ADVIA Centaur¿ T3 || ADVIA Centaur T3: For in vitro diagnostic use in the quantitative determination of triiodothyronine (T3) in serum using the ADVIA Centaur, ADVIA Centaur XP, and ADVIA Centaur XPT systems. Measurements of triiodothyronine are used in the diagnosis and treatment of thyroid disease.