Apparatus and method for dosing a radiation

The invention relates to a method and apparatus for controlling a process on an object (43) directed treatment beam (47). In this case, the method comprises the steps of: a) displaying at least one multi-dimensional image data set, the at least one target area of ​​the object, b) determining the directed to the target area treatment beam dose, c) registering and optionally visualizing a dependent of the treatment beam dose iso-or iso-surface in the multidimensional image data set, d) adjusting the iso (I) or iso-surface in such a way that these approaches as close as possible (to the contour V) of the target area or coincides with the same, e) control of the treatment beam by evaluating the dose adjusted iso-or iso-surface.