Exploring feature-based approaches in PET images for predicting cancer treatment outcomes. - Issam El-Naqa; Perry Grigsby; Aditya P. Apte; Elizabeth Kidd; Eric Donnelly; Divya Khullar; Summer Chaudhari; Deshan Yang; Martin Schmitt; Richard Laforest; Wade L. Thorstad; Joseph Deasy (Pattern Recognit., 2009)