Loading patent…
AssigneeBebig Isotopentechnik und Umweltdiagnostik GmbH
InventorsWerner Schmidt, Renate Freudenberger, Michael Andrassy, Jürgen Ziegler, Detlev Behrendt, Andre Hess
Estimating the term…
The invention relates to radioactive ruthenium sources with a dosage rate of at least 1.5 Gy/min at a distance (water) of 2 mm, consisting of an activity carrier and an encapsulation of the carrier made of a material compatible with the human body. A multilayer system made of metals and/or alloys is galvanically applied on the carrier. At least two layers in said system are made of ruthenium 106 and inactive intermediate layers made of other metals or alloys are provided between the radioactive ruthenium layers. The activity carrier is encapsulated with a material compatible with the human body, for instance a metal or a plastic material. Encapsulation can be carried out by filing a capsule and subsequently sealing or galvanically depositing a top layer made, for instance of hard gold.
A medical radioactive ruthenium radiation source having a dose rate of at least 1.5 Gy/min at a distance of 2 mm in water, comprising an activity carrier and an enclosure for said carrier made of a body-compatible material, the carrier having coated thereon a multilayer system of metals and/or alloys, wherein at least two layers consist of radioactive ruthenium, and wherein inactive intermediate layers of other metals or alloys are present between the radioactive ruthenium layers.
A method of producing medical radioactive ruthenium radiation sources by electrolytic deposition of radioactive ruthenium on a conductive carrier, wherein a multilayer system of metals and/or alloys is electrodeposited on the conductive carrier, wherein at least two of said layers are produced of radioactive ruthenium, and inactive intermediate layers of other metals or alloys are coated between the radioactive ruthenium layers, and the activity carrier thus obtained is enclosed by a body-compatible material.
Dependencies are inferred from the claim text.