IMAGING SYSTEM FOR THE GENERATION OF HIGH-QUALITY X-RAY PROJECTIONS
    1.
    发明申请
    IMAGING SYSTEM FOR THE GENERATION OF HIGH-QUALITY X-RAY PROJECTIONS 失效
    用于生成高质量X射线投影的成像系统

    公开(公告)号:US20090080751A1

    公开(公告)日:2009-03-26

    申请号:US11576702

    申请日:2005-10-06

    IPC分类号: G06K9/00

    摘要: The invention relates to an imaging system and a method for generating high-quality X-ray projections (24) of a patient (1). The system comprises a rotational X-ray device (10), for example a cone-beam CT-gantry (12), and an associated data processing unit (20). During a medical intervention, low-dose raw projections (22) of the patient (1) are continuously generated from different directions. A volume of interest (23) is then reconstructed from said projections (22), from which high-quality virtual projections (24) can be calculated for a display on a monitor (25). The number and direction of said virtual projections (24) can be arbitrarily chosen by the user.

    摘要翻译: 本发明涉及一种用于产生患者(1)的高质量X射线投影(24)的成像系统和方法。 该系统包括旋转X射线装置(10),例如锥形束CT机架(12)和相关联的数据处理单元(20)。 在医疗干预期间,从不同方向连续地生成患者(1)的低剂量原始投影(22)。 然后从所述投影(22)重建感兴趣的体积(23),从而可以为监视器(25)上的显示计算高质量的虚拟投影(24)。 所述虚拟投影(24)的数量和方向可以由用户任意选择。

    MR method for two-dimensional or three-dimensional imaging of an
examination zone, and apparatus for carrying out the method
    2.
    发明授权
    MR method for two-dimensional or three-dimensional imaging of an examination zone, and apparatus for carrying out the method 失效
    用于检查区域的二维或三维成像的MR方法以及用于执行该方法的装置

    公开(公告)号:US5498961A

    公开(公告)日:1996-03-12

    申请号:US207529

    申请日:1994-03-07

    CPC分类号: G01R33/56383

    摘要: The invention relates to an MR method for two-dimensional or three-dimensional imaging of an examination zone, in which a set of raw data is measured repeatedly, an image of the examination zone can be reconstructed from each set, and the raw data of a set is acquired with different measurement parameters, and different sets contain raw data acquired with the same measurement parameters. Improved temporal resolution is achieved in that a set of auxiliary data is formed from at least two sets of raw data in order to produce an image representing the examination zone at a selectable instant, the auxiliary data being derived by interpolation from the raw data acquired with each time the same measurement parameters but at different measurement instants, the weight applied to the raw data entering the interpolation being greater as the time interval between the associated measurement instant and the selectable instant is smaller, the image of the examination zone being reconstructed from the set of auxiliary data.

    摘要翻译: 本发明涉及一种用于检查区域的二维或三维成像的MR方法,其中重复测量一组原始数据,可以从每个组重建检查区域的图像,并且原始数据 采集不同测量参数的集合,不同的集合包含采用相同测量参数获得的原始数据。 通过从至少两组原始数据形成一组辅助数据,以在可选择的时刻产生表示检查区域的图像,辅助数据通过从用 每次相同的测量参数,但是在不同的测量时刻,施加到进入插值的原始数据的权重随着相关联的测量时刻和可选择时刻之间的时间间隔而变大,则检查区域的图像从 一组辅助数据。

    Method of forming a series of MR images, and device for carrying out the
method
    3.
    发明授权
    Method of forming a series of MR images, and device for carrying out the method 失效
    形成一系列MR图像的方法,以及用于执行该方法的装置

    公开(公告)号:US5502385A

    公开(公告)日:1996-03-26

    申请号:US255510

    申请日:1994-06-08

    摘要: The invention relates to a method of forming a series of MR images in which, in the presence of a steady magnetic field, sequences comprising at least an RF pulse and a magnetic gradient field which is varied from one sequence to another are continuously applied to the examination zone, from the image signals thus generated there being reconstructed MR images, the oldest MR signals used for the reconstruction of an MR image being replaced upon reconstruction of the next MR image by the respective newly generated MR signals. Low-artefact reproduction of dynamic processes in the examination zone can be achieved by varying the direction of the magnetic gradient field active during the generation of an MR signal from one sequence to another so that the range of the magnetic gradient field directions required for the reconstruction is distributed between the respective newly generated MR signals. The invention also relates to a device for carrying out this method.

