title: Repeated CT examinations in limited volume irradiation of brain tumors: quantitative analysis of individualized (CT-based) treatment plans.
abstract: Deviations of the position of the isocenter were quantitatively assessed for CT-based limited volume irradiation of brain tumors. Of the linear deviations, 95% were within 10 mm and 3 mm during treatment planning and delivery, respectively. The application of face masks before CT planning improved the accuracy of field alignment. Repeated CT examinations seemed to be more important after simulation than during treatment delivery.
authors.affiliation: Department of Radiotherapy, University of Tübingen, Germany.
authors.forename: R D
authors.initials: RD
authors.lastname: Kortmann
authors.forename: C F
authors.initials: CF
authors.lastname: Hess
authors.forename: R
authors.initials: R
authors.lastname: Jany
authors.forename: M
authors.initials: M
authors.lastname: Bamberg
mesh_terms: D001932:Brain Neoplasms / Q000000981:diagnostic imaging* / Q000532:radiotherapy*; D006801:Humans; D011880:Radiotherapy Planning, Computer-Assisted / Q000379:methods*; D014057:Tomography, X-Ray Computed