Longitudinal wave


 * Reference for term: Ultrasonography - Goldberg, B. &amp; Pettersson, H.
 * Synonym: Compression wave
 * Reference for term: Basic Ultrasound - Meire, H.B. &amp; Farrant, P.
 * Technical definition: Sound wave in which the particles move backwards and forwards in the same direction as the ultrasound beam.
 * Reference for definition: Ultrasonography - Goldberg, B. &amp; Pettersson, H.
 * Comment: Longitudinal waves are used when ultrasound is conducted through soft tissues.