Method and device for reducing positron emitting isotope...

Details Method and device for reducing positron emitting isotope... Method and device for reducing positron emitting isotope...

2007-05-14

2010-12-28

Griffin, Walter D (Department: 1797)

Chemistry: analytical and immunological testing

Including use of radioactive properties

C436S165000, C436S164000, C422S129000, C422S159000

Reexamination Certificate

active

07858374

ABSTRACT:
A method and device for reducing positron emitter isotope labeled CO2to positron emitter isotope labeled CO generally includes introducing a volume of positron emitter isotope labeled CO2into a first heated reaction vessel comprising a metal oxide, such as Iron (II) Oxide such that the CO2is reduced to CO upon contact with the Iron (II) Oxide. The volume is then transferred to a second reaction vessel to remove any un-reacted CO2, preferably, via a soda-lime trap. The volume is then transferred to a target, e.g., a storage vessel or subject. The CO2includes one of [11C] or [15O]. The first reaction vessel is, preferably, heated to a temperature of between 900 and 1000° C., and more preferably, to between 925 and 975° C., and even more preferably, to approximately 950° C. Preferably, the Iron (II) Oxide powdered and has a particle size of about −10 mesh.

REFERENCES:
patent: 5859070 (1999-01-01), Jackson et al.
patent: 2005/0142055 (2005-06-01), Miyake et al.
patent: 1 463 065 (2004-09-01), None
Zeisler et al., Conversion of No-carrier-added [11C]carbon Dioxide to [11C]carbon Monoxide on Molybdenum for the synthesis of 11C-labelled Aromatic Ketones, 1997, Appl. Radit. Isot, vol. 48, No. 8, pp. 1091-1095.
G Stocklin et al, Radiopharmaceuticals for Positron Emission Tomography; Methodical Aspects. Kluwer Academic Publishers. vol. 23, 1993, p. 123.

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