[Ultrasound diagnosis (sonography). Historical development--physical principles--clinical use].

Abstract

Ultrasound generation is known now since about 150 years. Echo sounding has been used in first world war to fix the position of submarines, now we apply the echo sounding method in medical imaging to representate and to distinguish organs and tissue structures. This requires good knowledge about physical and technological properties in ultrasonics and about tissue interaction with ultrasound waves.