公开(公告)号：US5792054A

公开(公告)日：1998-08-11

申请号：US712953

申请日：1996-09-12

申请人： Marc Kouwenhoven ,  Johannes J. Van Vaals ,  Lennart Hofland ,  Rudolf W. De Boer

发明人： Marc Kouwenhoven ,  Johannes J. Van Vaals ,  Lennart Hofland ,  Rudolf W. De Boer

IPC分类号： A61B5/055 ,  G01R33/48 ,  G01R33/563

CPC分类号： G01R33/5635 ,  G01R33/5605

摘要： An off-resonance magnetization transfer contrast (MTC) RF-pulse (54, 64) is used in magnetic resonance angiography (MRA) to suppress the signal of various stationary tissues, such as brain tissue while avoiding significant suppression of signal from blood flowing in a general direction of blood flow into a slice being imaged. Application of a magnetic gradient (55, 65, 85) during the MTC RF-pulse (54, 64) directed in the general direction of blood flow increases the magnetization frequency offset (86) relative to the center frequency of the MTC RF-pulse for points within and feeding blood to the slice. The MTC RF-pulse thus causes only a small signal reduction of the blood flowing into the slice in the general direction of blood flow while producing a saturation of any blood flowing into the slice in the opposite direction. Consequently, both time and RF-power needed for a separate presaturation pulse can now be used for the MTC RF-pulse.

摘要翻译： 在磁共振血管造影术（MRA）中使用非共振磁化转移对比（MTC）RF脉冲（54,64）来抑制诸如脑组织的各种静止组织的信号，同时避免对来自血液流动的信号的显着抑制 血液流入被成像的切片的大致方向。 在针对大体血流方向的MTC RF脉冲（54,64）期间施加磁梯度（55,65,85）相对于MTC RF脉冲的中心频率增加磁化频率偏移（86） 对于切片内的血液和血液进行供血。 因此，MTC RF脉冲仅导致在血流的大致方向上流入切片的血液的小信号减少，同时产生沿相反方向流入切片的任何血液的饱和度。 因此，现在可以将MTC RF脉冲用于单独的预饱和脉冲所需的时间和RF功率。

公开(公告)号：US20110206260A1

公开(公告)日：2011-08-25

申请号：US13126274

申请日：2009-11-02

申请人： Cornelis Johannes Franciscus Maria Bergmans ,  Daniel Bystrov ,  Harald Sepp Heese ,  Marc Kouwenhoven ,  Johan Michiel Den Harder ,  Arjan Willem Simonetti ,  Wendy De Kok

发明人： Cornelis Johannes Franciscus Maria Bergmans ,  Daniel Bystrov ,  Harald Sepp Heese ,  Marc Kouwenhoven ,  Johan Michiel Den Harder ,  Arjan Willem Simonetti ,  Wendy De Kok

IPC分类号： G06K9/00

CPC分类号： G01R33/54 ,  G01R33/543 ,  G01R33/546 ,  G01R33/5608 ,  G01R33/56383

摘要： A method of acquiring at least one clinical MRI image of a subject comprising the following steps: acquiring a first survey image with a first field of view, the first survey image having a first spatial resolution,—locating a first region of interest and at least one anatomical landmarks in the first survey image, determining the position and the orientation of the first region of interest using the anatomical landmarks, the position and the orientation of the first region being used for—planning a second survey image,—acquiring the second survey image with a second field of view, the second survey image having a second spatial resolution, the second spatial resolution being higher than the first spatial resolution, generating a geometry planning for the anatomical region of interest using the second survey image,—acquiring a diagnostic image of the anatomical region of interest using the geometry planning.

摘要翻译： 一种获取对象的至少一个临床MRI图像的方法，包括以下步骤：获取具有第一视场的第一测量图像，所述第一测量图像具有第一空间分辨率， - 定位第一感兴趣区域并且至少 在第一调查图像中的一个解剖标记，使用解剖学标记确定第一感兴趣区域的位置和方向，第一区域的位置和取向用于计划第二调查图像， - 获取第二调查 具有第二视场的图像，所述第二测量图像具有第二空间分辨率，所述第二空间分辨率高于所述第一空间分辨率，使用所述第二测量图像生成所述感兴趣解剖区域的几何规划， - 获取诊断 使用几何规划的感兴趣解剖区域的图像。

