Evaluation of 68Ga-FAPI-46 and 18F-FDG PET/CT Imaging for Detecting Recurrent Tumor Lesions in Patients of Ovarian Cancer

Inclusion Criteria: * Pathologically proven ovarian cancer with complete response after therapy * Age between 30 and 80 * Elevation of serum CA125 value above the normal range (\>35 U/mL) or doubling of serum CA125 value within the normal range * ECOG performance status grade 0 or 1 and willing to receive further therapy if disease recurrence is confirmed * Willing to enter this prospective study with signed informed consent form Exclusion Criteria: * Patients with history of other malignancy * Patients who are pregnant or lactating * Patients with fasting fingerstick glucose level higher than 200 mg/dl * Known allergic reactions to components of the radiopharmaceutical solutions for intravenous injection for 68Ga-FAPI-46 or 18F-FDG imaging studies * Patients who are incapable of lying still for 30 minutes to receive the PET/CT scan as assessed by investigators