Quantitative Evaluation of Temporal Regularizers in Compressed Sensing Dynamic Contrast Enhanced MRI of the Breast

Figure 6

Difference plots of tumor mean intensity curves (a) and voxel intensity curves (b) in tumor area. Here the coordinate of the voxel is (96, 96). Panel (a) shows that the zero-filled reconstruction underestimated the mean intensity after CA injection. WT underestimated the mean intensity over all the dynamics. FT failed to capture the mean intensity curve in the first and last 5 dynamics. TV and best fit the mean intensity curve. NN overestimated the intensity curve before the CA injection and slightly underestimated the intensity curve after the CA injection. Panel (b) shows that zero-filled reconstruction underestimated the voxel intensity after the CA injection. FT and WT oscillated with large amplitude, showing an inaccurate approximation. Both TV and reconstructions fluctuated less. NN overestimated the signal in the preinjection period.

(a)

(b)