Fig. 6From: Polyethylenimine-based theranostic nanoplatform for glioma-targeting single-photon emission computed tomography imaging and anticancer drug deliverya In vivo SPECT images of the nude mice bearing C6 xenografted tumors treated with mPEI-CTX-99mTc/DOX (T) and mPEI-99mTc/DOX (NT) at different time points of 0.5, 2, 4, 6, 8, and 12Â h, respectively, and b their tumor relative signal intensities. The white arrows point to the tumor sites. c SPECT images of ex vivo tumors at 12Â h post-injectionBack to article page