利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

63 条记录 (耗时 0.022 秒)

    METHOD AND APPARATUS FOR AUTOMATED TRACKING OF NON-LINEAR VESSEL MOVEMENT USING MR IMAGING
    41.
    发明申请
    METHOD AND APPARATUS FOR AUTOMATED TRACKING OF NON-LINEAR VESSEL MOVEMENT USING MR IMAGING 有权
    使用MR成像自动跟踪非线性运动的方法和装置

    公开(公告)号：US20070167734A1

    公开(公告)日：2007-07-19

    申请号：US11625054

    申请日：2007-01-19

    申请人： Manojkumar Saranathan ,  Christopher Hardy ,  Thomas Foo

    发明人： Manojkumar Saranathan ,  Christopher Hardy ,  Thomas Foo

    IPC分类号： A61B5/05

    CPC分类号： G01R33/56509 ,  A61B5/0037 ,  A61B5/055 ,  A61B5/7285 ,  G01R33/56 ,  G01R33/5673

    摘要： A system and method is disclosed for tracking a moving object using magnetic resonance imaging. The technique includes acquiring a scout image scan having a number of image frames and extracting non-linear motion parameters from the number of image frames of the scout image scan. The technique includes prospectively shifting slice location using the non-linear motion parameters between slice locations while acquiring a series of MR images. The system and method are particularly useful in tracking coronary artery movement during the cardiac cycle to acquire the non-linear components of coronary artery movement during a diastolic portion of the R-R interval.

    摘要翻译： 公开了一种使用磁共振成像跟踪运动物体的系统和方法。 该技术包括获取具有多个图像帧的侦察图像扫描，并从侦察图像扫描的图像帧的数量中提取非线性运动参数。 该技术包括使用切片位置之间的非线性运动参数前进移位切片位置，同时获取一系列MR图像。 该系统和方法在心脏周期期间跟踪冠状动脉运动特别有用，以在R-R间期的舒张期期间获得冠状动脉运动的非线性分量。

    Method and system of MR imaging with simultaneous fat suppression and T1 inversion recovery contrast
    42.
    发明申请
    Method and system of MR imaging with simultaneous fat suppression and T1 inversion recovery contrast 有权
    具有同时脂肪抑制和T1反转恢复对比的MR成像方法和系统

    公开(公告)号：US20070007958A1

    公开(公告)日：2007-01-11

    申请号：US11176718

    申请日：2005-07-07

    申请人： Thomas Foo

    发明人： Thomas Foo

    IPC分类号： G01V3/00

    CPC分类号： G01R33/4828 ,  G01R33/56 ,  G01R33/5601 ,  G01R33/5602 ,  G01R33/5607

    摘要： A method and system for fat suppression with T1-weighted imaging includes a pulse sequence generally constructed to have a non-spectrally selective IR pulse that is played out immediately before a spectrally selective IR tip-up pulse. Thereafter, a fat suppression RF pulse is played out followed by the acquisition of fat-suppressed MR data. The pulse sequence maintains T1 contrast by not perturbing the non-fat signals from the IR preparation. The pulse sequence also ensures that the blood pool signal is homogeneously suppressed from the non-spectrally selective IR RF pulse. The pulse sequence also allows for increased fat suppression and provides flexibility for adjustment of the degree of fat suppression without affecting the view acquisition order for an image acquisition segment.

    摘要翻译： 用于T 1加权成像的脂肪抑制的方法和系统包括通常构造为具有在光谱选择性IR提升脉冲之前立即播放的非光谱选择性IR脉冲的脉冲序列。 此后，进行脂肪抑制RF脉冲，然后获取脂肪抑制MR数据。 脉冲序列通过不干扰来自IR制剂的非脂肪信号来保持T 1对比度。 脉冲序列还确保从非光谱选择性IR RF脉冲均匀抑制血液信号。 脉冲序列还允许增加脂肪抑制，并提供调整脂肪抑制程度的灵活性，而不影响图像采集段的视图采集顺序。