This invention relates to the use of a unique apparatus and method for extracting radioactive components from liquids, such as electrophoresis buffers. In the present invention, the radioactive liquid is pumped or transported by other suitable means and is passed through a cartridge having an elongated chamber that contains an exchange medium. The exchange medium, i.e. exchange resin, is contained within the elongated chamber between an upper frit and a lower frit. Further, the cartridge has a m...

The invention provides a method for recovering metal beryllium from waste beryllium that has become radioactive in the reaction with neutrons, by converting the radioactive beryllium to halogenated beryllium with a halogen gas such as chlorine, bromine or iodine, and subsequently submitting the halogenated beryllium to thermal decomposition. In this way, the invention allows effective recovery of metal beryllium from waste, radioactive beryllium, thereby reducing production of radioactive wastes...

A process for treating a radioactive waste, includes drying a radioactive waste containing a radioactive substance(s) and a sodium compound(s), to convert it into a dried material, heating the dried material to convert it into a molten salt, and subjecting the molten salt to electrolysis using the salt as an anolyte and .beta.-alumina as a sodium ion-permeable membrane. This process can recover metallic sodium or sodium hydroxide, each of extremely low radioactivity from a radioactive waste cont...

Disclosed is a radioactive tubular prosthesis formed by rolling a flexible sheet around a longitudinal axis. Preferably, the prosthesis is self expandable under the radially outwardly directed spring bias of the rolled sheet. At least a portion of the sheet is provided with a coating comprising at least one radioisotope.

Disclosed are novel radioactive compositions which are particularly suited for treating solid mass tumors via catheter delivery.

A radioactive substance administrator including a syringe structured to receive a dosage of the radioactive substance therein; a containment housing structured to contain the syringe and including a radioactivity retardant material, structured to substantially attenuate the emergence of radioactivity through the containment housing, and a plunger track structured to contain a plunger assembly of the syringe movably therein; an exterior actuation assembly operatively associated with the containme...

In the method of this invention, a radioactive isotope, for example, U.sup.238, is placed within a region. High-energy electrons or high-energy photons in the form of X-rays, gamma rays, or laser excitation are applied to the region. This energy is absorbed by the nucleus of the isotope, placing the nucleus in an excited state. Upon relaxation, the nucleus ejects a neutron, or neutrons, through the gamma-neutron reaction, resulting in a product isotope, namely U.sup.235.

A radiation shield assembly (30) for a radioactive stent (11) which includes a first shield member (31) having a first mating surface (32) and a second shield member (33) having an opposed second mating surface (35). When the two shield members are removably coupled to one another, the first mating surface (32) cooperates with the opposing second mating surface (35) to substantially radially enclose the stent (11) therebetween, and substantially prevent the direct passage of radioisotopes emitte...

A radioactive seed handling device having a base and a needle rack removably attached to the base for holding a plurality of needles generally parallel in a single plane while radioactive seeds are dropped into the needles. The needle rack includes a front shield for shielding an operator from radiation emitted from needles in the rack. The device may also include a vacuum source and a seed handling wand connected to the vacuum source by a conduit, with the wand having a handle and a probe. The ...

Radioactive therapeutic seeds include a substantially cylindrical capsule containing a radioactive isotope and, preferably, a radiopaque marker. According to one embodiment, the capsule is made of titanium or stainless steel, the isotope is deposited on the surface of a hollow cylinder and a titanium or stainless steel tube is disposed inside the hollow cylinder. The capsule is sealed by swaging the end of the capsule against the inner tube and welding the swaged end and tube. The inner tube fac...