公开(公告)号：US20110080168A1

公开(公告)日：2011-04-07

申请号：US12893140

申请日：2010-09-29

Applicant: Matthias Fenchel ,  Stefan Popescu

Inventor： Matthias Fenchel ,  Stefan Popescu

IPC: G01R33/48

CPC classification number: G01R33/481 ,  A61B6/037 ,  A61B6/4417 ,  A61B6/5247

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20170160367A1

公开(公告)日：2017-06-08

申请号：US15368607

申请日：2016-12-03

Applicant: Steffen Schröter ,  Jan Bollenbeck ,  Matthias Fenchel ,  Peter Speier ,  Markus Vester

Inventor： Steffen Schröter ,  Jan Bollenbeck ,  Matthias Fenchel ,  Peter Speier ,  Markus Vester

IPC: G01R33/565 ,  G01R33/36

CPC classification number: G01R33/56509 ,  G01R33/3607 ,  G01R33/3614 ,  G01R33/3657 ,  G01R33/3692

Abstract: A transmitter for pilot tone navigation in a magnetic resonance tomography system includes a power supply and an antenna. The transmitter is configured to transmit a pilot tone signal via the antenna. The transmitter also includes a decoupling element in order to protect a transmitter output from signals that the antenna receives with excitation pulses of the magnetic resonance tomography system during a magnetic resonance tomography. In a method, movement-dependent changes to the pilot tone signal of the transmitter are identified by a controller of the magnetic resonance tomography system.

公开(公告)号：US20170160364A1

公开(公告)日：2017-06-08

申请号：US15367358

申请日：2016-12-02

Applicant: Matthias Fenchel ,  Peter Speier

Inventor： Matthias Fenchel ,  Peter Speier

IPC: G01R33/567

CPC classification number: G01R33/5673 ,  G01R33/56308 ,  G01R33/5676

Abstract: 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.

公开(公告)号：US09297871B2

公开(公告)日：2016-03-29

申请号：US13714837

申请日：2012-12-14

Applicant: Kai Tobias Block ,  Matthias Fenchel

Inventor： Kai Tobias Block ,  Matthias Fenchel

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

CPC classification number: G01R33/48 ,  G01R33/3415 ,  G01R33/4816 ,  G01R33/4824 ,  G01R33/4838 ,  G01R33/56545 ,  G06F17/40

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US08648595B2

公开(公告)日：2014-02-11

申请号：US13015065

申请日：2011-01-27

Applicant: Jan Ole Blumhagen ,  Matthias Fenchel ,  Ralf Ladebeck

Inventor： Jan Ole Blumhagen ,  Matthias Fenchel ,  Ralf Ladebeck

IPC: G01V3/00

CPC classification number: G01R33/481 ,  G01R33/56563

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US08638095B2

公开(公告)日：2014-01-28

申请号：US12893140

申请日：2010-09-29

Applicant: Matthias Fenchel ,  Stefan Popescu

Inventor： Matthias Fenchel ,  Stefan Popescu

IPC: G01V3/00

CPC classification number: G01R33/481 ,  A61B6/037 ,  A61B6/4417 ,  A61B6/5247

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20130197349A1

公开(公告)日：2013-08-01

申请号：US13747756

申请日：2013-01-23

Applicant: Jan Ole BLUMHAGEN ,  Matthias FENCHEL ,  Ralf LADEBECK

Inventor： Jan Ole BLUMHAGEN ,  Matthias FENCHEL ,  Ralf LADEBECK

IPC: A61B6/00 ,  A61B6/03 ,  A61B5/055 ,  A61B5/00

CPC classification number: A61B6/5247 ,  A61B5/0035 ,  A61B5/0037 ,  A61B5/055 ,  A61B5/0555 ,  A61B5/4872 ,  A61B5/4875 ,  A61B5/72 ,  A61B6/037 ,  A61B6/4417 ,  A61B6/463 ,  A61B6/466 ,  A61B6/5217 ,  G01R33/481

Abstract: A method is disclosed for calculating a spatially resolved value of an absorption parameter for a positron emission tomography (PET) scan of an examination object via magnetic resonance tomography (MRT). Magnetic resonance data is acquired within a first region lying within a field of view of a magnetic resonance system and within a second region bordering on the first and lying at the edge of the field of view. The method includes the spatially resolved calculation of a first value of the absorption parameter from the first MR data within the first region and of a second value from the second MR data within the second region. A three-dimensional parameter map is obtained from the first value. This parameter map is extended by the second value such that within the first region and the second region the parameter map has the value of the absorption parameter in spatially resolved form.

