The purpose of this research study is to evaluate a PET tracer (68Ga-Citrate) that can localize the origin of patients diagnosed with fever of unknown origin (FUO) using a PET/MRI scanner. We hope to learn if this can detect FUO better than with the present nuclear imaging standard of care (67Ga SPECT).~We propose the following aim:~• To evaluate 68Ga Citrate PET/MRI for detection of origin of fever in patients with fever of unknown origin.~Patients disgnosed with fever of unknown origin are injected intravenously (IV) with 370 MBq of 68Ga Citrate. 45-60 minutes later, a whole body PET/MRI images are obtained.
This is a Phase III study to evaluate 68Ga Citrate PET/MRI for detection of origin of fever of unknown origin.