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Depth scanning for a conformal ion beam treatment of deep seated tumours

2000; IOP Publishing; Volume: 45; Issue: 12 Linguagem: Inglês

10.1088/0031-9155/45/12/309

1361-6560

Uli Weber, W. Becher, Gerhard Kraft,

Nuclear Physics and Applications

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.