title: A sonographic technique to reduce beam distortion by curved interfaces.
abstract: Ultrasonic beams are distorted during propagation between two media with different velocities if the traversed interface is curved within the ultrasonic beamwidth. The distorting effects of various interfaces on a beam generated by a multi-element transducer are analyzed and a technique to reduce these by controlling the time delays to the individual elements is presented.
authors.affiliation: Ultrasonics Institute, Sydney, Australia.
authors.forename: G
authors.initials: G
authors.lastname: Kossoff
authors.forename: D A
authors.initials: DA
authors.lastname: Carpenter
authors.forename: D E
authors.initials: DE
authors.lastname: Robinson
authors.forename: D
authors.initials: D
authors.lastname: Ostry
authors.forename: P L
authors.initials: PL
authors.lastname: Ho
mesh_terms: D004867:Equipment Design; D007089:Image Enhancement / Q000379:methods*; D008433:Mathematics; D014159:Transducers; D014463:Ultrasonography / Q000295:instrumentation / Q000379:methods*