公开(公告)号：US10321853B2

公开(公告)日：2019-06-18

申请号：US15409759

申请日：2017-01-19

申请人： Gerhard Brinker ,  Franz Hebrank ,  Patrick Sieber

发明人： Gerhard Brinker ,  Franz Hebrank ,  Patrick Sieber

IPC分类号： A61B5/055 ,  A61B5/107 ,  G01R33/28 ,  G16H40/63

摘要： A method for evaluating positioning of an examination object on a patient-positioning apparatus in a magnetic resonance unit, a magnetic resonance unit, and a computer program product are provided. The method includes acquiring positioning data relating to the examination object using an acquisition unit. Using the acquired positioning data, positioning information relating to the examination object is determined using an analysis unit. Evaluation information is determined using the positioning information, using an evaluation unit. Using the evaluation information, an evaluation signal is transmitted using an output unit. Monitoring of a specific absorption rate may be adjusted using the evaluation signal.

公开(公告)号：US08054079B2

公开(公告)日：2011-11-08

申请号：US12801801

申请日：2010-06-25

申请人： Franz Hebrank ,  Thorsten Speckner ,  Axel vom Endt

发明人： Franz Hebrank ,  Thorsten Speckner ,  Axel vom Endt

IPC分类号： G01V3/00

CPC分类号： G01R33/56518

摘要： In one embodiment a method for processing a reconstruction image is disclosed. The method includes recording the reconstruction image by a magnetic resonance device having a gradient coil to generate a gradient field. The method further includes distortion-correcting the reconstruction image. The method further includes back-transforming the distortion-corrected reconstruction image, by an image processing device, into a distortion-uncorrected reconstruction image, the back-transforming uses an algorithm having a first input value describing a real gradient field given at a real measuring point of the signal.

摘要翻译： 在一个实施例中，公开了一种用于处理重建图像的方法。 该方法包括通过具有梯度线圈的磁共振装置记录重建图像以产生梯度场。 该方法还包括对重建图像进行失真校正。 该方法还包括通过图像处理装置将失真校正的重构图像逆变换为失真未校正的重建图像，反向变换使用具有描述实际测量中给出的实际梯度场的第一输入值的算法 点的信号。

公开(公告)号：US07146033B2

公开(公告)日：2006-12-05

申请号：US10074655

申请日：2002-02-13

申请人： Gerhard Brinker ,  Georg Frese ,  Franz Hebrank

发明人： Gerhard Brinker ,  Georg Frese ,  Franz Hebrank

IPC分类号： G06K9/00

CPC分类号： G06T5/006 ,  G01R33/56572

摘要： In a the method for determining distortions in an image that can be generated with an imaging system from a subject arranged in an imaging volume of the imaging system, a first region of the imaging volume is presented undistorted in the image and a second region of the imaging volume is presented distorted in the image. Using the imaging system, an image of at least three markings that have a known spatial position relative to one another is produced. A first and a second of the three markings are arranged in the first region and a third of the three markings is arranged in the second region. The position of the imaged markings in the image is determined. An ideal position of the third marking in the image is determined from its known spatial arrangement with respect to the first and second markings. A positional difference of the imaged third marking from its ideal position is identified. The positional difference represents a criterion for the distortion.

公开(公告)号：US20150219733A1

公开(公告)日：2015-08-06

申请号：US14614210

申请日：2015-02-04

申请人： Mathias Blasche ,  Franz Hebrank ,  Wilfried Schnell

发明人： Mathias Blasche ,  Franz Hebrank ,  Wilfried Schnell

IPC分类号： G01R33/36 ,  G01R33/48

CPC分类号： G01R33/3607 ,  G01R33/3415 ,  G01R33/48 ,  G01R33/543 ,  G01R33/5659

摘要： An RF pulse alignment method for determining transmit scaling factors used in the control of a magnetic resonance system having a number of radiofrequency transmit channels, via which RF pulse trains are transmitted in parallel during operation, is provided. A common reference pulse train is specified for a number of the radiofrequency transmit channels in the course of the control function. A plurality of candidate images of an object that is to be examined are acquired using different candidate sets of transmit scaling factors. Optimal transmit scaling factors with respect to a predefined criterion are selected for each of the radiofrequency transmit channels based on the acquired candidate images.

