利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

12 条记录 (耗时 0.014 秒)

    VESSEL SEGMENTATION
    2.
    发明公开
    VESSEL SEGMENTATION 审中-公开
    GEFÄSSSEGMENTIERUNG

    公开(公告)号：EP2994879A1

    公开(公告)日：2016-03-16

    申请号：EP14718772.8

    申请日：2014-04-02

    申请人： Koninklijke Philips N.V.

    发明人： STAWIASKI, Jean ,  BONNEFOUS, Odile ,  RUIJTERS, Daniel Simon Anna ,  VAN NIJNATTEN, Fred Simon Berend

    IPC分类号： G06T7/00

    CPC分类号： G06T7/20 ,  A61B6/481 ,  A61B6/504 ,  A61B6/52 ,  G06T7/11 ,  G06T7/174 ,  G06T7/187 ,  G06T2207/10016 ,  G06T2207/10116 ,  G06T2207/30101 ,  G06T2207/30104

    摘要： The present invention relates to vessel segmentation. In order to provide an improved way of providing segmentation information with reduced X-ray dose, an X-ray image processing device (10) is provided that comprises an interface unit (12), and a data processing unit (14). The interface unit is configured to provide a sequence of time series angiographic 2D images of a vascular structure obtained after a contrast agent injection. The data processing unit is configured to determine an arrival time index of a predetermined characteristic related to the contrast agent injection for each of a plurality of determined pixels along the time series, and to compute a connectivity index for each of the plurality of the determined pixels based on the arrival time index. The data processing unit is configured to generate segmentation data of the vascular structure from the plurality of the determined pixels, wherein the segmentation data is based on the connectivity index of the pixels. The data processing unit is configured to provide the segmentation data for further purposes.

    摘要翻译： 本发明涉及血管分割。 为了提供一种提供具有降低的X射线剂量的分割信息的改进方式，提供了包括接口单元（12）和数据处理单元（14）的X射线图像处理设备（10）。 界面单元被配置为提供在造影剂注射后获得的血管结构的时间序列血管造影2D图像的序列。 数据处理单元被配置为沿着时间序列确定与多个确定的像素中的每一个相关的与造影剂注入相关的预定特征的到达时间索引，并且计算多个所确定的像素中的每一个的连接性指标 根据到达时间指标。 数据处理单元被配置为从多个确定的像素生成血管结构的分割数据，其中分割数据基于像素的连接性指数。 数据处理单元被配置成为进一步的目的提供分段数据。

    DEVICE AND METHOD FOR DETERMINING A VOLUME OF PROJECTION OF A DUAL-AXIS COMPUTED TOMOGRAPHY SYSTEM
    4.
    发明公开
    DEVICE AND METHOD FOR DETERMINING A VOLUME OF PROJECTION OF A DUAL-AXIS COMPUTED TOMOGRAPHY SYSTEM 审中-公开

    公开(公告)号：EP3459463A1

    公开(公告)日：2019-03-27

    申请号：EP17193169.4

    申请日：2017-09-26

    申请人： Koninklijke Philips N.V.

    发明人： VAN NIJNATTEN, Fred Simon Berend

    IPC分类号： A61B6/02 ,  A61B6/03 ,  A61B6/06 ,  A61B6/00

    摘要： The present invention relates to a device for determining a volume of projection of a dual-axis computed tomography system with at least one shutter, the device (1) comprising: an interface unit (2); a projection module (3); and a position determination module (4); wherein the interface unit (2) is configured to receive a volume of interest (44) for a computed tomography image showing an object (22); wherein the projection module (3) is configured to determine a volume of projection (41,42,46) of a detector (16) based on different simulated positions of the detector (16) on a trajectory around the object (22) and based on a variable simulated position of at least one shutter (15); and wherein the position determination module (4) is configured to determine the simulated position of the at least one shutter (15) for each determined simulated position of the detector (16) such that the volume of projection (41, 42, 46) corresponds to the volume of interest (44). The present invention avoids that parts of an object of interest are unintentionally not imaged in dual-axis computed tomography imaging whilst reducing x-ray absorption to parts of the object outside the volume of interest (44) and provides improved insight in the volume of projection (41, 42, 46) of a dual-axis trajectory acquisition.

    ISO-CENTERING IN C-ARM COMPUTER TOMOGRAPHY
    5.
    发明公开
    ISO-CENTERING IN C-ARM COMPUTER TOMOGRAPHY 审中-公开

    公开(公告)号：EP3360482A1

    公开(公告)日：2018-08-15

    申请号：EP17155385.2

    申请日：2017-02-09

    申请人： Koninklijke Philips N.V.