    摘要翻译: 本发明涉及一种形成一系列MR图像的方法,其中在存在稳定磁场的情况下,连续地将包括从一个序列到另一个序列变化的至少RF脉冲和磁梯度场的序列应用于 检查区域,从由此产生的图像信号存在重建的MR图像,用于通过相应的新产生的MR信号重构下一个MR图像而替换MR图像的最旧的MR信号。 可以通过在从一个序列到另一个序列的MR信号的生成期间改变有效的磁梯度场的方向来实现检查区中的动态过程的低品质再现,使得重建所需的磁梯度场方向的范围 分布在相应的新产生的MR信号之间。 本发明还涉及一种用于执行该方法的装置。

    Imaging system for the generation of high-quality X-ray projections
    4.
    发明授权
    Imaging system for the generation of high-quality X-ray projections 失效
    用于生成高质量X射线投影的成像系统

    公开(公告)号:US08160337B2

    公开(公告)日:2012-04-17

    申请号:US11576702

    申请日:2005-10-06

    IPC分类号: G06K9/00

    摘要: The invention relates to an imaging system and a method for generating high-quality X-ray projections (24) of a patient (1). The system comprises a rotational X-ray device (10), for example a cone-beam CT-gantry (12), and an associated data processing unit (20). During a medical intervention, low-dose raw projections (22) of the patient (1) are continuously generated from different directions. A volume of interest (23) is then reconstructed from said projections (22), from which high-quality virtual projections (24) can be calculated for a display on a monitor (25). The number and direction of said virtual projections (24) can be arbitrarily chosen by the user.

    摘要翻译: 本发明涉及一种用于产生患者(1)的高质量X射线投影(24)的成像系统和方法。 该系统包括旋转X射线装置(10),例如锥形束CT机架(12)和相关联的数据处理单元(20)。 在医疗干预期间,从不同方向连续地生成患者(1)的低剂量原始投影(22)。 然后从所述投影(22)重建感兴趣的体积(23),从而可以为监视器(25)上的显示计算高质量的虚拟投影(24)。 所述虚拟投影(24)的数量和方向可以由用户任意选择。

    Magnetic resonance imaging method for medical examinations
    5.
    发明授权
    Magnetic resonance imaging method for medical examinations 失效
    用于体格检查的磁共振成像方法

    公开(公告)号:US06288542B1

    公开(公告)日:2001-09-11

    申请号:US09273209

    申请日:1999-03-19

    IPC分类号: G01V300

    CPC分类号: G06T17/20 G06T1/0007

    摘要: The invention relates to an imaging method for medical examinations, notably MR examinations, in which a set of measurement values is acquired from measuring points which are irregularly distributed in the frequency domain (or in the k-space). Before an image in the space domain is generated from these measurement values by a Fourier transformation, the measurement values must be weighted in dependence on the density of the measuring points in the frequency domain. To this end, the measurement values are weighted in conformity with the magnitude of the Voronoi cells.

    摘要翻译: 本发明涉及一种用于医学检查,特别是MR检查的成像方法,其中从在频域(或k空间)中不规则地分布的测量点获取一组测量值。 在通过傅里叶变换从这些测量值生成空间域中的图像之前,必须根据频域中的测量点的密度对测量值进行加权。 为此,测量值与Voronoi单元的大小一致。

    System and method for enabling selection of an image registration transformation
    6.
    发明授权
    System and method for enabling selection of an image registration transformation 有权
    允许选择图像配准变换的系统和方法

    公开(公告)号:US08380007B2

    公开(公告)日:2013-02-19

    申请号:US12096648

    申请日:2006-12-05

    IPC分类号: G06K9/32

    摘要: System and method for enabling intra-operative selection of an image registration transformation for use in displaying a first image dataset and a second image dataset in correspondence with one another. Image dataset acquisition devices (12, 14) obtain the first and second image datasets. A similarity function indicative of a likelihood that the first and second image datasets are in correspondence with one another is computed by a processor (16) and then a ranking of each of a plurality of local maxima of the similarity function is determined. Registration transformations derived from a plurality of the local maxima are displayed on a display (18), and using a user-interface (22), a physician can select each registration transformation to ascertain visually whether it is the clinically-optimal registration transformation for subsequent use.

    摘要翻译: 用于使得能够在操作中选择图像配准变换以用于相互对应地显示第一图像数据集和第二图像数据集的系统和方法。 图像数据集获取装置(12,14)获得第一和第二图像数据集。 由处理器(16)计算指示第一和第二图像数据集彼此对应的可能性的相似度函数,然后确定相似度函数的多个局部最大值中的每一个的等级。 从多个本地最大值导出的登记变换被显示在显示器(18)上,并且使用用户界面(22),医师可以选择每个注册变换以在视觉上确定是否是用于后续的临床优化注册变换 使用。

    Catheter navigation system
    7.
    发明授权
    Catheter navigation system 有权
    导管导航系统

    公开(公告)号:US08108029B2

    公开(公告)日:2012-01-31

    申请号:US11997421

    申请日:2006-07-12

    申请人: Volker Rasche

    发明人: Volker Rasche

    IPC分类号: A61B5/05

    摘要: A method and system for navigation of a medical instrument, including: introducing at least three reference device(s) disposed to at least three reference locations; employing an imaging and guidance system to acquire a plurality of image projections corresponding to a desired anatomy including the reference devices, the plurality of image projections being sufficient to permit generating a three-dimensional modeling or reconstruction images corresponding to the reference devices. The method also includes measuring a position of the reference devices; formulating a transformation matrix based on comparing positions of the reference devices computed from the modeling or reconstruction images with the measured positions of the reference devices; and superimposing an image of a medical instrument in at least one of the plurality of image projections based on the transformation matrix and a position of the medical instrument.