公开(公告)号：US20080154121A1

公开(公告)日：2008-06-26

申请号：US11568226

申请日：2005-04-21

申请人： Marc Kouwenhoven

发明人： Marc Kouwenhoven

IPC分类号： A61B5/055

CPC分类号： G01R33/5673

摘要： A magnetic resonance imaging method involves detection of a series of trigger events and acquisition of successive segments of magnetic resonance signals from respective segments of k-space. The occurrence of the next trigger event is predicted, e.g. by way of a running average, on the basis of the detected series of trigger events. Acquisition of at least one individual segment of magnetic resonance signals is triggered on the basis of the occurrence of the predicted trigger event. Triggering of the acquisition is based on the predicted trigger event, e.g. in that the instant and duration of the acquisition is adjusted on the basis of the prediction of the trigger event. Finally, a magnetic resonance image is reconstructed from several segments of magnetic resonance signals.

摘要翻译： 磁共振成像方法包括检测一系列触发事件和从k空间的相应片段获取连续的磁共振信号段。 预测下一个触发事件的发生，例如， 通过运行平均值，在检测到的一系列触发事件的基础上。 基于预测的触发事件的发生触发获取至少一个单独的磁共振信号段。 捕获的触发基于预测的触发事件，例如， 因为基于触发事件的预测来调整采集的瞬间和持续时间。 最后，从磁共振信号的几个部分重建磁共振图像。

公开(公告)号：US08565505B2

公开(公告)日：2013-10-22

申请号：US13126274

申请日：2009-11-02

申请人： Cornelis Johannes Franciscus Maria Bergmans ,  Daniel Bystrov ,  Harald Sepp Heese ,  Marc Kouwenhoven ,  Johan Michiel Den Harder ,  Arjan Willem Simonetti ,  Wendy De Kok

发明人： Cornelis Johannes Franciscus Maria Bergmans ,  Daniel Bystrov ,  Harald Sepp Heese ,  Marc Kouwenhoven ,  Johan Michiel Den Harder ,  Arjan Willem Simonetti ,  Wendy De Kok

IPC分类号： G06K9/00

CPC分类号： G01R33/54 ,  G01R33/543 ,  G01R33/546 ,  G01R33/5608 ,  G01R33/56383

摘要： A method of acquiring at least one clinical MRI image of a subject comprising the following steps: acquiring a first survey image with a first field of view, the first survey image having a first spatial resolution,—locating a first region of interest and at least one anatomical landmarks in the first survey image, determining the position and the orientation of the first region of interest using the anatomical landmarks, the position and the orientation of the first region being used for—planning a second survey image,—acquiring the second survey image with a second field of view, the second survey image having a second spatial resolution, the second spatial resolution being higher than the first spatial resolution, generating a geometry planning for the anatomical region of interest using the second survey image,—acquiring a diagnostic image of the anatomical region of interest using the geometry planning.

摘要翻译： 一种获取对象的至少一个临床MRI图像的方法，包括以下步骤：获取具有第一视场的第一测量图像，所述第一测量图像具有第一空间分辨率， - 定位第一感兴趣区域并且至少 在第一调查图像中的一个解剖标记，使用解剖学标记确定第一感兴趣区域的位置和方向，第一区域的位置和取向用于计划第二调查图像， - 获取第二调查 具有第二视场的图像，所述第二测量图像具有第二空间分辨率，所述第二空间分辨率高于所述第一空间分辨率，使用所述第二测量图像生成所述感兴趣解剖区域的几何规划， - 获取诊断 使用几何规划的感兴趣解剖区域的图像。

公开(公告)号：US07702377B2

公开(公告)日：2010-04-20

申请号：US11568226

申请日：2005-04-21

申请人： Marc Kouwenhoven

发明人： Marc Kouwenhoven

IPC分类号： A61B5/055

CPC分类号： G01R33/5673

摘要： A magnetic resonance imaging method involves detection of a series of trigger events and acquisition of successive segments of magnetic resonance signals from respective segments of k-space. The occurrence of the next trigger event is predicted, e.g. by way of a running average, on the basis of the detected series of trigger events. Acquisition of at least one individual segment of magnetic resonance signals is triggered on the basis of the occurrence of the predicted trigger event. Triggering of the acquisition is based on the predicted trigger event, e.g. in that the instant and duration of the acquisition is adjusted on the basis of the prediction of the trigger event. Finally, a magnetic resonance image is reconstructed from several segments of magnetic resonance signals.

