The method and applicator for positioning and / or ejecting of radiation sources via hollow needles into biological tissue

The invention relates to a method and an applicator for positioning of radioactive sources, spacers and stoppers (Seeds) into hollow needles and / or for ejecting the same from the hollow needles. DOLLAR A The object of the invention to avoid the known disadvantages of the prior art and to develop a method and an applicator, with which the implanting different Seeds (material, dose, half-life) as well as spacers in the tumor tissue or the positioning of seeds , spacers and stoppers is untersutzt in hollow needles or in devices for the Seedkettenherstellung, to achieve an optimal dose distribution in the tumor tissue after seed implantation is achieved by a method and an applicator, the method being characterized in that different Seeds ( 4) (a magazine changer 9) of the hollow needle (2) are fed, wherein the location (position and orientation) of the needle (2) and the magazine changer (9) relative to a position reference body (13) is measured, and wherein an optimum Seedablageposition ( 23) acoustically and / or visually and / or tactile signals, wherein the selection a magazine (8) and an ejected Seeds (4) from the magazine (8) from the current position of the needle (2) in the fabric (3) and of a relatively in a list with an indication of the seed type and the xyz coordinate to created a position reference body (13) treatment plan for a dosage is derived.