Fig. 7From: Chlorotoxin peptide-functionalized polyethylenimine-entrapped gold nanoparticles for glioma SPECT/CT imaging and radionuclide therapyIn vivo SPECT images of the rat intracranial glioma model treated with a 131I-Au PENPs-CTX and b 131I-Au PENPs at different time points of 0.5, 2, 4, 6, 8 and 16 h, respectively, and c their tumor-to-background ratios (TBR) of the SPECT signal intensities in the brains. d SPECT images of ex vivo brains at 16 h postinjectionBack to article page