图3. 仿真图像的重建效果（1帧有4个交错叶，对应全采集轨迹的48个交错叶，欠采样率为12）.四列分别展示帧12、帧21、帧12的差分图和帧21的差分图（7×）.(a)图为模拟体模的参考图像，(b)~(d)分别为使用TRACER、基于l₁最小化的CS和基于l₀最小化的CS方法的重建图像.方框中的区域显示了体模的细节结构，这些被放大并置于每个图像的左上方

Fig.3. Reconstruction results of simulated image (Grouping 4 interleaves for 1 frame, corresponding to 48 interleaves of full sampled track, undersampling rate = 12) and their difference maps (7×) with reference. The four columns show frame 12, frame 21, the difference map of frame 12 and the difference map of frame 21, respectively. Figure (a) shows the reference images of the simulation phantom. Figures (b)~(d) show the reconstruction results using TRACER, CS with l₁ minimization and l₀ minimization respectively. The boxes indicate the regions of the detailed structure in the phantom, and the regions are zoomed in and placed on the top left side of each image