Fig. 10:

(a) Setup of targets in saline tank for imaging at multiple frequencies. (b)-(f) Performance of ACT5 through multiple frequencies. The difference images show a PVC target and two copper targets, one polished and one unpolished. The susceptivity images show the copper targets as capacitive at lower frequencies and inductive at higher frequencies. The PVC target is neither capacitive nor inductive at lower frequencies but turns capacitive at higher frequencies.