Patent Number: 
Section: claims

1. A radiation delivery device comprising:a rotatable source component including a plurality of radiation sources;a rotatable collimator component comprising a primary collimator body for directing radiation from the radiation sources to a common focal area; anda shielding body, wherein the rotatable source component is positioned within an inner diameter of the primary collimator body, the rotatable source component rotatable independent of the primary collimator body. 2. The radiation delivery device of claim 1, wherein the primary collimator body comprises one or more sets of primary collimator passages for directing the radiation from the radiation sources. 3. The radiation delivery device of claim 2, wherein the rotatable collimator component further comprises at least one additional rotatable collimator body including one or more sets of additional collimator passages for directing the radiation from the radiation sources. 4. The radiation delivery device of claim 3, wherein the additional collimator passages are different than the primary collimator passages in shape and/or size. 5. The radiation delivery device of claim 3, wherein the primary collimator body is arranged within an interior cavity of the additional rotatable collimator body. 6. The radiation delivery device of claim 5, wherein sets of additional collimator passages are arranged at differing radial positions on the additional rotatable collimator body. 7. The radiation delivery device of claim 6, wherein the additional collimator passages arranged at differing radial positions have different shape and/or size. 8. The radiation delivery device of claim 5, wherein the rotatable source component exhibits a non-concentric arrangement with the primary collimator body and/or additional rotatable collimator body. 9. The radiation delivery device of claim 1, wherein the common focal area has a diameter or width of 2 mm to 60 mm. 10. The radiation delivery device of claim 1, wherein the radiation sources are arranged along a curved surface extending along the rotatable source component longitudinal axis. 11. The radiation delivery device of claim 1, wherein the radiation sources comprise radioactive material. 12. The radiation delivery device of claim 11, wherein the radioactive material is selected from the group consisting of cobalt-60, cesium-137 and iridium-192. 13. The radiation delivery device of claim 2, wherein the primary collimator body does not exhibit curvature in a region of the primary collimator passages. 14. The radiation delivery device of claim 3, wherein the one or more sets of additional collimator passages are unequal in number to the primary collimator passages. 15. A method of directing radiation from a plurality of radiation sources to a common focal area comprising:positioning a rotatable source component comprising the radiation sources within an inner diameter of a primary collimator body of a rotatable collimator component, the rotatable source component rotatable independent of the primary collimator body;rotating the rotatable source component from a position of the radiation sources facing a shielding body to a position of the radiation sources facing passages of the primary collimator body; anddirecting the radiation to the common focal area with the primary collimator body. 16. The method of claim 15, wherein the primary collimator body comprises one or more sets of primary collimator passages for directing the radiation. 17. The method of claim 16, wherein the rotatable collimator component further comprises at least one additional rotatable collimator body including one or more sets of additional collimator passages for directing the radiation to the common focal point. 18. The method of claim 17, wherein the additional collimator passages are different than the primary collimator passages in size and/or shape. 19. The method of claim 17, wherein the additional collimator passages differ in number from the primary collimator passages. 20. The method of claim 17, wherein the primary collimator body is arranged within an inner diameter of the additional rotatable collimator body. 21. The method of claim 20, wherein the rotatable source component, primary collimator body and/or additional rotatable collimator body are rotated to align the primary collimator passages and additional collimator passages with the radiation sources. 22. The method of claim 15, wherein the common focal area is located within a patient's body. 23. The method of claim 16, wherein the primary collimator body does not exhibit curvature in a region of the primary collimator passages. 24. The method of claim 17, wherein the one or more sets of additional collimator passages are unequal in number to the primary collimator passages. 25. The method of claim 24, wherein radiation dosage to the common focal area is varied by the unequal number of collimator passages in the one or more additional sets.