Method and magnetic resonance tomography apparatus for triggered acquisition of magnetic resonance data
    21.
    发明授权
    Method and magnetic resonance tomography apparatus for triggered acquisition of magnetic resonance data 有权
    用于触发获取磁共振数据的方法和磁共振断层摄影装置

    公开(公告)号:US08519706B2

    公开(公告)日:2013-08-27

    申请号:US12770887

    申请日:2010-04-30

    IPC分类号: G01V3/00

    摘要: In a method and magnetic resonance tomography apparatus for triggered implementation of a measurement (composed of partial measurements) in the magnetic resonance tomography apparatus, at least one image data set is determined from the data acquired within the scope of the partial measurements, and for triggering a reference point of the movement phase of the movement is used. The image data set is acquired in segments; the reference point is detected by a control device independent of a partial measurement, and the partial measurement following the detected reference point is conducted depending on the independently detected reference point. The wait time that specifies the interval from the end of the partial measurement to the beginning of the next partial measurement is adapted depending on the point in time of detection.

    摘要翻译: 在用于在磁共振断层摄影装置中触发执行测量(由部分测量组成)的方法和磁共振断层摄影装置中,根据在部分测量的范围内获取的数据确定至少一个图像数据集,并且用于触发 使用运动的运动相位的参考点。 图像数据集以片段获取; 参考点由独立于部分测量的控制装置检测,并且根据独立检测的参考点进行检测到的参考点之后的部分测量。 指定从部分测量结束到下一个部分测量开始的间隔的等待时间根据检测时间点进行调整。

    Practical image reconstruction for magnetic resonance imaging
    22.
    发明授权
    Practical image reconstruction for magnetic resonance imaging 有权
    磁共振成像的实用图像重建

    公开(公告)号:US07903858B2

    公开(公告)日:2011-03-08

    申请号:US11926912

    申请日:2007-10-29

    IPC分类号: G06K9/00 A61B5/05

    摘要: A set of image-space data is reconstructed from a set of k-space data. The set of image-space data is generated by minimizing a cost functional by an iterative non-linear conjugate gradient process. The iterative process may be accelerated by introducing k-space weighting to the cost functional. With proper choice of k-space weighting, a block-Toeplitz matrix is generated which permits use of Fast Fourier Transform techniques. An image is rendered from the set of image-space data.

    摘要翻译: 从一组k空间数据重建一组图像空间数据。 通过使迭代非线性共轭梯度过程的功能最小化来生成图像空间数据集合。 可以通过向成本函数引入k空间加权来加速迭代过程。 通过适当选择k空间加权,生成块Toeplitz矩阵,其允许使用快速傅里叶变换技术。 从图像空间数据集中呈现图像。

    Practical Image Reconstruction for Magnetic Resonance Imaging
    23.
    发明申请
    Practical Image Reconstruction for Magnetic Resonance Imaging 有权
    磁共振成像实用图像重建

    公开(公告)号:US20080107319A1

    公开(公告)日:2008-05-08

    申请号:US11926912

    申请日:2007-10-29

    IPC分类号: G06K9/00

    摘要: A set of image-space data is reconstructed from a set of k-space data. The set of image-space data is generated by minimizing a cost functional by an iterative non-linear conjugate gradient process. The iterative process may be accelerated by introducing k-space weighting to the cost functional. With proper choice of k-space weighting, a block-Toeplitz matrix is generated which permits use of Fast Fourier Transform techniques. An image is rendered from the set of image-space data.

    摘要翻译: 从一组k空间数据重建一组图像空间数据。 通过使迭代非线性共轭梯度过程的功能最小化来生成图像空间数据集合。 可以通过向成本函数引入k空间加权来加速迭代过程。 通过适当选择k空间加权,生成块Toeplitz矩阵,其允许使用快速傅里叶变换技术。 从图像空间数据集中呈现图像。

    Method for imaging of a periodically-moving subject region of a subject
    24.
    发明申请
    Method for imaging of a periodically-moving subject region of a subject 审中-公开
    拍摄对象的周期性移动的被摄体区域的成像方法

    公开(公告)号:US20060241379A1

    公开(公告)日:2006-10-26

    申请号:US11324376

    申请日:2006-01-03

    IPC分类号: A61B5/05

    摘要: In a method for imaging a periodically-moving subject region of a subject, an overview image data set is initially obtained that maps a movement of the subject region, at least two positions that the subject region assumes at corresponding points in time are marked in the overview image, further positions of the subject region at further points in time are interpolated from the marked positions and further points in time, and a subsequent diagnostic imaging of the moving subject region is implemented using the marked and interpolated positions.

