公开(公告)号：US11995746B2

公开(公告)日：2024-05-28

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

CPC classification number: G06T11/006 ,  G06T2211/432

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.

公开(公告)号：US11954769B2

公开(公告)日：2024-04-09

申请号：US17296589

申请日：2019-11-19

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Claas Bontus

IPC: G06T11/00

CPC classification number: G06T11/006 ,  G06T11/005 ,  G06T2210/41 ,  G06T2211/421 ,  G06T2211/424

Abstract: The invention refers to providing a system that allows to reduce the computational costs when using an iterative reconstructional algorithm. The system (100) comprises a providing unit (110) for providing CT projection data, a base image generation unit (120) for generating a base image based on the projection data, a modifying unit (130) for generating a modified image, wherein an image value of a voxel of the base image is modified based on the image value of the voxel, and an image reconstruction unit (140) for reconstructing an image using an iterative reconstruction algorithm that uses the modified image as a start image. Since the modifying unit is adapted to modify the base image, the base image can be modified such as to form an optimal start image for the chosen iterative reconstruction such that a faster convergence of the iterative reconstruction can be accomplished.

公开(公告)号：US20140306698A1

公开(公告)日：2014-10-16

申请号：US14357795

申请日：2012-11-13

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Claas Bontus ,  Ingo Schmale ,  Bernhard Gleich

IPC: G01R33/02 ,  G01N27/72

CPC classification number: G01R33/02 ,  A61B5/0515 ,  G01N27/72

Abstract: The present invention relates to an apparatus and a method for influencing and/or detecting magnetic particles in a field of view (28), in particular for examination of human patients. The apparatus comprises i) selection-and-focus means (120) for generating a magnetic selection-and-focus field (50), wherein said at least one set of selection-and-focus field coils comprises—at least one inner selection-and-focus field coil (113, 115) being formed as a closed loop about an inner coil axis (115a), first inner selection-and-focus field coil (115)—a group of at least two outer selection-and-focus field coils (116-119) arranged at a larger distance from said inner coil axis (115a) than said at least one inner selection-and-focus field coil (113, 115) and at different angular positions, each being formed as a closed loop about an associated outer coil axis (116a-119a), and ii) drive means (120) comprising a drive field signal generator unit (122) and drive field coils (124; 125, 126, 127) for changing the position in space and/or size of the two sub-zones (52, 54) in the field of view (28) by means of a magnetic drive field so that the magnetization of the magnetic material changes locally.

Abstract translation: 本发明涉及用于影响和/或检测视场（28）中的磁性颗粒的装置和方法，特别是用于人类患者的检查。 该装置包括i）用于产生磁选择和聚焦场（50）的选择和聚焦装置（120），其中所述至少一组选择和聚焦场线圈包括 - 至少一个内部选择 - 形成为围绕内部线圈轴线（115a）的闭环的第一内部选择和聚焦场线圈（115） - 至少两个外部选择和聚焦组 与所述至少一个内部选择和聚焦场效应线圈（113,115）相比，布置在比所述内部线圈轴线（115a）更大的距离处的不同角度位置的励磁线圈（116-119），每个形成为闭合 围绕相关联的外部线圈轴线（116a-119a）环路，以及ii）包括驱动场信号发生器单元（122）和用于改变空间位置的驱动场线圈（124; 125,126,127）的驱动装置（120） 和/或视场（28）中的两个子区（52,54）的尺寸，借助于磁驱动场，使得磁垫的磁化强度 当地的变化。

公开(公告)号：US12141899B2

公开(公告)日：2024-11-12

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.

公开(公告)号：US12226245B2

公开(公告)日：2025-02-18

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

IPC: A61B6/12 ,  A61B6/00

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.

公开(公告)号：US11890127B2

公开(公告)日：2024-02-06

申请号：US17419786

申请日：2020-01-06

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Claas Bontus ,  Holger Schmitt

IPC: A61B6/00 ,  A61B6/02 ,  A61B6/03 ,  A61B6/04 ,  A61B6/06

CPC classification number: A61B6/545 ,  A61B6/027 ,  A61B6/032 ,  A61B6/0407 ,  A61B6/06 ,  A61B6/405 ,  A61B6/4085 ,  A61B6/4233 ,  A61B6/4435

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.

公开(公告)号：US09689932B2

公开(公告)日：2017-06-27

申请号：US14357795

申请日：2012-11-13

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Claas Bontus ,  Ingo Schmale ,  Bernhard Gleich

IPC: G01V3/00 ,  A61B5/05 ,  G01V3/10 ,  G01R33/02 ,  G01N27/72

CPC classification number: G01R33/02 ,  A61B5/0515 ,  G01N27/72

Abstract: The present invention relates to an apparatus and a method for influencing and/or detecting magnetic particles in a field of view (28), in particular for examination of human patients. The apparatus comprises i) selection-and-focus means (120) for generating a magnetic selection-and-focus field (50), wherein said at least one set of selection-and-focus field coils comprises—at least one inner selection-and-focus field coil (113, 115) being formed as a closed loop about an inner coil axis (115a), first inner selection-and-focus field coil (115)—a group of at least two outer selection-and-focus field coils (116-119) arranged at a larger distance from said inner coil axis (115a) than said at least one inner selection-and-focus field coil (113, 115) and at different angular positions, each being formed as a closed loop about an associated outer coil axis (116a-119a), and ii) drive means (120) comprising a drive field signal generator unit (122) and drive field coils (124; 125, 126, 127) for changing the position in space and/or size of the two sub-zones (52, 54) in the field of view (28) by means of a magnetic drive field so that the magnetization of the magnetic material changes locally.