RADIATION THERAPY DEVICE AND METHOD FOR GENERATING A RESOLUTION ENHANCEMENT IN IRRADIATED RADIATION-EXPOSURE FIELDS

摘要

The invention relates to a radiation therapy device, comprising: a radiation source, from which for radiation exposure purposes a beam can be directed onto a target volume from at least two opposite directions, a collimator having a plurality of collimator elements for localising the treatment beam in order to generate a radiation-exposure field, wherein the expansion of the collimator elements predetermines a resolution of the radiation-exposure field, and an offset unit, which causes the irradiation of opposing radiation-exposure fields to be effected at an offset such that the two opposing radiation-exposure fields are offset relative to each other by a fraction of the resolution. Furthermore, the invention relates to a method for generating a resolution enhancement in irradiated radiation-exposure fields in a radiation therapy device, comprising the steps of: generating a first radiation-exposure field with the aid of a collimator which delimits a beam emitted from a first spatial direction and which comprises a plurality of collimator elements that predetermine a resolution of the radiation-exposure field; generating a second radiation-exposure field by means of the collimator which delimits a further beam emitted from a second spatial direction, wherein the second radiation-exposure field is offset relative to the first radiation-exposure field by a fraction of the resolution.