title: Why do we need contrast agents for ultrasound?
authors.affiliation: Department of Diagnostic Radiology, Hammersmith Hospital, London, U.K.
authors.forename: D
authors.initials: D
authors.lastname: Cosgrove
mesh_terms: D003287:Contrast Media; D006801:Humans; D007089:Image Enhancement; D014463:Ultrasonography / Q000379:methods*
chemical_list: D003287:Contrast Media