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    Grating-based differential phase contrast imaging
    11.
    发明授权
    Grating-based differential phase contrast imaging 有权

    公开(公告)号：US09757081B2

    公开(公告)日：2017-09-12

    申请号：US14405422

    申请日：2013-06-20

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Roland Proksa

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

    CPC classification number: A61B6/484 ,  A61B6/032 ,  A61B6/035 ,  A61B6/0457 ,  A61B6/4035 ,  A61B6/4266 ,  A61B6/4291 ,  A61B6/4417 ,  A61B6/4435 ,  A61B6/502 ,  A61B6/504 ,  A61B6/5205 ,  A61B6/54

    Abstract: An imaging system (200) is configured for grating-based DPCI. The imaging system includes a rotating gantry (204) that rotates around an examination region, a radiation source (208), supported by the rotating gantry, that emits radiation that traverses the examination region, a detector array (212), supported by the rotating gantry, that detects radiation that traverses the examination region, and an interferometer, supported by the rotating gantry, which includes a source grating (214), a phase grating (218), and an absorber grating (220). At least one of the phase grating or the absorber grating continuously translates with respect to the other during an integration period and the detector generates and outputs an electrical signal indicative of the detected radiation, wherein the electrical signal includes an absorption component, a coherence component and a phase component.

    IMAGE RECONSTRUCTION IN INTERLEAVED MULTI-ENERGY IMAGING
    13.
    发明申请
    IMAGE RECONSTRUCTION IN INTERLEAVED MULTI-ENERGY IMAGING 有权
    交互式多能量成像中的图像重构

    公开(公告)号：US20150170358A1

    公开(公告)日：2015-06-18

    申请号：US14407971

    申请日：2013-06-13

    Applicant: KONINKLIJKE PHILIPS N.V. ,  PHILIPS DEUTSCHLAND GMBH

    Inventor： Hanno Heyke Homann ,  Roland Proksa

    IPC: G06T7/00 ,  G06K9/52 ,  G06K9/62 ,  G06T5/00

    CPC classification number: G06T7/0012 ,  G06K9/52 ,  G06K9/6267 ,  G06T5/001 ,  G06T11/008 ,  G06T2211/436

    Abstract: The present invention discloses a method for reconstructing an image obtained from kVp switched imaging of a body by acquiring a plurality of images at a first kVp defining a first image scan and a plurality of images at a second kVp defining a second image scan, wherein the plurality of images at the first kVp are acquired interleaved with the plurality of images of the second image scan and by reconstructing an image from the first and second image scan, comprising determining at least one gradient location for at least two images in the first and second image scans, determining divergent gradient locations in respect of a same part of the body for said at least two images in the first and second image scans, tagging each divergent gradient location as an under sampling artifact, generating the reconstructed image from the at least two images in the first and second image scans by correcting for each tagged under sampling artifact. The invention further discloses an imaging system for imaging at least a part of a body by means of a first image scan and a second image scan and a computer program product.

    Abstract translation: 本发明公开了一种用于通过以限定第一图像扫描的第一kVp和在限定第二图像扫描的第二kVp处的多个图像获取多个图像来重建从主体的kVp切换成像获得的图像的方法，其中， 获取与第一图像扫描的多个图像交错的第一kVp处的多个图像，并且通过重建来自第一和第二图像扫描的图像，包括确定第一和第二图像中的至少两个图像的至少一个梯度位置 图像扫描，确定在第一和第二图像扫描中所述至少两个图像相对于身体的相同部分的发散梯度位置，将每个发散梯度位置标记为欠采样伪影，从至少两个图像生成重建图像 通过校正每个被标记的采样伪像，在第一和第二图像扫描中的图像。 本发明还公开了一种用于通过第一图像扫描和第二图像扫描以及计算机程序产品对身体的至少一部分进行成像的成像系统。

    HIGH FLUX PHOTON COUNTING DETECTOR ELECTRONICS
    14.
    发明申请
    HIGH FLUX PHOTON COUNTING DETECTOR ELECTRONICS 有权
    高通量光电计数检测器电子

    公开(公告)号：US20150063533A1

    公开(公告)日：2015-03-05

    申请号：US14387950

    申请日：2013-03-08

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Roland Proksa ,  Robert Steadman Booker

    IPC: G01T1/17 ,  G01T1/16

    CPC classification number: G01T1/171 ,  G01T1/1606

    Abstract: An imaging system (100) includes a radiation source (108) that emits radiation that traverses an examination region, a paralyzable photon counting detector pixel (110) that detects photons traversing the examination region and arriving at an input photon rate and that generates a signal indicative thereof, high flux electronics (122) that produce a total time over threshold value each integration period based on the signal, a reconstruction parameter identifier (124) that estimates the input photon rate based on the total time over threshold value and identifies a reconstruction parameter based on the estimate, and a reconstructor (130) that reconstructs the signal based on the identified reconstruction parameter.

