Patent Number: 
Section: claims

1. An applicator means for x-ray radiation therapy for the irradiation of surfaces, having an applicator element for taking up a probe tip or a radiation source element of a radiation source means, is hereby characterized in that the applicator element for adjusting different beam characteristics has at least one element for influencing the beam, which is disposed in an exchangeable manner at/in the applicator element, that the element for influencing the beam is designed as a lens element or as a combination of lens elements, and that the lens element or the combination of lens elements is designed as an element or a combination of elements with a different mass distribution in one plane crosswise to the direction of expansion of the x-ray radiation. 2. The applicator means according to claim 1, further characterized in that the mass distribution of the lens element or of the combination of lens elements is adapted or is adaptable to the radiation characteristic of a radiation source means. 3. The applicator means according to claim 1, further characterized in that the lens element or the combination of lens elements and/or the applicator element has a round, or quadrangular, or octagonal shape, or has a shape adapted to a tumor. 4. The applicator means according to claim 1, further characterized in that the lens element or the combination of lens elements comprises one material or at least two different materials. 5. The applicator means according to claim 1, further characterized in that the lens element or the combination of lens elements has at least one positively curved surface and/or at least one neutral surface and/or at least one negatively curved surface. 6. The applicator means according to claim 1, further characterized in that the applicator element has a first end for positioning on the surface to be irradiated, and that element for influencing the beam is provided in the region of the first end of applicator element. 7. The applicator means according to claim 1, further characterized in that applicator element is designed as a cylinder, at least in regions. 8. A fastening means for fastening an applicator means for x-ray radiation therapy for the irradiation of surfaces, in particular, an applicator means according to claim 1, onto a surface to be treated, is characterized in that the fastening means has an uptake opening for taking up at least one region of applicator means, and that fastening means is designed as a fastening ring. 9. The fastening means according to claim 8, further characterized in that uptake opening has an inner contour, which corresponds to the outer contour of the region of applicator means that is to be taken up. 10. The fastening means according to claim 8, further characterized in that fastening means has at least one outwardly projecting fastening tab on at least one outer side. 11. The fastening means according to claim 10, further characterized in that at least one fastening tab has at least one fastening opening. 12. A radiation therapy device for the x-ray irradiation of surfaces, having a radiation source means and having an applicator means for taking up a probe tip or a radiation source element of the radiation source means, wherein the applicator element for adjusting different beam characteristics has at least one element for influencing the beam, which is disposed in an exchangeable manner at/in the applicator element, that the element for influencing the beam is designed as a lens element or as a combination of lens elements, and that the lens element or the combination of lens elements is designed as an element or a combination of elements with a different mass distribution in one plane crosswise to the direction of expansion of the x-ray radiation and/or having a fastening means according to claim 8 for attaching an applicator means for x-ray radiation therapy onto a surface to be treated. 13. The applicator means according to claim 1, further characterized in that the lens element or the combination of lens elements has a plane surface at its outer face.