    摘要翻译: 一种用于医疗器械导航的方法和系统,包括:引入设置在至少三个参考位置的至少三个参考装置; 使用成像和引导系统来获取对应于包括参考装置的期望解剖结构的多个图像投影,所述多个图像投影足以允许生成对应于参考装置的三维建模或重建图像。 该方法还包括测量参考装置的位置; 基于将从建模或重建图像计算的参考装置的位置与参考装置的测量位置的比较位置来制定变换矩阵; 以及基于所述变换矩阵和所述医疗器械的位置,将所述医疗器械的图像叠加在所述多个图像投影中的至少一个中。

    Low-dose iso-centering
    8.
    发明授权
    Low-dose iso-centering 有权
    低剂量等心

    公开(公告)号:US07845851B2

    公开(公告)日:2010-12-07

    申请号:US12065616

    申请日:2006-09-12

    申请人: Volker Rasche

    发明人: Volker Rasche

    IPC分类号: H05G1/02

    摘要: Iso-centering a volume of interest (VOI) (170) within a patient (168) to undergo examination on a rotational X-ray apparatus (100) is achieved by taking two differently-angled pictures (S210) and updating positional settings (172) for the patient's table (112) responsive to respectively displayed centering of the VOI (152). Alternatively, the operator identifies respective VOI centers (S410, S450) for each of the two displayed pictures, and corresponding table movement is automatically calculated (S420).

    摘要翻译: 通过采取两个不同角度的图像(S210)和更新位置设置(172)来实现在患者(168)内对感兴趣的体积(VOI)(170)进行对中以进行旋转X射线装置(100)的检查 ),用于响应于分别显示的VOI的中心点(152)的患者的桌子(112)。 或者,操作者为两个显示的图像中的每一个识别各自的VOI中心(S410,S450),并且自动计算相应的表移动(S420)。

    System and Method for Enabling Selection of an Image Registration Transformation
    9.
    发明申请
    System and Method for Enabling Selection of an Image Registration Transformation 有权
    用于启用图像注册转换选​​择的系统和方法

    公开(公告)号:US20080279430A1

    公开(公告)日:2008-11-13

    申请号:US12096648

    申请日:2006-12-05

    IPC分类号: G06T7/00

    摘要: System and method for enabling intra-operative selection of an image registration transformation for use in displaying a first image dataset and a second image dataset in correspondence with one another. Image dataset acquisition devices (12, 14) obtain the first and second image datasets. A similarity function indicative of a likelihood that the first and second image datasets are in correspondence with one another is computed by a processor (16) and then a ranking of each of a plurality of local maxima of the similarity function is determined. Registration transformations derived from a plurality of the local maxima are displayed on a display (18), and using a user-interface (22), a physician can select each registration transformation to ascertain visually whether it is the clinically-optimal registration transformation for subsequent use.

    摘要翻译: 用于使得能够在操作中选择图像配准变换以用于相互对应地显示第一图像数据集和第二图像数据集的系统和方法。 图像数据集获取装置(12,14)获得第一和第二图像数据集。 由处理器(16)计算指示第一和第二图像数据集彼此对应的可能性的相似度函数,然后确定相似度函数的多个局部最大值中的每一个的等级。 从多个本地最大值导出的登记变换被显示在显示器(18)上,并且使用用户界面(22),医师可以选择每个注册变换以在视觉上确定是否是用于后续的临床优化注册变换 使用。

    Multiscale localization procedure
    10.
    发明申请
    Multiscale localization procedure 有权
    多尺度定位程序

    公开(公告)号:US20060267579A1

    公开(公告)日:2006-11-30

    申请号:US10553771

    申请日:2004-04-14

    IPC分类号: G01R33/025

    摘要: Position measurements are often performed using a localization system with a given fixed capture range and accuracy and resolution. Having a fixed capture range often comes at the cost of decreased accuracy and resolution. According to the present invention, at the start, a large capture range is provided where the accuracy and resolution is low. In this large capture area, the target area can be identified and aimed at. With this identification, a smaller capture range is iteratively provided and centered around the region of interest, which leads to an increased accuracy and resolution.

    摘要翻译: 位置测量通常使用具有给定的固定捕获范围和精度和分辨率的定位系统执行。 具有固定的捕获范围通常来自降低精度和分辨率的代价。 根据本发明,开始时提供了精度和分辨率低的大的捕获范围。 在这个大的捕获区域,目标区域可以被识别和瞄准。 通过这种识别,迭代地提供较小的捕获范围并以感兴趣的区域为中心,这导致增加的精度和分辨率。