摘要翻译： 磁共振成像方法包括检测一系列触发事件和从k空间的相应片段获取连续的磁共振信号段。 预测下一个触发事件的发生，例如， 通过运行平均值，在检测到的一系列触发事件的基础上。 基于预测的触发事件的发生触发获取至少一个单独的磁共振信号段。 捕获的触发基于预测的触发事件，例如， 因为基于触发事件的预测来调整采集的瞬间和持续时间。 最后，从磁共振信号的几个部分重建磁共振图像。

公开(公告)号：US07180289B2

公开(公告)日：2007-02-20

申请号：US10516601

申请日：2003-05-21

申请人： Marc Kouwenhoven

发明人： Marc Kouwenhoven

IPC分类号： G01V3/00

CPC分类号： G01R33/5611 ,  G01R33/4833 ,  G01R33/4835 ,  G01R33/56545

摘要： A magnetic resonance imaging method for forming forms an image of an object from a plurality of signals acquired by an array of multiple receiver antennae, and in which spins are excited in a pail of the object. Slices (22) are selected with a predetermined field-of-view for scanning the object and are rotated uniformly over a predetermined angle. MR signals are measured along a predetermined trajectory containing a plurality of lines of slices in k-space by application of a read gradient and other gradients. Further slices (24) are shifted in a lengthwise direction obtaining a staggered arrangement such that the beginning and end of each slice are at least approximately within the area covered by the slices before rotation.

摘要翻译： 用于形成的磁共振成像方法从由多个接收器天线的阵列获取的多个信号中形成对象的图像，并且其中自旋在物体的桶中被激发。 选择具有用于扫描物体的预定视野并且在预定角度上均匀旋转的切片（22）。 通过应用读取梯度和其他梯度，沿着包含k空间中的多条切片的预定轨迹测量MR信号。 进一步的切片（24）在长度方向上移动，获得交错布置，使得每个切片的开始和结束至少近似在旋转之前由切片覆盖的区域内。

公开(公告)号：US20050146328A1

公开(公告)日：2005-07-07

申请号：US10516601

申请日：2003-05-21

申请人： Marc Kouwenhoven

发明人： Marc Kouwenhoven

IPC分类号： A61B5/055 ,  G01R33/54 ,  G01R33/561 ,  G01R33/565 ,  G01V3/00

CPC分类号： G01R33/5611 ,  G01R33/4833 ,  G01R33/4835 ,  G01R33/56545

摘要： A magnetic resonance imaging method for forming an image of an object from a plurality of signals acquired by an array of multiple receiver antennae, wherein spins are excited in a part of the object. Slices (22) are selected with a predetermined Field-of-View for scanning the object and are rotated uniformly over a predetermined angle. MR signals are measured along a predetermined trajectory containing a plurality of lines said slices in k-space by application of a read gradient and other gradients. Further the slices (24) are shifted in lengthwise direction obtaining a staggered arrangement such that the beginning and the end of each of said slices are at least approximately within the area covered by the slices before rotation.

摘要翻译： 一种磁共振成像方法，用于从由多个接收器天线的阵列获取的多个信号中形成物体的图像，其中在物体的一部分中激发自旋。 选择具有用于扫描物体的预定视场并在预定角度上均匀旋转的切片（22）。 通过应用读取梯度和其他梯度，沿着包含多个线的预定轨迹测量MR信号，所述切片在k空间中。 此外，切片（24）在长度方向上移动，获得交错布置，使得每个所述切片的开始和结束至少近似在旋转之前由切片覆盖的区域内。

公开(公告)号：US06838879B2

公开(公告)日：2005-01-04

申请号：US10296185

申请日：2002-03-19

申请人： Marc Kouwenhoven

发明人： Marc Kouwenhoven

IPC分类号： G01R33/48 ,  A61B5/055 ,  G01R33/3415 ,  G01R33/54 ,  G01R33/561 ,  G01V3/00

CPC分类号： G01R33/4833 ,  G01R33/3415 ,  G01R33/5611

摘要： At least one reference plane, but preferably three orthogonal reference planes (A, C, S) are defined in a magnetic resonance imaging method. A cut plane is chosen so as to extend at an angle to one (single oblique) (SO) or two (double oblique) (DO) of the reference planes. One side of the field of view within the cut plane remains parallel to one (of the) reference plane (planes). A cross-sectional magnetic resonance image along the cut plane is reconstructed from magnetic resonance signals.

摘要翻译： 在磁共振成像方法中限定至少一个参考平面，但优选三个正交参考平面（A，C，S）。 选择切割平面以与参考平面的一个（单个倾斜）（SO）或两个（双倾斜）（DO）成一定角度延伸。 在切割平面内的视野的一侧保持平行于一个参考平面（平面）。 沿着切割平面的横截面磁共振图像由磁共振信号重建。