Colloid for scintigraphy
US6706251B1 · kind B1 · utility
1Cited by
3References
70Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2001 |
| Grant date | Mar 16, 2004 |
| Priority date | — |
| Expiry date | Dec 21, 2021 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K51/1217
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A new formulation of Tc-99m colloid is described. The new colloid contains a high ratio of perrhenate to thiosulphate, cysteine, and a prepared higher final pH than found previously. In preparing the colloid preferred rhenium sulfide is not used as an ingredient. The pH of the final formulation and can be between about 5.5 an about 8.0, and the ratio of rhenium to sulfur is from about 0.05 to about 1.2. In addition, the new colloid has excellent radiochemical purity, and a much smaller particle size distribution than has generally been previously available for sulfur colloid preparations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.