首页>
外国专利>
Method for data acquisition acceleration in magnetic resonance imaging (MRI) with N-dimensional spatial encoding using two or more receiver coil arrays and non-linear phase distributions
Method for data acquisition acceleration in magnetic resonance imaging (MRI) with N-dimensional spatial encoding using two or more receiver coil arrays and non-linear phase distributions
A method for accelerating data acquisition in MRI with N-dimensional spatial encoding has a first method step in which a transverse magnetization within an imaged object volume is prepared having a non-linear phase distribution. Primary spatial encoding is thereby effected through application of switched magnetic fields. Two or more RF receivers are used to simultaneously record MR signals originating from the imaged object volume, wherein, for each RF receiver, an N-dimensional data matrix is recorded which is undersampled by a factor Ri per selected k-space direction. Data points belonging to a k-space matrix which were not recoded by a selected acquisition schema are reconstructed using a parallel imaging method, wherein reference information concerning receiver coil sensitivities is extracted from a phase-scrambled reconstruction of the undersampled data matrix. The method generates a high-resolution image free of artifacts in a time-efficient manner by improving data sampling efficiency and thereby reducing overall data acquisition time.
展开▼
机译:一种用于利用N维空间编码来加速MRI中的数据采集的方法,其具有第一方法步骤,在该方法步骤中,准备具有非线性相位分布的成像对象体内的横向磁化强度。初级空间编码由此通过施加切换磁场来实现。两个或多个RF接收器用于同时记录源自成像对象体积的MR信号,其中,对于每个RF接收器,记录一个N维数据矩阵,该矩阵被低采样系数R i Sub> per选定的k空间方向。使用并行成像方法来重建未被k个空间矩阵编码的,未被选择的采集方案重新编码的数据点,其中,从欠采样数据矩阵的相位加扰重建中提取与接收器线圈灵敏度有关的参考信息。该方法通过提高数据采样效率并由此减少总体数据采集时间,以时间高效的方式生成了无伪影的高分辨率图像。
展开▼