Inclusion Criteria:  Patients aged at least 18 years. Patients in remission from proven stage III and above serous epithelial cancer of the ovary, peritoneum or tubes with complete macroscopic surgical resection (whether initial or interval) Signature of informed consent by the patient Affiliation to a French social security scheme (excluding AME)  Exclusion Criteria:  Patients with a contraindication to MRI or CT examination (wearing a material with magnetic properties : pacemaker, ferromagnetic material, etc.) Intolerance to iodinated contrast or gadolinium or severe renal failure (DFG <30 ml/min/1.73 m2) Patients deprived of their liberty and patients Under legal protection (under guardianship or under curatorship) Patients participating in another interventional research (in particular research with radiological exposure as well