Self-calibration methods for parallel imaging and multipoint water-fat separation methods
    3.
    发明授权
    Self-calibration methods for parallel imaging and multipoint water-fat separation methods 有权
    用于平行成像和多点水脂分离方法的自校准方法

    公开(公告)号:US07486074B2

    公开(公告)日:2009-02-03

    申请号:US11738340

    申请日:2007-04-20

    IPC分类号: G01V3/00

    摘要: A method for generating a self-calibrating parallel multiecho magnetic resonance image is provided. A magnetic resonance imaging excitation is applied. A first echo at a first echo time in a first pattern is acquired. A second echo at a second echo time different from the first echo phase in a second pattern different from the first pattern is acquired. The acquired first echo and acquired second echo are used to generate an image in an image pattern, wherein none of the acquired echoes for generating the image have the same pattern as the image pattern.

    摘要翻译: 提供了一种用于产生自校准并联多环磁共振图像的方法。 应用磁共振成像激励。 获取第一模式中的第一回波时间的第一回波。 在与第一图案不同的第二图案中与第一回波相位不同的第二回波时间获得第二回波。 获取的第一回波和获取的第二回波用于产生图像图案中的图像,其中用于生成图像的所获取的回波都不具有与图像图案相同的图案。

    CALIBRATION MAPS FOR PARALLEL IMAGING FREE OF CHEMICAL SHIFT ARTIFACT
    4.
    发明申请
    CALIBRATION MAPS FOR PARALLEL IMAGING FREE OF CHEMICAL SHIFT ARTIFACT 有权
    用于平行成像的校准程序,无需化学转换艺术

    公开(公告)号:US20070247154A1

    公开(公告)日:2007-10-25

    申请号:US11738352

    申请日:2007-04-20

    IPC分类号: G01V3/00

    摘要: A method for generating a calibrated parallel magnetic resonance image is provided in a manifestation of the invention. A magnetic resonance imaging excitation is applied. A plurality of echoes at different echo times (TE) is acquired. The acquired plurality of echoes from different echo times is used to create a chemical shift corrected calibration map.

    摘要翻译: 在本发明的表现中提供了用于产生校准的并联磁共振图像的方法。 应用磁共振成像激励。 获取不同回波时间(TE)的多个回波。 使用从不同回波时间获取的多个回波来创建化学位移校正校准图。

    Reduction of NMR artifacts caused by time varying linear geometric
distortion
    5.
    发明授权
    Reduction of NMR artifacts caused by time varying linear geometric distortion 失效
    由时变线性几何失真引起的NMR伪影的减少

    公开(公告)号:US5200700A

    公开(公告)日:1993-04-06

    申请号:US620177

    申请日:1990-11-30

    IPC分类号: G01R33/567

    CPC分类号: G01R33/5673 G01R33/5676

    摘要: NMR image data acquired from a human subject is corrected for view-to-view motion caused by respiration. As each view is acquired the position of the subject is also measured to indicate the distance of the anterior abdominal wall from a reference position. The acquired NMR image data is corrected using the associated measured distances and a simplified model of the motion.

    摘要翻译: 校正从人类受试者获得的NMR图像数据,以便由呼吸引起的视野观察运动。 当获取每个视图时,还测量受试者的位置以指示前腹壁距离参考位置的距离。 使用相关的测量距离和运动的简化模型来校正所获取的NMR图像数据。

    Method for monitoring respiration with acquired NMR data
    7.
    发明授权
    Method for monitoring respiration with acquired NMR data 失效
    用获取的NMR数据监测呼吸的方法

    公开(公告)号:US4994743A

    公开(公告)日:1991-02-19

    申请号:US427401

    申请日:1989-10-27

    CPC分类号: G01R33/5676 A61B6/541

    摘要: NMR data indicative of the motion of the anterior abdominal wall of a subject is acquired just prior to each image data pulse sequence in an NMR scan. The acquired motion NMR data is processed on-line to produce a signal indicative of the displacement of the abdominal wall from a reference position. The displacement values may be employed to produce a signal indicative of a respiration phase that can be used in connection with motion artifact reduction techniques.

