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47 条记录 (耗时 0.021 秒)

    Correction of truncations in MR imaging
    1.
    发明授权
    Correction of truncations in MR imaging 失效
    MR成像中截肢的修正

    公开(公告)号：US08638095B2

    公开(公告)日：2014-01-28

    申请号：US12893140

    申请日：2010-09-29

    申请人： Matthias Fenchel ,  Stefan Popescu

    发明人： Matthias Fenchel ,  Stefan Popescu

    IPC分类号： G01V3/00

    CPC分类号： G01R33/481 ,  A61B6/037 ,  A61B6/4417 ,  A61B6/5247

    摘要： A method is disclosed for correction of truncations of a magnetic resonance image of an object under examination in the reconstruction of image data from raw data. In at least one embodiment, the method includes determining a number of one-dimensional projections of imaged field of view in the Radon space from the raw data in order to obtain a projection profile; checking each projection profile for whether the projection profile exhibits a truncation; if the respective checked projection profile exhibits a truncation, expanding the projection profile for correcting the truncation in that the projection profile is extrapolated in accordance with a predetermined extrapolation model in the area in which it exhibits the truncation; and reconstructing image data based on the expanded projection profiles in which the truncation of the image of the object under examination is corrected.

    摘要翻译： 公开了一种用于在从原始数据重建图像数据中校正被检查物体的磁共振图像的截断的方法。 在至少一个实施例中，该方法包括从原始数据确定Radon空间中的成像视场的一维投影的数量，以便获得投影轮廓; 检查每个投影轮廓以确定投影轮廓是否显示截断; 如果相应的检查的投影轮廓呈现截断，则扩展用于校正截断的投影轮廓，因为根据在其展现截断的区域中的预定外推模型外推投影轮廓; 以及基于扩大的投影轮廓重建图像数据，其中校正被检查物体的图像的截断。

    CORRECTION OF TRUNCATIONS IN MR IMAGING
    2.
    发明申请
    CORRECTION OF TRUNCATIONS IN MR IMAGING 失效
    矫正MR成像中的交叉

    公开(公告)号：US20110080168A1

    公开(公告)日：2011-04-07

    申请号：US12893140

    申请日：2010-09-29

    申请人： Matthias Fenchel ,  Stefan Popescu

    发明人： Matthias Fenchel ,  Stefan Popescu

    IPC分类号： G01R33/48

    CPC分类号： G01R33/481 ,  A61B6/037 ,  A61B6/4417 ,  A61B6/5247

    摘要： A method is disclosed for correction of truncations of an image of an object under examination in the reconstruction of image data from raw data which has been recorded with a magnetic resonance system from a field of view of the magnetic resonance system, with an object under examination which is located in the field of view of the magnetic resonance system being imaged in the raw data, and with the image recorded by the raw data of the object under examination being truncated at the edge of the field of view if at least one part of the object under examination is located outside the field of view. In at least one embodiment, the method includes determining a number of one-dimensional projections of the imaged field of view in the Radon space from the recorded raw data in order to obtain a projection profile of the image object under examination over the field of view in each case; checking each projection profile for whether the projection profile exhibits a truncation which is caused by the at least one part of the object under examination being located outside the field of view; if the respective checked projection profile exhibits a truncation, expanding the projection profile for correcting the truncation in that the projection profile is extrapolated in accordance with a predetermined extrapolation model in the area in which it exhibits the truncation; and reconstructing image data based on the expanded projection profiles in which the truncation of the image of the object under examination is corrected.

    摘要翻译： 公开了一种用于在从磁共振系统的视野记录的原始数据重建图像数据的重建中校正检查对象的截断的方法，其中检查对象 其位于在原始数据中被成像的磁共振系统的视场中，并且由被检查对象的原始数据记录的图像在视场的边缘被截断，如果至少一部分 被检查对象位于视野外。 在至少一个实施例中，该方法包括从记录的原始数据确定Radon空间中的成像视场的一维投影的数量，以便在视场中获得被检查的图像对象的投影轮廓 在每种情况下 检查每个投影轮廓以确定投影轮廓是否显示由被检查物体的至少一部分位于视场之外引起的截断; 如果相应的检查的投影轮廓呈现截断，则扩展用于校正截断的投影轮廓，因为根据在其展现截断的区域中的预定外推模型外推投影轮廓; 以及基于扩大的投影轮廓重建图像数据，其中校正被检查物体的图像的截断。

