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    ADJUSTABLE BOW-TIE FILTER FOR ACHIEVING OPTIMAL SNR IN HELICAL COMPUTED TOMOGRAPHY
    22.
    发明申请
    ADJUSTABLE BOW-TIE FILTER FOR ACHIEVING OPTIMAL SNR IN HELICAL COMPUTED TOMOGRAPHY 有权
    用于在耳蜗计算机图像中实现最佳信噪比的可调节滤波滤波器

    公开(公告)号：US20160174917A1

    公开(公告)日：2016-06-23

    申请号：US14910068

    申请日：2014-08-05

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Thomas KOEHLER ,  Roland PROKSA

    IPC: A61B6/00 ,  A61B6/03

    CPC classification number: A61B6/4035 ,  A61B6/032

    Abstract: A filter assembly for use in a helical computed tomography system having an x-ray source for projecting x-ray beams along a projection axis is presented, the filter assembly including a first filter element for attenuating at least a portion of the x-ray beams, the first filter element constructed as a background-wedge for attenuating x-rays having a large aperture and a second filter element for attenuating at least a portion of the x-ray beams, the second filter element constructed to create a ridge. The second filter element may be rotated with respect to or adjusted in relation with or removed or replaced from the filter assembly to allow for adaptation to different helical pitch values.

    Abstract translation: 提供了一种用于螺旋计算机断层摄影系统的过滤器组件，其具有用于沿着投影轴线投影x射线束的x射线源，所述过滤器组件包括用于衰减X射线束的至少一部分的第一滤光器元件 构成为用于衰减具有大孔径的X射线的背景楔的第一滤光器元件和用于衰减X射线束的至少一部分的第二滤光器元件，第二滤光器元件被构造成产生脊。 第二过滤器元件可以相对于过滤器组件相对于或与过滤器组件相关或相关地移动或移除或替换，以允许适应不同的螺旋桨距值。

    METHOD OF COMPUTED TOMOGRAPHY IMAGING
    23.
    发明申请
    METHOD OF COMPUTED TOMOGRAPHY IMAGING 审中-公开

    公开(公告)号：US20180303436A1

    公开(公告)日：2018-10-25

    申请号：US15770773

    申请日：2016-11-01

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Roland PROKSA ,  Heiner DAERR ,  Daniela MUENZEL ,  Peter NOEL

    IPC: A61B6/03 ,  A61B6/00

    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.

    X-RAY SOURCE
    24.
    发明申请
    X-RAY SOURCE 审中-公开

    公开(公告)号：US20180249566A1

    公开(公告)日：2018-08-30

    申请号：US15753698

    申请日：2016-08-24

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Roland PROKSA ,  Lester Donald MILLER

    IPC: H05G1/20 ,  A61B6/03 ,  A61B6/00 ,  H05G1/08 ,  H05G1/50

    CPC classification number: H05G1/20 ,  A61B6/032 ,  A61B6/4035 ,  A61B6/405 ,  H05G1/085 ,  H05G1/50

    Abstract: The invention relates to an X-ray source (2) for an imaging device comprising at least three electrodes; a power supply configured to provide a primary gap voltage between a first (13) and a second (12) electrode among said at least three electrodes, said primary gap voltage having an AC component, causing a transport of electrons from the first electrode toward the second electrode; and a controller configured to supply a variable potential on a third electrode (14) among said at least three electrodes, wherein the X-ray source is configured to generate an X-ray beam with an energy spectrum based on the voltage difference between the first electrode and the second electrode, and wherein the controller is configured to set the variable potential on the third electrode to a value causing at least a partial blocking of said transport of electrons, whenever a predetermined condition is met.