Abstract translation: 公开了一种用于通过磁共振断层摄影（MRT）计算检查对象的正电子发射断层摄影（PET）扫描的吸收参数的空间分辨值的方法。 磁共振数据在位于磁共振系统的视野内的第一区域内并且在与第一区域接合并位于视野边缘的第二区域内获取。 该方法包括从第一区域内的第一MR数据和第二区域内的第二MR数据的第二值的空间分辨计算吸收参数的第一值。 从第一个值获得三维参数图。 该参数图被扩展第二值，使得在第一区域和第二区域内参数图具有空间分辨形式的吸收参数的值。

公开(公告)号：US20130154640A1

公开(公告)日：2013-06-20

申请号：US13714837

申请日：2012-12-14

Applicant: Kai Tobias Block ,  Matthias Fenchel

Inventor： Kai Tobias Block ,  Matthias Fenchel

IPC: G01R33/48 ,  G06F17/40

CPC classification number: G01R33/48 ,  G01R33/3415 ,  G01R33/4816 ,  G01R33/4824 ,  G01R33/4838 ,  G01R33/56545 ,  G06F17/40

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20130082702A1

公开(公告)日：2013-04-04

申请号：US13628938

申请日：2012-09-27

Applicant: Jan Ole BLUMHAGEN ,  Matthias FENCHEL ,  Ralf LADEBECK ,  Harald H. QUICK

Inventor： Jan Ole BLUMHAGEN ,  Matthias FENCHEL ,  Ralf LADEBECK ,  Harald H. QUICK

IPC: G01R33/565 ,  G01R33/34

CPC classification number: G01R33/56563 ,  G01R33/481 ,  G01R33/4835 ,  G01R33/56383

Abstract: A method is disclosed for acquiring magnetic resonance (MR) data for a plurality of layers of an object to be examined in a section of a magnetic resonance system having a basic magnetic field, wherein the section is located at the edge of a Field of View of the magnetic resonance system in the first direction. The method includes producing a first gradient field having a non-linearity of its location dependence in such a way that in the section the non-linearity compensates a local inhomogeneity of the basic magnetic field, and then multiple positioning of the object to be examined in a first direction, so the plurality of layers of the object to be examined perpendicular to the first direction successively includes the section. Finally, it includes the acquisition of magnetic resonance data for each of the layers with recording sequences.

Abstract translation: 公开了一种用于在具有基本磁场的磁共振系统的一部分中获取待检查对象的多层的磁共振（MR）数据的方法，其中该部分位于视场边缘 的磁共振系统在第一方向上。 该方法包括以这样的方式产生具有其位置依赖性的非线性的第一梯度场，使得在该截面中非线性补偿基本磁场的局部不均匀性，然后将被检查对象多次定位 第一方向，因此垂直于第一方向的要被检查物体的多层依次包括该部分。 最后，它包括用记录序列获取每个层的磁共振数据。

公开(公告)号：US20120249141A1

公开(公告)日：2012-10-04

申请号：US13433972

申请日：2012-03-29

Applicant: Jan Ole Blumhagen ,  Matthias Fenchel ,  Ralf Ladebeck

Inventor： Jan Ole Blumhagen ,  Matthias Fenchel ,  Ralf Ladebeck

IPC: G01R33/565 ,  G01R33/34

CPC classification number: G01R33/56563 ,  G01R33/481 ,  G01R33/56572

Abstract: A method is disclosed for correcting a distortion in a magnetic resonance recording. A distortion indicates a mismatch between a distorted position of an image point in the magnetic resonance recording and an actual position of the image point. According to at least one embodiment of the method, a B0 field deviation and a gradient field deviation are determined for at least one actual position in the magnetic resonance facility. Furthermore, a magnetic resonance recording of an examination object is captured and the actual position of an image point of the magnetic resonance recording is determined as a function of the distorted position of the image point in the magnetic resonance recording, the B0 field deviation at the actual position and the gradient field deviation at the actual position.

Abstract translation: 公开了一种用于校正磁共振记录中的失真的方法。 失真表示磁共振记录中的图像点的失真位置与图像点的实际位置之间的失配。 根据该方法的至少一个实施例，为磁共振设备中​​的至少一个实际位置确定B0场偏移和梯度场偏差。 此外，拍摄检查对象的磁共振记录，并且磁共振记录的图像点的实际位置被确定为磁共振记录中的图像点的失真位置的函数，则在 实际位置和实际位置的梯度场偏差。