    METHOD AND MAGNETIC RESONANCE SYSTEM FOR IMAGING A PARTIAL REGION OF AN EXAMINATION SUBJECT
    5.
    发明申请
    METHOD AND MAGNETIC RESONANCE SYSTEM FOR IMAGING A PARTIAL REGION OF AN EXAMINATION SUBJECT 有权
    用于成像检查对象的部分区域的方法和磁共振系统

    公开(公告)号：US20130057282A1

    公开(公告)日：2013-03-07

    申请号：US13606398

    申请日：2012-09-07

    申请人： Jan Ole Blumhagen ,  Matthias Fenchel ,  Ralf Ladebeck

    发明人： Jan Ole Blumhagen ,  Matthias Fenchel ,  Ralf Ladebeck

    IPC分类号： G01R33/565 ,  G01R33/341

    CPC分类号： G01R33/56563 ,  A61B5/055 ,  G01R33/481 ,  G01R33/56572

    摘要： In a method and magnetic resonance (MR) apparatus to image a partial region of an examination subject by means of a multislice measurement, which partial region includes at least two measurement slices, and is located at least in part at the edge of a field of view of the magnetic resonance apparatus, for each voxel to be optimized that is located at the edge of the field of view, a gradient field is configured for each measurement slice of the partial region that is to be measured and is used to acquire magnetic resonance data in the multislice measurement. The gradient field is configured so as to cause a nonlinearity of the gradient field and a B0 field inhomogeneity to cancel at each of the aforementioned voxel to be optimized at the partial region at the edge of the field of view. An image of the partial region of the examination subject is determined from the magnetic resonance data acquired in this manner.

    摘要翻译： 在一种方法和磁共振（MR）装置中，通过多层测量对检查对象的部分区域进行成像，该部分区域包括至少两个测量切片，并且至少部分地位于 对于磁共振设备的视图，对于要被优化的位于视场边缘的每个体素，配置用于待测量的部分区域的每个测量片并用于获取磁共振的梯度场 多层测量中的数据。 梯度场被配置为使得梯度场的非线性和B0场不均匀性在每个上述体素处被消除以在视场的边缘处的部分区域被优化。 从以这种方式获取的磁共振数据确定检查对象的部分区域的图像。

    Method for controlling the acquisition and/or evaluation operation of image data in medical examinations
    6.
    发明授权
    Method for controlling the acquisition and/or evaluation operation of image data in medical examinations 有权
    用于控制医学检查中图像数据的获取和/或评估操作的方法

    公开(公告)号：US07899227B2

    公开(公告)日：2011-03-01

    申请号：US11736674

    申请日：2007-04-18

    申请人： Matthias Fenchel ,  Andreas Schilling ,  Stefan Thesen

    发明人： Matthias Fenchel ,  Andreas Schilling ,  Stefan Thesen

    IPC分类号： G06K9/00

    CPC分类号： G06K9/00 ,  G06F19/00 ,  G06F19/321 ,  G06K9/20 ,  G06K2209/051

    摘要： In a method for controlling the acquisition and/or evaluation operation of image data in medical examinations, using a statistical model of the target volume based on data about real anatomy, spatial information (in particular position, orientation and shape) of the target volume are automatically determined in a previously-acquired planning image data set wholly or partially showing a target volume, and the acquisition and/or evaluation operation is controlled using the spatial information.

    摘要翻译： 在用于控制医学检查中的图像数据的获取和/或评估操作的方法中，使用基于关于真实解剖结构的数据的目标体积的统计模型，目标体积的空间信息（特别是位置，取向和形状）是 在先前获得的完全或部分地示出目标体积的计划图像数据集中自动确定，并且使用空间信息来控制获取和/或评估操作。

    ASCERTAINING AN ITEM OF MOVEMENT INFORMATION DESCRIBING A MOVEMENT IN AN AT LEAST PARTIALLY MOVED EXAMINATION REGION
    8.
    发明申请
    ASCERTAINING AN ITEM OF MOVEMENT INFORMATION DESCRIBING A MOVEMENT IN AN AT LEAST PARTIALLY MOVED EXAMINATION REGION 审中-公开

    公开(公告)号：US20170160364A1

    公开(公告)日：2017-06-08

    申请号：US15367358

    申请日：2016-12-02

    申请人： Matthias Fenchel ,  Peter Speier

    发明人： Matthias Fenchel ,  Peter Speier

    IPC分类号： G01R33/567

    CPC分类号： G01R33/5673 ,  G01R33/56308 ,  G01R33/5676

    摘要： A method is provided for ascertaining at least one item of movement information describing a sought movement as a partial movement of an overall movement in an at least partially moved examination region. In the method, at least one excitation signal having a first frequency band is output and receiving signals generated by the excitation signal are recorded with a receiving coil arrangement, (e.g., a receiving coil arrangement of a magnetic resonance device), having a plurality of receiving channels. The coils of the receiving coil arrangement are designed to record a receiving frequency band including the first frequency band, wherein for ascertaining the movement information the complex receiving signals of the receiving channels are combined at one instant according to a combination specification ascertained over a period by an analysis of the receiving signals that identifies at least one component of a movement that contributes to the sought movement.

