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Reconstructing the data obtained by sampling in the phase encoding lines in the area of interest.
重建在所述感兴趣区中的相位编码线采样得到的数据。
Figure 6 shows the illustration of interleaved sampling of the phase encoding in the sequential frames
图6是在相邻几帧中相位编码交错采样的示意图;
The existing several parallel imaging technologies realize the acceleration by regularly reducing the phase encoding lines and restoring the missed data by post-processing, to improve the time resolution or spatial resolution, which is unable to obtain better time resolution and spatial resolution at the same time.
For instance, the phase encoding lines can be further reduced by reducing the size of segments with lower acceleration factors and/or increasing the acceleration factors in the outer segments when the temperature changes faster; so as to achieve higher time resolution.
The following content firstly describes the VD sampling in K-space, the K-space is divided into several segments in the phase encoding direction.
首先介绍K空间VD采样,在相位编码方向上,K空间被分为几个区段。
Applying Inverse Discrete Fourier Transform in the frequency encoding direction of K-space, and selecting the phase encoding lines which contain the area of interest for reconstruction before reconstructing the data obtained by sampling; and
As shown in Figure 6, the lateral axis is the phase encoding direction, the longitudinal axis is time axis, and the signals sampled from the phase encoding lines in the sequent frames on the time axis are interleaved arranged.
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