公开(公告)号：US10061006B2

公开(公告)日：2018-08-28

申请号：US15053009

申请日：2016-02-25

申请人： Siemens Healthcare GmbH ,  NorthShore University HealthSystem

发明人： Shivraman Giri ,  Robert R. Edelman ,  Ioannis Koktzoglou

IPC分类号： G01R33/56 ,  G01R33/563 ,  G01R33/561

CPC分类号： G01R33/5635 ,  G01R33/4835 ,  G01R33/561 ,  G01R33/5611 ,  G01R33/5613 ,  G01R33/56383

摘要： A magnetic resonance method and system are provided for projection MR imaging of vascular structures within a subject, with scan times that are shorter than those needed for conventional techniques. Image acquisition sequences are synchronized with heartbeat cycles of the subject, and are configured to generate image data having a reduced spatial resolution in the projection direction perpendicular to a preselected projection plane. A reduction factor F quantifies this reduced resolution, such that the number of data acquisition sequences provided within each heartbeat cycle is F times as many as a comparable imaging protocol that generates full-resolution data. The total scan time can be reduced by a factor of F with negligible degradation in the projection image quality.

公开(公告)号：US10018699B2

公开(公告)日：2018-07-10

申请号：US14729501

申请日：2015-06-03

申请人： Siemens Aktiengesellschaft

发明人： Thomas Beck

IPC分类号： G01V3/00 ,  G01R33/565 ,  G01R33/34 ,  G01R33/563 ,  G01R33/567 ,  G01R33/50

CPC分类号： G01R33/56509 ,  G01R33/34092 ,  G01R33/50 ,  G01R33/56383 ,  G01R33/5673 ,  G01R33/5676

摘要： In a method and magnetic resonance (MR) apparatus for performing an MR examination with prospective motion correction, multiple MR signals are acquired. For each MR signal, signal, an examination volume is established and a navigator volume is established for recording navigator signals. The examination volume and the navigator volume are not identical. At least one navigator reference signal is acquired at a time t0, and at least one navigator signal is acquired at a time t1>t0. Motion information is determined from the navigator signal and the navigator reference signal, and the recording parameters are set as a function of the motion information. At least one further magnetic resonance signal is acquired with this setting.

公开(公告)号：US09782106B2

公开(公告)日：2017-10-10

申请号：US14967840

申请日：2015-12-14

申请人： Siemens Aktiengesellschaft

发明人： Michael Zenge

IPC分类号： A61B5/00 ,  A61B5/055 ,  G06T11/00 ,  G01R33/563

CPC分类号： A61B5/055 ,  A61B5/7246 ,  A61B5/7289 ,  G01R33/5635 ,  G01R33/56383 ,  G06T11/008 ,  G06T2211/404 ,  G06T2211/424

摘要： In a method and apparatus, magnetic resonance angiography images of an examination volume of a patient are obtained using time-of-flight angiography in a magnetic resonance scanner. By continuous recording, a number of two-dimensional slice images covering the examination volume along an axial direction are acquired in a slice-by-slice layer-wise, such as with overlapping. The slice images are divided into groups of, in each case, a predetermined number of consecutive slice images in the axial direction. A maximum intensity projection image is determined for each group, and the angiography images are determined as the maximum intensity projection images and/or dependent on the maximum intensity projection images.

公开(公告)号：US09442173B2

公开(公告)日：2016-09-13

申请号：US13700302

申请日：2011-05-27

申请人： Michael John Disney Mallett ,  Gianni Mario Ferrante

发明人： Michael John Disney Mallett ,  Gianni Mario Ferrante

IPC分类号： G01R33/383 ,  G01N24/08 ,  G01R33/563

CPC分类号： G01R33/383 ,  G01N24/08 ,  G01N24/085 ,  G01R33/56383

摘要： A system for NMR assessing a sample or a series of samples in turn which comprises means for applying a static magnetic field in a first direction through the sample, pre-polarizing means for first applying a magnetic field in substantially the same direction to the sample, means for applying an alternating excitation magnetic field in a second different direction through the sample, means for sensing energy emitted by the sample in response to the excitation magnetic field, and means arranged to provide an indication of an assessment of the sample based on the energy emitted by the sample in response to the excitation magnetic field.

