An Efficient T₁ Contrast Agent for Labeling and Tracking Human Embryonic Stem Cells on MRI

Figure 5

Phenotype of hESCs on light microscopy. Bright-field images of human embryonic stem cell colonies: (a) unlabeled control cells, (b) 10 μM, 24 h, and (c) 40 μM, 30 min directly after labeling and 24, 48, and 72 h postlabeling. Colony shape and cell morphology were unchanged after labeling (4x magnification).