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    IMPROVED IMAGE ACQUISITION
    1.
    发明申请
    IMPROVED IMAGE ACQUISITION 有权

    公开(公告)号：US20210041580A1

    公开(公告)日：2021-02-11

    申请号：US16978855

    申请日：2019-02-25

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Roger STEADMAN BOOKER ,  Roland PROKSA

    IPC: G01T1/17 ,  G01T1/29 ,  G01T1/20 ,  A61B6/00

    Abstract: The present invention relates to a detection device for X-rays, an imaging system and a method for detecting electro-magnetic radiation using a detection device for X-rays, wherein an estimate of an incomplete measurement is acquired prior to a discontinuity of the electromagnetic radiation, wherein the discontinuity is a change or interruption in a beam or in an intensity of the electromagnetic radiation.

    COMPUTED TOMOGRAPHY IMAGE GENERATION APPARATUS
    2.
    发明申请
    COMPUTED TOMOGRAPHY IMAGE GENERATION APPARATUS 审中-公开

    公开(公告)号：US20180211423A1

    公开(公告)日：2018-07-26

    申请号：US15756605

    申请日：2016-10-12

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Michael GRASS ,  Robert Johannes Frederik HOMAN ,  Roland PROKSA

    IPC: G06T11/00 ,  A61B6/03 ,  A61B6/00

    CPC classification number: G06T11/008 ,  A61B6/032 ,  A61B6/501 ,  A61B6/5205 ,  A61B6/5223 ,  A61B6/5264 ,  G06T11/006 ,  G06T2211/412 ,  G06T2211/424

    Abstract: The invention relates to a CT image generation apparatus (10) for generating an image of a head. Transformations of a first CT image of the head are determined for different measured projection groups, wherein for a measured projection group a transformation is determined such that a degree of similarity between the measured projection group and a calculated projection group is increased, wherein the calculated projection group is calculated by transforming the first CT image in accordance with the transformation to be determined and by forward projecting the transformed first CT image. A motion corrected three-dimensional second CT image is reconstructed based on the measured projections and the transformations determined for the different measured projection groups. This allows providing a high quality CT image of the head, even if a patient cannot stop moving the head in case of, for instance, stroke.

    AN X-RAY FLUX REDUCER FOR A PHOTON COUNTING DETECTOR
    3.
    发明申请
    AN X-RAY FLUX REDUCER FOR A PHOTON COUNTING DETECTOR 审中-公开

    公开(公告)号：US20170332984A1

    公开(公告)日：2017-11-23

    申请号：US15525079

    申请日：2015-11-11

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Bernhard Johannes BRENDEL ,  Roland PROKSA ,  Thomas KOEHLER ,  Ewald ROESSL ,  Heiner DAERR ,  Michael GRASS ,  Axel THRAN

    IPC: A61B6/06 ,  A61B6/03 ,  A61B6/04 ,  A61B6/00

    Abstract: An imaging system includes a radiation source (108) configured to rotate about an examination region (106)and emit radiation that traverses the examination region. The imaging system further includes an array of radiation sensitive pixels (112) configured to detect radiation traversing the examination region and output a signal indicative of the detected radiation. The array of radiation sensitive pixels is disposed opposite the radiation source, across the examination region. The imaging system further includes a rigid flux filter device (130) disposed in the examination region between the radiation source and the radiation sensitive detector array of photon counting pixels. The rigid flux filter device is configured to filter the radiation traversing the examination region and incident thereon. The radiation leaving the rigid flux filter device has a predetermined flux.

    PROJECTION DATA ACQUISITION APPARATUS
    4.
    发明申请
    PROJECTION DATA ACQUISITION APPARATUS 审中-公开

    公开(公告)号：US20170172525A1

    公开(公告)日：2017-06-22

    申请号：US15325158

    申请日：2015-07-13

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Roland PROKSA ,  Michael GRASS

    IPC: A61B6/06 ,  A61B6/03 ,  G01N23/04 ,  A61B6/00

    CPC classification number: A61B6/06 ,  A61B6/032 ,  A61B6/405 ,  A61B6/4429 ,  A61B6/5282 ,  A61B6/542 ,  G01N23/046

    Abstract: The invention relates to a projection data acquisition apparatus (31) for acquiring projection data. The projection data acquisition apparatus comprises a radiation device (32) for generating a pulsed radiation beam (4) for traversing an object and a detection device (6) for generating projection data being indicative of the pulsed radiation beam (4) at different acquisition positions, wherein the radiation device (32) is adapted to generate the pulsed radiation beam (4) such that at different acquisition positions the pulsed radiation beam (4) has different shapes, i.e. is differently blocked and/or attenuated. Thus, not the complete radiation providable by the radiation device is used at each acquisition position, but at least at some acquisition positions only a smaller pulsed radiation beam is used. This can lead to less scattered radiation and hence to improved projection data and an improved computed tomography image, which may be reconstructed based on the acquired projection data.

