title: [Use of the frequency-dynamic aperture method in ultrasonic diagnostic systems].
authors.forename: N S
authors.initials: NS
authors.lastname: Kul'berg
authors.forename: L V
authors.initials: LV
authors.lastname: Osipov
authors.forename: A B
authors.initials: AB
authors.lastname: Elizarov
authors.forename: T V
authors.initials: TV
authors.lastname: Iakovleva
mesh_terms: D007090:Image Interpretation, Computer-Assisted; D019047:Phantoms, Imaging; D014463:Ultrasonography / Q000295:instrumentation* / Q000379:methods