68Ga-FAPI PET/CT in the Staging of High-Grade Epithelial Ovarian Cancers: A Pilot Study

Inclusion Criteria: * Patients will be eligible for inclusion in this study if they meet the following criteria: * Age ≥18 years. * Cytological or histological diagnosis of HGSOC, or clinical suspicion of HGSOC based on symptoms, physical exam, tumour markers, and imaging findings. * Clinical stage III or IV, being considered for PCS or NACT. * Contrast-enhanced CT abdomen and pelvis within 6 weeks of PET (prior to enrolment). Exclusion Criteria: Patients will be ineligible to participate in this study if they meet any of the following criteria: * Inability to provide informed consent. * Contraindications for PET examination as per institutional safety guidelines, including but not limited to pregnancy, or inability to lie still for PET examination. * Evidence of the following epithelial ovarian cancer histological subtypes: Mucinous, low-grade serous, low-grade endometrioid, and low-malignant potential tumours. * Non-ovarian advanced gynecological malignancy