公开(公告)号：US20140091797A1

公开(公告)日：2014-04-03

申请号：US14043995

申请日：2013-10-02

申请人： Thorsten Feiweier

发明人： Thorsten Feiweier

IPC分类号： G01R33/54

CPC分类号： G01R33/54 ,  G01R33/56341

摘要： In the acquisition of MR data with diffusion information nuclear spins in a volume segment are excited with radiation of a diffusion coding module and a subsequent diffusion decoding module, and at least one RF pulse is radiated after the excitation, and the MR data are read out. At least one of a time period that defines a time interval between a point in time at which the spin echo condition is satisfied, and the echo time, a first time interval that defines a minimum time interval between the end of the diffusion coding module and the start of the diffusion decoding module, and a second time interval that defines a minimum time interval between the end of the excitation module, and the start of the diffusion coding module, and a third time interval that defines a minimum time interval between the end of the diffusion coding module and the start of the readout of the MR data, is set.

摘要翻译： 在利用扩散信息获取MR数据时，通过扩散编码模块和随后的扩散解码模块的辐射激发体积段中的核自旋，并且在激发之后辐射至少一个RF脉冲，并且读出MR数据 。 定义满足自旋回波条件的时间点与回波时间之间的时间间隔的时间段中的至少一个定义扩散编码模块的末端与最小时间间隔的第一时间间隔， 扩散解码模块的开始，以及定义激励模块的结束与扩散编码模块的开始之间的最小时间间隔的第二时间间隔，以及定义终端之间的最小时间间隔的第三时间间隔 的扩散编码模块和MR数据的读出的开始。

公开(公告)号：US08587293B2

公开(公告)日：2013-11-19

申请号：US12684158

申请日：2010-01-08

申请人： Stephan Biber ,  Thorsten Feiweier ,  Wolfgang Renz

发明人： Stephan Biber ,  Thorsten Feiweier ,  Wolfgang Renz

IPC分类号： G01B7/14 ,  G01B7/30 ,  G01R33/02

CPC分类号： G01R33/3642 ,  G01R33/341

摘要： A simple position determination is enabled by a device and a method to determine the position of a local coil in a magnetic resonance apparatus, wherein at least one signal emitted by at least one transmission coil is received by the local coil and is evaluated with a position determination device in order to determine the position of the local coil.

摘要翻译： 一种简单的位置确定是通过一种装置和方法来实现的，该装置和方法用于确定磁共振装置中局部线圈的位置，其中由至少一个传输线圈发射的至少一个信号由局部线圈接收并且用位置 确定装置，以确定局部线圈的位置。

公开(公告)号：US20120068702A1

公开(公告)日：2012-03-22

申请号：US13231028

申请日：2011-09-13

申请人： Thorsten Feiweier

发明人： Thorsten Feiweier

IPC分类号： G01R33/48

CPC分类号： G01R33/56509 ,  G01R33/4828 ,  G01R33/485 ,  G01R33/56341 ,  G01R33/56366

摘要： In a magnetic resonance method and apparatus, a series of magnetic resonance exposures of an examination subject is generated by implementing multiple first measurements (data acquisitions) with variation of a measurement parameter from acquisition-to-acquisition, which strongly influences a contrast of the first material type excited in the first measurements, implementing multiple second measurements in which a second material type is essentially selectively imaged that is less contrast-dependent with regard to this measurement parameter in a processor calculating spatial correction values for image data of the first measurements based on spatial differences between image data of different second measurements, and, also in the processor, spatially correcting image data of the first measurements (Di) and/or registration of image data of different first measurements to one another on the basis of the correction values.

