A PATTERN RECOGNITION SYSTEM FOR BRAIN TUMOUR GRADE PREDICTION BASED ON HISTOPATHOLOGICAL MATERIAL AND FEATURES EXTRACTED AT DIFFERENT OPTICAL MAGNIFICATIONS. - Konstandinou, Christos; Maneas, Efthymios; Dimitris, Glotsos; Spiros, Kostopoulos; Panagiota, Ravazoula; Cavouras, Dionisis (e-Journal of Science & Technology, 2012)