Interest of Parametric Positron Emission Imaging in the Diagnosis of Infections on Cardiac Valve Prosthesis

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.