Reconstruction method for computer tomography and computer tomograph
    71.
    发明授权
    Reconstruction method for computer tomography and computer tomograph 有权
    计算机断层扫描和计算机断层扫描重建方法

    公开(公告)号:US07856079B2

    公开(公告)日:2010-12-21

    申请号:US11719304

    申请日:2005-11-07

    IPC分类号: A61B6/00

    摘要: It is an object of the invention to provide spiral computer tomography which has a high image quality. It relates to a reconstruction method for computer tomography of the heart, wherein the image is reconstructed from a data component of recordings of a partial detector path of a detector device and from a data component of recordings of a full detector path of the detector device, and to a computer tomograph having a beam source, a drive arrangement for driving the beam source in a spiral path around an object, a detector device for recording the radiation from the beam source which passes at least partially through the object, and a control device for reconstructing data components of a partial detector path and a full detector path.

    摘要翻译: 本发明的目的是提供具有高图像质量的螺旋计算机断层摄影。 本发明涉及用于心脏计算机断层摄影的重建方法,其中根据检测器装置的部分检测器路径的记录的数据分量和检测器装置的完整检测器路径的记录的数据分量来重建图像, 以及具有光束源的计算机断层摄影机,用于以围绕物体的螺旋路径驱动光束源的驱动装置,用于记录来自至少部分穿过物体的光束源的辐射的检测器装置,以及控制装置 用于重构部分检测器路径和完整检测器路径的数据分量。

    APPARATUS FOR DETERMINING A PARAMETER OF A MOVING OBJECT
    72.
    发明申请
    APPARATUS FOR DETERMINING A PARAMETER OF A MOVING OBJECT 审中-公开
    用于确定移动对象参数的装置

    公开(公告)号:US20100266182A1

    公开(公告)日:2010-10-21

    申请号:US12741397

    申请日:2008-11-04

    IPC分类号: G06K9/00

    摘要: The present invention relates to an apparatus for determining a parameter of a moving object, wherein the apparatus comprises an adaptive model providing unit (12) for providing an adaptive model of the object. The user can define the region of the adaptive model by a user interface (13). The apparatus further comprises an image data set providing unit (14) for providing a spatially and temporally dependent image data set of the moving object and an adaptation unit (15) for adapting at least a defined region of the adaptive model to the spatially and temporally dependent image data set for determining a spatially and temporally dependence of the defined region. The parameter of the moving object is determined depending on the spatially and temporally dependence of the defined region by a parameter determining unit (16).

    摘要翻译: 本发明涉及一种用于确定移动物体的参数的装置,其中,所述装置包括用于提供对象的自适应模型的自适应模型提供单元(12)。 用户可以通过用户界面(13)来定义自适应模型的区域。 该装置还包括用于提供移动物体的空间和时间上依赖的图像数据集的图像数据集提供单元(14),以及适配单元(15),用于至少将自适应模型的定义区域适应于空间和时间上 用于确定所定义区域的空间和时间依赖性的依赖图像数据集。 取决于由参数确定单元(16)定义的区域的空间和时间依赖性来确定移动对象的参数。

    Image segmentation in a volume data set
    73.
    发明授权
    Image segmentation in a volume data set 有权
    卷数据集中的图像分割

    公开(公告)号:US07813549B2

    公开(公告)日:2010-10-12

    申请号:US10596148

    申请日:2004-11-26

    IPC分类号: G06K9/34 G06K9/00

    摘要: Coronary artery segmentation is a crucial task in cardiac CT image processing. This is often a tedious task performed manually by an operator. According to the present invention, a method is provided which combines data from multiple cardiac phases during the segmentation process in order to deliver a complete and continuous coronary vessel tree. Advantageously, this may allow for an improved visualization and segmentation of vessels, for example, in coronary CTA.

    摘要翻译: 冠状动脉分割是心脏CT图像处理中的关键任务。 这通常是由操作员手动执行的繁琐的任务。 根据本发明,提供了一种在分割过程中组合来自多个心脏相的数据以递送完整且连续的冠状动脉血管树的方法。 有利地,这可以允许例如在冠状动脉CTA中改善血管的可视化和分割。

    Artifact reduction
    74.
    发明授权
    Artifact reduction 有权
    人工减少

    公开(公告)号:US07792347B2

    公开(公告)日:2010-09-07

    申请号:US11570512

    申请日:2005-06-14

    IPC分类号: G06K9/00 A61B6/00 A61B5/02

    CPC分类号: G06T11/005 G06T2211/412

    摘要: Minimizing the temporal width of the gating window during calculation of the gating function in cardiac CT may not result in best image quality with a maximum of signal-to-noise ratio and minimal artifacts. According to an exemplary embodiment of the present invention, the widths of the gating windows in cardiac CT are selected on the basis of a motion model describing the motion of the heart. According to an aspect of the present invention, the widths of the gating windows are determined by considering the duration of stationary cardiac phases. Thus, artifacts, such as motion artifacts or noise, are minimized.