    X-RAY DETECTOR FOR PHASE CONTRAST AND/OR DARK-FIELD IMAGING
    25.
    发明申请
    X-RAY DETECTOR FOR PHASE CONTRAST AND/OR DARK-FIELD IMAGING 审中-公开

    公开(公告)号：US20180226168A1

    公开(公告)日：2018-08-09

    申请号：US15745234

    申请日：2016-07-20

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Roland PROKSA

    IPC: G21K1/06 ,  G01T1/20 ,  A61B6/00 ,  G01N23/041 ,  G01T7/00

    Abstract: The present invention relates to X-ray imaging. In order to reduce X-ray dose exposure during X-ray image acquisition, an X-ray detector is provided that is suitable for phase contrast and/or dark-field imaging. The X-ray detector comprises a scintillator layer (12) and a photodiode layer (14). The scintillator layer is configured to convert incident X- ray radiation (16) modulated by a phase grating structure (18) into light to be detected by the photodiode layer. The scintillator layer comprises an array of scintillator channels (20) periodically arranged with a pitch (22) forming an analyzer grating structure. The scintillator layer and the photodiode layer form a first detector layer (24) comprising a matrix of pixels (26). Each pixel comprises an array of photodiodes (28), each photodiode forming a sub-pixel (30). Adjacent sub-pixels during operation receive signals having mutually shifted phases. The sub-pixels that during operation receive signals having mutually identical phase form a phase group per pixel. The signals received by the sub-pixels within the same phase group per pixel during operation are combined to provide one phase group signal (32). The phase group signals of different phase groups during operation are obtained in one image acquisition. In an example, the pitch of the scintillator channels is detuned by applying a correcting factor c to a fringe period (Pfringe) of a periodic interference pattern (35) created by the phase grating structure, wherein 0

    EDGE DETECTION ON IMAGES WITH CORRELATED NOISE
    27.
    发明申请
    EDGE DETECTION ON IMAGES WITH CORRELATED NOISE 审中-公开

    公开(公告)号：US20180130212A1

    公开(公告)日：2018-05-10

    申请号：US15574173

    申请日：2016-06-15

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Thomas KOEHLER ,  Roland PROKSA

    IPC: G06T7/13 ,  G06T7/174 ,  G06T7/187

    CPC classification number: G06T7/13 ,  G06T7/174 ,  G06T7/187 ,  G06T2207/20076 ,  G06T2207/30004 ,  G06T2211/408

    Abstract: An image processing system comprising: an input port (IN) for receiving two input images acquired of an object. Respective contrast in said images encodes information on different physical properties of the object. The images being converted from a signal detected at a detector (D) of an imaging apparatus (IM). A differentiator of the image processing system forms respective differences from pairs of image points from the respective input images. An edge evaluator (EV) computes, based on said differences, an edge score for at least one of said pairs of image points. The score is based on a measure that represents or is derivable from a conditional noise likelihood function. The likelihood function is based on a probability density that models noise for said signal. Said score is output through an output port (OUT).

    IMAGING APPARATUS AND METHOD
    30.
    发明申请
    IMAGING APPARATUS AND METHOD 有权

    公开(公告)号：US20170196524A1

    公开(公告)日：2017-07-13

    申请号：US15036521

    申请日：2015-09-22

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Thomas KOEHLER ,  Roland PROKSA ,  Bernhard Johannes BRENDEL ,  Ewald ROESSL

    IPC: A61B6/00 ,  G21K1/02 ,  A61B6/03

    CPC classification number: A61B6/4291 ,  A61B6/032 ,  A61B6/4241 ,  A61B6/54 ,  A61B6/542 ,  G21K1/025

    Abstract: The present invention relates to an imaging apparatus and a corresponding imaging method. To avoid the disadvantages of a pile-up effect in the detection unit, an imaging apparatus is proposed comprising a radiation source (2) for emitting radiation from a focal region (20) through an imaging area (5), a detection unit (6) for detecting radiation from said imaging area (5), said detection unit comprising an anti-scatter grid (62) and a detector (61), a gantry (1) to which said radiation source (2) and said detection unit (6) are mounted and which allows rotation of said radiation source (2) and said detection unit (6) around said imaging area, and a controller (9) for controlling said detection unit (6) to detect radiation at a plurality of projection positions during rotation around said imaging area and for manipulating the position, setting and/or orientation of at least a part of said radiation source (2) and/or said detection unit (6) at first projection positions (80) so that the radiation incident on the detector (61) at said first projection positions is attenuated by anti-scatter grid (62) to a larger extent compared to second projection positions (80) representing the remaining projection positions.

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