Imaging Study of 18F-FAC PET Scans to Assess Standard Treatment in People With Pancreatic Cancer

Participants will receive a minimum of 4 mCi (148 MBq) and up to a maximum of 10 mCi (370 MBq) of \[18F\]-FAC intravenously. Injection is performed in conjunction with a dynamic PET acquisition over a site of the disease (pre-selected based on the findings from a previous CT or MRI and FDG PET/CT study done for clinical purpose such as staging). Patients will be offered a second \[18F\]-FAC PET scan procedure during their SOC treatment. This second scan will be optional.