title: Seeing the invisible: a short history of cardiac ultrasound.
authors.affiliation: University Hospital Rotterdam, Erasmus University Rotterdam, The Netherlands.
authors.forename: J R
authors.initials: JR
authors.lastname: Roelandt
mesh_terms: D004452:Echocardiography / Q000266:history*; D049673:History, 20th Century; D006801:Humans