    摘要翻译: 在用于成像对象的周期性移动的被摄体区域的方法中,首先获得映射被摄体区域的移动的概览图像数据集,在对象区域在相应的时间点呈现的至少两个位置被标记在 在标记的位置和进一步的时间点内插进一步的时间点的主题区域的其他位置,并且使用标记和内插位置来实现移动对象区域的后续诊断成像。

    Methods and apparatus for measuring flow velocity in a wellbore using NMR and applications using same

    公开(公告)号:US06642715B2

    公开(公告)日:2003-11-04

    申请号:US10242588

    申请日:2002-09-12

    IPC分类号: G01V300

    摘要: The present invention provides methods and apparatus for determining flow velocity within a formation utilizing nuclear magnetic resonance (NMR) techniques in which the shape of the resonance region is restricted so that sensitivity to radial flow or vertical flow is obtained (or both when more than one NMR tool is used). Flow velocity using these NMR tools is determined using decay amplitude, frequency displacement or stimulated echoes (where the spins are stored along the magnetic field instead of the transverse plane to exploit echo decays and frequency displacements) based on the application of adiabatic pulses. Based on the described NMR measurement of flow velocity, additional wellbore parameters may be obtained such as a direct measurement of permeability, an assessment of drilling damage to the wellbore, formation pressure, invasion rate of the mud filtrate or the migration of fine mud particles during sampling operations.

    Preconditioning spins near a nuclear magnetic resonance region
    27.
    发明授权
    Preconditioning spins near a nuclear magnetic resonance region 有权
    核磁共振区附近的预处理旋转

    公开(公告)号:US06492809B1

    公开(公告)日:2002-12-10

    申请号:US09205965

    申请日:1998-12-04

    IPC分类号: G01V300

    CPC分类号: G01V3/32 G01N24/081

    摘要: A method and an apparatus for obtaining NMR measurements are disclosed. An NMR measurement apparatus, the measured sample, or both elements may be subjected to motion during the measurement. The envelope of an RF carrier signal is modulated according to an envelope to generate a first sequence of RF pulses. The envelope, the phase of the RF signal, and/or a static magnetic field may be varied during the radiation of the first sequence to substantially saturate a first region of the sample. The first sequence may include additional RF refocusing pulses that, when coupled with movement of the NMR measurement apparatus or sample, may also be used to substantially saturate the first region. A second sequence of RF pulses is radiated to establish a resonance region within the first region and measure an attribute of the sample.

    摘要翻译: 公开了一种用于获得NMR测量的方法和装置。 NMR测量装置,测量的样品或两个元件可以在测量期间进行运动。 RF载波信号的包络根据包络被调制以产生第一序列的RF脉冲。 可以在第一序列的辐射期间改变包络线,RF信号的相位和/或静态磁场,以使样本的第一区域基本上饱和。 第一序列可以包括附加的RF重聚焦脉冲,当与NMR测量装置或样品的移动相结合时,也可以使其用于基本饱和第一区域。 辐射第二序列的RF脉冲以在第一区域内建立共振区域并测量样品的属性。

    Process for producing surface-sealed hollow glass containers having a high use strength
    28.
    发明授权
    Process for producing surface-sealed hollow glass containers having a high use strength 失效
    具有高使用强度的表面密封中空玻璃容器的制造方法

    公开(公告)号:US06403175B1

    公开(公告)日:2002-06-11

    申请号:US09387721

    申请日:1999-09-01

    IPC分类号: B05D302

    摘要: A process for producing surface-sealed hollow glass containers, the hollow glass containers are, in the production process in the region of the exit from the annealing lehr which is located downstream of a machine for producing hollow glass containers, coated by means of a water-based cold end coating composition comprising at least the following components: I. a trialkoxysilane, a dialkoxysilane and/or a tetralkoxysilane or their hydrolysis and/or condensation products and also II. a water-soluble or water-dispersible mixture of a polyol and a crosslinker, wherein the applied layer of the cold end coating composition is subsequently subjected to a crosslinking step. The hollow glass containers produced in this way have an improved strength.

