公开(公告)号：US07667459B2

公开(公告)日：2010-02-23

申请号：US10564697

申请日：2004-07-08

申请人： Jens Jensen ,  Joseph A. Helpern ,  Glyn Johnson ,  Ramesh Chandra

发明人： Jens Jensen ,  Joseph A. Helpern ,  Glyn Johnson ,  Ramesh Chandra

IPC分类号： G01V3/00

CPC分类号： G01R33/50 ,  G01R33/56341 ,  G01R33/56536 ,  Y10T436/24

摘要： Methods, systems, software arrangements and storage medium for measuring the magnetic field correlation function (“MFC”), and more particularly, to methods for measuring the magnetic field correlation function utilizing asymmetric spin echoes. Asymmetric Dual Spin Echo Sequences (“ADSE”) and Echo Planar Imaging Asymmetric Dual Spin Echo Sequences (“EPI-ADSE”) may be employed to apply multiple echoes to a sample and acquire data from which the MFC may be determined.

摘要翻译： 用于测量磁场相关函数（“MFC”）的方法，系统，软件布置和存储介质，更具体地说，涉及利用非对称自旋回波测量磁场相关函数的方法。 可以采用非对称双自旋回波序列（“ADSE”）和回波平面成像不对称双自旋回波序列（“EPI-ADSE”）将多个回波应用于样本，并获取可以确定MFC的数据。

公开(公告)号：US20070190663A1

公开(公告)日：2007-08-16

申请号：US11504570

申请日：2006-08-14

申请人： Ray Lee ,  Georgeann McGunness ,  Glyn Johnson ,  Qun Chen ,  Robert Grossman

发明人： Ray Lee ,  Georgeann McGunness ,  Glyn Johnson ,  Qun Chen ,  Robert Grossman

IPC分类号： G01N24/00 ,  A61B5/05

CPC分类号： G01R33/5601 ,  G01R33/3415 ,  G01R33/3635 ,  G01R33/3642 ,  G01R33/365 ,  G01R33/5611 ,  Y10T436/24

摘要： A system and method for performing parallel magnetic resonance imaging (“MRI”) with a polarizable or hyperpolarizable contrast agent are provided. The contrast agent may be provided in the form of a gas, a liquid, or a solid. The system may include a phased-array rigid coil with, e.g., a 24-channel phased-array for a receiver and a 2-channel large loop for a transmitter. The phased-array rigid coil can be connected to a low impedance preamplifier for decoupling the strong coupling between two adjacent coils in the phased-array rigid coil. The system and method may be used for enhancing the signal-to-noise ratio, and/or reducing the scan acquisition time of acquired images in a parallel MRI scan of a patient who is breathing a hyperpolarized gas.

摘要翻译： 提供了一种用可极化或超极化造影剂进行并行磁共振成像（“MRI”）的系统和方法。 造影剂可以以气体，液体或固体的形式提供。 该系统可以包括具有例如用于接收器的24通道相控阵列和用于发射器的2通道大环路的相控阵刚体线圈。 相控阵刚体线圈可以连接到低阻抗前置放大器，用于去耦相控阵刚体线圈中两个相邻线圈之间的强耦合。 该系统和方法可以用于增强信噪比，和/或减少在呼吸超极化气体的患者的并行MRI扫描中获取的图像的扫描获取时间。

公开(公告)号：US5221899A

公开(公告)日：1993-06-22

申请号：US692911

申请日：1991-04-29

申请人： Oded Gonen ,  Glyn Johnson

发明人： Oded Gonen ,  Glyn Johnson

IPC分类号： G01R33/56 ,  G01R33/565

CPC分类号： G01R33/4625 ,  G01R33/3621 ,  G01R33/5608

摘要： For use in nuclear magnetic resonance (NMR) spectroscopy and magnetic resonance imaging (MRI), a method and apparatus for signal acquisition are disclosed. Preferred processing involves elimination of an unwanted signal by subtraction, in the time domain, of a cancellation signal from a free-induction-decay actual signal. A cancellation signal may be obtained, e.g., by smoothing a free-induction-decay signal, by curve fitting, or by computer simulation.

摘要翻译： 用于核磁共振（NMR）光谱和磁共振成像（MRI）中，公开了用于信号采集的方法和装置。 优选的处理涉及通过在时域中从自由感应衰减实际信号中减去抵消信号来消除不想要的信号。 可以通过例如通过曲线拟合来平滑自由感应衰减信号或通过计算机模拟来获得消除信号。