    摘要翻译: 在计算心脏CT中门控功能时,最小化选通窗口的时间宽度可能无法以最大的信噪比和最小的人为因素产生最佳图像质量。 根据本发明的示例性实施例,基于描述心脏运动的运动模型来选择心脏CT中门控窗口的宽度。 根据本发明的一个方面,门控窗口的宽度通过考虑静止心脏相位的持续时间来确定。 因此,最小化诸如运动伪像或噪声的伪影。

    Apparatus for angiographic X-ray photography
    78.
    发明授权
    Apparatus for angiographic X-ray photography 失效
    用于血管造影X射线摄影的装置

    公开(公告)号:US07539529B2

    公开(公告)日:2009-05-26

    申请号:US10553770

    申请日:2004-04-21

    IPC分类号: A61B6/00 A61B6/02

    摘要: The invention relates to an X-ray imaging device for visualizing the blood flow in a coronary vascular tree of a patient. According to the invention a first set (1) of X-ray projection images of the vascular tree is recorded during various phases of the heart cycle with simultaneous recording of the ECG (2) of the patient. By means of a suitable program control, computer means (17) of the device according to the invention a reconstruction then follows of the three-dimensional structure of the vascular tree during the various phases of the heart cycle. The invention proposes, to determine the time-dependent concentration of contrast agent within the reconstructed three-dimensional structure of the vascular tree, that local image areas within the X-ray projection images of the second set (6) assigned to individual vascular segments (5, 8) are located in accordance with the spatial positions of the vascular segments (5, 8) in the relevant phase of the heart cycle. The concentration of contrast agent in the area of the vascular segments (5, 8) is then determined by evaluation of the X-ray absorption within the local image areas found.

    摘要翻译: 本发明涉及用于使患者的冠状动脉血管树中的血流可视化的X射线成像装置。 根据本发明,在心脏周期的各个阶段记录血管树的X射线投影图像的第一组(1),同时记录患者的ECG(2)。 通过合适的程序控制,根据本发明的装置的计算机装置(17)在心脏周期的各个阶段期间重建血管树的三维结构。 本发明提出,为了确定造影剂在血管树的重建三维结构内的时间依赖性浓度,将第二组(6)的X射线投影图像内的局部图像区域分配给各个血管节段 5,8)根据心脏周期的相关阶段中血管段(5,8)的空间位置来定位。 然后通过评估所发现的局部图像区域内的X射线吸收来确定血管片段(5,8)区域中造影剂的浓度。

    Method and device for flow reconstruction
    80.
    发明授权
    Method and device for flow reconstruction 有权
    流量重建方法和装置

    公开(公告)号:US07505551B2

    公开(公告)日:2009-03-17

    申请号:US10568838

    申请日:2004-08-10

    IPC分类号: A61B6/03

    摘要: The invention relates to a method and a device for the three-dimensional reconstruction of the flow conditions in a vascular system (3), in which, in a first phase after the beginning of a contrast-medium injection, X-ray projection pictures are produced from the same direction (A) at a high picture-taking rate in order to observe the inflow of the contrast medium. When the contrast medium fills the vascular system (3), a rotation of the Xray device (1) takes place during which projection pictures are produced at a lower picture taking rate and/or at a lower radiation dose, from which pictures the three-dimensional structure of the vascular tree can be reconstructed. Optionally, at the end of the rotation, projection pictures may again be taken from a fixed direction that observe the drainage of the contrast medium from the vascular system (3).

    摘要翻译: 本发明涉及一种用于三维重建血管系统(3)中的流动状态的方法和装置,其中在开始造影剂注射后的第一阶段,X射线投影图像是 以相同的方向(A)以高拍摄速度产生,以观察造影剂的流入。 当造影剂填充血管系统(3)时,发生X射线装置(1)的旋转,在该旋转装置(1)期间以较低的拍摄速度和/或较低的辐射剂量产生投影图像, 可以重建血管树的三维结构。 可选地,在旋转结束时,投影图片可以再次从观察造影剂从血管系统(3)排出的固定方向获取。