摘要翻译： 在磁共振方法和装置中，通过采集与获取之间的测量参数的变化实现多次第一测量（数据采集）来产生检查对象的一系列磁共振曝光，这强烈地影响第一 在第一测量中激发的材料类型，实现多个第二测量，其中基本上选择性地成像第二材料类型，其在处理器中对于该测量参数的对比度依赖性较小，该处理器基于第一测量结果计算第一测量的图像数据的空间校正值，基于 基于校正值，不同的第二测量的图像数据之间的空间差异，以及在处理器中，空间校正第一测量（Di）的图像数据和/或不同的第一测量的图像数据的对准。

公开(公告)号：US20110241679A1

公开(公告)日：2011-10-06

申请号：US13076763

申请日：2011-03-31

申请人： Thorsten Feiweier ,  Tony Hyun Kim ,  David Andrew Porter

发明人： Thorsten Feiweier ,  Tony Hyun Kim ,  David Andrew Porter

IPC分类号： G01R33/48

CPC分类号： G01R33/56341 ,  G01R33/4835 ,  G01R33/56518

摘要： In a method and apparatus to reduce distortions in diffusion imaging, at least one first measurement is implemented with a first diffusion weighting for a number of slices that are spatially separated from one another and at least one second measurement is implemented with a second diffusion weighting for the number of slices that are spatially separated from one another. A deskewing function is determined as are correction parameters to deskew diffusion-weighted magnetic resonance images on the basis of the measurements, so that image information and/or correction parameters of different slices are linked with one another. The diffusion-weighted magnetic resonance images are distortion-corrected on the basis of the deskewing function and the correction parameters.

摘要翻译： 在减少扩散成像中的失真的方法和装置中，通过第一扩散加权来实现至少一个第一测量，所述第一扩散加权用于彼此空间上分离的多个片段，并且至少一个第二测量用第二扩散加权来实现， 在空间上彼此分离的切片的数量。 基于测量，确定去偏移功能，作为对偏移扩散加权磁共振图像的校正参数，使得不同切片的图像信息和/或校正参数相互链接。 扩散加权磁共振图像基于去偏置函数和校正参数进行失真校正。

公开(公告)号：US20110085722A1

公开(公告)日：2011-04-14

申请号：US12904312

申请日：2010-10-14

申请人： Thorsten Feiweier

发明人： Thorsten Feiweier

IPC分类号： G06K9/00 ,  G01R33/48

CPC分类号： G01R33/56341 ,  G01R33/5616 ,  G01R33/56518 ,  G01R33/56554

摘要： In a method and magnetic resonance apparatus for correction of image distortions that occur in acquisition of diffusion-weighted magnetic resonance images of an examination subject, a reference image is acquired without diffusion weighting, a first diffusion-weighted image is acquired for a diffusion direction, a second diffusion-weighted image is acquired for the same diffusion direction, with the acquisition of the second diffusion-weighted image taking place at least with a different diffusion weighting or a different diffusion gradient polarity than the acquisition of the first diffusion-weighted image. Distortion parameters for the correction of image distortions in the acquired diffusion-weighted images are acquired, and the first diffusion-weighted image is deskewed with a first set of deskewing parameters, and the second diffusion-weighted image is deskewed with a second set of deskewing parameters. The first set and second set of deskewing parameters are correlated, and the deskewing parameters are determined by simultaneous minimization of differences between the deskewed first image and the reference image and differentiation between the deskewed second image and the reference image.

摘要翻译： 在用于校正在检测对象的扩散加权磁共振图像的获取中发生的图像失真的方法和磁共振装置中，获取参考图像而不进行扩散加权，获得扩散方向的第一扩散加权图像， 对于相同的扩散方向获取第二扩散加权图像，其中第二扩散加权图像的获取至少与不同于第一扩散加权图像的获取的扩散加权或不同的扩散梯度极性发生。 获取用于校正所获取的扩散加权图像中的图像失真的失真参数，并且将第一扩散加权图像与第一组偏斜参数进行去相位校正，并且将第二扩散加权图像与第二组偏斜校正 参数。 第一组和第二组去偏移参数相关，并且通过同时最小化偏斜校正的第一图像和参考图像之间的差异以及在偏斜校正的第二图像与参考图像之间的差异来确定去歪斜参数。

