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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：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：US20220076461A1
公开(公告)日：2022-03-10
申请号：US17312993
申请日：2019-12-09
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： CLAAS BONTUS , THOMAS KOEHLER , BERNHARD BRENDEL
IPC: G06T11/00
Abstract: The invention relates to a system for reconstructing an image of an object. The system (100) comprises means (110) providing projection data acquired by an imaging unit, like a CT system, with an FOV, means (120) generating estimated image data indicative of a part of an object (20) located outside the FOV (210), means (130) estimating virtual projection data based on virtual settings of a virtual imaging unit comprising a virtual FOV, means (140) generating fused projection data by fusing the provided projection data with the virtual projection data, and means (150) reconstructing a final image. This allows basing the reconstruction on a complete set of projection information for the object and thus providing an image with a high image quality.
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公开(公告)号：US20230000458A1
公开(公告)日：2023-01-05
申请号：US17780496
申请日：2020-12-03
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： FRANK BERGNER , CLAAS BONTUS , KLAUS ERHARD , NIKOLAS DAVID SCHNELLBÄCHER , DIRK SCHÄFER , SVEN PETER PREVRHAL , PETER VERNICKEL
Abstract: An imaging system (MIS), optionally a medical imaging system, with wireless communication capability and related method. The imaging system comprises a gantry (RG) rotatable around a rotation axis. The gantry includes a detector device (D) capable of recording, in plural spatial positions, measurement data in relation to a subject (such as a patient) (PAT) to be imaged. The system also includes a radio transmitter (TX) for generating a directed radio beam propagatable along a propagation axis to transmit the measurement data to a radio receiver (RX). The radio transmitter (TX) is arranged at the rotatable gantry and is operable so that the propagation direction intersects the rotation axis in a location that is situated away from the rotatable gantry.
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公开(公告)号：US20210185792A1
公开(公告)日：2021-06-17
申请号：US17269678
申请日：2019-08-21
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： CLAAS BONTUS , TOBIAS REUSCH , BERND RUDI DAVID
Abstract: A computer tomography x-ray tube for generating pulsed x-rays is presented. The x-ray tube comprises an anode and an electron emission unit for generating a pulsed electron beam onto the anode. Furthermore, a rotation mechanism for rotating the anode characterized in that the rotation mechanism is configured for rotating the anode with an angular velocity that varies in time is comprised. The rotation mechanism may also be configured for rotating the anode such that the variation of the angular velocity in time is a continuous oscillation around a mean angular velocity ω0 in time. In a preferred embodiment the angular velocity ω (t) varies in time according to the following formula: ω(t)=ω0+Δω sin Ωt, wherein ω0 is a mean angular velocity. In a particular embodiment, the grid switch for generating the pulsed electron beam is comprised and the x-ray tube may be embodied as a stereo tube, in which two focal spots of electron beams are generated in an alternating manner.
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Patent Agency Ranking
公开(公告)号：US20240090849A1
公开(公告)日：2024-03-21
申请号：US18038546
申请日：2021-11-28
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： RAFAEL WIEMKER , LIRAN GOSHEN , HANNES NICKISCH , CLAAS BONTUS , TOM BROSCH , JOCHEN PETERS , ROLF JÜRGEN WEESE
IPC: A61B5/00 , A61B5/055 , G06V10/44 , G06V10/764
CPC classification number: A61B5/7425 , A61B5/055 , G06V10/44 , G06V10/764
Abstract: The present invention relates to multispectral imaging. In order to improve an identification of relevant multispectral material transitions (in particular caused by injected contrast agent), an apparatus is proposed to use the local maxima of the variances and/or covariances of the intensities of the multi-channel images to locate material transitions. In comparison to gradient vectors, the local variance is not directed and not prone to noise. An alternative apparatus is proposed to use the local covariance deficits of the intensities of the multi-channel images to locate material transitions. The proposed alternative approach is independent of spatial drifts across the image volume.
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公开(公告)号：US20230410307A1
公开(公告)日：2023-12-21
申请号：US18037586
申请日：2021-11-22
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： HANNES NICKISCH , HOLGER SCHMITT , CLAAS BONTUS , RAFAEL WIEMKER
CPC classification number: G06T7/0014 , A61B6/507 , A61B6/503 , G06T7/11 , G06T7/60 , G16H30/40 , G06T2207/20021 , G06T2207/30048 , G06T2207/30104 , G06T2207/10081
Abstract: A method for visualization may include: obtaining data of a first perfusion measure of myocardial tissues of a patient; obtaining data of a geometry of a coronary artery of the patient; obtaining data of a second perfusion measure of the coronary artery; obtaining data of a flow impediment measure along the coronary artery based on the data of the second perfusion measure of the coronary artery; and visualizing, on a single image, the first perfusion measure of the myocardial tissues and the coronary artery, the coronary artery being overlaid with the first perfusion measure on the single image, the visualized coronary artery representing the geometry of the coronary artery and the flow impediment measure along the coronary artery.
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公开(公告)号：US20220071586A1
公开(公告)日：2022-03-10
申请号：US17419786
申请日：2020-01-06
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： CLAAS BONTUS , HOLGER SCHMITT
Abstract: A device (10) for controlling an image acquisition of a multi-slice computed tomography system (1), MSCT, is disclosed. The device comprises an input (11) for receiving projection image data from the MSCT (1), an output (12) for controlling operation of the MSCT (1) and a processor (13). The processor (13) is adapted for controlling the MSCT to acquire a large volume localizer radiograph, and for defining an organ region in the localizer radiograph that delimits an organ of interest. The processor is adapted for acquiring a large volume helical CT scan of the subject, in which an X-ray cone angle is increased when the organ region in the subject is translated into the examination volume and decreased when the organ region is translated out of the examination volume.
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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：US20220180576A1
公开(公告)日：2022-06-09
申请号：US17442649
申请日：2020-03-24
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： KEVIN MARTIN BROWN , THOMAS KOEHLER , CLAAS BONTUS
IPC: G06T11/00
Abstract: An imaging system (702) includes a reconstructor (716) configured to reconstruct obtained cone beam projection data with a voxel-dependent redundancy weighting such that low frequency components of the cone beam projection data are reconstructed with more redundant data than high frequency components of the cone beam projection data to produce volumetric image data. A method includes reconstructing obtained cone beam projection data with a voxel-dependent redundancy weighting such that low frequency components are reconstructed with more redundant data than high frequency components to produce volumetric image data. A computer-readable storage medium, storing computer executable instructions, which when executed by a processor of a computer cause the processor to: obtain cone beam projection data and reconstruct the cone beam projection data with a voxel-dependent redundancy weighting such that low frequency components are reconstructed with more redundant data than high frequency components to produce volumetric image data.
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