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    MAGNETIC FIELD GRADIENT MONITOR AND MAGNETIC FIELD GRADIENT WAVEFORM CORRECTION APPARATUS AND METHODS
    3.
    发明申请
    MAGNETIC FIELD GRADIENT MONITOR AND MAGNETIC FIELD GRADIENT WAVEFORM CORRECTION APPARATUS AND METHODS 有权
    磁场梯度监视器和磁场梯度波形校正装置及方法

    公开(公告)号：US20130234708A1

    公开(公告)日：2013-09-12

    申请号：US13866696

    申请日：2013-04-19

    Applicant: Frederic Goora ,  Bruce Balcom

    Inventor： Frederic Goora ,  Bruce Balcom

    IPC: G01R33/54

    CPC classification number: G01R33/54 ,  G01R33/3852 ,  G01R33/56572 ,  G01R33/58

    Abstract: Method for correcting the magnetic field gradient waveform in a magnetic resonance measurement including extracting an impulse response from the measured step response of a magnetic resonance system, determining the slew rate of the system during the step response measurement, modifying the desired output waveform such that the desired output waveform is constrained to within the slew rate and the bandwidth of the system, and determining the required pre-equalized input waveform.

    Abstract translation: 一种用于校正磁共振测量中的磁场梯度波形的方法，包括从所述测量的磁共振系统的阶跃响应中提取脉冲响应，确定在所述阶跃响应测量期间所述系统的转换速率，修改所述期望的输出波形， 期望的输出波形被限制在系统的压摆率和带宽内，并且确定所需的预均衡输入波形。

    MAGNETIC FIELD GRADIENT MONITOR APPARATUS AND METHOD
    4.
    发明申请
    MAGNETIC FIELD GRADIENT MONITOR APPARATUS AND METHOD 有权
    磁场梯度监视装置及方法

    公开(公告)号：US20110181284A1

    公开(公告)日：2011-07-28

    申请号：US13003509

    申请日：2009-07-08

    Applicant: Bruce Balcom ,  Hui Han

    Inventor： Bruce Balcom ,  Hui Han

    IPC: G01R33/44

    CPC classification number: G01R33/58 ,  G01R33/243 ,  G01R33/56341 ,  G01R33/56518

    Abstract: A method based on pure phase encode FIDs that permits high strength gradient measurement is disclosed. A small doped water phantom (1˜3 mm droplet, T1, T2, T2*

    Abstract translation: 公开了一种基于允许高强度梯度测量的纯相编码FID的方法。 微探针内的小掺杂水体（1〜3mm液滴，T1，T2，T2 * <100μs）被一系列紧密间隔的宽带RF脉冲激发，每个随后是单次FID点采集。 两个试验梯度波形说明了这种技术，这两种都不能通过常规的微探针测量来测量。 第一个是延长的持续时间梯度波形，而另一个示出了该方法测量具有大的净面积和/或高幅度的梯度波形的能力。 该方法是一个点监视器，具有简单的实现和低成本的硬件要求。

    Spin echo SPI methods for quantitative analysis of fluids in porous media
    6.
    发明授权
    Spin echo SPI methods for quantitative analysis of fluids in porous media 有权
    旋转回波SPI方法用于定量分析多孔介质中的流体

    公开(公告)号：US09018950B2

    公开(公告)日：2015-04-28

    申请号：US13003529

    申请日：2009-07-08

    Applicant: Linqing Li ,  Bruce Balcom ,  Derrick Green ,  Oleg Petrov

    Inventor： Linqing Li ,  Bruce Balcom ,  Derrick Green ,  Oleg Petrov

    IPC: G01R33/50 ,  G01V3/32 ,  G01N24/08 ,  G01R33/561

    CPC classification number: G01V3/32 ,  G01N24/081 ,  G01N24/085 ,  G01R33/50 ,  G01R33/5617

    Abstract: A method of measuring a parameter in a sample by imaging at least a portion of the sample using a spin-echo single-point imaging (SE-SPI) pulse sequence. This method involves applying a pure phase encoding to the SE-SPI pulse sequence, acquiring a multiplicity of echoes, and determining the spatially resolved T2 distribution. In another embodiment, individual echoes are separately phase encoded in a multi-echo acquisition and the SE-SPI pulse sequence is a hybrid SE-SPI sequence. In another embodiment, an external force can be used to build up a distribution of saturations in the sample, and a T2 distribution can be measured for the sample, which is then used to determine a parameter of the sample. A spatially resolved T2 distribution can also be measured and a resulting spatially resolved T2 distribution used to determine the T2 distribution as a function of capillary pressure.

