Particulate material
AssigneeSirtex Medical Limited
InventorBruce Nathaniel Gray
Life of this patent
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Abstract
A particulate material comprises hollow or cup-shaped ceramic microspheres having a diameter in the range of from 5 to 200 microns, the microspheres being formed from a base material comprising greater than 70% by weight of yttria or another yttrium-containing compound together with one or more compounds selected from the group consisting of alumina or another aluminium-containing compound, zirconia or another zirconium-containing compound, and silica or another silicon-containing compound. The particulate material may comprise a beta-radiation emitting radionuclide ytrrium-90, and be used in selective internal radiation therapy (SIRT) of various forms of cancer and tumors.
Claims25
A particulate material comprising hollow or cup-shaped ceramic microspheres having a diameter in the range of from 5 to 200 microns, said microspheres being formed from a base material comprising greater than 70% by weight of yttria or another yttrium-containing compound together with one or more compounds selected from the group consisting of alumina or another aluminium-containing compound, zirconia or another zirconium-containing compound, and silica or another silicon-containing compound.
A radioactive particulate material comprising hollow or cup-shaped ceramic microspheres having a diameter with a range of from 5 to 200 microns and comprising a beta or gamma-radiation emitting radionuclide, said microspheres being formed from a base material comprising greater than 70% by weight of yttria or another yttrium-containing compound together with one or more compounds selected from the group consisting of alumina or another aluminium-containing compound, zirconia or another zirconium-containing compound, and silica or another silicon-containing compound.
A method of radiation therapy of a human or other mammalian patient, which comprises administration to the patient of a radioactive particulate material comprising hollow or cup-shaped ceramic microspheres having a diameter in the range of from 5 to 200 microns and comprising a beta or gamma-radiation emitting radionuclide, said microspheres being formed from a base material comprising greater than 70% by weight of yttria or another yttrium-containing compound together with one or more compounds selected from the group consisting of alumina or another aluminium-containing compound, zirconia or another zirconium-containing compound, and silica or another silicon-containing compound.
Dependencies are inferred from the claim text.