Fig. 4From: Biodegradable and biocompatible exceedingly small magnetic iron oxide nanoparticles for T1-weighted magnetic resonance imaging of tumorsA, B Cytotoxicity of ES-MION9, commercial Gadavist or Magnevist on 4T1 cells or MCF-7 cells. Mean ± SD, n = 4. C LSCM images of 4T1 cells treated with ES-MION9@R6G for 2.0 h. The cytoskeleton is green due to the phalloidin-FITC staining, and the nucleus is blue due to the DAPI stainingBack to article page