    Abstract translation: 一种通过使用自旋回波单点成像（SE-SPI）脉冲序列对至少一部分样品进行成像来测量样本中的参数的方法。 该方法包括对SE-SPI脉冲序列应用纯相位编码，获取多个回波，以及确定空间分辨的T2分布。 在另一个实施例中，单个回波在多回波采集中单独相位编码，并且SE-SPI脉冲序列是混合SE-SPI序列。 在另一个实施例中，可以使用外力来建立样品中的饱和度分布，并且可以测量样品的T2分布，然后将其用于确定样品的参数。 还可以测量空间分辨的T2分布，并且得到空间分辨的T2分布，用于确定作为毛细管压力的函数的T2分布。

    SPIN ECHO SPI METHODS FOR QUANTITATIVE ANALYSIS OF FLUIDS IN POROUS MEDIA
    8.
    发明申请
    SPIN ECHO SPI METHODS FOR QUANTITATIVE ANALYSIS OF FLUIDS IN POROUS MEDIA 有权
    用于多孔介质中流体定量分析的旋转ECHO SPI方法

    公开(公告)号：US20110204892A1

    公开(公告)日：2011-08-25

    申请号：US13003529

    申请日：2009-07-08

    Applicant: Linqing Li ,  Bruce Balcom ,  Derrick Green ,  Oleg PETROV

    Inventor： Linqing Li ,  Bruce Balcom ,  Derrick Green ,  Oleg PETROV

    IPC: G01R33/48

    CPC classification number: G01V3/32 ,  G01N24/081 ,  G01N24/085 ,  G01R33/50 ,  G01R33/5617

    Abstract: A method of measuring a parameter in a sample by imaging at least a portion of the sample using a spin-echo single-point imaging (SE-SPI) pulse sequence. This method involves applying a pure phase encoding to the SE-SPI pulse sequence, acquiring a multiplicity of echoes, and determining the spatially resolved T2 distribution. In another embodiment, individual echoes are separately phase encoded in a multi-echo acquisition and the SE-SPI pulse sequence is a hybrid SE-SPI sequence. In another embodiment, an external force can be used to build up a distribution of saturations in the sample, and a T2 distribution can be measured for the sample, which is then used to determine a parameter of the sample. A spatially resolved T2 distribution can also be measured and a resulting spatially resolved T2 distribution used to determine the T2 distribution as a function of capillary pressure.

    Abstract translation: 一种通过使用自旋回波单点成像（SE-SPI）脉冲序列对样本的至少一部分进行成像来测量样本中的参数的方法。 该方法包括对SE-SPI脉冲序列应用纯相位编码，获取多个回波，以及确定空间分辨的T2分布。 在另一个实施例中，单个回波在多回波采集中单独相位编码，并且SE-SPI脉冲序列是混合SE-SPI序列。 在另一个实施例中，可以使用外力来建立样品中的饱和度分布，并且可以测量样品的T2分布，然后将其用于确定样品的参数。 还可以测量空间分辨的T2分布，并且得到空间分辨的T2分布，用于确定作为毛细管压力的函数的T2分布。

    Methods and apparatus for measuring capillary pressure in a sample
    10.
    发明授权
    Methods and apparatus for measuring capillary pressure in a sample 有权
    用于测量样品中毛细管压力的方法和装置

    公开(公告)号：US07352179B2

    公开(公告)日：2008-04-01

    申请号：US11262658

    申请日：2005-10-31

    Applicant: Quan Chen ,  Bruce Balcom

    Inventor： Quan Chen ,  Bruce Balcom

    IPC: G01V3/00

    CPC classification number: G01R33/44 ,  G01N24/08 ,  G01N24/081 ,  G01N2015/0813 ,  G01R33/54

    Abstract: A method and apparatus are provided for measuring a parameter such as capillary pressure in porous media such as rock samples. The method comprises mounting a sample in a centrifuge such that different portions of the sample are spaced at different distances from the centrifuge axis, rotating the sample about the axis, measuring a first parameter in the different portions of the sample, and determining the value of a second parameter related to the force to which each portion is subjected due to rotation of the sample. In one embodiment, the first parameter is relative saturation of the sample as measured by MRI techniques, and the second parameter is capillary pressure.

    Abstract translation: 提供了一种用于测量诸如岩石样品的多孔介质中诸如毛细管压力之类的参数的方法和装置。 该方法包括将样品安装在离心机中，使得样品的不同部分与离心机轴线不同的距离间隔开，使样品围绕轴线旋转，测量样品的不同部分中的第一参数， 与由于样品的旋转而使每个部分受到的力相关的第二参数。 在一个实施例中，第一参数是通过MRI技术测量的样品的相对饱和度，第二参数是毛细管压力。

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