Concurrent Dual Contrast for Cellular Magnetic Resonance Imaging Using Gadolinium Oxide and Iron Oxide Nanoparticles

Table 3

Effect of SPIO incubation concentration on MR relaxation times and cell function.

Incubation medium [Fe] (mM)	Measured MR relaxation times		Cell function assays
	T 1 (ms)	T 2 (ms)	Viability (%)	Proliferation (%)
0	2166±135	85.7±9.0	100±14	100±18
0.0036	1263±193	16.1±2.6	96±19	92±8
0.009	828±127	12.6±0.6	96±15	96±19
0.018	613±65	11.3±0.6	95±13	89±12
0.036	630±60	10.9±0.5	86±16	84±15