Introduction to DECT -- Technical aspects of DECT with dual source -- Technical aspects of DECT with dual layer -- Gemstone Imaging -- Neurovascular Imaging -- Neck imaging -- Thoracic imaging -- Abdominal imaging -- Upper and lower limbs imaging -- Technical Advancements for Cardiac Imaging -- Plaque characterization -- Accuracy of DECT in coronary arteries -- Beam Hardening Reduction and Image Quality Improvements with DECT -- Myocardial CT perfusion -- Myocardial viability -- Pitfalls -- Limitations -- Management of radiation -- Future.