importance of color duplex ultrasound in detecting and assessing various disease states.Topics include:Basic physical and technical principlesInnovative techniques and ultrasound contrast agents (e.g., power Doppler, SieScape imaging, clarify vascular enhancement, tissue Doppler, precision upsampling, arterial stiffness, eTracking)Vascular surgery: peripheral arterial occlusive disease, venous insufficiency and thrombosis, AV fistulae, and aneurysms. Endocrinology: thyroid glandInternal medicine: abdominal organs, lymph nodes, TIPSS. Nephrology: kidneys and renal allograftsNeurology: intra- and extracranial cerebral arteries. Cardiology: B- and M-mode imaging, cardiac anomalies, wall motion analysisUrology: testicular torsion, tumors, erectile dysfunction. Obstetrics and gynecology: tumors, anomalies, fetal perfusion defects