Fig. 5
MR and optical imaging in vitro in NK-92 cells. (A) MRI of NK-92 cells labeled with nanoprobes (a: Fe3O4-PEG-CD56/Avastin@Ce6-labeled NK-92 cells; b: Fe3O4-PEG-CD56/Avastin@Ce6-labeled NK-92 cells). (B) Comparison of the T2WI signal ratio between the different concentrations of Ce6 determined by MRI. (C) Comparison of the T2WI signal ratio between the different nanoprobes determined by MRI. (D) Fluorescence images of NK-92 cells labeled with nanoprobes (a: Fe3O4-PEG-CD56/Avastin@Ce6; b: Fe3O4-PEG- Avastin@Ce6)