Among other things, a method for transporting radiation to a body region is described, wherein, in a first step, a canal is formed up to the body region to be irradiated and wherein, in a second step, an applicator (10) which is fitted to the diameter of the canal is introduced into the canal in order to guide a probe tip. Advantageously, applicator (10) is formed for use with a radiation therapy device for producing a defined radiation dose for irradiating a body region, whereby applicator (10) has a base body (11) with a foot region (12) for the uptake of at least one component of a radiation therapy device (30), a cylindrical guide region (13) connecting thereto for the uptake of a probe tip of a radiation therapy device, whereby a transition region (14) is formed between the foot region (12) and the guide region (13), as well as a head region (15), which is formed at the distal end (21) of base body (11). The method can be utilized especially for the treatment of tumors in the vertebral column.