公开(公告)号：US20160169999A1

公开(公告)日：2016-06-16

申请号：US14889135

申请日：2010-03-09

申请人： Daniel Alfredo Herza ,  John Andrew Derbyshire

发明人： Daniel Alfredo Herza ,  John Andrew Derbyshire

IPC分类号： G01R33/563 ,  A61B5/0402 ,  G01R33/48 ,  A61B18/20 ,  G01R33/385 ,  G01R33/36 ,  A61B5/0205 ,  A61B5/00

CPC分类号： G01R33/563 ,  A61B5/0205 ,  A61B5/0402 ,  A61B5/055 ,  A61B5/08 ,  A61B5/1102 ,  A61B5/113 ,  A61B5/4836 ,  A61B5/7207 ,  A61B5/7257 ,  A61B5/7285 ,  A61B18/20 ,  A61B2018/00577 ,  A61B2018/00994 ,  A61B2576/00 ,  G01R33/36 ,  G01R33/385 ,  G01R33/4808 ,  G01R33/4824 ,  G01R33/56308 ,  G01R33/56325 ,  G01R33/5676

摘要： A magnetic resonance imaging (MRI) system, comprising a magnetic resonance imaging scanner. The MR scanner comprises a main magnet providing a substantially uniform main magnetic field B0 for a subject under observation, the subject represented by a spatial distribution of magnetizations; a radio frequency (RF) coil system configured to irradiate a plurality of radio frequency (RF) pulses into a region of interest of the subject and to detect a plurality of RF response signals emitted from the region of interest; a gradient coil system configured to provide a perturbation of the main magnetic field B0 using a gradient pulse sequence that causes the RF response signals to encode the spatial distribution of magnetizations in a Fourier domain on a plurality of read-out paths; and a controller in communication with the RF coil system and the gradient coil system to synchronously provide the RF coil system with the plurality of RF pulses and the gradient coil system with the gradient pulse sequence. The gradient pulse sequence comprises a navigator pulse that causes one of the plurality of RF response signals to encode the spatial distribution of magnetizations in the Fourier domain on a pre-determined navigator path that represents a fixed projection of the region of interest of the subject, the pre-determined navigator path is suitable to be in a direction different from directions of the read-out paths, and the fixed projection of the subject is capable of tracking a motion of the subject.

摘要翻译： 磁共振成像（MRI）系统，包括磁共振成像扫描仪。 MR扫描仪包括主磁体，为观察对象提供基本上均匀的主磁场B0，该对象由磁化的空间分布表示; 射频（RF）线圈系统，被配置为将多个射频（RF）脉冲照射到所述对象的感兴趣区域中并且检测从所述感兴趣区域发射的多个RF响应信号; 梯度线圈系统，被配置为使用梯度脉冲序列来提供主磁场B0的扰动，所述梯度脉冲序列使RF响应信号在多个读出路径上的傅立叶域中的磁化空间分布进行编码; 以及与RF线圈系统和梯度线圈系统通信的控制器，以使RF线圈系统与梯度脉冲序列同步地提供多个RF脉冲和梯度线圈系统。 梯度脉冲序列包括导航器脉冲，其导致所述多个RF响应信号中的一个RFF响应信号将傅立叶域中的磁化的空间分布编码在预定导航器路径上，所述预定导航器路径表示所述对象感兴趣区域的固定投影， 预定导航器路径适合于与读出路径的方向不同的方向，并且被摄体的固定投影能够跟踪被摄体的运动。