    发明人： RUIJTERS, Daniël Simon Anna ,  VAN NIJNATTEN, Fred Simon Berend ,  OLIVAN BESCOS, Javier ,  HERMANS, Ronaldus Petrus Johannes ,  BASELMANS, Adrie ,  KLEIN-TEESELINK, Ina ,  SCHEEPENS, Jeroen Gerard ,  CARELS, Walter ,  GRUNHAGEN, Thijs

    IPC分类号： A61B6/00 ,  A61B6/03 ,  A61B6/04 ,  A61B6/08

    CPC分类号： A61B6/4441 ,  A61B6/032 ,  A61B6/0457 ,  A61B6/08 ,  A61B6/488 ,  A61B6/5223 ,  A61B6/545 ,  A61B6/589

    摘要： The present invention relates to iso-centering an object of interest prior to computer tomography (CT) scanning for examination of a patient in a C-arm CT examination apparatus. In order to provide facilitated positioning and to overcome or at least minimize these drawbacks, a C-arm CT examination apparatus (10) for CT scanning for examination of a patient is provided. The apparatus comprises a patient support unit, an acquisition unit, a data processing and control unit, and a display unit. The patient support unit is configured to bed a patient, free of motion, on the patient support. The acquisition unit is configured to acquire scout images of the patient including the object of interest in a respective position of the apparatus having position parameters. The data processing and control unit is configured to store the images and at least one respective position parameter including the iso-center position relative to the image; and to adjust the position of the apparatus roughly into a present position for CT scanning of the object of interest; and to select at least one iso-centering image from the stored images and, by geometrical calculation using, firstly, the at least one stored position parameter of the iso-centering image including the stored iso-center position and using, secondly, at least one position parameter of the present position of the apparatus including the present iso-center, adopting the appearance of the at least one iso-centering image, such that the appearance of the iso-centering image is according to the present position of the C-arm including the present iso-center. The display unit is configured to display the at least one adopted image on a display device together with and relative to a representation of the present iso-center for iso-centering.

    SPECTRAL X-RAY IMAGING
    6.
    发明公开
    SPECTRAL X-RAY IMAGING 审中-公开

    公开(公告)号：EP4311492A1

    公开(公告)日：2024-01-31

    申请号：EP22186916.7

    申请日：2022-07-26

    申请人： Koninklijke Philips N.V.

    发明人： WITHAGEN, Petrus ,  HUMMEL, Erik ,  VAN NIJNATTEN, Fred Simon Berend ,  VAN DE HAAR, Peter ,  SCHÄFER, Dirk

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

    摘要： The present invention relates to spectral imaging. In order to provide a facilitated way of spectral imaging, a method (200) for spectral X-ray imaging is provided that comprises the steps of: first rotational moving (202) of support structures of an X-ray imaging device with an X-ray source and an X-ray detector mounted to the support structures in a first movement around a region of interest of a subject; while generating (204) X-ray radiation with first X-ray spectral properties during the first rotational moving and detecting (206) a first plurality of 2D X-ray images during the first rotational moving. Further, second rotational moving (208) of the support structures in a second movement around the region of interest of a subject, wherein the second movement is generally different to the first movement; while generating (210) X-ray radiation with second X-ray spectral properties during the second rotational moving and detecting (212) a second plurality of 2D X-ray images during the second rotational moving. Reconstructing (214) a spectral 3D data set from the first plurality of 2D X-ray images and the second plurality of 2D X-ray images; and providing (216) the spectral 3D data set.

    X-RAY CONTROLLED CONTRACT AGENT INJECTION
    9.
    发明公开
    X-RAY CONTROLLED CONTRACT AGENT INJECTION 审中-公开
    RAY控收缩剂注射

    公开(公告)号：EP2934318A1

    公开(公告)日：2015-10-28

    申请号：EP13824200.3

    申请日：2013-12-13

    申请人： Koninklijke Philips N.V.

    发明人： VAN NIJNATTEN, Fred Simon Berend

    IPC分类号： A61B5/11 ,  A61B5/026 ,  A61B5/0275 ,  A61B6/00 ,  A61M5/172

    摘要： An imaging system including a closed-loop controller (FC) for automatically adapting a power injector system (PJ). The power injector (PJ) injects contrast agent into an object (V) and the imager (100) acquires one or more images (AN, AN i) of the object (V) with the contrast agent resident therein. The controller (FC) calculates a desired optimal injection rate from the images (AN, ANi). Controller (FC) then controls the injector (PJ) according to the calculated optimal injection rate.