摘要翻译： 一种用于核磁共振评估样品或一系列样品的系统，其包括用于通过样品施加沿第一方向的静磁场的装置，用于首先向样品施加基本上相同方向的磁场的预偏振装置， 用于通过样品施加沿第二不同方向的交替激励磁场的装置，用于响应于激发磁场感测由样品发射的能量的装置，以及用于基于能量提供对样品的评估指示的装置 由样品响应于激发磁场而发射。

公开(公告)号：US09389293B2

公开(公告)日：2016-07-12

申请号：US13416289

申请日：2012-03-09

申请人： Alto Stemmer

发明人： Alto Stemmer

IPC分类号： G01R33/44 ,  G01R33/563 ,  G01R33/565 ,  G01R33/24

CPC分类号： G01R33/56383 ,  G01R33/246 ,  G01R33/5659

摘要： A method and magnetic resonance tomography system to generate magnetic resonance image data of an examination subject, raw imaging data are acquired from multiple slices of a predetermined volume region of the examination subject using local coils during a table feed in the magnetic resonance scanner. Image data of the slices are reconstructed on the basis of the raw imaging data. A normalization of the image data is subsequently implemented on the basis of measured coil sensitivity data of the local coils that are used.

摘要翻译： 一种用于产生检查对象的磁共振图像数据的方法和磁共振断层摄影系统，在磁共振扫描器中的表进给期间，使用局部线圈从检查对象的预定体积区域的多个切片中获取原始成像数据。 基于原始成像数据重建切片的图像数据。 随后基于所使用的局部线圈的测量线圈灵敏度数据来实现图像数据的归一化。

公开(公告)号：US09383423B2

公开(公告)日：2016-07-05

申请号：US13891181

申请日：2013-05-09

申请人： Chunlei Liu

发明人： Chunlei Liu

IPC分类号： G01R33/54 ,  A61B5/055 ,  G01R33/48 ,  A61B5/00 ,  G01R33/24 ,  G01R33/563

CPC分类号： G01R33/54 ,  A61B5/0042 ,  A61B5/055 ,  G01R33/243 ,  G01R33/48 ,  G01R33/56383

摘要： The present disclosure provides a method and system for quantifying and making images of tissue anisotropy property based on magnetic resonance imaging (MRI). The systems and methods provided herein utilize orientation distribution of magnetic susceptibility to characterize magnetic susceptibility anisotropy (MSA) inside biological tissues. This MSA may be intrinsic property of the tissue or may be induced by the presence of external agents. In certain embodiments, the MSA is displayed as an orientation distribution function of susceptibility and/or may be described by mathematical quantities such as tensors (e.g., symmetric or asymmetric second order or higher order tensors) and spherical harmonics. In other embodiments, the MSA is characterized using a second order tensor named apparent susceptibility tensor (AST).

公开(公告)号：US08643365B2

公开(公告)日：2014-02-04

申请号：US13194146

申请日：2011-07-29

申请人： Martin Harder ,  Heiko Meyer

发明人： Martin Harder ,  Heiko Meyer

IPC分类号： G01V3/00

CPC分类号： G01R33/56383 ,  G01R33/4833 ,  G01R33/4838 ,  G01R33/543

摘要： In a method to create magnetic resonance (MR) images of a predetermined volume segment within an examination subject by operation of an MR system with continuous table displacement, at least one slice with a respective, predetermined thickness is defined, and for each slice, a partial region of the slice is selected, the respective partial region being bounded in a direction perpendicular to the thickness direction of the corresponding slice, and measurement signals are acquired from the slice, the acquired measurement signals originating from only the respective partial region of the slice.

摘要翻译： 在通过具有连续表位移的MR系统的操作来创建检查对象内的预定体积段的磁共振（MR）图像的方法中，限定具有相应的预定厚度的至少一个切片，并且对于每个切片， 选择切片的局部区域，相应的部分区域在垂直于相应切片的厚度方向的方向上被界定，并且从切片获取测量信号，所获取的测量信号仅源于切片的相应部分区域 。

公开(公告)号：US20140009153A1

公开(公告)日：2014-01-09

申请号：US13922321

申请日：2013-06-20

申请人： SIEMENS AKTIENGESELLSCHAFT

发明人： Jan Ole BLUMHAGEN ,  Stephan KANNENGIEßER

IPC分类号： G01R33/565

CPC分类号： G01R33/565 ,  G01R33/56383 ,  G01R33/56391 ,  G01R33/56563 ,  G01R33/56572

摘要： Various embodiments relate to a method for determining distortion-reduced magnetic resonance data in a subarea of a magnetic resonance system located along a radial direction of the magnetic resonance system at the edge of a field of view of the magnetic resonance system. The method includes positioning the object to be examined at a first and a second position along an axial direction of the magnetic resonance system and acquiring first magnetic resonance data in the subarea at the first position and acquiring second magnetic resonance data in the same subarea at the second position. The method also includes determining distortion-reduced magnetic resonance data based on the first and second magnetic resonance data.

