Searching a role for endoscopic ultrasonography in Barrett's esophageus and other acid-related or gastrointestinal motility disorders.

Endoscopic ultrasonography (EUS) can image the GI-wall in detail. Substaging of T1-tumours (e.g. in Barrett's esophageus) is possible with EUS which may have clinical significance regarding therapeutic options. Abnormal motility occurs in several gastrointestinal (GI) diseases and EUS can be used in biomechanical and motility studies. Three-dimensional EUS, elastography and strain rate imaging are new techniques which are promising in imaging the GI-tract and in the examination of gut motility.