    摘要翻译: 一种生产表面密封的中空玻璃容器的方法,该中空玻璃容器在退火退火炉出口区域的生产过程中,该退火炉是位于用于制造中空玻璃容器的机器的下游,用水 的冷端涂料组合物,其至少包含以下组分:I。 三烷氧基硅烷,二烷氧基硅烷和/或四氮烷氧基硅烷或其水解和/或缩合产物,以及II。 多元醇和交联剂的水溶性或水分散性混合物,其中冷端涂料组合物的涂覆层随后进行交联步骤。 以这种方式生产的中空玻璃容器具有改进的强度。

    Method for obtaining NMR bound fluid volume using partial polarization
    29.
    发明授权
    Method for obtaining NMR bound fluid volume using partial polarization 失效
    使用部分极化获得NMR结合流体体积的方法

    公开(公告)号:US06232778B1

    公开(公告)日:2001-05-15

    申请号:US09096320

    申请日:1998-06-11

    IPC分类号: G01V300

    CPC分类号: G01V3/32 G01N24/081

    摘要: The present invention provides methods for determining the bound fluid volume (BFV) of a formation utilizing nuclear magnetic resonance (NMR) techniques in which less than full polarization occurs and in which less than a complete NMR distribution is acquired. The effect of the polarizing static magnetic field is shortened in time by applying a shortened wait time between NMR measurements so that only the bound fluid of the formation is polarized. The shortened wait time is effectuated by early application of the oscillating magnetic field to the formation which, in conjunction with a limited number of refocusing pulses, induces signals in the formation that are measured by the NMR tool. The peak amplitude of these signals corresponds to the BFV. The present invention provides information so that a partial polarization calculation curve in T2 lies almost equally between an empirical tapered cutoff curve and a theoretical tapered cutoff curve. Moreover, because no T2 information must be acquired, the method is especially suited for logging-while-drilling operations, where the drill string moves uncontrollably during the NMR measurement.

    摘要翻译: 本发明提供使用核磁共振(NMR)技术测定地层的结合流体体积(BFV)的方法,其中发生少于全极化,并且其中获得小于完整的NMR分布。 通过在NMR测量之间施加缩短的等待时间来缩短偏振静磁场的效果,使得只有结合的结构的流体被极化。 缩短的等待时间是通过将振荡磁场早期应用于地层来实现的,其结合有限数量的重聚焦脉冲,通过NMR工具测量地层中的信号。 这些信号的峰值幅度对应于BFV。 本发明提供信息,使得T2中的部分极化计算曲线几乎等同于经验锥形截止曲线和理论锥形截止曲线之间。 此外,由于不能获得T2信息,所以该方法特别适用于在钻井操作期间的钻井操作,其中钻柱在NMR测量期间不受控制地移动。

    Method to generate an MR image, and corresponding magnetic resonance system
    30.
    发明授权
    Method to generate an MR image, and corresponding magnetic resonance system 有权
    生成MR图像的方法和相应的磁共振系统

    公开(公告)号:US09146291B2

    公开(公告)日:2015-09-29

    申请号:US13667105

    申请日:2012-11-02

    申请人: Peter Speier

    发明人: Peter Speier

    IPC分类号: G01V3/00 G01R33/48

    CPC分类号: G01R33/4818 G01R33/4824

    摘要: To generate an MR image, acquired MR data are entered into k-space on multiple uniform trajectories in k-space within a predetermined time period. The trajectories are acquired chronologically in a predetermined order before a predetermined point in time, and in a different order after the point in time. The i-th trajectory after the point in time in the different order is adjacent to the (n−i+1)-th trajectory in the predetermined order (n is the number of trajectories acquired before and after the point in time). Two trajectories are adjacent if a distance between them is less than a predetermined threshold. Except for the (n−i+1)-th trajectory, none of the trajectories acquired before the point in time has a distance from the i-th trajectory that is less than the threshold. The predetermined time period is set to be at a middle of a time period after an RF excitation pulse, such that a contrast change within the predetermined time period proceeds as linearly as possible over time.

    摘要翻译: 为了生成MR图像,在预定时间段内,将获取的MR数据输入到k空间中的多个均匀轨迹上的k空间中。 这些轨迹是按照预定顺序在预定时间点之前按时间顺序获取的,并且在时间点之后以不同的顺序获取。 在不同顺序的时间点之后的第i个轨迹以预定顺序与第(n-1 + 1)个轨迹相邻(n是在时间点之前和之后获取的轨迹数)。 如果它们之间的距离小于预定阈值,则两个轨迹相邻。 除了第(n-1 + 1)轨迹之外,在时间点之前没有获得的轨迹具有小于阈值的第i个轨迹的距离。 预定时间段被设置为在RF激励脉冲之后的时间段的中间,使得在预定时间段内的对比度改变随着时间线性地进行。