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    APPARATUS AND METHOD FOR ACQUIRING DUAL ENERGY CBCT VOLUMETRIC RADIOGRAPHIES
    1.
    发明公开
    APPARATUS AND METHOD FOR ACQUIRING DUAL ENERGY CBCT VOLUMETRIC RADIOGRAPHIES 审中-公开

    公开(公告)号：EP4403112A1

    公开(公告)日：2024-07-24

    申请号：EP24151523.8

    申请日：2024-01-12

    申请人： CEFLA SOCIETA' COOPERATIVA

    发明人： CHIAMPAN, Simone

    IPC分类号： A61B6/03 ,  A61B6/00 ,  A61B6/02 ,  A61B6/51

    CPC分类号： A61B6/032 ,  A61B6/482 ,  A61B6/5235 ,  A61B6/5264 ,  A61B6/027 ,  A61B6/51

    摘要： CBCT apparatus (1, 11) configured for acquiring patient's two distinct pluralities of X-ray raw projections to be combined for dual energy imaging, comprising an X-ray source and an X-ray detector, said X-ray source and detector being supported in an opposed position, the object under investigation being positioned in an intermediate position between said X-ray source and detector and in the propagation bundle of the radiation emitted by said X-ray source, moreover said X-ray source and detector being movable along a pre-set trajectory thanks to at least a rotational movement of said X-ray source and detector around a rotation axis (R),
    wherein the acquisition of the first plurality of raw radiographic projections occurs with a first voltage of said X-ray source, while the acquisition of the second plurality of raw radiographic projections occurs with a second voltage of said X-ray source, different from the first voltage,
    characterized in that
    for acquiring the first plurality of raw projections at the first voltage, the rotation of said X-ray source and detector around the common axis of rotation (R) occurs in a direction opposite to the rotation direction of said X-ray source and detector around the common rotation axis (R) during the acquisition of the second plurality of raw radiographic projections at the second voltage, and in that
    the patient maintains the same position during the acquisition of the second plurality of raw images, which occurs immediately after the acquisition of the first plurality of raw projections.

    APPARATUS ADAPTING A TOMOSYNTHETIC SCAN MOTION ACCORDING TO PADDLE POSITION
    6.
    发明授权
    APPARATUS ADAPTING A TOMOSYNTHETIC SCAN MOTION ACCORDING TO PADDLE POSITION 有权

    公开(公告)号：EP2729070B1

    公开(公告)日：2018-08-08

    申请号：EP12733040.5

    申请日：2012-06-27

    申请人： Koninklijke Philips N.V.

    发明人： HEMMENDORFF, Magnus ,  HJÄRN, Torbjörn ,  LUNDQVIST, Mats ,  REHN, Jonas

    IPC分类号： A61B6/02

    CPC分类号： A61B6/4452 ,  A61B6/025 ,  A61B6/027 ,  A61B6/502 ,  A61B6/547

    摘要： According to one embodiment, the x-ray apparatus comprises an x-ray source adapted to emit an x-ray beam, a detector adapted to receive the x-ray beam of the x-ray source, wherein the x-ray source is adapted to be moved in relation to a first portion of the x-ray apparatus, wherein the detector is adapted to be moved in relation to a first portion of the x-ray apparatus, the x-ray apparatus further comprising a control unit for controlling the movement of the x-ray source and detector, wherein the x-ray source and the detector are adapted to rotate in relation to a first portion of the x-ray apparatus, wherein further the x-ray beam is directed essentially towards the detector during the movement of the x-ray source and the detector.

    CORRECTION FOR UN-VOLUNTARY RESPIRATORY MOTION IN CARDIAC CT
    7.
    发明授权
    CORRECTION FOR UN-VOLUNTARY RESPIRATORY MOTION IN CARDIAC CT 有权

    公开(公告)号：EP2224851B1

    公开(公告)日：2018-06-27

    申请号：EP08863864.8

    申请日：2008-12-12

    申请人： Koninklijke Philips N.V. ,  Philips Intellectual Property & Standards GmbH

    发明人： KOEHLER, Thomas

    IPC分类号： A61B6/03

    CPC分类号： A61B6/032 ,  A61B6/027 ,  A61B6/5217

    摘要： A CT angiography apparatus compensates for respiratory motion. During a helical scan, a radiation source and a detector generate data sets corresponding to a plurality of sub-volumes of a blood vessel over a plurality of cardiac cycles. Sub-volume data sets corresponding to a selected cardiac phase are reconstructed into a plurality of sub-volume images. Characteristic points in the sub-volume images are identified. A computer routine or processor calculates a respiratory motion vector based on the identified characteristic points in a plurality of the sub-volume images. An image reconstruction routine or processor reconstructs the original sub-volume data in the selected cardiac phase into a volume image representation using the calculated respiratory motion vector.

