| 摘要 |
Methods and systems produce radio-nuclide by colliding a focused electron beam with a target cartridge (20) containing a target material capable of being radio-activated by the energy of the electron beam. The target material is translated relative to the electron beam along at least two axes. In this regard a target cartridge is provided according to the present invention which includes a tubular shelf (20a) formed either of a material which allows interior passage of the electron beam (e.g., aluminum) or of a material which converts the kinetic energy of the electron beam into electromagnetic energy (e.g., tungsten). The tubular shell defines an interior hollow space which houses the target material to be irradiated, e.g., an intraluminal stent. End caps (20c) close each end of the tubular shell, and are preferably one-piece solid structures formed of the same material as that of the tubular shell. The end caps therefore most preferably serve the purposes of allowing the target cartridge to be mechanically coupled to a translator assembly, and provide a path of heat transfer to a heat transfer fluid in contact therewith.
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