The Department of Veterans Affairs San Diego Healthcare System is seeking information on potential sources for a medical-grade generator to produce Tc-99m labeled carbon nanoparticle aerosol for pulmonary ventilation imaging. The contract is planned as a firm fixed-price for a base period plus four option years, with performance at the VA San Diego Healthcare System in La Jolla, CA. The required system must be FDA-approved, generate aerosol using a high-temperature carbon crucible process with argon gas, and include automated safety features. Responses to this RFI are due by June 25, 2026, and are for planning purposes only, not a solicitation. No budget amount is specified.