ANPEP and hepatocellular carcinoma: Noninvasive in vivo PET/MRI imaging using 68Ga-NOTA-c(NGR) and 68Ga-DOTA-nitroimidazole—as specific radiolabelled diagnostic molecules—provides an opportunity to the detection of temporal changes of hypoxic regions and neoangiogenic molecule (APN/CD13) expression in hepatocellular carcinoma tumors.