title: In reply to Skrobala and Malicki.
authors.affiliation: Chair of Radiotherapy, Department of Translational Medicine, University of "Piemonte Orientale", Novara, Italy. Electronic address: krengli@med.unipmn.it.
authors.forename: Marco
authors.initials: M
authors.lastname: Krengli
authors.affiliation: Department of Radiotherapy, University Hospital "Maggiore della Carità", Novara, Italy.
authors.forename: Laura
authors.initials: L
authors.lastname: Masini
authors.affiliation: Department of Medical Physics, University Hospital "Maggiore della Carità", Novara, Italy.
authors.forename: Gianfranco
authors.initials: G
authors.lastname: Loi
mesh_terms: D001932:Brain Neoplasms / Q000601:surgery*; D006801:Humans; D010315:Particle Accelerators; D016634:Radiosurgery / Q000295:instrumentation* / Q000379:methods*