公开(公告)号：US07649353B2

公开(公告)日：2010-01-19

申请号：US11508813

申请日：2006-08-22

申请人： Thorsten Feiweier ,  Razvan Lazar

发明人： Thorsten Feiweier ,  Razvan Lazar

IPC分类号： G01V3/00 ,  A61B5/055

CPC分类号： G01R33/3678 ,  G01R33/288 ,  G01R33/5612 ,  G01R33/5659

摘要： In an MR imaging method and apparatus which MR images with improved signal intensity, improved signal-noise ratio, improved contrast and improved image homogeneity can be acquired, the polarization state of the magnetic field of the RF pulses radiated into the measurement subject and of the resonance signals emitted by the measurement subject are distorted by the interaction with electrically-active materials of the measurement subject. In the transmission branch of the RF system the RF pulses emitted by a transmission coil are pre-distorted with regard to their polarization state. The sensitivity of the reception branch is optimized such that it is capable of detecting resonance signals independent of their polarization state.

摘要翻译： 在可以获得具有改善的信号强度，改善的信噪比，改善的对比度和改进的图像均匀性的MR图像的MR成像方法和装置中，辐射到测量对象中的RF脉冲的磁场的偏振态 由测量对象发射的共振信号通过与测量对象的电活性材料的相互作用而变形。 在RF系统的传输分支中，由发射线圈发射的RF脉冲关于它们的极化状态是预失真的。 接收分支的灵敏度被优化，使得它能够独立于它们的极化状态来检测谐振信号。

公开(公告)号：US07492349B2

公开(公告)日：2009-02-17

申请号：US10123394

申请日：2002-04-16

申请人： Thorsten Feiweier ,  Peter Heubes

发明人： Thorsten Feiweier ,  Peter Heubes

IPC分类号： G09G5/00

CPC分类号： G01R33/56 ,  A61B5/055

摘要： In an apparatus for processing and presenting a magnetic resonance tomography measured image wherein following simultaneous calculation of the contrast images of various spin ensembles or various MR images of a spin ensemble (anatomical, angiographic, functional), a step-free fade of the contrast images can be undertaken with an input device. A multi-colored presentation can be used in addition to the gray scale presentation dependent on the spin ensemble.

公开(公告)号：US20090030304A1

公开(公告)日：2009-01-29

申请号：US12219609

申请日：2008-07-24

申请人： Thorsten Feiweier ,  Diana Martin ,  Gunther Platsch ,  Sebastian Schmidt ,  Kristin Schmiedehausen ,  Michael Szimtenings

发明人： Thorsten Feiweier ,  Diana Martin ,  Gunther Platsch ,  Sebastian Schmidt ,  Kristin Schmiedehausen ,  Michael Szimtenings

IPC分类号： A61B5/055

CPC分类号： A61K49/0004 ,  A61B5/4064 ,  A61B5/4088 ,  A61B6/037 ,  A61B6/5247

摘要： A computerized method is disclosed for detecting a brain region with neurodegenerative change and also a brain region with vascular change in the brain of a patient and also an imaging arrangement suitable for this. In at least one embodiment, the method includes recording a first data record of the brain via positron emission tomography and a second data record of the brain via magnetic resonance imaging; reconstructing a PET image from the first data record and an MRI image from the second data record; identifying evidence for a brain region with vascular change in the MRI image; segmenting the MRI image into gray matter and white matter; identifying a brain region with neurodegenerative change in the PET image; and superposing the PET image and the segmented MRI image to determine whether the brain region with neurodegenerative change is present in gray matter or in white matter, the recording of the first data record and the second data record being carried out in quick succession without repositioning the patient or is even carried out simultaneously.

