Diagnostic image processing method
    51.
    发明授权
    Diagnostic image processing method 失效
    诊断图像处理方法

    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。

    MR method and MR device for implementing the method
    52.
    发明授权
    MR method and MR device for implementing the method 失效
    MR方法和MR装置实现该方法

    公开(公告)号:US5644234A

    公开(公告)日:1997-07-01

    申请号:US610024

    申请日:1996-03-04

    摘要: A MR method determines nuclear magnetic resonance distribution in an examination area and the position of at least one microcoil which is located in the examination area in or on an examination object. In the presence of a homogeneous stationary magnetic field acting on the examination area, sequences are carried out in which at least one high-frequency pulse acting on the examination area is generated, and after the high-frequency pulse an MR signal induced in the microcoil is detected under the influence of a gradient magnetic field that acts on the examination area. Then the position of the microcoil in the gradient direction defined by the gradient field is derived from the detected MR signal. The aforementioned sequences are repeated for another gradient direction, and MR signals are detected by a further receiving coil arrangement to determine the nuclear distribution. Without additional measuring sequences, a position is detected in a manner that the sequences are continuously repeated while the gradient direction is varied, and that the position of the microcoil and the nuclear magnetic distribution are derived from MR signals detected simultaneously by the microcoil and the receiving coil arrangement.

    摘要翻译: MR方法确定检查区域中的核磁共振分布和位于检查对象中或检查对象上的检查区域中的至少一个微线圈的位置。 在作用于检查区域的均匀静止磁场存在的情况下,执行序列,其中产生至少一个作用在检查区域的高频脉冲,并且在高频脉冲之后,在微线圈中感应MR信号 在作用于检查区域的梯度磁场的影响下检测。 然后从检测到的MR信号导出由梯度场定义的梯度方向上的微线圈的位置。 对于另一个梯度方向重复上述序列,并且通过另外的接收线圈装置检测MR信号以确定核分布。 没有附加的测量序列,以梯度方向改变连续重复序列的方式检测位置,并且微线圈和核磁分布的位置是从由微线圈和接收器同时检测到的MR信号导出的 线圈排列。

    Method of forming a series of MR images, and device for carrying out the
method
    53.
    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。

    Visualization for navigation guidance
    54.
    发明授权
    Visualization for navigation guidance 有权
    可视化导航指导

    公开(公告)号:US09554728B2

    公开(公告)日:2017-01-31

    申请号:US14002368

    申请日:2012-03-01

    摘要: The present invention relates to visualizing information of an object. In order to provide spatial information and in addition situation specific data to the user while ensuring an effective perceptibility, a method (110) is provided comprising the steps of: a) providing (112) pre-navigation data (114) of a region of interest of an object (22); wherein the pre-navigation data comprises spatial geometrical data (116) and a functional parameter surface (118) in correspondence to the spatial geometrical data; b) acquiring (120) live image data (122) of the region of interest; c) detecting (124) an element (126) in the live image data; d) determining (128) spatial relation (130) of the pre-navigation data and the live image data; e) determining (132)the position (134) of the detected element in the spatial geometrical data, which determining is based on the spatial relation, and computing (136) a predetermined related point of location (138) on the functional parameter surface; f) generating (140) a combination (142) of a simplified surface representation (144) of the region of interest, which simplified surface representation is based on a visualization of the functional parameter surface, and a marker (146) indicating the computed predetermined related point of location; and g) displaying (148) the combination as navigation guidance (150).

    摘要翻译: 本发明涉及可视化对象的信息。 为了在确保有效的可感知性的同时向用户提供空间信息和附加情况特定数据,提供了一种方法(110),包括以下步骤:a)提供(112)前导数据(114) 物体(22)的兴趣; 其中所述预导数据包括对应于所述空间几何数据的空间几何数据(116)和功能参数表面(118); b)获取(120)感兴趣区域的实时图像数据(122); c)在实况图像数据中检测(124)元素(126); d)确定(128)前导数据和实时图像数据的空间关系(130); e)确定(132)在所述空间几何数据中检测到的元素的位置(134),所述空间几何数据基于所述空间关系确定,并且计算(136)所述功能参数表面上的预定相关位置点(138); f)产生(140)所述感兴趣区域的简化表面表示(144)的组合(142),所述简化表面表示基于所述功能参数表面的可视化,以及指示所计算的预定 相关点位置; 以及g)将所述组合显示(148)作为导航指导(150)。

    Magnetic field unit of an MRT system for image capturing a head region
    55.
    发明授权
    Magnetic field unit of an MRT system for image capturing a head region 有权
    用于图像捕获头部区域的MRT系统的磁场单元

    公开(公告)号:US08847597B2

    公开(公告)日:2014-09-30

    申请号:US13376066

    申请日:2010-06-23

    摘要: A magnetic field unit of an MRT system for image capturing a head region as the region to be recorded, comprising at least one permanent magnet for generating a main magnetic field, a device for generating a gradient field, and at least one coil for generating and receiving radio frequencies. The magnetic field unit is fastened to a mounting such that a longitudinal axis of the magnetic field unit, together with a vertically extending axis, forms an angle of no more than +45 degrees, and the magnetic field unit and the patient can be adjusted relative to each other such that the magnetic field unit can be moved to a position surrounding the head of the patient.

