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    • 2. 发明申请
    • METHOD OF PARALLEL MAGNETIC RESONANCE IMAGE PROCESSING
    • 平行磁共振图像处理方法
    • WO2008151380A1
    • 2008-12-18
    • PCT/AU2008/000852
    • 2008-06-13
    • MONASH UNIVERSITYZHANG, JingxinCHEN, Zhaolin
    • ZHANG, JingxinCHEN, Zhaolin
    • G01R33/20G01R33/3415G01R33/48
    • G01R33/5611
    • A method, an apparatus, and a computer-implemented system are provided for performing reconstruction of an image of a subject within a magnetic resonance imaging (MRI) machine having a plurality of receiver coils. In particular, parallel magnetic resonance imaging (pMRI) reconstruction is performed by receiving pMRI signal data comprising digitised samples acquired from the receiver coils of the MRI machine. A dynamic input-output system of a pMRI detection process of the MRI machine is constructed, wherein the model embodies a plurality of estimated spatial sensitivity functions corresponding with each of the plurality of receiver coils. An inverse model is determined, which corresponds with the system model, using an optimisation method which is adapted to minimise a measure of reconstruction error. More particularly, the measure of reconstruction error accounts for accuracy of image reconstruction by the inverse model in the absence of additive noise and estimation error, in combination with amplification by the inverse model of additive noise and estimation error. An image of the subject is reconstructed by applying the inverse model to the pMRI signal data. A reconstructed image output may then be provided to a user.
    • 提供了一种方法,装置和计算机实现的系统,用于在具有多个接收器线圈的磁共振成像(MRI)机器内执行对象的图像重建。 特别地,并行磁共振成像(pMRI)重建通过接收包括从MRI机的接收器线圈获取的数字化样本的pMRI信号数据来执行。 构造MRI机器的pMRI检测处理的动态输入输出系统,其中,该模型体现与多个接收线圈中的每一个对应的多个估计的空间灵敏度函数。 使用适于最小化重建误差的度量的优化方法来确定对应于系统模型的逆模型。 更具体地,重建误差的量度考虑到在没有加性噪声和估计误差的情况下通过逆模型的图像重建的精度,以及通过加法噪声和估计误差的逆模型的放大。 通过将逆模型应用于pMRI信号数据来重建对象的图像。 然后可以向用户提供重建的图像输出。