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公开(公告)号：US20180270939A1
公开(公告)日：2018-09-20
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：US20250054209A1
公开(公告)日：2025-02-13
申请号：US18719891
申请日：2022-12-08
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： MICHAEL GRASS , CHRISTIAN WUELKER , THOMAS HEIKO STEHLE , ROLAND PROKSA , THOMAS KOEHLER
IPC: G06T11/00 , G06T3/4053
Abstract: A mechanism for processing projection data generated by a computed tomography scanner. The projection data is processed by a machine-learning algorithm trained to perform an up-sampling or super-resolution technique on input data in order to generate higher resolution projection data.
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公开(公告)号：US20240000411A1
公开(公告)日：2024-01-04
申请号：US18038746
申请日：2021-12-02
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： THOMAS KOEHLER , ROLAND PROKSA , KEVIN MARTIN BROWN
CPC classification number: A61B6/482 , A61B6/032 , A61B6/5205 , A61B6/467
Abstract: A method for use in a material decomposition procedure applied to dual-energy CT projection data. Material decomposition is often done using pre-computed lookup tables (LUTs) for mapping input projection data, acquired with particular X-ray source parameters, to material data values. However, the X-ray source parameters can vary over the course of a scan, making the results inaccurate. Embodiments are based on determining in advance a plurality of sets of basis LUTs for each of a plurality of different possible ranges of values over which the X-ray source parameter may vary during a scan. The basis LUTs in each set are devised as being LUTs which represent the majority contribution to the overall material decomposition function for the time-varying energy spectrum. When performing a material decomposition procedure, an appropriate set of the basis LUTs is chosen, based on an identified range of variation of the X-ray source parameter during the scan, and a linear combination of the basis LUTs is defined, using weightings which depend upon instantaneous values of the X-ray source parameter during the scan period.
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Patent Agency Ranking
公开(公告)号：US20220406555A1
公开(公告)日：2022-12-22
申请号：US17776407
申请日：2020-11-06
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： ROLF KARL OTTO BEHLING , ROLAND PROKSA , BERNHARD GLEICH , BERND RUDI DAVID , CLAAS BONTUS , TOBIAS REUSCH , AXEL THRAN
Abstract: The present invention relates to a rotary anode X-ray source. In addition to a primary cathode of a rotary anode X-ray tube, an auxiliary cathode is provided in the rotary anode X-ray tube. Electrons from the auxiliary cathode are focused into an area on the anode, from which X-rays cannot enter the used X-ray beam generated by the primary cathode. An emission current controlling device is used to control the electron emission of the auxiliary cathode. Thus, the voltage down-ramp for dual energy scanning is kept constant even though the primary X-ray output changes for the sake of dose modulation or during a transient of the primary electron current.
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公开(公告)号：US20220000580A1
公开(公告)日：2022-01-06
申请号：US17477795
申请日：2021-09-17
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： BERNARDUS HENDRIKUS WILHELMUS HENDRIKS , MICHAEL GRASS , THOMAS KOEHLER , HAROLD AGNES WILHELMUS SCHMEITZ , ROLAND PROKSA , VISHNU VARDHAN PULLY , MARCO ANDREAS JACOBUS VAN AS , WALTHERUS CORNELIS JOZEF BIERHOFF , FRANCISCUS MARINUS ANTONIUS MARIA VAN GAAL , DRAZENKO BABIC
Abstract: The invention relates to an active marker device (100) for being introduced into a human tissue and for tracking a region of interest of a human body. The active marker device comprises a light source (101) for emitting light such that the emitted light can be detected by an optical sensor. In this way, the active marker device and/or the region of interest can be tracked by a tracking system comprising the optical sensor. The active marker device (100) further comprises a switch (102) for turning the light source on and off and for operating the light source in a pulsed mode.
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16.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：US20190116654A1
公开(公告)日：2019-04-18
申请号：US16086440
申请日：2017-03-21
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： LESTER DONALD MILLER , NIRMAL SONI , ROLF KARL OTTO BEHLING , ROLAND PROKSA , DIONYS VAN DE VEN
Abstract: The present invention relates to an apparatus for generating X-rays. It is described to produce (210) with a power supply (40) at least two voltages between at least one cathode (20) and an anode (30), wherein the at least two voltages comprises a first voltage and a second voltage. The at least one cathode is positioned relative to the anode. Electrons are emitted (220) from the at least one cathode. Electrons emitted from the at least one cathode are interacted (230) with the anode with energies corresponding to the at least two voltages. X-rays are generated (230) from the anode, wherein the electrons interact with the anode to generate the X-rays. First X-rays are generated when the power supply produces the first voltage and second X-rays are generated when the power supply produces the second voltage. The power supply is controlled (250), such that a ratio between the first X-rays and the second X-rays is controllable.
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公开(公告)号：US20170340406A1
公开(公告)日：2017-11-30
申请号：US15535455
申请日：2015-12-14
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： BERNARDUS HENDRIKUS WILHELMUS HENDRIKS , MICHAEL GRASS , THOMAS KOEHLER , HAROLD AGNES WILHELMUS SCHMEITZ , ROLAND PROKSA , VISHNU VARDHAN PULLY , MARCO ANDREAS JACOBUS VAN AS , WALTHERUS CORNELIS JOZEF BIERHOFF , FRANCISCUS MARINUS ANTONIUS MARIA VAN GAAL , DRAZENKO BABIC
CPC classification number: A61B90/39 , A61B34/20 , A61B2034/2057 , A61B2090/3945
Abstract: The invention relates to an active marker device (100) for being introduced into a human tissue and for tracking a region of interest of a human body. The active marker device comprises a light source (101) for emitting light such that the emitted light can be detected by an optical sensor. In this way, the active marker device and/or the region of interest can be tracked by a tracking system comprising the optical sensor. The active marker device (100) further comprises a switch (102) for turning the light source on and off and for operating the light source in a pulsed mode.
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