摘要翻译： 提供了一种RF脉冲对准方法，用于确定在具有多个射频发射信道的磁共振系统的控制中使用的发射缩放因子，在操作期间RF脉冲序列经由该并行传输。 在控制功能的过程中，针对多个射频发送信道指定公共参考脉冲串。 使用不同的候选传输缩放因子集来获取要被检查的对象的多个候选图像。 基于所获取的候选图像，针对每个射频发射信道选择相对于预定标准的最佳发射缩放因子。

公开(公告)号：US07603157B2

公开(公告)日：2009-10-13

申请号：US10921583

申请日：2004-08-19

申请人： Thorsten Feiweier ,  Franz Hebrank

发明人： Thorsten Feiweier ,  Franz Hebrank

IPC分类号： A61B5/05

CPC分类号： G01R33/5659

摘要： In a method and magnetic resonance apparatus for compensation of contrast inhomogeneities in magnetic resonance images caused by spatial distributions of the radio frequency field associated with the radio frequency pulses that are emitted in order to acquire magnetic resonance (MR) data, multiple individual MR images of a particular region of a subject are recorded with different radio frequency pulse sequences leading to different flip angles. A common contrast-homogenized image for the affected region then is generated based on the different individual images, so that within the contrast-homogenized image, intensity variations due to a distribution of the flip angle are smaller than in the individual images, at least in some areas.

摘要翻译： 在一种方法和磁共振装置中，用于补偿与为了获得磁共振（MR）数据而发射的射频脉冲相关联的射频场的空间分布引起的磁共振图像中的对比度不均匀性， 用不同的射频脉冲序列记录被摄体的特定区域，导致不同的翻转角度。 然后基于不同的单独图像生成受影响区域的常见对比均匀化图像，使得在对比均匀化图像内，由于翻转角分布引起的强度变化小于各个图像中的强度变化，至少在 一些地区。

公开(公告)号：US10126383B2

公开(公告)日：2018-11-13

申请号：US14614210

申请日：2015-02-04

申请人： Mathias Blasche ,  Franz Hebrank ,  Wilfried Schnell

发明人： Mathias Blasche ,  Franz Hebrank ,  Wilfried Schnell

IPC分类号： G01R33/36 ,  G01R33/48 ,  G01R33/565 ,  G01R33/3415 ,  G01R33/54

摘要： An RF pulse alignment method for determining transmit scaling factors used in the control of a magnetic resonance system having a number of radiofrequency transmit channels, via which RF pulse trains are transmitted in parallel during operation, is provided. A common reference pulse train is specified for a number of the radiofrequency transmit channels in the course of the control function. A plurality of candidate images of an object that is to be examined are acquired using different candidate sets of transmit scaling factors. Optimal transmit scaling factors with respect to a predefined criterion are selected for each of the radiofrequency transmit channels based on the acquired candidate images.

公开(公告)号：US20090146657A1

公开(公告)日：2009-06-11

申请号：US11989243

申请日：2006-07-13

申请人： Franz Hebrank ,  Thorsten Speckner ,  Axel vom Endt

发明人： Franz Hebrank ,  Thorsten Speckner ,  Axel vom Endt

IPC分类号： G01R33/565 ,  G06K9/40

CPC分类号： G01R33/56518

摘要： In one embodiment of the present invention, a method for processing a 2D or 3D reconstruction image is disclosed which is recorded by a magnetic resonance device, including a gradient coil that generates a gradient field, and is distortion—corrected with regard to a given non-linearity—leading to an image distortion—of the gradient field using an algorithm that processes the measurement signals at different measurement points lying in the imaging volume, which algorithm, with respect to each signal processed by it, processes the first input value describing the real gradient field given at the real measurement point of the signal, in which method, for inverse transformation of the distortion-corrected reconstruction image into a distortion-uncorrected reconstruction image, use is made of the first algorithm or a second algorithm corresponding to the first algorithm, which, with respect to each signal processed by it, is given as second input value such a value which describes a fictitious gradient field at the respective distorted measurement point at which the processed signal appears, which is increased or decreased by the non-linear field component of the real gradient field compared with the linear ideal gradient field.

摘要翻译： 在本发明的一个实施例中，公开了一种用于处理2D或3D重建图像的方法，其由磁共振装置记录，所述磁共振装置包括产生梯度场的梯度线圈，并且对于给定非对称 - 使用处理在成像体积中的不同测量点处的测量信号的算法，导致梯度场的图像失真，该算法相对于由其处理的每个信号处理描述第一输入值的第一输入值 在该信号的实际测量点处给出的实际梯度场，其中用于将失真校正的重建图像逆变换为失真未校正的重建图像，使用第一算法或对应于第一算法的第二算法 算法，其对于由其处理的每个信号，被给予为第二输入值，例如描述虚构的值 在经过处理的信号出现的相应变形的测量点处，与线性理想梯度场相比，实际梯度场的非线性场分量增加或减小。

