A process for the preparation of a radiation treatment plan, procedures for adapting and optimizing a radiation treatment planning. Treatment planning device and irradiation facility

The invention relates to a method for generating a radiation treatment plan, comprising the steps of: a) providing a set of image data to be irradiated target object, comprising a target volume (14), b) setting an imaged in the imaging data set target volume (14) and a condition to be fulfilled, c) performing an optimization process for determining a set of parameters, with which an irradiation unit (10) is controllable, wherein is optimized in the optimization process of the parameter set to be fulfilled with regard to the condition using the image data set and this calculation steps are carried out, which characterize the effect of the beam on the target object, d) generating a treatment planning data set (40) by the optimized set of parameters is stored in the treatment planning data set (40), and wherein in addition to the optimized set of parameters at least some of the intermediate results, which have been determined for performing the calculation steps in the determination of the optimized parameter set, get saved. Furthermore, the invention relates to methods in which such a treatment planning data set is used. In addition, the invention relates to an appropriately designed treatment planning apparatus and a radiation treatment system of such treatment planning device.