Fig. 2From: Magnetic core–shell nanowires as MRI contrast agents for cell trackingT2 parametric maps (2D slices showing the section) of tubes filled with APTES-NWs aqueous solutions at five different concentrations (x-axis), acquired at five selected time points (y-axis) in a 7 T MRI. The first column at the left side contains HPLC grade water and was used as a controlBack to article page