图4. 仿真图像的重建效果（1帧有2个交错叶，对应全采集轨迹的48个交错叶，欠采样率为24）.四列分别展示帧24、帧42、帧24的差分图和帧42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的重建结果.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.4. Reconstruction results of simulated image (Grouping 2 interleaves for 1 frame, corresponding to 48 interleaves of full sampled track, undersampling rate=24) and their difference maps (7×) with reference. The four columns show frame 24, frame 42, the difference map of frame 24 and the difference map (7×) of frame 42 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