    TOMOGRAPHY APPARATUS AND METHOD OF RECONSTRUCTING TOMOGRAPHY IMAGE THEREOF
    9.
    发明公开
    TOMOGRAPHY APPARATUS AND METHOD OF RECONSTRUCTING TOMOGRAPHY IMAGE THEREOF 审中-公开
    层析摄影装置及其重建其层析图像的方法

    公开(公告)号：EP3217881A1

    公开(公告)日：2017-09-20

    申请号：EP15858221.3

    申请日：2015-09-21

    申请人： Samsung Electronics Co., Ltd.

    发明人： LEE, Kyoung-yong ,  NAM, Sang-nam ,  LEE, Duhgoon

    IPC分类号： A61B6/03 ,  G06T5/00

    CPC分类号： A61B6/032 ,  A61B6/027 ,  A61B6/4085 ,  A61B6/5205 ,  A61B6/5258 ,  A61B6/5288 ,  G06T7/0012 ,  G06T11/006 ,  G06T2207/10081 ,  G06T2211/421 ,  G06T2211/436

    摘要： A tomography apparatus that may reduce partial scan artifacts includes: a data acquirer configured to acquire tomography data when X-rays are emitted as a cone beam to an object while rotating by one cycle angular section that is less than one rotation; and an image reconstructor configured to reconstruct a tomography image by using corrected tomography data that is obtained by applying to the tomography data a weight that is set based on at least one of a view that is included in the one cycle angular section and a cone angle in the cone beam.

    摘要翻译： 一种可以减少部分扫描伪影的层析成像设备包括：数据获取器，被配置为当X射线作为锥形束向物体发射而旋转角度小于一周的一个角度区间时采集断层数据; 以及图像重构器，其被配置为通过使用校正的断层摄影数据来重构断层摄影图像，所述校正的断层摄影数据是通过对所述断层摄影数据应用基于包括在所述一个周期角部分中的视图和锥角中的至少一个而设置的权重而获得的 在锥束中。

    COMPUTED TOMOGRAPHY SYSTEM
    10.
    发明公开
    COMPUTED TOMOGRAPHY SYSTEM 有权
    计算机断层摄影系统

    公开(公告)号：EP3215015A1

    公开(公告)日：2017-09-13

    申请号：EP15797617.6

    申请日：2015-11-04

    申请人： Koninklijke Philips N.V.

    发明人： KOEHLER, Thomas ,  PROKSA, Roland ,  GRASS, Michael

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

    CPC分类号： A61B6/032 ,  A61B6/027 ,  A61B6/4241 ,  A61B6/481 ,  A61B6/482 ,  A61B6/5205 ,  A61B6/5241

    摘要： The invention relates to a computed tomography system (30). Several sets of spectral projections, which correspond to different positions of a radiation source (2) along a rotation axis (R), are decomposed into first projections being indicative of a contrast agent and second projections being not indicative of the contrast agent. An image is generated by a) determining for each first projection a contrast value being indicative of a total amount of contrast agent and scaling the first projections such that for different first projections of a same set the same contrast value is determined, and reconstructing an image based on the scaled first projections, and/or b) reconstructing for the different sets first images, scaling the first images such that they have a same intensity in overlap regions and combining the scaled first images. Thus, different contrast agent amounts can be balanced, thereby allowing for an improved image quality.

    摘要翻译： 本发明涉及一种计算机断层摄影系统（30）。 对应于沿旋转轴（R）的辐射源（2）的不同位置的若干组光谱投影被分解成指示造影剂的第一投影和不指示造影剂的第二投影。 通过以下步骤产生图像：a）为每个第一投影确定指示造影剂总量的对比度值并且缩放第一投影，使得对于同一组的不同第一投影确定相同的对比度值，并且重建图像 基于经缩放的第一投影，和/或b）针对不同的集合重建第一图像，缩放第一图像，使得它们在重叠区域中具有相同的强度并组合经缩放的第一图像。 因此，可以平衡不同的造影剂量，从而允许改善的图像质量。