Carrier-added [67Ga]dimethylgallium(III) acetylacetonate, a four coordinate Ga complex with two hydrolytically-stable GaC bonds, was prepared at a specific activity of 2.8 mCi/mmol. The biodistribution of this tracer was determined following intravenous injection into rats as a 5% ethanol: 19% propylene glycol solution in saline. Although the myocardial levels of 67Ga were fairly constant over a 2 h time period (%ID/heart = 0.80 ± 0.19, 0.67 ± 0.04 and 0.62 ± 0.07 at 1, 30 and 120 min post-injection, respectively), somewhat slow clearance of activity from the blood would preclude the use of this organometallic gallium complex as a myocardial imaging agent.
ASJC Scopus subject areas
- Molecular Medicine
- Radiology Nuclear Medicine and imaging
- Cancer Research