    ADAPTIVE PERSISTENT CURRENT COMPENSATION FOR PHOTON COUNTING DETECTORS
    5.
    发明申请
    ADAPTIVE PERSISTENT CURRENT COMPENSATION FOR PHOTON COUNTING DETECTORS 审中-公开

    公开(公告)号：US20160170039A1

    公开(公告)日：2016-06-16

    申请号：US15041100

    申请日：2016-02-11

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Roland PROKSA

    IPC: G01T1/17 ,  G01T1/24

    CPC classification number: G01T1/17 ,  G01T1/24 ,  G01T1/247 ,  G01T1/249

    Abstract: An imaging system (100) includes a direct conversion detector pixel (111) that detects radiation traversing an examination region and generates an electrical signal indicative thereof, wherein the signal includes a persistent current, which is produced by a direct conversion material of the pixel and which shifts a level of the signal. A persistent current estimator (116) estimates the persistent current and generates a compensation signal based on the estimate. A pre-amplifier (112) receives the signal and the compensation signal, wherein the compensation signal substantially cancels the persistent current, producing a persistent current compensated signal, and that amplifies the compensated signal, generating an amplified compensated signal. A shaper (114) generates a pulse indicative of energy of the radiation illuminating the direct conversion material based on the amplified compensated signal.

    COMPUTER TOMOGRAPHY X-RAY IMAGING
    8.
    发明申请
    COMPUTER TOMOGRAPHY X-RAY IMAGING 审中-公开

    公开(公告)号：US20190183443A1

    公开(公告)日：2019-06-20

    申请号：US15762114

    申请日：2017-09-04

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Bernhard Johannes BRENDEL ,  Thomas KOEHLER ,  Roland PROKSA

    IPC: A61B6/00 ,  G06T11/00 ,  A61B6/03

    CPC classification number: A61B6/482 ,  A61B6/032 ,  A61B6/4241 ,  A61B6/5211 ,  A61B6/5258 ,  G06T11/003 ,  G06T2207/10081 ,  G06T2211/408

    Abstract: The present invention relates to computer tomography X-ray imaging. In order to provide further improved data for the reconstruction, a system (10) for computer tomography X-ray imaging is provided. The system comprises a data interface (12) and a processing unit (14). The data interface is configured to provide at least first and second CT X-ray radiation projection data for at least a first and second X-ray energy range, which ranges are different from each other. The processing unit is configured to determine a correction for slice normalization, and to apply an equal slice normalization for the first and the second CT X-ray projection data and thereby generating prepared first and second CT X-ray projection data. For the correction, the equal slice normalization is based on measured data of outer detector elements. Further, the data interface is configured to provide the prepared first and second CT X-ray projection data for further processing. In an example, the system further comprises a computer tomography X-ray imaging acquisition arrangement (20) with an X-ray source (22) configured to generate an X-ray beam, and an X-ray detector (26) configured as an energy discriminating X-ray detector to simultaneously provide X-ray radiation projection data for at least two different X-ray energy ranges separately. The computer tomography X-ray imaging acquisition arrangement is configured to acquire at least the first and second CT X-ray projection data of a region of interest of an object for the at least first and second X-ray energy range.

    APPARATUS FOR GENERATING X-RAYS
    9.
    发明申请
    APPARATUS FOR GENERATING X-RAYS 审中-公开

    公开(公告)号：US20190133541A1

    公开(公告)日：2019-05-09

    申请号：US16097636

    申请日：2017-05-24

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Roland PROKSA ,  Daniela MUENZEL

    IPC: A61B6/00 ,  H05G1/20 ,  H05G1/08 ,  H01J35/06 ,  H01J35/08 ,  H01J35/04

    Abstract: The present invention relates to an apparatus for generating X-rays. It is described to produce (210) with a power supply (30) a voltage. A cathode (22) of an X-ray source (20) is positioned (220) relative to an anode (24) of the X-ray source. Electrons are emitted (230) from the cathode. Electrons emitted from the cathode interact (240) with the anode with energies corresponding to the voltage. X-rays are generated (250) from the anode, wherein the electrons interact with the anode to generate the X-rays. The X-ray source is controlled (260), such that a plurality of first X-ray pulses is generated each having a first X-ray flux, wherein the first X-ray pulses are temporally separated from each other. The X-ray source is controlled (270), such that a least one second X-ray pulse is generated having a second X-ray flux that is substantially less than the first X-ray flux, wherein the at least one second X-ray pulse is generated temporally between consecutive pulses of the first X-ray pulses.

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