title: History and future directions in ultrasonography.
authors: Radosław
authors: R
authors: Pach
authors: Janusz
authors: J
authors: Legutko
authors: Piotr
authors: P
authors: Kulig
mesh_terms: D005060:Europe; D006331:Heart Diseases / Q000000981:diagnostic imaging* / Q000601:surgery; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D009369:Neoplasms / Q000000981:diagnostic imaging* / Q000601:surgery; D018084:Ultrasonography, Interventional / Q000266:history / Q000639:trends; D014481:United States