    摘要翻译: 用于图像捕获头区域作为待记录区域的MRT系统的磁场单元,包括至少一个用于产生主磁场的永磁体,用于产生梯度场的装置,以及用于产生和/ 接收射频。 磁场单元被紧固到安装件,使得磁场单元的纵向轴线与垂直延伸的轴线形成不超过+45度的角度,并且可以相对于磁场单元和患者进行相对调整 使得磁场单元可以移动到围绕患者头部的位置。

    VISUALIZATION FOR NAVIGATION GUIDANCE
    56.
    发明申请
    VISUALIZATION FOR NAVIGATION GUIDANCE 有权
    可视化导航指导

    公开(公告)号:US20130336558A1

    公开(公告)日:2013-12-19

    申请号:US14002368

    申请日:2012-03-01

    IPC分类号: A61B5/06

    摘要: The present invention relates to visualizing information of an object. In order to provide spatial information and in addition situation specific data to the user while ensuring an effective perceptibility, a method (110) is provided comprising the steps of: a) providing (112) pre-navigation data (114) spatial geometrical data (116) and a functional parameter surface (118) of a region of interest of an object (22); wherein the pre-navigation data comprises in correspondence to the spatial geometrical data; b) acquiring (120) live image data (122) of the region of interest; c) detecting (124) an element (126) in the live image data; d) determining (128) spatial relation (130) of the pre-navigation data and the live image data; e) determining (132)the position (134) of the detected element in the spatial geometrical data, which determining is based on the spatial relation, and computing (136) a predetermined related point of location (138) on the functional parameter surface; f) generating (140) a combination (142) of a simplified surface representation (144) of the region of interest, which simplified surface representation is based on a visualization of the functional parameter surface, and a marker (146) indicating the computed predetermined related point of location; and g) displaying (148) the combination as navigation guidance (150).

    摘要翻译: 本发明涉及可视化对象的信息。 为了在确保有效的感知性的同时向用户提供空间信息和附加情况特定数据,提供了一种方法(110),包括以下步骤:a)提供(112)预导数据(114)空间几何数据 116)和物体(22)的感兴趣区域的功能参数表面(118); 其中所述预导数据包括对应于所述空间几何数据; b)获取(120)感兴趣区域的实时图像数据(122); c)在实况图像数据中检测(124)元素(126); d)确定(128)前导数据和实时图像数据的空间关系(130); e)确定(132)在所述空间几何数据中检测到的元素的位置(134),所述空间几何数据基于所述空间关系确定,并且计算(136)所述功能参数表面上的预定相关位置点(138); f)产生(140)所述感兴趣区域的简化表面表示(144)的组合(142),所述简化表面表示基于所述功能参数表面的可视化,以及指示所计算的预定 相关点位置; 以及g)将所述组合显示(148)作为导航指导(150)。

    Imaging system for the generation of high-quality X-ray projections
    58.
    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。

    Three-dimensional reconstruction of an object from projection photographs
    59.
    发明授权
    Three-dimensional reconstruction of an object from projection photographs 有权
    投影照片对象的三维重建

    公开(公告)号:US08098919B2

    公开(公告)日:2012-01-17

    申请号:US10595875

    申请日:2004-11-16

    IPC分类号: G06K9/00

    摘要: A method for the three-dimensional reconstruction of an object, or its surroundings, in a moving body volume of a patient includes obtaining a series of X-ray projection photographs produced from different directions, with a relevant ECG phase or respiration being recorded simultaneously. Projection photographs of the moving body volume are transformed such that the images of feature points that are located on the projection photographs respectively come to rest at a place on which randomly set spatial reference positions for the feature points are projected. With the projection photographs aligned onto the reference positions, three-dimensional reconstruction of the object can subsequently take place.

    摘要翻译: 用于在患者的移动体体积中对象或其周围的三维重建的方法包括获得从不同方向产生的一系列X射线投影照片,同时记录相关ECG阶段或呼吸。 变换运动体积的投影照片,使得位于投影照片上的特征点的图像分别在特征点的随机设置的空间参考位置被投影的地方休息。 随着投影照片对准到参考位置,随后可以进行物体的三维重建。