Ultrasound nowadays is a well established diagnostic and therapeutic tool in diseases within several medical specialities. Furthermore, technical improvement of ultrasound equipment and continuous basic and clinical ultrasound research have increased the use of ultrasound within new fields. In gastroenterology, ultrasound has been used for several decades to perform B-mode imaging of the abdominal organs. However, the development of new techniques, . endoscopic ultrasonography, has made it possible to obtain detailed images of very small structures and to study pathophysiology of the gut. Ultrasound in gastroenterology is no longer limited to scanning of abdominal organs which, in many countries, is usually performed by radiologists. However, in gastroenterology, as in.
