Fig. 4From: Self-Assembled Superparamagnetic Iron Oxide Nanoclusters for Universal Cell Labeling and MRIEffect of the SPIO nanoclusters on cell viability. The cell viability of NIH3T3, Raw264.7, and HepG2 cells labeled with the SPIO nanoclusters (2.5, 5, 10, and 20 μg/ml) at 24 h using MTS assayBack to article page