    Magnetic resonance system and method to generate a magnetic resonance image of an examination subject
    9.
    发明授权
    Magnetic resonance system and method to generate a magnetic resonance image of an examination subject 有权
    用于产生检查对象的磁共振图像的磁共振系统和方法

    公开(公告)号：US09297871B2

    公开(公告)日：2016-03-29

    申请号：US13714837

    申请日：2012-12-14

    申请人： Kai Tobias Block ,  Matthias Fenchel

    发明人： Kai Tobias Block ,  Matthias Fenchel

    IPC分类号： G01V3/00 ,  G01R33/48 ,  G06F17/40 ,  G01R33/483 ,  G01R33/565 ,  G01R33/3415

    CPC分类号： G01R33/48 ,  G01R33/3415 ,  G01R33/4816 ,  G01R33/4824 ,  G01R33/4838 ,  G01R33/56545 ,  G06F17/40

    摘要： The invention concerns a method to generate an MR image of an examination subject of MR signals of the examination subject being detected with a receiver coil element of a magnetic resonance system. A spatially related sensitivity is determined for the receiver coil element. A mask is generated for the receiver coil element depending on the sensitivity of the receiver coil element in order to therewith mask a region of the MR image, in which region the receiver coil element has at least one predetermined sensitivity. At least one RF excitation pulse and at least one magnetic field gradient are activated to acquire MR data with the receiver coil element, and a preliminary MR image is generated depending on MR data acquired therewith. The mask of the receiver coil element is applied to the preliminary MR image in order to generate an MR image of the receiver coil element, and an MR image of the examination subject is generated from the MR image for the receiver coil element.

    摘要翻译： 本发明涉及一种利用磁共振系统的接收器线圈元件检测检查对象的MR信号的检查对象的MR图像的方法。 确定接收器线圈元件的空间相关灵敏度。 根据接收器线圈元件的灵敏度，为接收器线圈元件产生掩模，以便掩蔽MR图像的区域，其中接收器线圈元件具有至少一个预定灵敏度。 至少一个RF激励脉冲和至少一个磁场梯度被激活以用接收器线圈元件获取MR数据，并且根据由其获取的MR数据来生成初步MR图像。 将接收器线圈元件的掩模施加到初步MR图像，以便产生接收器线圈元件的MR图像，并且从用于接收器线圈元件的MR图像生成检查对象的MR图像。

    Determining a position of a subarea of an object under examination and the structure thereof in a magnetic resonance system
    10.
    发明授权
    Determining a position of a subarea of an object under examination and the structure thereof in a magnetic resonance system 有权
    确定被检查物体的子区域的位置及其在磁共振系统中的结构

    公开(公告)号：US08648595B2

    公开(公告)日：2014-02-11

    申请号：US13015065

    申请日：2011-01-27

    申请人： Jan Ole Blumhagen ,  Matthias Fenchel ,  Ralf Ladebeck

    发明人： Jan Ole Blumhagen ,  Matthias Fenchel ,  Ralf Ladebeck

    IPC分类号： G01V3/00

    CPC分类号： G01R33/481 ,  G01R33/56563

    摘要： A method is disclosed for determining a location of a subarea of an area under examination in a magnetic resonance system. The subarea is arranged at the edge of a field-of-view of the magnetic resonance system. In at least one embodiment of the method, at least one slice position is determined for an MR image in which the B0 field at the edge of the MR image satisfies a homogeneity value. For the slice position determined an MR image is acquired which contains the subarea at the edge of the field-of-view and the location of the subarea of the object under examination is determined through the location of the subarea in the MR image.

    摘要翻译： 公开了一种用于确定磁共振系统中被检查区域的子区域的位置的方法。 子区域布置在磁共振系统的视野的边缘。 在该方法的至少一个实施例中，为MR图像确定至少一个切片位置，其中MR图像边缘处的B0场满足均匀性值。 对于确定的切片位置，获取包含在视场边缘处的子区域的MR图像，并且通过MR图像中的子区域的位置来确定被检查对象的子区域的位置。