CD4 and cancer: In order to determine if the efficacy of anti-cancer therapy canbe assessed at early time points post-DC-vaccination in vivo, primary murine CD4+T cells were radiolabelled ex vivo, injected and non-invasively imaged by SPET/CT.CD4+ T cells from DO11.10-Rag−/− mice were isolated andradiolabelled with 99mTc-HMPAO.