Early variation of FDG-PET radiomics features in NSCLC is related to overall survival - the "delta radiomics" concept. (15th February 2016) - Carvalho, S.; Leijenaar, R.T.H.; Troost, E.G.C.; van Elmpt, W.; Muratet, J.-P.; Denis, F.; De Ruysscher, D.; Aerts, H.J.W.L.; Lambin, P.