract: Photon-counting x-ray detectors (3) suffer from a degradation of their performance due to polarization. In order to correct the effects of polarization to the generated x-ray images, the invention suggests (i) exposing the radiation detector (3) to a first radiation pulse emitted by a further radiation source (11) and obtaining a first electric pulse signal generated by the radiation detector (3) in response thereto, (ii) later exposing the 5 radiation detector (3) to a second radiation pulse emitted by the further radiation source (11) during the acquisition of the image and obtaining a second electric pulse signal generated by the radiation detector (3) in response thereto, and (iii) comparing amplitudes of the first and second electric pulse signals and generating the x-ray image based on a result of the comparison. The invention provides a corresponding x-ray device and a corresponding method.
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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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