摘要翻译： 公开了一种用于检测具有神经变性变化的脑区域以及患者脑部血管变化的脑区域的计算机化方法，以及适合于此的成像装置。 在至少一个实施例中，该方法包括通过正电子发射断层摄影和脑的第二数据记录经由磁共振成像记录脑的第一数据记录; 从第一数据记录重建PET图像和从第二数据记录重建MRI图像; 识别MRI图像中具有血管变化的脑区域的证据; 将MRI图像分割成灰质和白质; 识别PET图像中具有神经变性变化的脑区域; 并叠加PET图像和分割的MRI图像，以确定具有神经变性变化的脑区域是否存在于灰质物质或白质中，第一数据记录和第二数据记录的记录被快速连续进行而不重新定位 病人或甚至同时进行。

公开(公告)号：US20070055137A1

公开(公告)日：2007-03-08

申请号：US11510178

申请日：2006-08-25

申请人： Thorsten Feiweier

发明人： Thorsten Feiweier

IPC分类号： A61B5/05

CPC分类号： G01R33/5616 ,  G01R33/56554

摘要： In a method and MRT apparatus for reduction of Nyquist ghosts in medical magnetic resonance imaging given the application of EPI sequences of one or more progression curves with regard to one or more characterizing quantities of the EPI echo, is determined dependent on the echo number of a readout gradient pulse train defined by pulse shape, pulse amplitude and pulse duration, an EPI measurement is implemented with a readout gradient pulse train, composed of alternating positive and negative amplitudes with under which alternating positive and negative echoes and respectively readout, and a phase coding gradient, so a phase-coded data set is acquired, the phase-coded data set is corrected on the basis of the progression curves, and is Fourier-transformed the corrected data set, to obtain an artifact-reduced (with regard to the Nyquist ghosts) image data set.

摘要翻译： 在用于减少医学磁共振成像中奈奎斯特幽灵的方法和MRT装置中，鉴于EPI回波的一个或多个特征量的一个或多个进展曲线的EPI序列的应用，取决于一个 由脉冲形状，脉冲幅度和脉冲持续时间定义的读出梯度脉冲串，EPI测量由读出梯度脉冲串实现，读出梯度脉冲串由交替的正和负振幅组成，其下交替正负回波并分别读出和相位编码 梯度，因此获取相位编码数据集，基于进展曲线来校正相位编码数据集，并且对经校正的数据集进行傅立叶变换，以获得伪像（关于奈奎斯特 鬼）图像数据集。

公开(公告)号：US07002347B2

公开(公告)日：2006-02-21

申请号：US10953303

申请日：2004-09-29

申请人： Thorsten Feiweier ,  Razvan Lazar ,  Wolfgang Renz ,  Lothar Schön

发明人： Thorsten Feiweier ,  Razvan Lazar ,  Wolfgang Renz ,  Lothar Schön

IPC分类号： G01V3/00

CPC分类号： G01R33/341

摘要： A local coil unit for a magnetic resonance apparatus, which radiates a radio-frequency field into an examination subject, has a housing and at least a part of the housing is formed of an insulating dielectric material that passively compensates for an inhomogeneity in the high-frequency field in the subject. The material has a relative dielectric value εr of greater than 50, preferably greater than 100, and a dielectric loss factor tan δ of less than 2.5×10−2, preferably less than 1×10−3. In the dielectric material displacement currents are generated which create an additional magnetic field that compensates for the minima in the B1 field as a result of the eddy currents arising in the patient due to the radio-frequency radiation.

摘要翻译： 用于将射频场辐射到检查对象中的磁共振设备的局部线圈单元具有壳体，并且壳体的至少一部分由绝缘电介质材料形成，被动地补偿高频场中的不均匀性， 频率场。 该材料具有大于50，优选大于100的相对电介质值εL r以及低于2.5×10 -2的介电损耗因子tanδ，优​​选地较小 超过1×10 -3 -3。 在电介质材料中，产生位移电流，其产生额外的磁场，其由于射频辐射而在患者体内产生的涡流的结果来补偿B1场中的最小值。