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公开(公告)号：US5969525A
公开(公告)日：1999-10-19
申请号：US878363
申请日：1997-06-18
IPC分类号： G01R33/385 , A61B5/055 , G01R33/34 , G01R33/3415 , G01R33/38 , G01R33/3875 , G01V3/00
CPC分类号： G01R33/3806
摘要： MR imaging apparatus includes a magnet (1) for generating in an examination zone (3) a uniform, steady magnetic field having substantially parallel lines of force extending in a first direction (Z), a gradient coil system (5) for generating a magnetic gradient field, and an RF coil system for generating RF pulses and for receiving MR signals. The apparatus also includes devices (25,27,31) for generating data from the MR signals, and a reconstruction unit (39) for reconstructing an MR image of the examination zone (3) from a set of the data. A patient support system includes a table top (7) drive means (11) configured for displacement of the table top in the first direction (Z), and a connection (43) for coupling the drive means and the control unit (29). The magnet (1) has a generally toroidal-shaped housing (15) surrounding a bore (17) and has a longitudinal axis (19) extending substantially parallel to the first direction (Z). The housing (15) has a radial thickness (r) in a direction transverse to said axis (19) and a longitudinal thickness (1) in a direction substantially parallel to said axis, the radial thickness being greater than the longitudinal thickness.
摘要翻译： MR成像装置包括：磁体（1），用于在检查区（3）中产生具有在第一方向（Z）上延伸的基本上平行的力线的均匀的稳定磁场;梯度线圈系统（5），用于产生磁 梯度场和用于产生RF脉冲并用于接收MR信号的RF线圈系统。 该装置还包括用于从MR信号产生数据的装置（25,27,31）和用于从一组数据重建检查区（3）的MR图像的重建单元（39）。 患者支撑系统包括被配置为在第一方向（Z）上移动台面的台面（7）驱动装置（11）和用于联接驱动装置和控制单元（29）的连接件（43）。 磁体（1）具有围绕孔（17）的大致环形的壳体（15），并且具有基本上平行于第一方向（Z）延伸的纵向轴线（19）。 壳体（15）在垂直于所述轴线（19）的方向上具有径向厚度（r）和在基本上平行于所述轴线的方向上的纵向厚度（1），径向厚度大于纵向厚度。
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公开(公告)号：US06192265B1
公开(公告)日：2001-02-20
申请号：US09039351
申请日：1998-03-13
IPC分类号： A61B505
CPC分类号： G06T11/005
摘要： The invention relates to an image processing method for improving the signal-to-noise ratio for a series of MR images or CT images which are based on the projection-reconstruction method. First the pixels which reproduce the same sub-structure in the projection images are determined in the one-dimensional projection images constituting the two-dimensional MR or CT images. The image values of these pixels are subjected to noise filtering. Two-dimensional MR images or CT images are reconstructed from the noise filtered one-dimensional projection images.
摘要翻译： 本发明涉及一种用于改善基于投影重建方法的一系列MR图像或CT图像的信噪比的图像处理方法。 首先，在构成二维MR或CT图像的一维投影图像中确定在投影图像中再现相同子结构的像素。 对这些像素的图像值进行噪声滤波。 从噪声滤波的一维投影图像重建二维MR图像或CT图像。
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3.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
CPC分类号： G06T7/38 , G06T7/35 , G06T2207/30004
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。
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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
CPC分类号： A61B5/06 , A61B34/20 , A61B90/10 , A61B90/37 , A61B2034/105 , A61B2034/2051 , A61B2034/2068 , A61B2090/376 , A61B2090/3954 , A61B2090/3983
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。
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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
CPC分类号： A61B6/0457 , A61B6/4441 , A61B6/469 , A61B6/542
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）。
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公开(公告)号：US20090080751A1
公开(公告)日：2009-03-26
申请号：US11576702
申请日：2005-10-06
申请人： Volker Rasche , Roland Proksa
发明人： Volker Rasche , Roland Proksa
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。
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7.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
CPC分类号： G06T7/38 , G06T7/35 , G06T2207/30004
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。
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公开(公告)号：US20060267579A1
公开(公告)日：2006-11-30
申请号：US10553771
申请日：2004-04-14
申请人： Joern Borgert , Volker Rasche
发明人： Joern Borgert , Volker Rasche
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。
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9.发明授权X-ray imaging method and a 3D-rotational X-ray apparatus for applying this method 失效X射线成像方法和应用该方法的3D旋转X射线装置公开(公告)号：US06959067B2
公开(公告)日：2005-10-25
申请号：US10022383
申请日：2001-10-30
IPC分类号： A61B6/00
摘要： An X-ray imaging method comprises forming 2-dimensional X-ray images of an object to be examined, for example the coronary vascular system of a patient, and reconstruction of a 3-dimensional volume thereof. With a relatively long run length of a scan rotation over substantially 180° of at least 15 sec. and preferably about 20 sec. A sufficient number of images is obtained to perform a more accurate volume reconstruction. This reconstruction method may be combined with existing modelling techniques.
摘要翻译： X射线成像方法包括形成待检查对象的2维X射线图像，例如患者的冠状血管系统，以及其3维体积的重建。 具有在大约180°至少15秒的扫描旋转的相对较长的行程长度。 优选约20秒。 获得足够数量的图像以执行更精确的体积重建。 这种重建方法可以与现有的建模技术相结合。
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公开(公告)号：US20050185831A1
公开(公告)日：2005-08-25
申请号：US10516151
申请日：2003-05-21
申请人： Volker Rasche , Babak Movassaghi , Michael Grass
发明人： Volker Rasche , Babak Movassaghi , Michael Grass
CPC分类号： G06T7/60 , G06T7/593 , G06T2207/30101 , Y10S128/922
摘要： A method is provided for analysis of a multi-dimensional structure which includes a tubular structure from two-dimensional datasets for respective pre-determined projection directions. A pair of corresponding initial projected centre points of the tubular structure is identified in two respective initial and further two-dimensional datasets. Projected edges of the tubular structure in said initial two-dimensional datasets and in said further two-dimensional dataset near the respective projected centre points are identified. A local size of the tubular strucwur is derived at the three-dimensional spatial position of the centre point of the tubular structure from said projected edges and the predetermined projection directions.
摘要翻译： 提供了一种用于分析多维结构的方法，其包括用于各个预定投影方向的二维数据集的管状结构。 在两个相应的初始和进一步的二维数据集中识别管状结构的一对相应的初始投影中心点。 识别所述初始二维数据集中的所述管状结构的投影边缘和在相应的投影中心点附近的所述另外的二维数据集中。 在管状结构的中心点从所述投影边缘和预定投影方向的三维空间位置导出管状结构的局部尺寸。
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