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公开(公告)号：US20250057500A1
公开(公告)日：2025-02-20
申请号：US18723988
申请日：2022-12-23
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： HEINER DAERR , LESTER MILLER , CAROLINA MARIA RIBBING
IPC: A61B6/58
Abstract: Method and apparatus for predicting maintenance and failure of X-ray tubes are disclosed. X-ray radiation signals are received directly from one or more X-ray detectors without being attenuated by an object or subject under examination. The unattenuated X-ray radiation signals and scan metadata data are stored in memory, and time domain analysis and frequency domain analysis is performed on the stored X-ray radiation signals. Amplitude and frequency data for all peaks greater than a predetermined Signal to Noise Ratio (SNR) from a spectrum derived from the frequency analysis are stored. Components of an X-ray tube are monitored according to the stored amplitude and frequency data. The stored amplitude and frequency data for all peaks greater than the predetermined SNR may be written to a data file for further analysis.
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公开(公告)号：US20230263487A1
公开(公告)日：2023-08-24
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
CPC classification number: A61B6/12 , A61B6/4441 , A61B6/52
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：US20180140269A1
公开(公告)日：2018-05-24
申请号：US15569832
申请日：2016-05-06
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： EWALD ROESSL , HEINER DAERR
CPC classification number: A61B6/484 , A61B6/032 , A61B6/405 , A61B6/4241 , A61B6/4291 , A61B6/482 , G21K2207/005
Abstract: The intensity of an X-ray signal received at a detector after passing through an object of interest is a function of the attenuation, phase change, and scattering caused by the object of interest. In traditional X-ray systems, it was not possible to resolve these components. This application discusses an X-ray measurement technique which is insensitive to the variations in the interferometric pattern caused by phase differences in portions of the object of interest. Thus, received intensity measurements are caused only by attenuation and scattering components. By making two independent measurements of the object of interest using such a phase-invariant imager, the attenuation and scattering components may be separated, providing valuable extra information about the imaged object of interest arising from so-called “dark field” effects.
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公开(公告)号：US20240127500A1
公开(公告)日：2024-04-18
申请号：US18276902
申请日：2022-02-15
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： BERNHARD JOHANNES BRENDEL , KLAUS ALFRED ERHARD , CLAAS BONTUS , ARTUR SOSSIN , AXEL THRAN , HEINER DAERR
CPC classification number: G06T11/006 , G06T5/50 , G06T5/70 , G06T2211/408
Abstract: The present invention relates to a method (1), resp. a device, system and computer-program product, for material decomposition of spectral imaging projection data. The method comprises receiving (2) projection data acquired by a spectral imaging system and reducing (3) noise in the projection data by combining corresponding spectral values for different projection rays to obtain noise-reduced projection data. The method comprises applying (6) a first projection-domain material decomposition algorithm to the noise-reduced projection data to obtain a first set of material path length estimates, and applying (7) a second projection-domain material decomposition algorithm to the projection data to obtain a second set of material path length estimates. The second projection-domain material decomposition algorithm comprises an optimization that penalizes a deviation between the second set of material path length estimates being optimized and the first set of material path length estimates.
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公开(公告)号：US20220028127A1
公开(公告)日：2022-01-27
申请号：US17312036
申请日：2019-12-09
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： HEINER DAERR , ARTUR SOSSIN
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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Patent Agency Ranking
6.发明申请公开(公告)号：US20220217831A1
公开(公告)日：2022-07-07
申请号：US17610831
申请日：2020-05-06
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： HEINER DAERR , BERND RUDI DAVID
Abstract: An imaging system (202) includes an X-ray radiation source (210) configured to emit radiation that traverses an examination region. The imaging system further includes a controller (220). The controller is configured to control an X-ray tube peak voltage of the X-ray radiation source to switch between at least two different X-ray tube peak voltages during a kVp switched spectral scan. The controller is further configured to control a grid voltage of the X-ray radiation source to follow the X-ray tube peak voltage during the spectral scan. The controller adjusts the grid voltage based on a predetermined mapping between a currently applied X-ray tube peak voltage and a corresponding grid voltage for a given focal spot size, thereby maintaining the given focal spot size throughout the spectral scan.
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公开(公告)号：US20210382188A1
公开(公告)日：2021-12-09
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：US20210321967A1
公开(公告)日：2021-10-21
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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9.发明申请公开(公告)号：US20200251236A1
公开(公告)日：2020-08-06
申请号：US16637876
申请日：2018-08-14
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： HEINER DAERR , ROLAND PROKSA
IPC: G21K1/02 , G01T1/20 , G01N23/046 , G01T1/24
Abstract: An anti-scatter grid (ASG) for X-ray imaging with a surface (S) formed from a plurality of strips (LAM). The plurality of strips including at least two guard strips (Li,L i+1) that are thicker in a direction parallel to said surface than one or more strips l(i) of said plurality of strips (LAM). The one or more strips (li) being situated in between said two guard strips (Li,Li+1).
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公开(公告)号：US20250090112A1
公开(公告)日：2025-03-20
申请号：US18723996
申请日：2022-12-19
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： LESTER DONALD MILLER , HEINER DAERR , CAROLINA MARIA RIBBING
Abstract: Method and apparatus for monitoring the operational safety of an imaging system are disclosed. Radiation signals are received directly from one or more radiation detectors. The unattenuated radiation signals and scan metadata data are stored in memory, and time domain analysis and frequency domain analysis is performed on the stored radiation signals. Amplitude and frequency data for all peaks greater than a predetermined Signal to Noise Ratio (SNR) from a spectrum derived from the frequency analysis are recorded. The operational safety of the imaging system is monitored according to the recorded amplitude and frequency data. Previously recorded amplitude and frequency data that is written to a data file may be used to compare against currently recorded amplitude and frequency data or may be used to determine threshold values which when exceed by the currently recorded amplitude and frequency data generate a warning and/or automatic stop of an active scan.
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