Gamma-tools: A multipurpose phantom for quality assurance in gamma knife stereotactic radiosurgery treatments. Issue 1 (February 2016) - Calusi, S.; Noferini, L.; Casati, M.; Marrazzo, L.; Arilli, C.; Compagnucci, A.; Talamonti, C.; Scoccianti, S.; Greto, D.; Bordi, L.; Livi, L.; Pallotta, S.