Cranial sonography - congenital anomolies; cranial sonography - intracranial hemorrhage, periventricular leukomalacia, and asphyxia; abdominal masses; gastrointestinal tract; liver diseases and portal hypertension; the biliary tract; paediatric renal anomolies and infections; paediatric and adolescent genital abnormalities; infant hip; paediatric doppler applications.