title: Depth scanning for a conformal ion beam treatment of deep seated tumours.
abstract: Only target-conformal treatment allows one to exploit the advantages of ion beams (the increased dose and high biological efficiency at the end of the particle range) to a maximum extent. Up to now, target-conformal treatments such as spot scanning or intensity-controlled raster scanning have used fast magnetic lateral deflection in one or two directions perpendicular to the beam axis and a slow range variation in the longitudinal axis by active or passive energy variation. The present paper describes a new method for conformal irradiation with a fast intensity-controlled longitudinal scan in the beam direction, called 'depth scanning'. Its advantages and disadvantages will be discussed. First experimental results from depth scanning will be presented.
authors.affiliation: Gesellschaft für Schwerionenforschung, Biophysik, Darmstadt, Germany.
authors.forename: U
authors.initials: U
authors.lastname: Weber
authors.forename: W
authors.initials: W
authors.lastname: Becher
authors.forename: G
authors.initials: G
authors.lastname: Kraft
mesh_terms: D004307:Dose-Response Relationship, Radiation; D006801:Humans; D008954:Models, Biological; D015233:Models, Statistical; D009369:Neoplasms / Q000532:radiotherapy*; D019047:Phantoms, Imaging; D011874:Radiometry; D011880:Radiotherapy Planning, Computer-Assisted; D020266:Radiotherapy, Conformal / Q000295:instrumentation* / Q000379:methods*; D014867:Water
chemical_list: D014867:Water