    摘要翻译: 在NMR扫描中刚好在每个图像数据脉冲序列之前获取指示受试者前腹壁运动的NMR数据。 获取的运动NMR数据在线处理以产生指示腹壁与参考位置的位移的信号。 可以使用位移值来产生指示呼吸相位的信号,该呼吸相位可以与运动假象减少技术结合使用。

    Method for measuring and imaging fluid flow
    8.
    发明授权
    Method for measuring and imaging fluid flow 失效
    流体流量测量和成像方法

    公开(公告)号:US4777957A

    公开(公告)日:1988-10-18

    申请号:US744926

    申请日:1985-06-14

    摘要: A time-of-flight magnetic resonance pulse sequence is used to detect arterial flow in an image of a slice of tissue. By timing the pulse sequence with the cardiac cycle and by holding the interpulse interval T.sub.I within time limits which ensure enhancement without significant change in flow velocity, arterial flow can be imaged. By triggering the pulse sequence from the QRS complex representative of the beginning of a body's cardiac cycle and delaying both excitation and detection pulses in the sequence by a time T.sub.A to ensure the pulses occur while flow is slow, MR signal data is generated which results in an image showing enhancement in the areas of arterial flow. In an extension of the foregoing, a second set of MR signal data is generated by adjusting the acquisition delay T.sub.A such that the excitation and detection pulses of a second sequence occur while arterial flow is fast. In the image formed from this second set of data, the increased arterial flow velocity decreases the enhanced image of the arteries. The images generated from the MR signals of the first and second sequences may be subtracted in order to give a single high contrast image showing only arterial flow.

    摘要翻译: 使用飞行时间磁共振脉冲序列来检测组织切片的图像中的动脉血流。 通过用心动周期对脉冲序列进行定时,并且通过将脉冲间隔TI保持在时间限度内,确保增强而没有流速的显着变化,可以成像动脉血流。 通过从代表身体心动周期开始的QRS复合物触发脉冲序列,并延迟序列中的激励和检测脉冲的时间TA,以确保在流动缓慢时发生脉冲,产生MR信号数据,这导致 显示动脉血流量增加的图像。 在上述的扩展中,通过调整采集延迟TA来产生第二组MR信号数据,使得在动脉流快时发生第二序列的激发和检测脉冲。 在由第二组数据形成的图像中,增加的动脉血流速度降低了动脉的增强图像。 可以减去从第一和第二序列的MR信号产生的图像,以便给出仅显示动脉血流的单个高对比度图像。

    SELF-CALIBRATION METHODS FOR PARALLEL IMAGING AND MULTIPOINT WATER-FAT SEPARATION METHODS
    9.
    发明申请
    SELF-CALIBRATION METHODS FOR PARALLEL IMAGING AND MULTIPOINT WATER-FAT SEPARATION METHODS 有权
    用于平行成像和多点水分离方法的自校准方法

    公开(公告)号:US20080012565A1

    公开(公告)日:2008-01-17

    申请号:US11738340

    申请日:2007-04-20

    IPC分类号: G01V3/00

    摘要: A method for generating a self-calibrating parallel multiecho magnetic resonance image is provided. A magnetic resonance imaging excitation is applied. A first echo at a first echo time in a first pattern is acquired. A second echo at a second echo time different from the first echo phase in a second pattern different from the first pattern is acquired. The acquired first echo and acquired second echo are used to generate an image in an image pattern, wherein none of the acquired echoes for generating the image have the same pattern as the image pattern.

    摘要翻译: 提供了一种用于产生自校准并联多环磁共振图像的方法。 应用磁共振成像激励。 获取第一模式中的第一回波时间的第一回波。 在与第一图案不同的第二图案中与第一回波相位不同的第二回波时间获得第二回波。 获取的第一回波和获取的第二回波用于产生图像图案中的图像,其中用于生成图像的所获取的回波都不具有与图像图案相同的图案。