摘要翻译： 各种实施例涉及一种用于在磁共振系统的视场的边缘处沿着磁共振系统的径向位于磁共振系统的子区域中确定变形减小的磁共振数据的方法。 该方法包括沿着磁共振系统的轴向在第一和第二位置处定位被检查物体，并且在第一位置获取子区域中的第一磁共振数据，并且在第一位置处获取位于相同子区域中的第二磁共振数据 第二名 该方法还包括基于第一和第二磁共振数据确定失真减小的磁共振数据。

公开(公告)号：US08594400B2

公开(公告)日：2013-11-26

申请号：US12713745

申请日：2010-02-26

申请人： Robert David Darrow ,  Thomas Kwok-Fah Foo

发明人： Robert David Darrow ,  Thomas Kwok-Fah Foo

IPC分类号： G06K9/00

CPC分类号： G01R33/543 ,  G01R33/56383 ,  G06T7/0012 ,  G06T2207/10088 ,  G06T2207/30096

摘要： A system and method for an MRI apparatus includes an MRI system having a computer programmed to initiate a first scan procedure to acquire MR data and locate a feature of interest of the object, initiate a second scan procedure when a feature of interest of the object is located, and determine if an anomaly of the feature of interest exists. The computer is programmed to initiate a third scan procedure to scan the anomaly and reconstruct an image of the located anomaly if the anomaly exists. The first scan procedure includes a scan table motion and scan data acquisition commands. The second scan procedure includes scan table motion and scan data acquisition commands to acquire MR data from the feature of interest. The third scan procedure includes scan table motion and scan data acquisition commands to acquire MR data from the located anomaly.

摘要翻译： 用于MRI装置的系统和方法包括MRI系统，其具有被编程为启动第一扫描过程以获取MR数据并定位所述对象的感兴趣特征的计算机，当所述对象的兴趣特征是 并确定是否存在感兴趣的特征的异常。 计算机被编程为启动第三扫描过程以扫描异常并且如果异常存在则重建位置异常的图像。 第一扫描程序包括扫描表运动和扫描数据采集命令。 第二扫描过程包括扫描表运动和扫描数据获取命令，以从感兴趣的特征获取MR数据。 第三扫描程序包括扫描表运动和扫描数据采集命令，以从定位的异常中获取MR数据。

公开(公告)号：US20130281825A1

公开(公告)日：2013-10-24

申请号：US13451250

申请日：2012-04-19

申请人： Sheshadri Thiruvenkadam ,  Dattesh Dayanand Shanbhag ,  Rakesh Mullick ,  Florian Wiesinger ,  Sandeep Suryanarayana Kaushik

发明人： Sheshadri Thiruvenkadam ,  Dattesh Dayanand Shanbhag ,  Rakesh Mullick ,  Florian Wiesinger ,  Sandeep Suryanarayana Kaushik

IPC分类号： A61B5/055 ,  A61B6/03 ,  A61B6/02

CPC分类号： A61B5/055 ,  A61B5/0035 ,  A61B6/037 ,  A61B6/463 ,  A61B6/5247 ,  A61B6/582 ,  G01R33/481 ,  G01R33/485 ,  G01R33/5602 ,  G01R33/56383

摘要： In one embodiment, a method includes performing a magnetic resonance (MR) imaging sequence to acquire MR image slices or volumes of a first station representative of a portion of a patient; applying a first phase field algorithm to the first station to determine a body contour of the patient in the first station; identifying a contour of a first anatomy of interest within the body contour of the first station using the first phase field algorithm or a second phase field algorithm; segmenting the first anatomy of interest based on the identified contour of the first anatomy of interest; correlating first attenuation information to the segmented first anatomy of interest; and modifying a positron emission tomography (PET) image based at least on the first correlated attenuation information.

摘要翻译： 在一个实施例中，一种方法包括执行磁共振（MR）成像序列以获取表示患者的一部分的第一站的MR图像切片或体积; 将第一相位场算法应用于所述第一站以确定所述第一站中的所述患者的身体轮廓; 使用第一相位场算法或第二相位算法，在第一站的身体轮廓内识别感兴趣的第一解剖结构的轮廓; 基于感兴趣的第一解剖结构的识别轮廓来分割感兴趣的第一解剖结构; 将第一衰减信息与感兴趣的分段的第一解剖结构相关联; 以及至少基于所述第一相关衰减信息修改正电子发射断层摄影（PET）图像。