    Abstract translation: 成像系统（100）包括发射穿过检查区域的辐射的辐射源（108），用于检测穿过检查区域并达到输入光子速率并产生信号的信号的可分析光子计数检测器像素（110） 基于该信号，每个积分周期产生超过阈值的总时间的高通量电子器件122;基于超过阈值的总时间估计输入光子速率的重构参数标识符（124），并识别重建 基于所述估计的参数，以及基于所识别的重建参数重构所述信号的重建器（130）。

    System for X-ray dark-field, phase contrast and attenuation image acquisition
    15.
    发明授权
    System for X-ray dark-field, phase contrast and attenuation image acquisition 有权

    公开(公告)号：US12082963B2

    公开(公告)日：2024-09-10

    申请号：US17636926

    申请日：2020-08-17

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Manuel Peter Viermetz ,  Thomas Koehler ,  Roland Proksa ,  Franz Josef Pfeiffer

    IPC: A61B6/58 ,  A61B6/00 ,  A61B6/03 ,  A61B6/40 ,  A61B6/42

    CPC classification number: A61B6/484 ,  A61B6/582 ,  A61B6/032 ,  A61B6/4035 ,  A61B6/4291

    Abstract: The present invention relates to a system (10) for X-ray dark-field, phase contrast and attenuation image acquisition. The system comprises an X-ray source (20), an interferometer arrangement (30), an X-ray detector (40), a control unit (50), and an output unit (60). An axis is defined extending from a centre of the X-ray source to a centre of the X-ray detector. An examination region is located between the X-ray source and the X-ray detector. The axis extends through the examination region, and the examination region is configured to enable location of an object to be examined. The interferometer arrangement is located between the X-ray source and the X-ray detector. The interferometer arrangement comprises a first grating (32) and a second grating (34). For a first mode of operation: The control unit is configured to control at least one lateral movement transducer (70) to move the first grating or move the second grating in a lateral position direction perpendicular to the axis. The control unit is configured to control the X-ray detector to acquire image data whilst the first grating and/or second grating is moving. During an exposure time of the X-ray detector the first grating and/or second grating has moved a distance less than a period of the first grating and/or second grating. The control unit is configured to control movement of the first grating and/or second grating such that the image data is acquired whilst the first grating and/or second grating is moving. For the first mode of operation the output unit is configured to output one or more of: dark-field image data, phase contrast image data, and attenuation image data.

    Apparatus for generating multi energy data from phase contrast imaging data
    16.
    发明授权
    Apparatus for generating multi energy data from phase contrast imaging data 有权

    公开(公告)号：US11234663B2

    公开(公告)日：2022-02-01

    申请号：US16348269

    申请日：2017-11-09

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Roland Proksa

    IPC: A61B6/00

    Abstract: An apparatus provides phase contrast X-ray image data of a region of interest of an object. Attenuation X-ray image data of the region of interest of the object is also provided. A first basis data set is generated from the phase contrast X-ray image data. A second basis data set is generated from the phase contrast X-ray image data and the attenuation X-ray image data.

    Method and device for determining a spectral computed tomography scan protocol
    17.
    发明授权
    Method and device for determining a spectral computed tomography scan protocol 有权

    公开(公告)号：US11000238B2

    公开(公告)日：2021-05-11

    申请号：US16611868

    申请日：2018-08-29

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Roland Proksa

    IPC: A61B6/00 ,  A61B6/03

    Abstract: The present invention relates to a method (500) for determining a spectral scan protocol for acquiring a computed tomography (CT) image using a CT scanner and a corresponding apparatus (600). The method (500) comprises the steps of defining (510) a conventional scan protocol having scan restrictions for acquiring a conventional CT image; determining (520) a spectral scan protocol comprising a proportion of a first acquisition mode (201) and a proportion of a second acquisition mode (202), wherein the spectral scan protocol resembles the conventional scan protocol; and determining (520) the proportion of the first acquisition mode (201) and the proportion of the second acquisition mode (202) so that the scan restrictions of the conventional scan protocol are met. The method (500) and corresponding apparatus allows the determination of spectral scan protocols which reduce spectral scan mode restrictions.

    Apparatus for generating X-rays
    18.
    发明授权
    Apparatus for generating X-rays 有权

    公开(公告)号：US10791615B2

    公开(公告)日：2020-09-29

    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

    IPC: H05G1/32 ,  H05G1/58 ,  H01J35/06 ,  H01J35/10 ,  H01J35/04 ,  G01V5/00 ,  H05G1/10

    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.

    Edge detection on images with correlated noise
    19.
    发明授权
    Edge detection on images with correlated noise 有权

    公开(公告)号：US10580138B2

    公开(公告)日：2020-03-03

    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

    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).

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