Inclusion Criteria:  Age superior to18 years, Effective contraception for women of childbearing age or negative pregnancy test on the day of the exam Good general condition. WHO ≤ 1 Suspicion of endocarditis on a prosthetic heart valve implanted more than 3 months ago Labeled polynuclear scintigraphy performed within a maximum of 15 days before positron emission computed tomography Standard positron emission computed tomography planned as part of the extension assessment Informed and signed consent before any specific study procedure. Patient affiliated to the social security system  Exclusion Criteria:  Presence of an active cancer in the previous three years Pregnancy or breastfeeding Poorly controlled diabetic patients Protected adults (under guardians or curators) Impossible decubitus (orthopnea, ...), Hypersensitivity to FDG or to one of the excipients of the radiopharmaceutical.