公开(公告)号：US20100266186A1

公开(公告)日：2010-10-21

申请号：US12801801

申请日：2010-06-25

申请人： Franz Hebrank ,  Thorsten Speckner

发明人： Franz Hebrank ,  Thorsten Speckner

IPC分类号： G06K9/40 ,  G06K9/00 ,  G01R33/48

CPC分类号： G01R33/56518

摘要： In one embodiment of the present invention, a method for processing a 2D or 3D reconstruction image is disclosed which is recorded by a magnetic resonance device, including a gradient coil that generates a gradient field, and is distortion-corrected with regard to a given non-linearity—leading to an image distortion—of the gradient field using an algorithm that processes the measurement signals at different measurement points lying in the imaging volume, which algorithm, with respect to each signal processed by it, processes the first input value describing the real gradient field given at the real measurement point of the signal, in which method, for inverse transformation of the distortion-corrected reconstruction image into a distortion-uncorrected reconstruction image, use is made of the first algorithm or a second algorithm corresponding to the first algorithm, which, with respect to each signal processed by it, is given as second input value such a value which describes a fictitious gradient field at the respective distorted measurement point at which the processed signal appears, which is increased or decreased by the non-linear field component of the real gradient field compared with the linear ideal gradient field.

摘要翻译： 在本发明的一个实施例中，公开了一种用于处理2D或3D重建图像的方法，其由磁共振装置记录，所述磁共振装置包括产生梯度场的梯度线圈，并且对于给定非对称 - 使用处理在成像体积中的不同测量点处的测量信号的算法，导致梯度场的图像失真，该算法相对于由其处理的每个信号处理描述第一输入值的第一输入值 在该信号的实际测量点处给出的实际梯度场，其中用于将失真校正的重建图像逆变换为失真未校正的重建图像，使用第一算法或对应于第一算法的第二算法 算法，对于由其处理的每个信号，其被给予为第二输入值，例如描述fic的值 在处理的信号出现的各个失真的测量点处，与线性理想梯度场相比，由实际梯度场的非线性场分量增加或减小的倾斜梯度场。

公开(公告)号：US20050083054A1

公开(公告)日：2005-04-21

申请号：US10921583

申请日：2004-08-19

申请人： Thorsten Feiweier ,  Franz Hebrank

发明人： Thorsten Feiweier ,  Franz Hebrank

IPC分类号： G01R33/565 ,  G01V3/00 ,  G06K9/00

CPC分类号： G01R33/5659

摘要： In a method and magnetic resonance apparatus for compensation of contrast inhomogeneities in magnetic resonance images caused by spatial distributions of the radio frequency field associated with the radio frequency pulses that are emitted in order to acquire magnetic resonance (MR) data, multiple individual MR images of a particular region of a subject are recorded with different radio frequency pulse sequences leading to different flip angles. A common contrast-homogenized image for the affected region then is generated based on the different individual images, so that within the contrast-homogenized image, intensity variations due to a distribution of the flip angle are smaller than in the individual images, at least in some areas.

摘要翻译： 在一种方法和磁共振装置中，用于补偿与为了获得磁共振（MR）数据而发射的射频脉冲相关联的射频场的空间分布引起的磁共振图像中的对比度不均匀性， 用不同的射频脉冲序列记录被摄体的特定区域，导致不同的翻转角度。 然后基于不同的单独图像生成受影响区域的常见对比均匀化图像，使得在对比均匀化图像内，由于翻转角分布引起的强度变化小于各个图像中的强度变化，至少在 一些地区。

公开(公告)号：US20170205478A1

公开(公告)日：2017-07-20

申请号：US15409759

申请日：2017-01-19

申请人： Gerhard Brinker ,  Franz Hebrank ,  Patrick Sieber

发明人： Gerhard Brinker ,  Franz Hebrank ,  Patrick Sieber

IPC分类号： G01R33/30 ,  A61B5/107 ,  G01R33/385 ,  A61B5/055 ,  G01B15/00 ,  G01R33/54

CPC分类号： A61B5/1079 ,  A61B5/0555 ,  A61B5/1077 ,  G01R33/283 ,  G16H40/63

摘要： A method for evaluating positioning of an examination object on a patient-positioning apparatus in a magnetic resonance unit, a magnetic resonance unit, and a computer program product are provided. The method includes acquiring positioning data relating to the examination object using an acquisition unit. Using the acquired positioning data, positioning information relating to the examination object is determined using an analysis unit. Evaluation information is determined using the positioning information, using an evaluation unit. Using the evaluation information, an evaluation signal is transmitted using an output unit. Monitoring of a specific absorption rate may be adjusted using the evaluation signal.