Method and System for Rapid MRI Acquisition Using Tailored Signal Excitation Modules (RATE)
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    发明申请
    Method and System for Rapid MRI Acquisition Using Tailored Signal Excitation Modules (RATE) 审中-公开
    使用定制信号激励模块(RATE)快速MRI采集的方法和系统

    公开(公告)号:US20140091798A1

    公开(公告)日:2014-04-03

    申请号:US14123186

    申请日:2012-02-23

    发明人: Arjun Arunachalam

    IPC分类号: G01R33/54

    摘要: A system and method for rapid acquisition of MRI data at multiple points in time in an. MRI scan using tailored excitation modules, said method comprising the steps of: obtaining tailored signal excitation modules by using RF excitation pulses in combination with one or more magnetic field gradients; acquiring an aliased k-space dataset at a point in time using a pulse sequence that employs said obtained tailored signal excitation modules, which tag and overlap distinct k-space points; repeating steps (a) and (b) for acquiring aliased k-space datasets at multiple time points in a scan while tagging the overlapped, k-space points as a function of time to obtain an accelerated k-t dataset; undoing k-space aliasing m the acquired k-space datasets by Fourier transforming them along the time axis followed by a filtering process to separate the overlapped points; and performing a Fourier transformation along one or more axes, of the un-aliased k-space datasets to generate image frames for the different time points at which data was acquired.

    摘要翻译: 一种用于在多个时间点快速获取MRI数据的系统和方法。 所述方法包括以下步骤:通过使用RF激励脉冲与一个或多个磁场梯度组合来获得定制的信号激励模块; 使用采用所获得的定制信号激励模块的脉冲序列在某个时间点获取混叠的k空间数据集,该标记和重叠不同的k空间点; 重复步骤(a)和(b),用于在扫描中的多个时间点获取混叠的k空间数据集,同时标记重叠的k空间点作为时间的函数,以获得加速的k-t数据集; 通过对所获取的k空间数据集进行k空间混叠,沿着时间轴对其进行傅立叶变换,然后进行滤波处理以分离重叠点; 以及沿着所述未锯齿的k空间数据集的一个或多个轴执行傅里叶变换,以生成用于获取数据的不同时间点的图像帧。