Enhancement


 * Reference for term: Musculoskeletal ultrasound - Holsbeeck Van, M. et al.
 * Technical definition: Artefact, created behind a low-attenuating medium, that shows the scanned object greater in amplitude than identical interfaces located in the neighbouring region.
 * Reference for definition: Ultrasound Physics and Instrumentation - Hedrick, W. et al.
 * Comment: When a structure that does not attenuate the ultrasound beam as much as surrounding tissues is encountered, more sound is available to image the structures at deeper levels. Therefore, echoes returning to the transducer have greater amplitude.